CN113206506B

CN113206506B - Control method for suppressing active power fluctuation of photovoltaic and conventional energy networking

Info

Publication number: CN113206506B
Application number: CN202110668951.6A
Authority: CN
Inventors: 尹述红; 胡林; 周星; 李江; 杨忠; 倪旺丹; 李阳毅诚; 木永军; 冯志鹏; 闫兴建
Original assignee: Huaneng Lancang River Hydropower Co Ltd
Current assignee: Huaneng Lancang River Hydropower Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-04-22
Anticipated expiration: 2041-06-16
Also published as: CN113206506A

Abstract

The invention discloses a control method for suppressing active power fluctuation of photovoltaic and conventional energy networking, which is characterized in that a complementary integrated power centralized control center is used for carrying out coordination control on conventional energy and photovoltaic energy; the complementary integrated power supply centralized control center is provided with a complementary integrated unit, a conventional power supply unit and a photovoltaic power supply unit; the complementary integration unit sends an instruction for distributing a unit active power target value of the conventional power supply unit, an instruction for setting a primary frequency modulation regulation coefficient of the conventional power supply unit to the conventional power supply unit, and an instruction for recommending the start-up and shutdown operations of the photovoltaic power supply unit to the photovoltaic power supply unit; so as to meet the regulation requirements of the total active power set value and the primary frequency modulation of the complementary integrated power supply. The invention completely transfers the primary frequency modulation task of the photovoltaic power supply to the conventional power supply; the conventional power supply corrects the large-amplitude deviation of the real active power value of the photovoltaic power supply unit, and the effect of inhibiting the fluctuation of the active power is achieved.

Description

Control method for suppressing active power fluctuation of photovoltaic and conventional energy networking

Technical Field

The invention belongs to the technical field of automatic control of power systems, and relates to a control method for suppressing active power fluctuation of photovoltaic and conventional energy networking.

Background

With the implementation of new energy strategies, the proportion of photovoltaics in the Chinese power grid is increased continuously, but the photovoltaic power generation power station 'eats on the earth', the power generation capacity strongly depends on non-adjustable and non-storable meteorological resources, and the photovoltaic power generation power station has strong randomness and volatility characteristics, thereby seriously threatening the safety of the power grid.

Meanwhile, conventional power supply types represented by conventional hydropower stations and thermal power stations exist, the conventional power supplies take combustion heat energy and hydraulic potential energy of coal and natural gas as motive power sources of generators, so that the conventional power supplies have good adjustability and storability (depending on coal storage amount, gas storage amount or water storage capacity) compared with photovoltaic power, and are core supporting power supplies of power systems until now, but water and thermal power still have obvious performance difference in the adjusting process of primary frequency modulation and secondary frequency modulation due to different adjusting mechanisms, the comprehensive performance is that the adjusting performance of the secondary frequency modulation of the hydropower is obviously superior to that of the thermal power, and the adjusting performance of the primary frequency modulation is obviously inferior to that of the thermal power.

The unbalance between the power generation power and the power consumption of the power grid is represented by the deviation between the power grid frequency and the rated frequency (50Hz), when the deviation between the power grid frequency and the rated frequency exceeds a threshold value, the output active power of each grid-connected power station in a control range is regulated by scheduling, the power generation power and the power consumption of the power grid are restored to a balanced state, the difference between the power grid frequency and the rated frequency is ensured to be in an allowable range, and the whole process is called secondary frequency modulation. The secondary frequency modulation comprises the following steps: 1) the dispatching mechanism calculates the generating power variation required for enabling the power grid frequency to return to the rated frequency according to the power grid frequency deviation and the power grid frequency-power sensitivity coefficient; 2) the dispatching corrects the active power set value of each grid-connected power station in the control area according to the calculation result, and sends a power regulation instruction; 3) after each power station receives the new active power set value, the AGC distributes the total active power set value of the power station to each unit controlled by the AGC; 4) and the active power control system of each unit performs closed-loop feedback regulation on the active power of the unit according to the new single-unit active power set value.

When the deviation of the power grid frequency and the rated frequency exceeds a primary frequency modulation threshold value (most power grids in China are hydroelectric power 0.05Hz and thermal power 0.03Hz), the active power of each unit is adjusted by each unit speed regulator system according to a preset 'frequency-power' adjustment coefficient so as to make up the imbalance between the generating power and the consumed power of the power grid to a certain extent. Compared with secondary frequency modulation, because a unified control center is not provided for performing coordinated control on each unit participating in primary frequency modulation and is related to a calculation mechanism of an adjustment amount, the primary frequency modulation cannot enable the frequency of a power grid to be completely recovered to a rated frequency, so that the primary frequency modulation is also called as differential adjustment, but the primary frequency modulation has the advantages that: 1) because a uniform control center is not arranged, the risk of complete failure like secondary frequency modulation (for example, abnormal exit of a secondary frequency modulation function module is scheduled) is avoided, and thus extremely high overall reliability is obtained; 2) the regulating instruction is directly calculated by the unit, and processes of scheduling calculation, instruction transmission, AGC distribution of a power station and the like of secondary frequency modulation are omitted, so that the response speed to the power grid frequency abnormality is far higher than that of the secondary frequency modulation.

Photovoltaic and conventional power sources are taken as an organic whole, and power regulation tasks are performed aiming at dynamic balance of consumption and supply of a power system. Compared with a single photovoltaic power supply or a single conventional power supply, the solar photovoltaic power supply has the advantages that the solar photovoltaic power supply has the adjusting capacity equivalent to the conventional power supply in scale, and meanwhile, under the condition of abundant sunlight, the active power output of the conventional power supply can be correspondingly reduced, so that the energy-saving aims of water storage and coal saving are realized; however, the limitation is that the photovoltaic and conventional power supply complementary integrated power supply also has the aeipathia of the conventional power supply in terms of frequency adjustment, that is, "photovoltaic and hydroelectric" have the performance disadvantage of primary frequency modulation as well as hydroelectric, and "photovoltaic and fossil power" have the performance disadvantage of secondary frequency modulation as well as fossil power, and due to the existence of the inherent active power adjustment delay of the conventional power supply (no matter hydroelectric and fossil power), "photovoltaic and conventional energy" can only suppress to a certain extent and cannot solve the problem of random fluctuation of the output power of the photovoltaic power supply, and in an extreme case, when the output power of the photovoltaic power supply oscillates in a manner of approximate simple harmonic, the conventional power supply may even generate the resonant adjustment of the active power due to the adjustment delay, thereby exacerbating the overall output power oscillation of the photovoltaic and conventional energy complementary integrated power supply.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a control method for suppressing active power fluctuation of photovoltaic and conventional energy networking, and parameters such as an operation dead zone and the like are introduced into an active power control strategy to suppress the overall sensitivity of the control strategy.

The invention is realized by the following technical scheme:

a control method for suppressing active power fluctuation of photovoltaic and conventional energy networking is characterized in that a complementary integrated power centralized control center is used for carrying out coordination control on conventional energy and photovoltaic energy:

the complementary integrated power supply centralized control center is provided with a complementary integrated unit, a conventional power supply unit and a photovoltaic power supply unit; the complementary integration unit sends an instruction for distributing a unit active power target value of the conventional power supply unit, an instruction for setting a primary frequency modulation regulation coefficient of the conventional power supply unit to the conventional power supply unit, and an instruction for recommending the start-up and shutdown operations of the photovoltaic power supply unit to the photovoltaic power supply unit; so as to meet the regulation requirements of the total active power set value and the primary frequency modulation of the complementary integrated power supply;

the complementary integrated unit distributes unit active power target values of the conventional power supply unit as follows: the unit active power target value of the conventional power supply unit is equal to the calculated amount obtained by subtracting the unit active power real-time value of the photovoltaic power supply unit from the total active power set value of the complementary integrated power supply;

the real unit active power value of the photovoltaic power supply unit is involved in the calculated quantity, and is updated according to a fixed period based on the real unit active power value of the photovoltaic power supply unit and the output dead zone of the photovoltaic power supply unit;

the conventional power supply unit undertakes the primary frequency modulation task of the photovoltaic power supply unit, and the complementary integration unit sets the primary frequency modulation adjustment coefficient of the conventional power supply unit as follows: multiplying a primary frequency modulation regulation coefficient of a conventional power supply unit issued by a power grid by a primary frequency modulation scaling coefficient; the primary frequency modulation scaling coefficient is equal to (rated capacity of active power of the photovoltaic power supply unit + rated capacity of active power of the conventional power supply unit) ÷ rated capacity of active power of the conventional power supply unit;

the complementary integration unit generates a proposal for the on-off operation of the photovoltaic power supply unit according to a mismatching degree quantization value of an active power possible fluctuation sequence range corresponding to the on-off sequence of the photovoltaic power supply unit in a period of time in the future and a total active power set value of the complementary integrated power supply;

the conventional power supply unit obtains a conventional power supply control intermediate parameter according to basic parameters of a conventional power supply including water power and firepower, sends the conventional power supply control intermediate parameter to the complementary integrated unit, performs conventional power supply unit-level AGC distribution and unit active power closed-loop regulation according to a received active power target value and a primary frequency modulation regulation coefficient, and generates an operation suggestion of the conventional power supply unit;

the photovoltaic power supply unit sends the photovoltaic power supply control intermediate parameters to the complementary integration unit; and sending the suggested operation instructions of the start-up and shutdown of each photovoltaic generator set.

Compared with the prior art, the invention has the following beneficial technical effects:

for a photovoltaic power supply which does not have a primary frequency modulation function and must bear a primary frequency modulation obligation because the photovoltaic power supply is used as a power generation power supply, the invention adopts a control strategy of completely transferring a primary frequency modulation task to a conventional power supply; for a conventional power supply with primary frequency modulation and secondary frequency modulation functions, a control logic for preventing regulation conflict between the conventional power supply and the secondary frequency modulation is adopted, meanwhile, an operation dead zone and a scaling coefficient are introduced into an active power control strategy aiming at the nonideal of a regulation process and a regulation result caused by the problems of time delay, precision and the like of power supply unit regulation so as to inhibit the overall sensitivity of the control strategy and prevent the problems of overhigh calculation frequency, frequent change of a regulation target, excessive compensation and the like; the conventional power supply corrects the large-amplitude deviation of the real active power value of the photovoltaic power supply unit, and the effect of inhibiting the fluctuation of the active power is achieved.

Drawings

FIG. 1 is a simulation modeling diagram of a "conventional power supply + photovoltaic" complementary integrated power supply of the present invention;

FIG. 2 is a logic diagram of the present invention for finding a conventional power supply unit operating recommendation;

FIG. 3 is a simulation modeling diagram of the dynamic compensation of hydropower to thermal power of a conventional power supply unit of the present invention;

FIG. 4-1 is a diagram illustrating the effect of dynamic compensation adjustment of a conventional power supply unit according to the present invention;

FIG. 4-2 is a diagram illustrating the effect of the conventional power supply alone;

FIG. 5 is a logic diagram of the complementary integrated power supply of "conventional power supply + photovoltaic" of the present invention for finding suggestions for operating the photovoltaic generator set to start and stop;

fig. 6 is a diagram of the regulating effect of the complementary integrated power supply of "conventional power supply + photovoltaic" according to the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the following examples, which are intended to be illustrative, but not limiting, of the invention.

The received parameters of the complementary integrated unit include:

s1100), parameters input by a complementary integration unit:

s1111) directly inputting a total active power set value of the complementary integrated power supply;

s1112) a unit active power rated capacity, wherein the unit active power rated capacity of the conventional power supply is equal to the sum of the single machine active power rated capacities of the units that the type of power supply unit is generating; the unit active power rated capacity of the photovoltaic power supply is equal to the sum of the single machine active power rated capacities of the photovoltaic units generating electricity;

s1113) the real active power value of the unit is respectively equal to the sum of the real active power values of the single machines of the conventional power supply unit and the photovoltaic power supply unit;

s1120) input parameters transmitted by the regular power supply unit:

s1121) the unit primary frequency modulation target regulating quantity of the conventional power supply unit is equal to the sum of the single-machine primary frequency modulation target regulating quantities of the generating set;

s1122) a unit joint operation area of the conventional power supply unit;

s1123) unit primary frequency modulation actual regulating quantity of the conventional power supply unit;

s1124) a unit primary frequency modulation correction amount of the conventional power supply unit, which is equal to a unit primary frequency modulation actual adjustment amount of the conventional power supply unit when the primary frequency modulation actual adjustment amount of each unit of the conventional power supply unit can be measured, otherwise, is equal to a unit primary frequency modulation target adjustment amount of the conventional power supply unit in S1121;

s1125) adjusting dead zones of unit active power of the conventional power supply unit, wherein the dead zones are equal to the sum of the dead zones of single-machine active power adjustment of the unit in which the conventional power supply unit is running;

s1130) input parameters sent by the photovoltaic power supply unit:

s1131), the real unit active power value of the photovoltaic power supply unit participates in the calculated amount, and the photovoltaic power supply unit updates according to the real unit active power value and the output dead zone of each photovoltaic unit according to a fixed period;

s1132), the real unit active power value of the photovoltaic power supply unit is involved in the calculated value of the filtered value, and the photovoltaic power supply unit updates according to the real unit active power value, the scaling coefficient and the dead output area of each photovoltaic unit according to a fixed period;

s1133), the possible fluctuation range of the active power of the photovoltaic power supply unit is a prediction result of the fluctuation range of the active power of the photovoltaic power supply unit within a certain time in the future;

s1134), a starting sequence and a stopping sequence of the photovoltaic power supply units and a possible active power fluctuation range sequence respectively corresponding to the starting sequence and the stopping sequence are used for generating a starting and stopping operation suggestion for the photovoltaic unit.

S1135), the unit primary frequency modulation target regulating quantity of the photovoltaic power supply unit is equal to the sum of the single-machine primary frequency modulation target regulating quantity of the photovoltaic unit which is generating electricity.

The complementary integrated unit, the conventional power supply unit and the photovoltaic power supply unit are explained in detail below.

S2000) the operation of the conventional power supply unit includes the following operations:

s2100) determining a unit type of the conventional power supply unit:

s2110) dividing a hydroelectric generating set and a thermal generating set according to power energy and an adjusting mechanism;

s2120) dividing the generator set and the non-generator set according to different generator set states, wherein the non-generator set comprises a generator set in a shutdown state, a idling state, an idling state and an unsteady state;

s2130) according to the difference of the active power regulation controlled states of the generator set, further dividing the generator set into:

s2131) a single-machine open-loop unit, namely a unit of which the single-machine active power actual output value is not regulated by any source;

s2132) a single-machine closed-loop unit, namely, a single-machine active power real output value of the unit is subjected to closed-loop regulation according to a single-machine active power set value or an execution value, so that the single-machine active power real output value of the unit continuously tends to the single-machine active power set value or the execution value and is finally stabilized in the unit within a single-machine active power set value or execution value regulation dead zone range;

s2133) putting into an AGC unit, namely a unit closed loop, wherein the unit active power set value of the unit is distributed and set by unit-level AGC;

s2134) the unit which is not put into AGC, namely the generator units except the unit which is put into AGC, comprise a single-machine open-loop unit and a single-machine closed-loop unit which does not accept unit-level AGC distribution and setting of the active power set value of the single machine;

s2200) establishing a combined output model for each unit of the AGC, and calculating a combined operation area, a combined recommended operation area and a combined restricted operation area, wherein the combined output model comprises the following steps:

s2210) determining a single machine suggested operation area, a single machine limited operation area, a single machine forbidden operation area and a single machine operation area which are put into each unit of the AGC, comprising:

s2211) a stand-alone operation forbidden area refers to a load area in which the set value of the stand-alone active power of the unit is forbidden to be set (between the upper limit and the lower limit of the stand-alone operation forbidden area); the real value of the single-machine active power of the unit is allowed to pass through or pass through the single-machine forbidden operation area, but is not allowed to reside or stay in the single-machine forbidden operation area for a long time;

s2212) the single machine suggested operation area is a load area with high unit operation efficiency and stable operation when the single machine active power actual value of the unit is between the upper limit and the lower limit of the single machine suggested operation area; under the condition that the conditions allow, the single machine active power set value of the unit is preferably set in a single machine suggested operation area;

s2213) the stand-alone limited operation area refers to a load area between which the set value of the stand-alone active power of the unit is not generally recommended to be set (between the upper limit and the lower limit of the stand-alone limited operation area), but when the total active power set value of all the given units is distributed in the stand-alone recommended operation area, the set value of the stand-alone active power of the unit is also permitted to be set in the stand-alone limited operation area.

S2214) a stand-alone operation area, the stand-alone recommended operation area of S2212 and the stand-alone limited operation area of S2213 are collectively referred to as a stand-alone operation area;

s2215) the low-load area of the conventional thermal power unit is a single-machine forbidden operation area, the single-machine forbidden operation area of the thermal power unit is about 0-50% of rated capacity, and the rest part of the rated capacity minus the single-machine forbidden operation area is a single-machine suggested operation area;

s2216) the ranges of the single machine limited operation area, the single machine forbidden operation area and the single machine suggested operation area of the conventional hydroelectric generating set change along with the real-time water head change of the hydropower station and are conventional operation parameters of the set;

s2217) after the single machine rated capacity of the conventional power supply unit deducts the single machine forbidden operation area and the single machine limited operation area, the rest parts are single machine suggested operation areas, and the single machine rated capacity of the hydroelectric generating set changes along with the real-time water head change of the hydropower station.

S2220) establishing a suggested combined output model of the unit which is put into the AGC, and calculating a combined suggested operation area which is put into the AGC unit, wherein the method comprises the following steps:

s2221) according to the rated capacity of each unit, the forbidden operation area range of the unit, the limited operation area range of the unit and the recommended operation area range of the unit, the units which are put into AGC are grouped, and the units with the same parameters are divided into the same group;

s2222) respectively aiming at each group of units, calculating the grouping recommended operation area of each group of units in various recommended distribution modes according to the distribution condition of the output of each unit in each single-machine recommended operation area: determining various suggested distribution modes according to the number of single machine suggested operation areas and the number of units of each group of units, and then calculating a grouping suggested operation area of each group of units in each suggested distribution mode (refer to a patent ZL 201610333008.9 of an automatic generating active power output control method of a hydropower station);

s2223) aiming at all the units which are put into AGC, calculating the combined recommended operation areas which are respectively and correspondingly put into the AGC units when the units are in various recommended distribution modes and are combined in different modes according to different distribution modes of the units in a single machine recommended operation area and the corresponding grouped recommended operation areas of the units; the method comprises the following steps: according to the unit grouping result of S2221 and different distribution modes of the units in the single-machine suggested operation area, enumerating various combination modes of various suggested distribution modes of the units in AGC, such as S2222, and then calculating a combined suggested operation area of the units in AGC under each suggested distribution combination mode (refer to a patent of 'an automatic generating active output control method of hydropower station' ZL 201610333008.9);

s2224) solving a union set of the combined recommended operation areas of the AGC unit obtained in S2223 under all the recommended distribution combination modes to obtain a combined recommended operation area of the AGC unit;

s2225) determining available recommended distribution combination modes of the input AGC unit in each output interval in the combined recommended operation area according to the combined recommended operation area of the input AGC unit in each recommended distribution combination mode obtained in S2223, wherein the method comprises the following steps: and sequencing the upper limit and the lower limit of the combined recommended operation area corresponding to each recommended distribution combination mode obtained in the step S2223, then segmenting the combined recommended operation area which is fed into the AGC unit and is obtained in the step S2224 according to the sequenced upper limit and lower limit to obtain a plurality of output intervals, and then comparing each output interval with the combined recommended operation area corresponding to each recommended distribution combination mode which is fed into the AGC unit to obtain an available recommended distribution combination mode in each output interval.

S2230) establishing a limited combined output model which is put into the AGC unit, and calculating a combined operation area and a combined limited operation area which are put into the AGC unit, wherein the method comprises the following steps:

s2231) grouping the units which are put into AGC according to the mode of S2221;

s2232) calculating the grouping operation area of each group of units in various distribution modes according to the distribution condition of the output of each group of units in each single-machine operation area, including: determining various distribution modes according to the number of the single machine operation areas and the number of the machine units of each group of machine units, and then calculating the grouping operation areas of each group of machine units in each distribution mode (refer to a patent of an automatic generating active output control method of a hydropower station ZL 201610333008.9);

s2233) calculating the combined operation areas of the AGC units corresponding to each group in various distribution modes and different modes when the groups are combined according to different distribution modes of each group in a single machine operation area and the corresponding group operation area of each group, aiming at all the AGC units; the method comprises the following steps: enumerating various combination modes of various distribution modes of various groups of units which are put into AGC (automatic gain control) as described in S2232 according to the grouping result of the units in S2231 and different distribution modes of the units in the single-machine operation areas, and then calculating the combined operation area of the units which are put into AGC in each distribution combination mode;

s2234) calculating a combined operation area and a combined limited operation area which are put into the AGC unit, wherein the method comprises the following steps: obtaining a union set of combined operation areas of the AGC unit obtained in the step S2233 in all distributed combination modes to obtain a combined operation area of the AGC unit, and then deducting a combined recommended operation area obtained in the step S2224 from the combined operation area of the AGC unit to obtain a combined restricted operation area of the AGC unit;

s2235) determining available distribution limiting combination modes of the input AGC unit in each output interval in the combined distribution limiting operation area according to the combined operation area of the input AGC unit in various distribution combination modes obtained in S2233, wherein the available distribution limiting combination modes comprise: and sequencing the upper limit and the lower limit of the combined operation area corresponding to each distribution combination mode obtained in the step S2233, then dividing the combined limited operation area which is fed into the AGC unit and is obtained in the step S2234 according to the sequenced upper limit and lower limit to obtain a plurality of output intervals, and then comparing each output interval with the combined operation area corresponding to each distribution combination mode which is fed into the AGC unit to obtain the available limited distribution combination mode in each output interval.

S2240) determining the current single-machine AGC active power distribution value of each unit, including:

s2241) for the unit which is put into the AGC, the unit AGC active power distribution value is distributed by the unit-level AGC;

s2242) for a single-machine closed-loop unit which is not put into AGC, tracking a single-machine active power set value by a single-machine AGC active power distribution value;

s2243) for the single-machine open-loop unit which is not put into the AGC, the single-machine AGC active power distribution value tracks the single-machine active power set value, and the single-machine active power set value is assigned by the single-machine active power real sending value, namely when the single-machine active power set value is not equal to the single-machine active power real sending value and the absolute value of the difference between the single-machine active power set value and the single-machine active power set value is larger than the single-machine active power regulation dead zone, the single-machine active power real sending value is written into the single-machine active power set value.

S2250) adding the joint suggestion operation area obtained in S2224 into the single AGC active power distribution value of the AGC unit and not added into the AGC unit to obtain a unit joint suggestion operation area of the conventional power supply, and providing reference for automatic control of the active power of the conventional power supply unit;

s2260) adding the combined operation area of the AGC unit obtained in the step S2234 and the distribution values of the active power of all the stand-alone AGC units which are not put into the AGC unit to obtain a unit combined operation area of the conventional power supply, and providing reference for the automatic control of the active power of the conventional power supply unit and the comprehensive control of the complementary integrated power supply;

s2270) adding the combined limited operation area of the AGC unit obtained in the step S2234 and the active power distribution values of all the stand-alone AGC units which are not put into the AGC unit to obtain a unit combined limited operation area of the conventional power supply, and providing reference for automatic control of the active power of the conventional power supply unit.

S2300) comparing the unit active power target value of the conventional power supply with the unit combined operation area in the S2260, and skipping the rest step of the S2300 if the unit active power target value is feasible when the unit active power target value is included in the unit combined operation area; when the unit active power target value is not included in the unit joint operation area, the unit active power target value is not feasible, and then as shown in fig. 2, an operation proposal for making the unit active power target value feasible is found:

s2320) finding a running operation proposal for making the unit active power target value of the conventional power supply feasible by putting the unit not put into AGC control, including:

s2321) setting a loop variable i₁，i₁Is set to 1;

s2322) for i₁Making a judgment if i₁If the number of the units not put into the AGC is larger than the number of the units not put into the AGC, the S2320 is terminated, otherwise, the following steps are continuously executed to find the number of the units i₁The unit which is not put into AGC is put into AGC control so that the unit active power target value of the conventional power supply becomes feasible;

s2323) listing and selecting i from all the units which are not put into AGC₁All combinations of stages, C (j)₁,i₁) Wherein C () is a combination number function, j₁The number of the units which are not put into AGC;

s2324) C (j) listed respectively as S2323₁,i₁) In the combination mode, a unit which is selected in various modes and is not put into AGC is assumed to be put into AGC, a unit joint operation area and a unit joint suggested operation area are calculated by adopting the S2200 method, and then the feasibility of the unit active power target value is judged again by adopting the S2300 method according to the newly calculated unit joint operation area;

s2325) calculating the result according to S2324 if the result existsAnd if the unit joint operation area regenerated in multiple ways can enable the unit active power target value to be feasible, generating operation suggestions, namely 'putting the unit selected in the way and not put into AGC', respectively generating operation suggestions according to the ways, namely 'putting the unit selected in the corresponding way and not put into AGC', skipping to step S2326 to continue execution, and if the unit joint operation area regenerated in no way can enable the unit active power target value to be feasible, i₁＝i₁+1, then go to step S2322 for i₁And judging whether the number of the units not put into the AGC is larger than that of the units not put into the AGC, and determining whether to execute the subsequent steps according to the judgment result.

S2326) carrying out priority ordering on the plurality of operation suggestions generated in the S2325 according to the condition that the operation suggestions are respectively and correspondingly selected from the unit which is not put into AGC₁The combination mode of the station set and the changed unit joint operation area and unit joint recommended operation area range corresponding to each operation proposal obtained in S2324 are respectively as follows according to the sequence from high to low: whether the unit active power target value (is better than or not) belongs to a unit combined suggested operation area, the number of the hydro-electric units (more is better) and the thermal-electric units (less is better) in the selected units, and the absolute value of the difference value of the unit active power target value from the boundary or the subsection boundary of the unit combined operation area (the larger is better).

S2330) find operational recommendations to make the unit active power target value of the regular power supply feasible by turning the non-generating set to the generating state and putting it into AGC, including:

s2331) setting a circulation variable i₂，i₂Is set to 1;

s2332) pairs of i₂Making a judgment if i₂If the number of the units which are available and do not generate electricity is larger than the number of the units which are available and do not generate electricity, the step S2330 is terminated, otherwise, the following steps are continuously executed to search for the unit i₂The set available and not generating is switched to generating state and put into AGC to make the unit active power target value of the conventional power supply feasibleRunning an operation suggestion;

s2333) enumerating the selection of i from all available and unenergized units₂All combinations of stages, C (j)₂,i₂) Wherein j is₂The number of units which are available and not generating electricity;

s2334) C (j) listed according to S2333, respectively₂,i₂) A combination mode is adopted, available and non-power generation units selected in various modes are assumed to be in a power generation state and are put into AGC, a unit joint operation area and a unit joint recommended operation area are calculated by adopting the S2200 method again, and then the feasibility of the unit active power target value is judged again by adopting the S2300 method according to the newly calculated unit joint operation area;

s2335) according to the calculation result of S2334, if there are and only 1 unit joint operation area regenerated by 1 mode to enable the unit active power target value, generating operation suggestions, namely converting the available and non-power generation unit selected by the mode into the power generation state and putting the unit into AGC, if there are unit joint operation areas regenerated by multiple modes to enable the unit active power target value, respectively generating operation suggestions according to the modes, namely converting the available and non-power generation unit selected by the corresponding mode into the power generation state and putting the unit into AGC, and jumping to step S2336 to continue execution, if there is no unit joint operation area regenerated by any mode to enable the unit active power target value, i₂＝i₂+1, and then go to step S2332 for i₂And judging whether the number of the units is larger than the number of the available and non-power generation units, and determining whether to execute the subsequent steps according to the judgment result.

S2336) carrying out priority ordering on the plurality of operation suggestions generated in the S2335 according to the condition that the operation suggestions are respectively and correspondingly selected to be i from available and non-power generation units₂The combination mode of the station set and the range of the unit joint operation area and the unit joint recommended operation area after the change corresponding to each operation proposal obtained in S2334, respectively, the sequencing bases are respectively from high to low according to the importance degree: selecting the number of the hydro-electric units (more is better) and the thermal power units (less is better) in the units, and whether the unit active power target value isAnd (if the difference is better than the difference, namely whether the difference is larger, the difference is better) belongs to a unit joint suggested operation area, a unit active power target value and a unit joint operation area boundary or a segment boundary, wherein the importance degrees of the first two bases are very close to each other.

S2340) finding a running operational recommendation that makes a unit active power target value of a regular power source feasible by turning a generating unit to a non-generating state, comprising:

s2341) setting a Loop variable i₃，i₃Is set to 1;

s2342) pairs of i₃Making a judgment if i₃If the number of the generating units is larger than the number of the generating units, S2340 is ended, otherwise, the following steps are continuously executed to find the number i of the generating units₃The unit of the platform power generation is changed into a non-power generation state, so that the unit active power target value of the conventional power supply becomes feasible;

s2343) listing and selecting i from all power generation units₃All combinations of stages, C (j)₃,i₃) Wherein j is₃The number of generating units;

s2344) C (j) listed according to S2343, respectively₃,i₃) In the combination mode, the unit for generating power selected by various modes is assumed to be in a non-power generation state, the unit combined operation area and the unit combined suggested operation area are calculated by adopting the S2200 method, and then the feasibility of the unit active power target value is judged again by adopting the S2300 method according to the newly calculated unit combined operation area;

s2345) according to the calculation result of S2344, if the unit active power target value is feasible by the unit joint operation area regenerated in only 1 mode, generating operation suggestions, namely converting the generating set selected in the mode into the non-generating state, if the unit active power target value is feasible by the unit joint operation area regenerated in multiple modes, respectively generating operation suggestions, namely converting the generating set selected in the corresponding mode into the non-generating state, according to the modes, jumping to the step S2346 to continue execution, and if the unit active power target value is feasible by the unit joint operation area regenerated in no mode, then executing the operation suggestionsi₃＝i₃+1, and then go to step S2342 for i₃And judging whether the number of the units is larger than the number of the generating sets or not, and determining whether to execute the subsequent steps or not according to a judgment result.

S2346) carrying out priority ranking on the multiple operation suggestions generated in the S2345 according to the fact that the operation suggestions are selected from the generating set i correspondingly₃The combination mode of the station set and the range of the unit joint operation area and the unit joint recommended operation area after the operation suggestions obtained in step S2344 are changed correspondingly, and the ranking is respectively from high to low according to the importance degree: and selecting the number of the units which are not subjected to AGC (the more the units are better) and the number of the units which are subjected to AGC (the less the units are better), and whether the unit active power target value belongs to a unit joint suggested operation area or not (whether the unit active power target value is better than the unit active power target value, and the absolute value of the difference value of the unit active power target value from the boundary of the unit joint operation area or the segmentation boundary (the larger the unit active power target value is better).

S2350) classifying the operation suggestions generated by the S2320, the S2330 and the S2340, and orderly displaying the operation suggestions according to the priorities (when more than 1 operation suggestion in a certain class is obtained) obtained by the S2326, the S2336 and the S2346 so as to assist the decision of an operator.

S2400) calculating a single AGC active power distribution value which is put into an AGC unit, wherein the calculation comprises the following steps:

s2410) calculating unit AGC active power allocation values of the conventional power supply, including:

s2411) calculating the active power distribution values of all single AGC units which are not put into the AGC unit, wherein the obtaining mode of the active power distribution values of the single AGC units is as the mode of S2240;

s2412) subtracting all single AGC active power distribution values which are not put into the AGC unit from the unit active power target value to obtain a unit AGC active power distribution value.

S2420) when a specific condition is satisfied, starting a unit-level AGC distribution process of the conventional power supply, where the triggering condition includes:

s2421) the sum of the active power distribution values of all the stand-alone AGC units which are put into the AGC unit is not equal to (larger than or smaller than) the active power distribution value of the unit AGC unit obtained in the S2410;

s2422) the combined output model or the combined operation area, the combined recommended operation area and the combined limited operation area which are put into the AGC unit are changed;

s2423) the unit with AGC quits the unit-level AGC, or the unit without AGC is put into the unit-level AGC;

s2424) the range of the single machine active power rated capacity, the single machine forbidden operation area, the single machine limited operation area and the single machine recommended operation area of the hydropower unit with the AGC is changed due to the variation of the hydropower station water head.

S2430) determining a target distribution combination mode put into an AGC unit, comprising the following steps:

s2431) if the active power allocation value of the unit AGC obtained in S2410 is in the joint recommended operation area of the input AGC set, determining all recommended distribution combination manners of the input AGC set that can satisfy the active power allocation value of the unit AGC as available distribution combination manners according to the available recommended distribution combination manners of the input AGC set in each output area of the joint recommended operation area obtained in S2225, otherwise determining all restricted distribution combination manners of the input AGC set that can satisfy the active power allocation value of the unit AGC as available distribution combination manners according to the available restricted distribution combination manners of the input AGC set in each output area of the joint restricted operation area obtained in S2235;

s2432) selecting a combination mode of the minimum unit in the single-machine limited operation area from all available distribution combination modes obtained in S2431 as an available distribution combination mode;

s2433) if more than one available distribution combination mode is obtained in S2432, comparing with the current distribution combination mode, selecting the distribution combination mode with the fewest number of the set passing through the single-machine forbidden operation area as the target distribution combination mode, and if a plurality of distribution combination modes are the fewest number of the set passing through the single-machine forbidden operation area and are the same, all the distribution combination modes are used as the target distribution combination mode.

S2440) determining a target output combination mode put into an AGC unit, comprising the following steps:

s2441) enumerating all output combination modes which can meet the target distribution combination mode obtained in S2430 when the AGC unit is put into the AGC unit;

s2442) comparing all the output combination modes listed in S2441 with the current operation areas of the units which are put into the AGC, and selecting the output combination mode with the minimum number of the units passing through the single-machine operation forbidden area as a target output combination mode;

s2443) if the target output combination modes obtained in S2442 are more than 1, weighting the target output combination modes obtained in S2442 and adding the weighted target output combination modes into the bad working condition operation priority of the AGC unit, wherein the weighting mode is to accumulate and sum the bad working condition operation priorities of the units in the single-machine limited operation area, and selecting the output combination mode of which the minimum weighted number of the units are in the single-machine limited operation area as the target output combination mode, wherein the bad working condition operation priorities of the units can adopt two setting modes of manual operation and automatic operation, and the bad working condition operation priorities are manually set by operators when the manual setting mode is adopted; when an automatic setting mode is adopted, the system automatically carries out weighted statistics on the running time of each unit in the limited running area and the forbidden running area since the last overhaul period, sorts the time after weighted statistics of each unit, and then sets automatic priorities from high to low in sequence according to the weighted time from short to long;

s2443) if the target output combination modes obtained in the S2443 are more than 1, selecting the output combination mode of the minimum weighting secondary unit passing through the single-machine forbidden operation area from the target output combination modes obtained in the S2443 as the target output combination mode after weighting the bad working condition operation priority of the AGC unit.

S2450) according to the target output combination mode of the AGC units, carrying out AGC active power distribution on the AGC units, which comprises the following steps:

s2451) comparing a target operation area of each unit of AGC with a current operation area in a target output combination mode, correcting the active power distribution value of the original single-machine AGC to a limit value which is closest to the current single-machine operation area in the upper limit and the lower limit of the target operation area for the unit with changed single-machine operation area, and then correcting the active power distribution values of the original single-machine AGC used in S2452, S2453 and S2454 to be the corrected values;

s2452) calculating the result of subtracting the sum of the active power distribution values of all original single machines AGC put into the AGC unit from the active power distribution value of the unit AGC, and taking the result as a value to be distributed;

s2453) if the value to be distributed obtained in S2452 is greater than 0, calculating the absolute value of the difference between the active power distribution value of the original single AGC of each unit to be fed into AGC and the upper limit of the target operation area as the single machine distributable value, and if the value to be distributed obtained in S2452 is less than 0, calculating the absolute value of the difference between the active power distribution value of the single AGC of each unit to be fed into AGC and the lower limit of the target operation area as the single machine distributable value;

s2454) distributing the value to be distributed obtained in S2452 to each unit for feeding AGC in a manner of equal proportion to the distributable value of each unit for feeding AGC obtained in S2453, and superposing the distribution result with the active power distribution value of the original unit AGC of each unit to obtain the active power distribution value of the unit AGC of each unit for feeding AGC.

S2500) correcting the single-machine AGC active power distribution value of the hydroelectric generating set which is put into AGC to obtain a single-machine AGC active power correction distribution value, dynamically compensating the problem of poor secondary frequency modulation performance of the thermal power generating set by the hydroelectric generating set, wherein a control model is shown in figure 3, and the adjusting effect is shown in figure 4-1 (the comparison effect is shown in figure 4-2), and the method comprises the following steps:

s2510) calculating an adjustable margin of a hydro-electric machine set in a conventional power supply unit, which can be used for dynamically compensating the adjusting process of a thermal power generating unit, comprises the following steps:

s2511) calculating the increment margin of the active power distribution value of the single AGC of each hydroelectric generating set which is put into AGC obtained in S2454: subtracting the single AGC active power distribution value from the upper limit of the single machine operation area where the single AGC active power distribution value of each hydroelectric generating set is located;

s2512) calculating the reducible margin of the active power distribution value of the single AGC of each AGC-invested hydroelectric generating set obtained in S2454: subtracting the lower limit of the single machine operation area where the single machine AGC active power distribution value is positioned from the single machine AGC active power distribution value of each hydroelectric generating set;

s2513) adding the increasing margins of the hydroelectric generating sets which are put into the AGC obtained in the step S2511 to obtain the total increasing margin of the hydroelectric generating sets of the conventional power supply unit;

s2514) adding the reducible margins of the hydroelectric generating sets which are put into the AGC obtained in the step S2512 to obtain the total reducible margin of the hydroelectric generating sets of the conventional power supply unit;

s2520) determining the primary frequency modulation correction quantity of each single closed-loop unit of the conventional power supply unit, including:

s2521) calculating a grid frequency deviation: the power grid frequency deviation is equal to the power grid rated frequency (50Hz) minus the real-time frequency of the power grid;

s2522) if the absolute value of the power grid frequency deviation is less than or equal to a primary frequency modulation threshold of the unit, the primary frequency modulation correction of the unit is equal to 0, wherein the primary frequency modulation threshold of the unit is related to the type of the unit and is influenced by a regulating mechanism, and the primary frequency modulation threshold of the thermal power unit is less than the primary frequency modulation threshold of the hydroelectric power unit, the primary frequency modulation threshold of the thermal power unit is usually 0.03Hz, and the primary frequency modulation threshold of the hydroelectric power unit is usually 0.05 Hz;

s2523) if the absolute value of the power grid frequency deviation is greater than the unit primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity is equal to the power grid frequency deviation obtained by multiplying the unit rated capacity by S2521 and then multiplying the power grid frequency deviation by a unit primary frequency modulation regulating coefficient, wherein the unit primary frequency modulation regulating coefficient is calculated by the complementary integrated unit;

s2524) when the actual regulating variable of the primary frequency modulation of the unit can be measured or obtained, the correction quantity of the primary frequency modulation of the unit is equal to the actual regulating variable of the primary frequency modulation, otherwise, the correction quantity of the primary frequency modulation of the unit is equal to the target regulating variable of the primary frequency modulation of the unit obtained in the S2523.

S2530) calculating the dynamic compensation demand in the regulating process of the fire generator set in the conventional power supply unit, wherein the dynamic compensation demand comprises the following steps:

s2531) calculating dynamic adjustment deviation of each single closed-loop thermal power generating unit (including thermal power generating units with AGC and single closed-loop thermal power generating units without AGC) of the conventional power supply unit: adding the primary frequency modulation correction quantity obtained by adding the S2520 to the single AGC active power distribution value of each single closed-loop thermal power generating unit, and then subtracting the single active power actual value;

s2532) judging the dynamic adjustment deviation of each single-machine closed-loop thermal power generating unit obtained in the step S2531, wherein if the absolute value of the dynamic adjustment deviation of the unit is larger than the single-machine active power adjustment dead zone, the dynamic compensation demand of the unit is equal to the dynamic adjustment deviation, and otherwise, the dynamic compensation demand of the unit is equal to 0;

s2533) adding the dynamic compensation demand of all the single closed-loop thermal power generating units in the conventional power supply unit to obtain the total dynamic compensation demand of the thermal power generating unit of the conventional power supply unit.

S2540) calculating the total dynamic compensation amount put into the AGC hydroelectric generating set in the conventional power supply unit, wherein the total dynamic compensation amount comprises the following steps:

s2541) setting a compensation scaling coefficient which is smaller than 1 and larger than 0 according to prior experience for calculating the total dynamic compensation amount, wherein the compensation scaling coefficient is used for preventing excessive compensation which is possibly caused by the adjustment delay of the hydroelectric generating set;

s2542) when the total dynamic compensation demand of the thermal power generating unit obtained in the S2533 is equal to 0, the total dynamic compensation of the hydroelectric generating unit is also equal to 0;

s2543) when the total dynamic compensation demand of the thermal power generating unit obtained in the S2533 is larger than 0, multiplying the total dynamic compensation demand by a compensation scaling coefficient, and comparing the result with the total increasable margin of the hydroelectric generating unit obtained in the S2513, wherein if the former is smaller than or equal to the latter, the total dynamic compensation of the hydroelectric generating unit is equal to the former, otherwise, the total dynamic compensation of the hydroelectric generating unit is equal to the latter;

s2543) when the total dynamic compensation demand of the thermal power generating unit obtained in the S2533 is smaller than 0, multiplying the absolute value of the total dynamic compensation demand by a compensation scaling coefficient, and then comparing the absolute value with the total reducible margin of the hydroelectric generating unit obtained in the S2514, wherein if the absolute value of the total dynamic compensation demand is smaller than or equal to the total reducible margin of the hydroelectric generating unit, the total dynamic compensation of the hydroelectric generating unit is equal to the total dynamic compensation demand of the thermal power generating unit multiplied by the compensation scaling coefficient, otherwise, the total dynamic compensation of the hydroelectric generating unit is equal to the negative number of the total reducible margin of the hydroelectric generating unit;

s2544) comparing the result obtained by multiplying the total dynamic compensation demand of the thermal power generating unit by the compensation scaling coefficient with the total dynamic compensation of the hydroelectric generating unit according to a fixed period, and if the absolute value of the difference between the two is larger than the sum of single-machine active power adjustment dead zones of all the generating thermal power generating units, or the absolute value of the difference is equal to 0 and the difference is not equal to 0, executing the step S2540 again.

S2550) distributing the total dynamic compensation amount of the hydropower units which are put into the AGC to each hydropower unit which is put into the AGC to obtain the single machine dynamic compensation amount of each hydropower unit which is put into the AGC, wherein the method comprises the following steps:

s2551) when the total dynamic compensation quantity of the hydroelectric generating set is equal to 0, the single-machine dynamic compensation quantity of each hydropower generating set which is put into the AGC is equal to 0;

s2552) when the total dynamic compensation amount of the hydroelectric generating sets is larger than 0, the total dynamic compensation amount is distributed to each hydroelectric generating set according to the proportion of the margin in the total increasable margin of each hydroelectric generating set added to the AGC single-machine AGC active power distribution value of each hydroelectric generating set; the calculation mode is that the total dynamic compensation quantity is divided by the total increasable margin and then multiplied by the increasable margin of the unit single AGC active power distribution value;

s2553) when the total dynamic compensation amount of the hydroelectric generating sets is smaller than 0, distributing the total dynamic compensation amount to each hydroelectric generating set according to the proportion of the reducible margin of each input AGC hydroelectric generating set single-machine AGC active power distribution value in the total reducible margin of the hydroelectric generating sets; the calculation method is that the total dynamic compensation quantity is divided by the total reducible margin and then multiplied by the reducible margin of the unit single AGC active power distribution value.

And S2560) adding the single machine dynamic compensation amount input into each hydroelectric generating set in the step S2550 and the single machine AGC active power distribution value of each generating set obtained in the step S2450 to obtain a single machine AGC active power correction distribution value input into each hydroelectric generating set in the step AGC by the conventional power supply unit.

S2600) active power regulation of each single closed-loop unit of the conventional power supply unit, including:

s2610) confirm the unit active power setting value of each unit closed loop unit, include:

s2611) for the stand-alone closed loop unit which is not put into AGC, the stand-alone active power set value is manually set by an operator;

s2612) for the thermal power unit which is put into the AGC, the single machine active power set value is equal to the single machine AGC active power distribution value;

and S2613) for the hydroelectric generating set which is put into the AGC, the single-machine active power set value is equal to the single-machine AGC active power correction distribution value obtained in the S2560.

S2620) superposing the single-machine active power set value of each single-machine closed-loop unit of the conventional power supply unit and the primary frequency modulation correction value obtained in S2520 to obtain a single-machine active power execution value of each unit; the problems that the adjustment quantity of the primary frequency modulation is regarded as power disturbance pull-back by the secondary frequency modulation and the primary frequency modulation conflict with each other are solved;

s2630) an active power control system of each single-machine closed-loop unit of the conventional power supply unit calculates the deviation between a single-machine active power actual value and a single-machine active power execution value by taking the single-machine active power execution value as a target, and outputs continuous signals according to a calculation result to adjust the single-machine active power actual value of the unit so as to lead the single-machine active power actual value of the unit to tend to the single-machine active power execution value and finally be stabilized in the adjustment dead zone range of the single-machine active power execution value.

S3000), running of the photovoltaic power supply unit:

s3100) aiming at the characteristics that the active power of the photovoltaic power supply cannot be adjusted, and the output power is fluctuant and intermittent, generating the future T for each unit₁Possible fluctuation range of active power in time is calculated, and possible fluctuation range of unit active power of the photovoltaic power supply is calculated, wherein T₁For the manual setting parameter, the purpose is in order to reserve sufficient time for the perhaps start-up and shut-down operation of photovoltaic unit, include:

s3110) if a power prediction system is deployed, adopting future T of each photovoltaic unit output by a power prediction function₁The power prediction system is a system which adopts a physical method, a regression method, a time series method, a neural network method, a deep learning method and the like to establish a prediction model according to the past power, the contemporaneous historical data, the seasonal variation, the weather forecast and the like, and predicts the future active power variation trend of the photovoltaic power supply, and in order to improve the accuracy and the availability of a prediction result, the prediction system usually adopts an interval prediction method, namely, the maximum value and the minimum value which are possible to reach by the active power variation are predicted;

s3120) if the power prediction system is not deployed, employing a method comprising:

s3121) forPhotovoltaic units for power generation using current power multiplied by an upper prediction parameter as future T₁Taking the upper limit value of the possible fluctuation range of the active power in time and multiplying the current power by the lower limit prediction parameter as the lower limit value of the possible fluctuation range of the active power, wherein the upper limit prediction parameter is more than 1 and the lower limit prediction parameter is more than 0, and considering the technical development degree of the current photovoltaic forecast, the difference value between the upper limit prediction parameter and the lower limit prediction parameter is generally smaller so as to form a smaller possible fluctuation range of the active power, and the possible fluctuation range of the active power is along with T₁Is increased with an increase in;

s3122) for photovoltaic installations not generating electricity, future T using generator sets with performance consistent or similar to that of the photovoltaic installations not generating electricity (in particular with a single-machine capacity)₁The possible fluctuation range of the active power in time is used as the future T of the unit₁The possible fluctuation range of active power in time;

s3123) for the upper limit prediction parameter and the lower limit prediction parameter described in S3121, a fixed value may be used, or different parameters may be used at different time points, where the latter is more suitable for photovoltaic power stations with an obvious time regularity in the year and day, for example, a higher prediction parameter is used in a period after sunrise, and a lower prediction parameter is used in a period before sunset.

S3130) calculating a future T₁The unit active power possible fluctuation range of the photovoltaic power supply unit in time comprises the following steps:

s3131) future T₁Accumulating and summing the upper limits of possible fluctuation ranges of the active power of all the generator sets of the photovoltaic power supply unit within the time, namely the sum is the future T₁The upper limit of the possible fluctuation range of the unit active power of the photovoltaic power supply unit within the time;

s3132) future T₁Accumulating and summing the lower limits of possible fluctuation ranges of the active power of all the generator sets of the photovoltaic power supply unit in time, namely obtaining the T in the future₁And the lower limit of the possible fluctuation range of the unit active power of the photovoltaic power supply unit in time.

S3200) respectively generating startup and shutdown sequences aiming at the photovoltaic unit, comprising:

s3210) generating a shutdown sequence of the generating photovoltaic unit, wherein the priority is calculated according to the duration of the unit in the generating state, and the longer the duration of the unit in the generating state is, the higher the priority is;

s3220) generates a startup sequence of available and non-generating photovoltaic units, the priority is calculated according to the duration of the units in the non-generating state, the longer the duration in the non-generating state, the higher the priority, the so-called available and non-generating units are relative to the unavailable units which cannot be converted into the generating state due to equipment failure or maintenance work.

S3300) respectively generating possible fluctuation range sequences of active power corresponding to the startup and shutdown sequences aiming at the photovoltaic unit, wherein the possible fluctuation range sequences comprise:

s3310) generating, for the photovoltaic set, a possible fluctuation range sequence of active power corresponding to the startup sequence, respectively:

s3311) setting variable u₁，u₁Is 1;

s3312) adding the possible fluctuation range of the active power of the photovoltaic power supply unit obtained in S3130 to the sequence u in the starting sequence of the photovoltaic unit₁The possible fluctuation range of the active power of the photovoltaic unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the starting sequence of the photovoltaic unit is obtained₁In which u is ordered₁The upper limit of the range of (a) is equal to the upper limit of the possible fluctuation range of the active power of the photovoltaic power supply unit obtained in S3130 plus the sequence u in the starting sequence of the photovoltaic unit₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁The lower limit of the range is equal to the lower limit of the possible fluctuation range of the active power of the photovoltaic power supply unit obtained in S3130 plus the sequence u in the starting sequence of the photovoltaic unit₁The lower limit of the possible fluctuation range of the active power of the unit;

s3313) determination of u₁Whether it is equal to the starting sequence length of the photovoltaic unit, if u₁If the length of the starting sequence of the photovoltaic set is equal to the length of the starting sequence of the photovoltaic set, the step S3310 is terminated, otherwise, u is executed₁＝u₁+1, and then continuing to perform the subsequent steps;

s3314) sorting u in the possible fluctuation range sequence of the active power corresponding to the starting sequence of the photovoltaic unit₁Range of-1, plus photovoltaic moduleOrdering u in machine sequence₁The possible fluctuation range of the active power of the photovoltaic unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the starting sequence of the photovoltaic unit is obtained₁In which u is ordered₁Is equal to the rank u₁Upper limit of range of-1 plus sequence u in the photovoltaic set startup sequence₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁Is equal to the rank u₁-1 lower limit of range plus the sequence u in the photovoltaic set startup sequence₁The lower limit of the possible fluctuation range of the active power of the unit;

s3315) jumping to step S3313 until u₁Equal to the length of the startup sequence of the photovoltaic set, and ends S3310.

E.g. future T₁The possible fluctuation range of the active power of the photovoltaic power supply unit in time is 310-360 MW, and the photovoltaic starting sequence is No. 1 machine, No. 5 machine and No. 6 machine]Wherein, the possible fluctuation range of the active power of the photovoltaic 1, 5, 6, and the number machine is 20 to 25, 30 to 40, 25 to 40, and the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence is [ (330,385), (360,425), (385,465)]。

S3320) respectively generating possible active power fluctuation range sequences corresponding to the shutdown sequences aiming at the photovoltaic units, wherein the possible active power fluctuation range sequences comprise:

s3321) setting variable u₂，u₂Is 1;

s3322) subtracting the possible fluctuation range of the active power of the photovoltaic power supply unit obtained in S3130 from the sequence u in the photovoltaic shutdown sequence₂The possible fluctuation range of the active power of the photovoltaic unit is obtained, and the order u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic shutdown sequence is obtained₂In which u is ordered₂Is equal to the upper limit of the possible fluctuation range of the active power of the photovoltaic power supply unit obtained in S3130 minus the sequence u in the photovoltaic shutdown sequence₂The upper limit of the possible fluctuation range of the active power of the photovoltaic unit is sorted u₂Is equal to the lower limit of the possible fluctuation range of the active power of the photovoltaic power supply unit obtained in S3130 minus the sequence u in the photovoltaic shutdown sequence₂Photovoltaic machineThe lower limit of the possible fluctuation range of the active power of the group;

s3323) judgment of u₂Whether it is equal to the photovoltaic shutdown sequence length, if u₂Equal to the photovoltaic shutdown sequence length, terminate step S3320, otherwise execute u₂＝u₂+1, and then continuing to perform the subsequent steps;

s3324) sorting u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic shutdown sequence₂Range of-1, minus the order u in the photovoltaic shutdown sequence₂The possible fluctuation range of the active power of the photovoltaic unit is obtained, and the order u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic shutdown sequence is obtained₂In which u is ordered₂Is equal to the rank u₂Upper limit of range of-1 minus the order u in the photovoltaic shutdown sequence₂The upper limit of the possible fluctuation range of the active power of the photovoltaic unit is sorted u₂Is equal to the rank u₂Lower bound of range of-1 minus the order u in the photovoltaic shutdown sequence₂The lower limit of the possible fluctuation range of the active power of the photovoltaic unit;

s3325) to step S3323 until u₂Equal to the photovoltaic shutdown sequence length, and ends S3320.

S3400) calculating the unit active power real-time value-emitting parameter of the photovoltaic power supply unit, including:

s3410) initially setting the active power real-emission value parameter calculation quantity of the photovoltaic power supply unit to be equal to the unit active power real-emission value;

s3420) accumulating the output dead zones of the photovoltaic power supply units which are scheduled and given or manually set to obtain the unit output dead zones of the photovoltaic power supply units;

s3430) comparing the real active power value of the photovoltaic power supply unit with the calculated quantity and the real active power value of the current photovoltaic power supply unit according to a fixed period, wherein the method comprises the following steps:

s3431) if the absolute value of the difference value of the two is less than or equal to the output dead zone of the photovoltaic power supply unit, the real output parameter of the active power of the photovoltaic power supply unit and the calculated quantity are kept unchanged;

s3432) if the absolute value of the difference value of the two is larger than the output dead zone of the photovoltaic power supply unit, the active power real-time value parameter calculation amount of the photovoltaic power supply unit is equal to the current active power real-time value of the photovoltaic power supply unit.

For example, the dead zone of the output of the photovoltaic power supply unit is 20MW, the real active power value of the photovoltaic power supply unit is 300MW both in the calculated quantity and the real active power value of the unit, the real power value of the unit is changed into 305MW due to power fluctuation, the absolute value of the difference value between the real power value of the photovoltaic power supply unit and the calculated quantity 300MW and the real power value of the unit 305MW is 5MW which is smaller than the dead output zone 20MW, therefore, the real active power parameter of the photovoltaic power supply unit keeps 300MW unchanged, and later, due to further power fluctuation, the real unit active power parameter changes to 321MW, so that the absolute value of the difference value between the real active power parameter of the photovoltaic power supply unit 300MW and the real unit active power parameter 321MW changes to 21MW, which is larger than the output dead zone 20MW, therefore, the active power real-emitting value of the photovoltaic power supply unit is changed into 321MW according to the unit active power real-emitting value.

S3500) calculating the unit active power real-emitting value of the photovoltaic power supply unit and the calculated value of the filtered value, wherein the method comprises the following steps:

s3510) initially setting the active power real-time value of the photovoltaic power supply unit and the calculated amount filtering value to be equal to the unit active power real-time value;

s3520) calculating a filtering threshold of an active power real-time value of the photovoltaic power supply unit, comprising the following steps:

s3521) setting a scaling coefficient lambda, lambda is larger than 1;

s3522) the filtering threshold of the active power real output value of the photovoltaic power supply unit is equal to the unit output dead zone multiplied by λ in S3420, and in this embodiment, if λ is 3, the filtering threshold is equal to 3 times of the unit output dead zone.

S3530) comparing the real active power value of the photovoltaic power supply unit with the calculated value of the filter and the real active power value of the current photovoltaic power supply unit according to a fixed period, and the method comprises the following steps:

s3531) if the absolute value of the difference value of the two is less than or equal to the filtering threshold obtained in S3522, the active power actual value parameter of the photovoltaic power supply unit and the filtering value of the calculated value are kept unchanged;

s3532) if the absolute value of the difference value of the real power sending value and the absolute value of the difference value is larger than the filtering threshold obtained in S3522, the real power sending value of the photovoltaic power supply unit is equal to the real power sending value of the current photovoltaic power supply unit.

S3600) calculating a unit primary frequency modulation target regulating quantity of a photovoltaic power supply unit, including:

s3610) calculating the frequency deviation of the power grid, wherein the frequency deviation of the power grid is equal to the subtraction of the rated frequency (50Hz) of the power grid from the real-time frequency of the power grid;

s3620) if the absolute value of the power grid frequency deviation is smaller than or equal to a primary frequency modulation threshold (given by scheduling), the primary frequency modulation target regulating quantity of the unit of the photovoltaic power supply unit is equal to 0;

s3630) if the absolute value of the grid frequency deviation is larger than a primary frequency modulation threshold, the primary frequency modulation target regulating quantity of the unit of the photovoltaic power supply unit is equal to the real power value of the photovoltaic power supply unit multiplied by the grid frequency deviation and then multiplied by a photovoltaic primary frequency modulation regulating coefficient (grid given parameter).

S4000), the complementary integrated unit distributes the unit active power target value of the conventional power supply unit, sets the primary frequency modulation adjusting coefficient of the conventional power supply unit, and calculates the start-stop operation suggestion of the photovoltaic power supply unit to meet the adjusting requirements of the complementary integrated power supply total active power set value and the primary frequency modulation, the control model is shown in figure 1, in order to visually display the adjusting effect, the influence of the primary frequency modulation is eliminated in the control model, but technicians in the industry can easily know that even though the conventional power supply is introduced to the primary frequency modulation of the complementary integrated power supply and the primary frequency modulation response of the photovoltaic power supply, the implementation effect of the method can not be influenced, and the method comprises the following steps:

regulation of the conventional power supply unit:

s4100) calculating a unit active power target value of the conventional power supply unit, wherein the unit active power target value is equal to a calculated quantity of a unit active power real value of the photovoltaic power supply unit obtained by subtracting the S3400 from a total active power set value of the complementary integrated power supply;

s4200) active power regulation is carried out on each single closed-loop unit of the conventional power supply unit, and the method comprises the following steps:

s4210) the complementary integration unit calculates a primary frequency modulation adjustment coefficient of the conventional power supply unit, and the method comprises the following steps:

s4211) calculating a primary frequency modulation scaling coefficient of the conventional power supply unit by the complementary integration unit, wherein the primary frequency modulation scaling coefficient is equal to (active power rated capacity of the photovoltaic power supply unit + active power rated capacity of the conventional power supply unit) ÷ active power rated capacity of the conventional power supply unit, and if the active power rated capacity of the conventional power supply unit is 200MW and the active power rated capacity of the photovoltaic power supply unit is 100MW, the primary frequency modulation scaling coefficient of the conventional power supply unit is (200+100)/200 ═ 1.5;

s4212) calculating a primary frequency modulation adjustment coefficient of the conventional power supply unit by the complementary integration unit, wherein the primary frequency modulation adjustment coefficient is equal to a primary frequency modulation scaling coefficient obtained by multiplying the primary frequency modulation adjustment coefficient of the conventional power supply unit issued by a power grid by the S4211;

s4213) when each unit of the conventional power supply unit actually performs primary frequency modulation, performing adjustment according to the primary frequency modulation adjustment coefficient obtained in S4212, and assuming that when a certain specific deviation occurs in the grid frequency, the primary frequency modulation adjustment amount of a unit of the conventional power supply unit is 40MW originally, according to S4211, in order to undertake the primary frequency modulation task of the photovoltaic power supply, the primary frequency modulation adjustment amount of the unit is amplified to 40 × 1.5 — 60 MW.

S4220) the conventional power supply unit corrects the single AGC active power distribution value of the hydroelectric generating set which is put into AGC according to the S2500 method, wherein the primary frequency modulation adjusting coefficient obtained in the S4212 is used when the primary frequency modulation related parameters are calculated;

s4230) performing active power regulation on each single closed-loop unit by the conventional power supply unit according to the method of S2600, wherein the primary frequency modulation regulation coefficient obtained in the step S4212 is used when primary frequency modulation related parameters are calculated.

Regulation of the photovoltaic power supply unit:

s4300) calculating future T₁Unit active power accommodation range of photovoltaic power supply unit in time, wherein T₁For the artificial setting parameters described in S3100, including:

s4310) calculating future T₁Photovoltaic power at each time point in timeThe lower limit of the unit active power accommodation range or the lower limit of each continuous interval of the accommodation range of the source unit comprises:

s4311) if the scheduling issues the active power plan curve of the complementary integrated power supply in advance, the future T is determined₁Subtracting the S2260 from the total active power set value of the complementary integrated power supply at each time point in time to obtain the upper limit of the joint operation area of the conventional power supply unit (in the case that the joint operation area only includes one continuous interval) or the upper limit of each continuous interval of the joint operation area (in the case that the joint operation area includes multiple continuous intervals), which is the future T₁The lower limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time (under the condition that the combined operation area only comprises one section of continuous interval) or the lower limit of each continuous interval of the accommodation range (under the condition that the combined operation area comprises a plurality of sections of continuous intervals);

s4312) if the active power plan curve of the complementary integrated power supply is not issued in advance in the scheduling, subtracting the upper limit of the joint operation area of the conventional power supply unit (under the condition that the joint operation area only comprises one section of continuous area) or the upper limit of each continuous section of the joint operation area (under the condition that the joint operation area comprises a plurality of sections of continuous sections) obtained by subtracting the S2260 from the total active power set value of the current complementary integrated power supply, namely the upper limit of the joint operation area of the conventional power supply unit (under the condition that the joint operation area only comprises one section of continuous sections), namely the upper limit of the T-shaped power supply unit in the future₁The lower limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time (under the condition that the combined operation area only comprises one section of continuous interval) or the lower limit of each continuous interval of the accommodation range (under the condition that the combined operation area comprises a plurality of sections of continuous intervals);

s4320) calculating future T₁The photovoltaic power supply unit's of each time point in time unit active power holds the upper limit of the range or holds each continuous interval upper limit of the range, includes:

s4321) if the scheduling issues the active power plan curve of the complementary integrated power supply in advance, the future T is determined₁Subtracting the S2260 from the total active power set value of the complementary integrated power supply at each time point in time to obtain a lower limit of a joint operation area of the conventional power supply unit (in the case that the joint operation area only includes one continuous interval) or a lower limit of each continuous interval of the joint operation area (in the case that the joint operation area includes multiple continuous intervals), which is the future T₁Within a period of timeThe upper limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point (under the condition that the combined operation area only comprises one section of continuous interval) or the upper limit of each continuous interval of the accommodation range (under the condition that the combined operation area comprises a plurality of sections of continuous intervals);

s4322) if the active power plan curve of the complementary integrated power supply is not issued in advance in the scheduling, subtracting the lower limit of the joint operation area of the conventional power supply unit (under the condition that the joint operation area only comprises one section of continuous area) or the lower limit of each continuous section of the joint operation area (under the condition that the joint operation area comprises a plurality of sections of continuous sections) obtained by subtracting the S2260 from the total active power set value of the current complementary integrated power supply, namely the lower limit of the T-shaped continuous section of the future₁The upper limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time (under the condition that the combined operation area only comprises one section of continuous interval) or the upper limit of each continuous interval of the accommodation range (under the condition that the combined operation area comprises a plurality of sections of continuous intervals);

s4330) future T₁The unit active power accommodation range of the photovoltaic power supply unit in time is T in the future₁The unit active power accommodation ranges of the photovoltaic power supply units at all time points in time are intersected, the range can be a continuous range or a plurality of continuous ranges, and future T is assumed₁The total active power set value is gradually reduced from 900MW to 800MW and gradually increased to 1000MW within the time, wherein the total active power set values at certain time points are 900, 850, 800, 950 and 1000MW respectively, the joint operation area of the conventional power supply unit is (300,600) U (700,950), and then T is T in the future₁The unit active power accommodation ranges of the photovoltaic power supply units at each time point in time are (-50,200) U (300,600), (-100,150) U (250,550), (-150,100) U (200,500), (0,250) U (350,650), (50,300) U (400,700), and intersection is obtained for the above ranges to obtain future T₁The unit active power accommodation range of the photovoltaic power supply unit over time is (50,100) U (400,500).

S4400) calculating the starting and stopping state and the future T of the current photovoltaic power supply unit set₁The step of quantizing the mismatch degree of the total active power set value of the complementary integrated power supply within the time and the subsequent steps of S4500 and S4600The logic is shown in FIG. 5 and includes:

s4410) calculating the future T obtained in S4330₁Each continuous interval (one or more continuous intervals forming the accommodation range) and the future T contained in the unit active power accommodation range of the photovoltaic power supply unit in time₁The upper limit mismatching degree of the possible fluctuation range of the active power of the photovoltaic power supply unit in time is obtained from the future T obtained from S3131₁The future T obtained by respectively subtracting S4330 from the upper limit of the possible fluctuation range of the active power of the photovoltaic power supply unit in time₁Judging the upper limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, and respectively judging the calculation result, wherein if the upper limit is greater than 0, the upper limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the upper limit mismatching degree is equal to 0;

s4420) calculating future T obtained in S4330₁Each continuous interval (one or more continuous intervals forming the accommodation range) and the future T contained in the unit active power accommodation range of the photovoltaic power supply unit in time₁The lower limit mismatching degree of the possible fluctuation range of the active power of the photovoltaic power supply unit in time is obtained from the future T obtained by S4330₁The future T obtained by respectively subtracting S3132 from the lower limit of each continuous interval contained in the unit active power accommodating range of the photovoltaic power supply unit in time₁Respectively judging the calculation results at the lower limit of the possible fluctuation range of the active power of the photovoltaic power supply unit within the time, if the lower limit is larger than 0, the lower limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the lower limit mismatching degree is equal to 0;

s4430) future T obtained according to S4330₁In the one-to-one correspondence relationship of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, the lower limit mismatching degree of each continuous interval obtained by S4420 is subtracted from the upper limit mismatching degree of each continuous interval obtained by S4410, absolute values of all results are obtained, the minimum value is obtained from the absolute values of all results, and the on-off state of the current photovoltaic power supply unit and the future T-time T-T-time T-T₁Quantization of mismatch of total active power set-point of complementary integrated power supply over time, e.g. S4330 yields future T₁Of photovoltaic power supply units over timeThe unit active power accommodation range is (50,100) U (400,500), assuming future T₁The possible fluctuation range of the active power of the photovoltaic power supply unit in time is (200,250), and the degree of mismatch between the upper limit and two continuous intervals of the unit active power accommodation range is max [0, 250-]＝150、max[0,250－500]0, and max [0, 50-200 ] as the lower limit mismatch]＝0、max[0,400－200]And (5) subtracting the lower limit mismatch degree from the upper limit mismatch degree of the two continuous intervals and taking absolute values as 150 and 200 respectively, so that the quantized value of the mismatch degree is equal to the minimum value of the two results, namely the quantized value of the mismatch degree is equal to 150.

S4500) finding an operation recommendation for shutting down the photovoltaic power generating unit, and finding an operation recommendation for shutting down the photovoltaic power generating unit, where the photovoltaic power generating unit includes:

s4510) manually setting a judgment threshold parameter for the suggested shutdown operation;

s4520) set variable v₃，v₃Is 1;

s4530) if v₃If the length of the stop sequence of the photovoltaic unit is less than or equal to the length of the stop sequence of the photovoltaic unit, setting an original mismatching degree quantized value variable, wherein the original mismatching degree quantized value variable is equal to the mismatching degree quantized value obtained in the S4430, and otherwise, skipping to the step S4560;

s4540) calculating sequence v in possible active power fluctuation range sequence corresponding to photovoltaic unit shutdown sequence₃Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4541) calculating future T obtained in S4330₁Sequencing v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the photovoltaic unit from each continuous interval (one or more continuous intervals forming the accommodation range) contained in the unit active power accommodation range of the photovoltaic power supply unit in time to the possible fluctuation range sequence of the active power₃The upper limit mismatching degree of the range, and sorting v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the photovoltaic unit₃Respectively subtracting S4330 from the upper limit of the range to obtain the future T₁Each continuous zone comprised by the unit active power accommodation range of the photovoltaic power supply unit within timeJudging the upper limit of the interval, respectively judging the calculation results, if the upper limit of the interval is greater than 0, determining that the upper limit mismatching degree of the continuous interval is equal to the calculation results, otherwise, determining that the upper limit mismatching degree is equal to 0;

s4542) calculating future T obtained in S4330₁Sequencing v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the photovoltaic unit from each continuous interval (one or more continuous intervals forming the accommodation range) contained in the unit active power accommodation range of the photovoltaic power supply unit in time to the possible fluctuation range sequence of the active power₃The lower limit mismatch of the range of (3) will be the future T obtained at S4330₁In time, sequencing v in the possible fluctuation range sequence of active power corresponding to the shutdown sequence of the photovoltaic unit is respectively subtracted from the lower limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit₃Respectively judging the calculation results, if the lower limit is greater than 0, the lower limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the lower limit mismatching degree is equal to 0;

s4543) future T as obtained with S4330₁In the one-to-one correspondence relationship of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, the lower limit mismatching degree of each continuous interval obtained by subtracting the lower limit mismatching degree of each continuous interval obtained by S4542 from the upper limit mismatching degree of each continuous interval obtained by S4541, absolute values of all results are obtained, the minimum value is obtained from the absolute values of all results, and the sorting v in the possible active power fluctuation range sequence corresponding to the shutdown sequence of the photovoltaic unit is obtained₃Range and future T of₁And complementing the mismatch quantization value of the total active power set value of the integrated power supply within the time.

S4550) subtracting the quantization value of mismatch degree obtained in S4543 from the original quantization value variable of mismatch degree, and performing the following operations according to the calculation result, including:

s4551) if the calculation result is equal to or greater than the judgment threshold parameter set in S4510, v₃＝v₃+1 if v is present at this time₃If the length of the shutdown sequence of the photovoltaic unit is larger than the length of the shutdown sequence of the photovoltaic unit, jumping to a step S4560, otherwise, updating the original mismatching degree quantized value variable into the mismatching degree quantized value obtained in the step S4543, and jumping to a step S4540 to continue execution;

s4552) if the calculation result is less than the judgment threshold parameter set in S4510, jumping to step S4560 to continue execution.

S4560) according to variable v₃Generates an operation recommendation, comprising:

s4561) if v₃If 1, no operation suggestion is generated;

s4562) if v₃If the number of the photovoltaic units is more than 1, generating a shutdown operation suggestion, and sequencing 1 to v in a shutdown sequence of the photovoltaic units according to the suggestion₃-1 the corresponding photovoltaic unit performs shutdown operation.

S4600) find an operation recommendation for powering on an available and non-generating photovoltaic module, and find an operation recommendation for powering on an available and non-generating photovoltaic module, where the photovoltaic module includes:

s4610) manually setting judgment threshold parameters for recommending startup operation;

s4620) set variable v₄，v₄Is 1;

s4630) if v₄If the length of the photovoltaic startup sequence is less than or equal to the length of the photovoltaic startup sequence, setting an original mismatching degree quantization value variable, wherein the original mismatching degree quantization value variable is equal to the mismatching degree quantization value obtained in S4430, otherwise, skipping to the step S4660;

s4640) calculating the sequence v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence₄Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4641) calculating the future T obtained in S4330₁Sequencing v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence in each continuous interval (one or more continuous intervals forming the accommodation range) contained in the unit active power accommodation range of the photovoltaic power supply unit in time₄The upper limit mismatching degree of the range, and sorting v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence₄Respectively subtracting S4330 from the upper limit of the range to obtain the future T₁The upper limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time is calculated respectivelyJudging, if the upper limit mismatching degree of the continuous interval is larger than 0, the upper limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the upper limit mismatching degree is equal to 0;

s4642) calculating the future T obtained in S4330₁Sequencing v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence in each continuous interval (one or more continuous intervals forming the accommodation range) contained in the unit active power accommodation range of the photovoltaic power supply unit in time₄The lower limit mismatch of the range of (3) will be the future T obtained at S4330₁In time, sequencing v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence is respectively subtracted from the lower limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit₄Respectively judging the calculation results, if the lower limit is greater than 0, the lower limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the lower limit mismatching degree is equal to 0;

s4643) future T as obtained with S4330₁In the one-to-one correspondence relationship of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, the lower limit mismatching degree of each continuous interval obtained by subtracting the lower limit mismatching degree of each continuous interval obtained by S4642 from the upper limit mismatching degree of each continuous interval obtained by S4641 is respectively taken, the absolute value of all results is taken, the minimum value is taken from the absolute values of all results, and the sequencing v in the possible active power fluctuation range sequence corresponding to the photovoltaic startup sequence is obtained₄Range and future T of₁And complementing the mismatch quantization value of the total active power set value of the integrated power supply within the time.

S4650) subtracting the quantization value of mismatch from S4643 from the original quantization value of mismatch, and performing the following operations according to the calculation result, including:

s4651) if the calculation result is equal to or greater than the judgment threshold parameter set in S4610, v is₄＝v₄+1 if v is present at this time₄If the length of the photovoltaic startup sequence is larger than the length of the photovoltaic startup sequence, jumping to step S4660, otherwise, updating the original mismatch quantization value variable to the mismatch quantization value obtained in step S4643, and jumping to step S4640 to continue execution;

s4652) if the calculation result is less than the judgment threshold parameter set in S4610, it jumps to step S4660 to continue execution.

S4660) according to the variable v₄Generates an operation recommendation, comprising:

s4661) if v₄If 1, no operation suggestion is generated;

s4662) if v₄If the number of the photovoltaic power-on sequences is more than 1, generating a power-on operation suggestion, and ranking 1 to v in the photovoltaic power-on sequence according to the suggestion₄The photovoltaic unit corresponding to the-1 executes the starting operation.

S4700) generating operation suggestions for assisting operators in making decisions, comprising:

s4710) classifying the operation suggestions generated in the step S2300, and orderly displaying the operation suggestions according to the priority (when more than 1 operation suggestion of a certain type);

s4720) orderly displaying the shutdown operation suggestions of the photovoltaic units generated in the S4500, and sending the shutdown operation suggestions to the photovoltaic power supply units;

s4730) orderly displaying the startup operation suggestions of the photovoltaic unit generated in S4600, and sending the startup operation suggestions to the photovoltaic power supply unit.

Assuming that the total active power set value of the complementary integrated power supply is changed from 300MW to 400MW at 70s, the active power target value of the conventional power supply unit is born by each of the hydroelectric generating set and the thermal generating set by 50%, and the hydroelectric generating set dynamically compensates for the secondary frequency modulation process of the thermal generating set, the adjusting effect of the complementary integrated power supply in the control model shown in fig. 1 is shown in fig. 6, and the conventional power supply cannot play an obvious role in compensating for the random fluctuation of the output power of the photovoltaic power supply in a short time, but can effectively suppress the large deviation of the real active power value of the unit of the photovoltaic power supply.

The present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.

Claims

1. A control method for suppressing active power fluctuation of photovoltaic and conventional energy networking is characterized in that a complementary integrated power centralized control center is used for carrying out coordination control on conventional energy and photovoltaic energy:

the complementary integration unit sets the primary frequency modulation adjustment coefficient of the conventional power supply unit as follows: multiplying a primary frequency modulation regulation coefficient of a conventional power supply unit issued by a power grid by a primary frequency modulation scaling coefficient; the primary frequency modulation scaling coefficient is equal to (rated capacity of active power of the photovoltaic power supply unit + rated capacity of active power of the conventional power supply unit) ÷ rated capacity of active power of the conventional power supply unit;

the conventional power supply unit obtains a conventional power supply control intermediate parameter according to basic parameters of a conventional power supply including water power and firepower, sends the conventional power supply control intermediate parameter to the complementary integrated unit, and performs conventional power supply unit-level AGC distribution and unit active power closed-loop regulation according to a received unit active power target value and a primary frequency modulation regulation coefficient to generate an operation suggestion of the conventional power supply unit;

2. The control method for suppressing active power fluctuation for photovoltaic and conventional energy networking according to claim 1, wherein the parameters obtained by the complementary integration unit include:

s1100), parameters input by a complementary integration unit:

s1112) the active power rated capacity of the complementary integrated unit is equal to the sum of the single-machine active power rated capacities of the conventional power supply unit and the photovoltaic power supply unit of each unit which is generating electricity;

s1113) the real active power value of the complementary integrated unit is equal to the sum of the real active power values of the single machines of the conventional power supply unit and the photovoltaic power supply unit;

s1120) input parameters transmitted by the regular power supply unit:

s1122) a unit joint operation area of the conventional power supply unit;

s1130) input parameters sent by the photovoltaic power supply unit:

s1134), a starting sequence and a stopping sequence of the photovoltaic power supply unit, and active power possible fluctuation range sequences respectively corresponding to the starting sequence and the stopping sequence;

3. The control method for suppressing active power fluctuation of photovoltaic and conventional energy networking according to claim 1, wherein the operation of the conventional power supply unit comprises:

s2100) determining a unit type of the conventional power supply unit:

s2120) according to the difference of the active power regulation controlled state of the generator set, dividing a single machine open loop unit, a single machine closed loop unit, a unit which is put into AGC, and a unit which is not put into AGC;

s2200) establishing a combined output model for each unit of AGC, calculating a combined operation area, a combined recommended operation area and a combined restricted operation area, and determining the current single-machine AGC active power distribution value of each unit;

s2300) comparing the unit active power target value of the conventional power supply with the unit combined operation area, wherein when the unit active power target value is included in the unit combined operation area, the unit active power target value is feasible; when the unit active power target value is not included in the unit combined operation area, the unit active power target value is not feasible, and an operation suggestion enabling the unit active power target value to be feasible is searched; classifying the generated running operation suggestions, and displaying the running operation suggestions in order according to the obtained priority;

s2400) calculating a single AGC active power distribution value which is put into an AGC unit: calculating the unit AGC active power distribution value of the conventional power supply, and starting a unit-level AGC distribution process of the conventional power supply when the conditions are met; then determining a target distribution combination mode of the AGC unit and determining a target output combination mode of the AGC unit; according to a target output combination mode of the input AGC units, AGC active power distribution is carried out on the input AGC units;

s2500) dynamically compensating the secondary frequency modulation performance of the thermal power generating unit by the hydroelectric generating unit, and correcting the single-machine AGC active power distribution value of the hydroelectric generating unit which is put into AGC to obtain a single-machine AGC active power correction distribution value;

s2600) active power regulation of each single closed-loop unit of the conventional power supply unit:

s2610) determining the single machine active power set value of each single machine closed loop unit;

s2620) superposing the single-machine active power set value and the primary frequency modulation correction of each single-machine closed-loop unit of the conventional power supply unit to obtain a single-machine active power execution value of each unit;

4. The control method for suppressing active power fluctuation for photovoltaic and conventional energy networking according to claim 3, wherein the steps of the conventional power supply unit operation specifically include the following operations:

s2200) the step of establishing a combined output model for each unit of the AGC, and calculating a combined operation area, a combined recommended operation area and a combined restricted operation area comprises the following operations:

s2210) determining a single machine suggested operation area, a single machine limited operation area, a single machine forbidden operation area and a single machine operation area which are put into each unit of the AGC:

s2211) a single machine operation forbidding area refers to a load area for forbidding the single machine active power set value of the unit to be set in the load area; the real value of the single-machine active power of the unit is allowed to pass through or pass through the single-machine forbidden operation area, but is not allowed to reside or stay in the single-machine forbidden operation area for a long time;

s2212) a single machine suggested operation area is a load area with high unit operation efficiency and stable operation when the real single machine active power value of the unit is in the middle; under the condition that the conditions allow, the single machine active power set value of the unit is preferably set in a single machine suggested operation area;

s2213) a stand-alone limited operation area, and when the total active power set values of all the given units cannot meet the condition that the stand-alone active power set values of all the units are in the stand-alone recommended operation area no matter how the total active power set values are distributed, the stand-alone active power set values of the units are allowed to be set in the stand-alone limited operation area;

s2215) the low-load area of the thermal power unit is a single-machine forbidden operation area, the single-machine forbidden operation area of the thermal power unit is about 0-50% of rated capacity, and the rest part of the rated capacity minus the single-machine forbidden operation area is a single-machine suggested operation area;

s2216) adopting the conventional operation parameters of the hydroelectric generating set within the range of a single machine limited operation area, a single machine forbidden operation area and a single machine recommended operation area of the hydroelectric generating set;

s2217) after the single machine rated capacity of the conventional power supply unit deducts the single machine forbidden operation area and the single machine limited operation area, the rest parts are single machine suggested operation areas, and the single machine rated capacity of the hydroelectric generating set changes along with the real-time water head change of the hydropower station;

s2220) establishing a suggested combined output model of the unit which is put into the AGC, and calculating a combined suggested operation area which is put into the AGC unit:

s2222) grouping proposal operation area of each group of units under various proposal distribution modes: determining a recommended distribution mode according to the number of the single-machine recommended operation areas and the number of the units of each group of units, and then calculating the grouping recommended operation areas of each group of units in each recommended distribution mode;

s2223) aiming at all the units which are put into AGC, calculating the combined recommended operation areas which are respectively and correspondingly put into the AGC units when the units are in various recommended distribution modes and are combined in different modes according to different distribution modes of the units in a single machine recommended operation area and the corresponding grouped recommended operation areas of the units;

s2225) determining available recommended distribution combination modes of the input AGC unit in each output interval in the combined recommended operation area according to the combined recommended operation area of the input AGC unit in each recommended distribution combination mode obtained in S2223;

s2231) grouping the units which are put into AGC;

s2232) calculating the grouping operation area of each group of units in various distribution modes according to the distribution condition of the output of each group of units in each single-machine operation area;

s2233) calculating the combined operation areas of the AGC units corresponding to each group in various distribution modes and different modes when the groups are combined according to different distribution modes of each group in a single machine operation area and the corresponding group operation area of each group, aiming at all the AGC units;

s2234) calculating a combined operation area and a combined limited operation area which are put into the AGC unit: obtaining a union set of combined operation areas of the AGC unit obtained in the step S2233 in all distributed combination modes to obtain a combined operation area of the AGC unit, and then deducting a combined recommended operation area obtained in the step S2224 from the combined operation area of the AGC unit to obtain a combined restricted operation area of the AGC unit;

s2235) determining available distribution limiting combination modes of the input AGC units in each output interval in the combined limiting operation area according to the combined operation area of the input AGC units in various distribution combination modes obtained in S2233: sorting the upper limit and the lower limit of the combined operation area corresponding to each distribution combination mode obtained in the step S2233, then dividing the combined limited operation area which is fed into the AGC unit and is obtained in the step S2234 according to the sorted upper limit and lower limit to obtain a plurality of output intervals, and then comparing each output interval with the combined operation area corresponding to each distribution combination mode which is fed into the AGC unit to obtain an available limited distribution combination mode under each output interval;

s2243) for the stand-alone open-loop unit which is not put into the AGC, the stand-alone AGC active power distribution value tracks the stand-alone active power set value, and the stand-alone active power set value is assigned by the stand-alone active power real value; when the single-machine active power set value is not equal to the single-machine active power real sending value and the absolute value of the difference between the single-machine active power set value and the single-machine active power real sending value is larger than the single-machine active power regulation dead zone, writing the single-machine active power real sending value into the single-machine active power set value;

s2250) adding the joint suggestion operation area obtained in S2224 into the unit AGC active power distribution value of all stand-alone AGC units which are not put into the AGC unit to obtain a unit joint suggestion operation area of the conventional power supply;

s2260) adding the single-machine AGC active power distribution values which are obtained in the step S2234 and are not added into the AGC unit into the combined operation area of the AGC unit to obtain a unit combined operation area of the conventional power supply;

s2270) adding the combined limited operation area of the AGC unit obtained in the step S2234 and the distribution values of the active power of all the stand-alone AGC units which are not put into the AGC unit to obtain a unit combined limited operation area of the conventional power supply;

s2300) comparing the unit active power target value of the conventional power supply with the unit combined operation area in the S2260, and skipping the rest step of the S2300 if the unit active power target value is feasible when the unit active power target value is included in the unit combined operation area; when the unit active power target value is not included in the unit joint operation area and the unit active power target value is not feasible, searching an operation proposal for enabling the unit active power target value:

s2321) setting a loop variable i₁，i₁Is set to 1;

s2324) C (j) listed respectively as S2323₁,i₁) The combination mode is to assume the units selected by various modes and not put into AGC as the unitsInputting AGC, calculating a unit joint operation area and a unit joint recommended operation area by adopting the S2200 method again, and then judging the feasibility of the unit active power target value again according to the newly calculated unit joint operation area;

s2325) according to the calculation result of S2324, if the unit active power target value is feasible by the unit joint operation zone regenerated in only 1 mode, generating an operation proposal; if the unit active power target value can be enabled by the unit joint operation zone regenerated in multiple ways, respectively generating operation suggestions according to the ways, and jumping to the step S2326 to continue executing; if the unit active power target value is feasible without the unit joint operation zone regenerated in any way, i₁＝i₁+1, then go to step S2322 for i₁Judging whether the number of the units not put into the AGC is larger than that of the units not put into the AGC, and determining whether to execute the subsequent steps or not according to the judgment result;

s2326) carrying out priority ordering on the plurality of operation suggestions generated in the S2325 according to the condition that the operation suggestions are respectively and correspondingly selected from the unit which is not put into AGC₁The combination mode of the unit and the changed unit joint operation area and unit joint recommended operation area range respectively corresponding to each operation proposal obtained in S2325;

s2331) setting a circulation variable i₂，i₂Is set to 1;

s2332) pairs of i₂Making a judgment if i₂If the number of the units which are available and do not generate electricity is larger than the number of the units which are available and do not generate electricity, the step S2330 is terminated, otherwise, the following steps are continuously executed to search for the unit i₂The unit which can be used by the station and does not generate power is converted into a power generation state and is put into AGC to make the unit active power target value of the conventional power supply feasible;

s2333) enumerating the selection of i from all available and unenergized units₂All combinations of stages, C (j)₂,i₂) A seed, itMiddle j₂The number of units which are available and not generating electricity;

s2334) C (j) listed according to S2333, respectively₂,i₂) A combination mode is adopted, available and non-generating units selected by various modes are assumed to be in a generating state and are put into AGC, a unit joint operation area and a unit joint suggested operation area are recalculated, and then the feasibility of the unit active power target value is judged again according to the newly calculated unit joint operation area;

s2335) generating an operation proposal according to the calculation result of S2334 if the unit active power target value is feasible by the unit joint operation area regenerated in 1 way or only by the unit joint operation area regenerated in 1 way; if the unit combined operation area regenerated by multiple modes can enable the unit active power target value to be feasible, respectively generating operation suggestions according to the modes, namely converting the available and non-generating units selected by the corresponding modes into a generating state and putting the generating state into AGC (automatic gain control), and jumping to the step S2336 to continue to execute; if the unit active power target value is feasible without the unit joint operation zone regenerated in any way, i₂＝i₂+1, and then go to step S2332 for i₂Judging whether the number of the units is larger than the number of the available and non-power-generating units, and determining whether to execute the subsequent steps according to the judgment result;

s2336) carrying out priority ordering on the plurality of operation suggestions generated in the S2335 according to the condition that the operation suggestions are respectively and correspondingly selected to be i from available and non-power generation units₂A combination mode of the unit set, and a unit joint operation area and a unit joint recommended operation area range which are respectively corresponding to each operation proposal obtained in step S2334 and are changed;

s2341) setting a Loop variable i₃，i₃Is set to 1;

s2342) pairs of i₃Making a judgment if i₃If the number of the generating units is larger than the number of the generating units, S2340 is ended, otherwise, the following steps are continuously executed to find the number i of the generating units₃The table generating electricityThe unit is converted into a non-power generation state, so that the unit active power target value of the conventional power supply becomes feasible;

s2344) C (j) listed according to S2343, respectively₃,i₃) In the combined mode, the generating set selected in various modes is assumed to be in a non-generating state, a unit combined operation area and a unit combined suggested operation area are recalculated, and the feasibility of the unit active power target value is re-judged according to the newly calculated unit combined operation area;

s2345) generating an operation proposal according to the calculation result of S2344 if the unit active power target value is feasible by the unit joint operation area regenerated in 1 way or only regenerated in 1 way; if the unit combined operation area regenerated in multiple modes can enable the unit active power target value to be feasible, respectively generating operation suggestions for converting the generating set selected in the corresponding mode into a non-generating state according to the modes, and jumping to the step S2346 to continue execution; if the unit active power target value is feasible without the unit joint operation zone regenerated in any way, i₃＝i₃+1, and then go to step S2342 for i₃Judging whether the number of the units is larger than the number of the generating sets or not, and determining whether to execute the subsequent steps or not according to the judgment result;

s2346) carrying out priority ranking on the multiple operation suggestions generated in the S2345 according to the fact that the operation suggestions are selected from the generating set i correspondingly₃The combination mode of the unit set and the changed unit combined operation area and unit combined recommended operation area range respectively corresponding to each operation recommendation obtained in S2344;

s2350) classifying the operation suggestions generated by the S2320, the S2330 and the S2340, and displaying the operation suggestions in order according to the priority;

s2400) calculating a single AGC active power distribution value which is put into an AGC unit:

s2411) calculating the distribution values of the active power of all single AGC units which are not put into the AGC unit;

s2412) subtracting all single AGC active power distribution values which are not put into the AGC unit from the unit active power target value to obtain a unit AGC active power distribution value;

s2421) the sum of the active power distribution values of all the single AGC units put into the AGC unit is greater than or less than the active power distribution value of the unit AGC obtained in the S2410;

s2424) the range of a single machine active power rated capacity, a single machine forbidden operation area, a single machine limited operation area and a single machine recommended operation area of the hydropower unit with the AGC is changed due to the variation of the hydropower station head;

s2433) if more than one available distribution combination mode is obtained in S2432, further comparing the available distribution combination modes with the current distribution combination mode, selecting the distribution combination mode with the fewest number of the set passing through the single-machine forbidden operation area as the target distribution combination mode, and if a plurality of distribution combination modes are all fewest and the same number of the set passing through the single-machine forbidden operation area, all the set passing through the single-machine forbidden operation area as the target distribution combination mode;

s2443) if the target output combination modes obtained in the S2442 are more than 1, weighting the target output combination modes obtained in the S2442 and inputting the weighted target output combination modes into the bad working condition operation priority of the AGC unit, wherein the weighting mode is to accumulate and sum the bad working condition operation priorities of the units in the single-machine limited operation area, and selecting the output combination mode of which the minimum weighted number of units are in the single-machine limited operation area as the target output combination mode;

s2443) if the target output combination modes obtained in the S2443 are more than 1, selecting the output combination mode of the minimum weighting secondary unit passing through the single-machine forbidden operation area from the target output combination modes obtained in the S2443 as the target output combination mode after weighting the bad working condition operation priority of the AGC unit;

s2453) if the value to be distributed obtained in S2452 is greater than 0, calculating the absolute value of the difference between the active power distribution value of the original single AGC of each AGC unit and the upper limit of the target operation area as the single AGC distributable value; if the value to be distributed obtained in S2452 is less than 0, calculating the absolute value of the difference between the active power distribution value of the single AGC of each unit to be fed into the AGC and the lower limit of the target operation area as the single machine distributable value;

s2454) distributing the value to be distributed obtained in S2452 to each unit for feeding AGC in a manner of equal proportion to the distributable value of each unit for feeding AGC obtained in S2453, and superposing the distribution result with the active power distribution value of the original unit AGC of each unit to obtain the active power distribution value of the unit AGC of each unit for feeding AGC;

s2500) dynamically compensating the secondary frequency modulation performance of the thermal power generating unit by the hydroelectric generating unit, correcting the single-machine AGC active power distribution value of the hydroelectric generating unit which is put into AGC, and obtaining a single-machine AGC active power correction distribution value, wherein the method comprises the following steps:

s2511) calculating the increment margin of the active power distribution value of the single AGC of each hydroelectric generating set which is put into AGC obtained in S2454: the value is equal to the value obtained by subtracting the active power distribution value of the single machine AGC from the upper limit of the single machine operation area where the active power distribution value of the single machine AGC of each hydroelectric generating set is located;

s2512) calculating the reducible margin of the active power distribution value of the single AGC of each AGC-invested hydroelectric generating set obtained in S2454: the lower limit of a single machine operation area where the single machine AGC active power distribution value is subtracted from the single machine AGC active power distribution value of each hydroelectric generating set;

s2520) determining the primary frequency modulation correction quantity of each single closed-loop unit of the conventional power supply unit:

s2521) calculating a grid frequency deviation: the power grid frequency deviation is equal to the power grid rated frequency minus the power grid real-time frequency;

s2522) if the absolute value of the power grid frequency deviation is less than or equal to the unit primary frequency modulation threshold, the unit primary frequency modulation correction is equal to 0;

s2524) when the actual regulating variable of the primary frequency modulation of the unit can be measured or obtained, the correction quantity of the primary frequency modulation of the unit is equal to the actual regulating variable of the primary frequency modulation, otherwise, the correction quantity of the primary frequency modulation of the unit is equal to the target regulating variable of the primary frequency modulation of the unit obtained in the S2523;

s2531) calculating the dynamic adjustment deviation of each single closed-loop thermal power generating unit of the conventional power supply unit: adding the primary frequency modulation correction quantity obtained by adding the S2520 to the single AGC active power distribution value of each single closed-loop thermal power generating unit, and then subtracting the single active power actual value;

s2533) adding the dynamic compensation demand of all the single closed-loop thermal power generating units in the conventional power supply unit to obtain the total dynamic compensation demand of the thermal power generating unit of the conventional power supply unit;

s2541) setting a compensation scaling coefficient smaller than 1 and larger than 0 according to prior experience for calculating the total dynamic compensation amount;

s2544) comparing the result obtained by multiplying the total dynamic compensation demand of the thermal power generating unit by the compensation scaling coefficient with the total dynamic compensation of the hydroelectric generating unit according to a fixed period, and if the absolute value of the difference between the two is greater than the sum of single-machine active power adjustment dead zones of all the generating thermal power generating units, or the absolute value of the difference is equal to 0 and the difference is not equal to 0, executing the step S2540 again;

s2550) distributing the total dynamic compensation amount of the hydropower units which are put into the AGC to each hydropower unit which is put into the AGC to obtain the single machine dynamic compensation amount of each hydropower unit which is put into the AGC:

s2553) when the total dynamic compensation amount of the hydroelectric generating sets is smaller than 0, distributing the total dynamic compensation amount to each hydroelectric generating set according to the proportion of the reducible margin of each input AGC hydroelectric generating set single-machine AGC active power distribution value in the total reducible margin of the hydroelectric generating sets; the calculation mode is that the total dynamic compensation quantity is divided by the total reducible margin, and then the total reducible margin is multiplied by the reducible margin of the unit single AGC active power distribution value;

s2560) adding the single machine dynamic compensation amount of each hydroelectric generating set put into AGC obtained in S2550 and the single machine AGC active power distribution value of each generating set obtained in S2450 to obtain a single machine AGC active power correction distribution value of each hydroelectric generating set put into AGC by a conventional power supply unit;

s2610) determining the single machine active power set value of each single machine closed-loop unit:

s2613) for the hydroelectric generating set which is put into AGC, the single machine active power set value is equal to the single machine AGC active power correction distribution value obtained in S2560;

s2620) superposing the single-machine active power set value of each single-machine closed-loop unit of the conventional power supply unit and the primary frequency modulation correction value obtained in S2520 to obtain the single-machine active power execution value of each unit.

5. The control method for suppressing active power fluctuation in photovoltaic and conventional energy networking according to claim 1, wherein the operation of the photovoltaic power supply unit comprises:

s3100) generating future T for each photovoltaic unit₁Possibility of active power in timeThe fluctuation range is calculated, and the possible fluctuation range of the unit active power of the photovoltaic power supply unit is calculated, wherein T₁The method is a parameter set for reserving sufficient time for possible startup and shutdown operations of the photovoltaic unit:

s3200) generating a startup and shutdown sequence of the photovoltaic unit;

s3300) generating a possible active power fluctuation range sequence corresponding to the start-up and shut-down sequence of the photovoltaic unit;

s3400) calculating the unit active power real-time value-emitting parameter and the calculated quantity of the photovoltaic power supply unit;

s3500) calculating the unit active power real-emitting value of the photovoltaic power supply unit and the calculated value of the filtered value:

s3520) setting a filtering threshold of an active power real-sending value of the photovoltaic power supply unit;

s3530) comparing the real active power parameter of the photovoltaic power supply unit with the calculated value and the real active power value of the current photovoltaic power supply unit according to a fixed period, and keeping the real active power parameter of the unit and the calculated value unchanged or updating the real active power parameter of the unit to be the real active power value of the current photovoltaic power supply unit;

s3600) calculating a unit primary frequency modulation target regulating quantity of the photovoltaic power supply unit:

s3610) calculating the frequency deviation of the power grid;

s3620) if the absolute value of the power grid frequency deviation is smaller than or equal to a given primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity of the photovoltaic power supply unit is equal to 0;

s3630) if the absolute value of the grid frequency deviation is larger than a primary frequency modulation threshold, the primary frequency modulation target regulating quantity of the unit of the photovoltaic power supply unit is equal to the real power value of the photovoltaic power supply unit multiplied by the grid frequency deviation and then multiplied by a given photovoltaic primary frequency modulation regulating coefficient.

6. The control method for suppressing active power fluctuation of the photovoltaic and conventional energy networking according to claim 5, wherein the operation of the photovoltaic unit in each step specifically comprises:

s3100) generating future T₁And calculating the possible fluctuation range of the active power of the photovoltaic power supply unit:

s3110) if the photovoltaic unit is deployed with a power prediction system, adopting the future T of each photovoltaic unit output by the power prediction function₁The possible fluctuation range of the active power over time;

s3120) if the power prediction system is not deployed, then:

s3121) for a photovoltaic power generation installation, using the current power times an upper prediction parameter as future T₁Using the current power multiplied by a lower limit prediction parameter as the lower limit value of the possible fluctuation range of the active power, wherein the upper limit prediction parameter is more than 1 and the lower limit prediction parameter is more than 0; the upper limit prediction parameter and the lower limit prediction parameter adopt fixed values or set dynamic parameters according to prior experience, and the possible fluctuation range of the active power is along with T₁Is increased with an increase in;

s3122) for photovoltaic units which do not generate electricity, using future T of generator units which have the same or similar performance as the photovoltaic units₁The possible fluctuation range of the active power in time is used as the future T of the unit₁The possible fluctuation range of active power in time;

s3130) calculating a future T₁The unit active power of the photovoltaic power supply unit in time may fluctuate within a range: will be T in future₁Accumulating and summing the upper limits of possible fluctuation ranges of the active power of all the generator sets of the photovoltaic power supply unit within time to serve as the upper limit of the possible fluctuation ranges; will be T in future₁Accumulating and summing the lower limits of possible fluctuation ranges of the active power of all the generator sets of the photovoltaic power supply unit within the time to serve as the lower limit of the possible fluctuation ranges;

s3200) respectively generating a startup and shutdown sequence for the photovoltaic unit:

s3210) generating a shutdown sequence of the generating photovoltaic unit, wherein the priority is sorted according to the duration of the unit in the generating state, and the longer the duration in the generating state is, the higher the priority is;

s3220) generating a starting sequence of available photovoltaic units without power generation, wherein the priority is sorted according to the duration of the units in the non-power generation state, and the longer the duration of the units in the non-power generation state is, the higher the priority is;

s3300) respectively generating possible fluctuation range sequences of active power corresponding to the startup and shutdown sequences for the photovoltaic unit, including:

s3311) setting variable u₁，u₁Is 1;

s3312) adding the possible fluctuation range of the active power of the photovoltaic power supply unit to the sequence u in the photovoltaic startup sequence₁The possible fluctuation range of the active power of the unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence is obtained₁In which u is ordered₁The upper limit of the range of (a) is equal to the upper limit of the possible fluctuation range of the active power of the photovoltaic power supply unit plus the sequence u in the photovoltaic startup sequence₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁The lower limit of the range is equal to the lower limit of the possible fluctuation range of the active power of the photovoltaic power supply unit and the sequencing u in the photovoltaic starting sequence₁The lower limit of the possible fluctuation range of the active power of the unit;

s3313) determination of u₁Whether it is equal to the length of the photovoltaic power-on sequence, if u₁If the length of the photovoltaic startup sequence is equal to the length of the photovoltaic startup sequence, the step S3310 is terminated, otherwise u is executed₁＝u₁+1, and then continuing to perform the subsequent steps;

s3314) sorting u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence₁Range of-1, plus sequence u in the photovoltaic power-on sequence₁The possible fluctuation range of the active power of the photovoltaic unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence is obtained₁In which u is ordered₁Is equal to the rank u₁Upper limit of range of-1 plus the order u in the photovoltaic power-on sequence₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁Is equal to the rank u₁Lower bound of range of-1 plus the order u in the photovoltaic boot sequence₁The lower limit of the possible fluctuation range of the active power of the unit;

s3315) jumping to step S3313 until u₁Ending when the length of the photovoltaic startup sequence is equal to the length of the photovoltaic startup sequence;

s3320) respectively generating possible active power fluctuation range sequences corresponding to the shutdown sequences for the photovoltaic units comprises:

s3321) setting variable u₂，u₂Is 1;

s3322) subtracting the sequencing u in the photovoltaic shutdown sequence from the possible fluctuation range of the active power of the photovoltaic power supply unit₂The possible fluctuation range of the active power of the photovoltaic unit is obtained, and the order u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic shutdown sequence is obtained₂In which u is ordered₂Is equal to the upper limit of the possible fluctuation range of the active power of the photovoltaic power supply unit minus the sequence u in the photovoltaic shutdown sequence₂The upper limit of the possible fluctuation range of the active power of the unit is sorted u₂Is equal to the lower limit of the possible fluctuation range of the active power of the photovoltaic power supply unit minus the sequence u in the photovoltaic shutdown sequence₂The lower limit of the possible fluctuation range of the active power of the unit;

s3324) sorting u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic shutdown sequence₂Range of-1, minus the order u in the photovoltaic shutdown sequence₂The possible fluctuation range of the active power of the unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the photovoltaic shutdown sequence is obtained₂In which u is ordered₂Is equal to the rank u₂Upper limit of range of-1 minus the order u in the photovoltaic shutdown sequence₂The upper limit of the possible fluctuation range of the active power of the unit is sorted u₂Is equal to the ranku₂Lower bound of range of-1 minus the order u in the photovoltaic shutdown sequence₂The lower limit of the possible fluctuation range of the active power of the unit;

s3325) to step S3323 until u₂Ends equal to the photovoltaic shutdown sequence length;

s3400) calculating the real unit active power value parameter of the photovoltaic power supply unit, wherein the real unit active power value parameter comprises the following calculation quantity:

s3420) accumulating the output dead zones of all the units of the photovoltaic power supply unit to obtain the unit output dead zone of the photovoltaic power supply unit;

s3430) comparing the real active power value of the photovoltaic power supply unit with the calculated quantity and the real active power value of the current photovoltaic power supply unit according to a fixed period, and updating:

s3432) if the absolute value of the difference value of the two is larger than the output dead zone of the photovoltaic power supply unit, the active power real-time value participation calculation amount of the photovoltaic power supply unit is equal to the current active power real-time value of the photovoltaic power supply unit;

s3521) setting a scaling coefficient lambda, lambda is larger than 1;

s3522) the filtering threshold of the active power real output value of the photovoltaic power supply unit is equal to the unit output dead zone multiplied by lambda in S3420;

s3530) comparing the real active power value of the photovoltaic power supply unit with the calculated value of the filter and the real active power value of the current photovoltaic power supply unit according to a fixed period, and updating:

s3532) if the absolute value of the difference value of the active power real-sending value and the calculated value of the active power real-sending value of the photovoltaic power supply unit is larger than the filtering threshold obtained in S3522, the active power real-sending value of the photovoltaic power supply unit is equal to the current active power real-sending value of the photovoltaic power supply unit;

s3600) unit primary frequency modulation target regulating quantity of the photovoltaic power supply unit is as follows:

s3610) the power grid frequency deviation is equal to the power grid rated frequency minus the real-time frequency of the power grid;

s3620) if the absolute value of the power grid frequency deviation is smaller than or equal to a primary frequency modulation threshold, the primary frequency modulation target regulating quantity of the unit of the photovoltaic power supply unit is equal to 0;

s3630) if the absolute value of the grid frequency deviation is larger than a primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity of the photovoltaic power supply unit is equal to the real power value of the photovoltaic power supply unit multiplied by the grid frequency deviation and then multiplied by a photovoltaic primary frequency modulation regulating coefficient given by the grid.

7. The control method for suppressing active power fluctuation of photovoltaic and conventional energy networking according to claim 1 or 3, wherein the regulation operation of the conventional power supply unit by the complementary integrated unit comprises:

s4100) calculating a unit active power target value of the conventional power supply unit, wherein the unit active power target value is equal to a calculated amount obtained by subtracting a unit active power real value of the photovoltaic power supply unit from a total active power set value of the complementary integrated power supply; and distributes it to the conventional power supply unit;

s4200) calculating a primary frequency modulation scaling coefficient of the conventional power supply unit by the complementary integration unit, wherein the primary frequency modulation scaling coefficient is equal to (the active power rated capacity of the photovoltaic power supply unit + the active power rated capacity of the conventional power supply unit) ÷ the active power rated capacity of the conventional power supply unit;

the complementary integration unit calculates a primary frequency modulation adjustment coefficient of the conventional power supply unit, and the primary frequency modulation adjustment coefficient is equal to a primary frequency modulation scaling coefficient multiplied by a conventional power supply unit issued by a power grid;

when each unit of the conventional power supply unit executes primary frequency modulation adjustment and active power adjustment, the zoomed primary frequency modulation adjustment coefficient is used for adjusting the coefficient.

8. The control method for suppressing active power fluctuation of photovoltaic and conventional energy networking according to claim 1 or 5, wherein the adjusting operation of the photovoltaic power supply unit by the complementary integrated unit comprises:

s4300) calculating future T₁The unit active power accommodation range of the photovoltaic power supply unit within time;

s4400) calculating the starting and stopping state and the future T of the current photovoltaic power supply unit set₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4410) calculating future T₁Each continuous interval and future T contained in unit active power accommodation range of photovoltaic power supply unit in time₁The upper limit mismatching degree of the possible fluctuation range of the active power of the photovoltaic power supply unit in time is as follows: will be T in future₁Subtracting the future T from the upper limit of the possible fluctuation range of the active power of the photovoltaic power supply unit in time₁Judging the upper limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, and respectively judging the calculation result, wherein if the upper limit is greater than 0, the upper limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the upper limit mismatching degree is equal to 0;

s4420) calculating future T₁Each continuous interval and future T contained in unit active power accommodation range of photovoltaic power supply unit in time₁The lower limit mismatching degree of the possible fluctuation range of the active power of the photovoltaic power supply unit in time is as follows: will be T in future₁The future T is subtracted from the lower limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time₁Respectively judging the calculation results at the lower limit of the possible fluctuation range of the active power of the photovoltaic power supply unit within the time, if the lower limit is larger than 0, the lower limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the lower limit mismatching degree is equal to 0;

s4430) following and future T₁In the one-to-one correspondence relationship of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, the lower limit mismatching degree of each continuous interval obtained by S4420 is subtracted from the upper limit mismatching degree of each continuous interval obtained by S4410, absolute values of all results are obtained, the minimum value is obtained from the absolute values of all results, and the on-off state of the current photovoltaic power supply unit and the future T-time T-T-time T-T₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time;

s4500) finding an operation recommendation for shutting down the photovoltaic power generating unit, and finding an operation recommendation for shutting down the photovoltaic power generating unit, include:

s4510) setting a judgment threshold parameter for the suggested shutdown operation;

s4520) set variable v₃，v₃Is 1;

s4540) calculating sequence v in possible active power fluctuation range sequence corresponding to photovoltaic unit shutdown sequence₃Range and future T of₁The mismatch quantization value of the total active power set value of the complementary integrated power supply in time is as follows:

s4541) calculate future T₁Sequencing v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the photovoltaic unit in each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time₃The upper limit mismatching degree of the range, and sorting v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the photovoltaic unit₃Respectively minus the future T₁Judging the upper limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, and respectively judging the calculation result, wherein if the upper limit is greater than 0, the upper limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the upper limit mismatching degree is equal to 0;

s4542) calculating future T obtained in S4330₁Sequencing v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the photovoltaic unit in each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time₃The lower limit mismatch of the range of (1), will be T in the future₁In time, sequencing v in the possible fluctuation range sequence of active power corresponding to the shutdown sequence of the photovoltaic unit is respectively subtracted from the lower limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit₃Respectively judging the calculation results, if the lower limit is greater than 0, the lower limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the lower limit mismatching degree is equal to 0;

s4543) according to future T₁In the one-to-one correspondence relationship of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, the lower limit mismatching degree of each continuous interval obtained by subtracting the lower limit mismatching degree of each continuous interval obtained by S4542 from the upper limit mismatching degree of each continuous interval obtained by S4541, absolute values of all results are obtained, the minimum value is obtained from the absolute values of all results, and the sorting v in the possible active power fluctuation range sequence corresponding to the shutdown sequence of the photovoltaic unit is obtained₃Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time;

s4550) subtracting the quantization value of mismatch degree obtained in S4543 from the original quantization value variable of mismatch degree, and performing the following operations according to the calculation result:

s4552) if the calculation result is less than the judgment threshold parameter set in S4510, skipping to the step S4560 to continue execution;

s4561) ifv₃If 1, no operation suggestion is generated;

s4562) if v₃If the number of the photovoltaic units is more than 1, generating a shutdown operation suggestion, and sequencing 1 to v in a shutdown sequence of the photovoltaic units according to the suggestion₃-1 the corresponding photovoltaic unit executes shutdown operation;

s4600) find an operation recommendation to power on an available and non-generating photovoltaic module, and find an operation recommendation to power on an available and non-generating photovoltaic module:

s4620) set variable v₄，v₄Is 1;

s4630) if v₄If the length of the starting sequence of the photovoltaic unit is less than or equal to the length of the starting sequence of the photovoltaic unit, setting an original mismatching degree quantization value variable, wherein the original mismatching degree quantization value variable is equal to the mismatching degree quantization value obtained in the step S4430, and otherwise, skipping to the step S4660;

s4640) calculating the sequence v in the possible fluctuation range sequence of the active power corresponding to the startup sequence of the photovoltaic unit₄Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4641) calculating future T₁Sequencing v in the possible active power fluctuation range sequence corresponding to the starting sequence of the photovoltaic unit in each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time₄The upper limit mismatching degree of the range, and sorting v in the possible fluctuation range sequence of the active power corresponding to the starting sequence of the photovoltaic unit₄Respectively subtracting S4330 from the upper limit of the range to obtain the future T₁Judging the upper limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, and respectively judging the calculation result, wherein if the upper limit is greater than 0, the upper limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the upper limit mismatching degree is equal to 0;

s4642) calculating future T₁Sequencing v in the possible active power fluctuation range sequence corresponding to the starting sequence of the photovoltaic unit in each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time₄The lower limit mismatch of the range of (1), will be T in the future₁In time, the lower limit of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit is respectively subtracted by the sequence v in the possible active power fluctuation range sequence corresponding to the starting sequence of the photovoltaic unit₄Respectively judging the calculation results, if the lower limit is greater than 0, the lower limit mismatching degree of the continuous interval is equal to the calculation result, otherwise, the lower limit mismatching degree is equal to 0;

s4643) according to future T₁In the one-to-one correspondence relationship of each continuous interval contained in the unit active power accommodation range of the photovoltaic power supply unit in time, the lower limit mismatching degree of each continuous interval obtained by subtracting the lower limit mismatching degree of each continuous interval obtained by S4642 from the upper limit mismatching degree of each continuous interval obtained by S4641 respectively, absolute values of all results are obtained, the minimum value is obtained from the absolute values of all results, and the sorting v in the possible active power fluctuation range sequence corresponding to the photovoltaic unit startup sequence is obtained₄Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time;

s4650) subtracting the quantization value of mismatch S4643 from the original quantization value variable of mismatch, and performing the following operations according to the calculation result:

s4651) if the calculation result is equal to or greater than the judgment threshold parameter set in S4610, v is₄＝v₄+1 if v is present at this time₄If the length of the starting sequence of the photovoltaic unit is larger than the length of the starting sequence of the photovoltaic unit, jumping to a step S4660, otherwise, updating the original mismatching degree quantization value variable into the mismatching degree quantization value obtained by the step S4643, and jumping to a step S4640 to continue execution;

s4652) if the calculation result is smaller than the judgment threshold parameter set in S4610, jumping to step S4660 to continue execution;

s4661) if v₄If 1, no operation suggestion is generated;

s4662) if v₄If the number of the photovoltaic units is more than 1, generating a starting operation suggestion, and sequencing 1 to v in a starting sequence of the photovoltaic units according to the suggestion₄-1 executing startup of the corresponding photovoltaic unitOperating;

s4700) generating operation suggestions for assisting operators in decision making:

s4710) classifying the generated running operation suggestions of the conventional power supply units, and displaying the running operation suggestions in order according to the priority;

9. The control method for suppressing active power fluctuation in photovoltaic and conventional energy networking according to claim 8, wherein the future T is₁The calculation of the unit active power accommodation range of the photovoltaic power supply unit in time comprises the following steps:

s4310) calculating future T₁The lower limit of the unit active power accommodation range or the lower limit of each continuous interval of the accommodation range of the photovoltaic power supply unit at each time point in time is as follows:

s4311) if the scheduling issues the active power plan curve of the complementary integrated power supply in advance, the future T is determined₁Subtracting the upper limit of the joint operation area of the conventional power supply unit or the upper limit of each continuous interval of the joint operation area from the total active power set value of the complementary integrated power supply at each time point in time to obtain the future T₁The lower limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time or the lower limit of each continuous interval of the accommodation range;

s4312) if the active power plan curve of the complementary integrated power supply is not issued in advance in the scheduling, subtracting the upper limit of the joint operation area of the conventional power supply unit or the upper limit of each continuous interval of the joint operation area from the total active power set value of the current complementary integrated power supply to obtain the future T₁The lower limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time or the lower limit of each continuous interval of the accommodation range;

s4320) calculating future T₁The upper limit of the unit active power accommodation range or the upper limit of each continuous interval of the accommodation range of the photovoltaic power supply unit at each time point in time is as follows:

s4321) if the scheduling issues the active power plan curve of the complementary integrated power supply in advance, the future T is determined₁Subtracting the lower limit of the joint operation area of the conventional power supply unit or the lower limit of each continuous interval of the joint operation area from the total active power set value of the complementary integrated power supply at each time point in time to obtain the future T₁The upper limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time or the upper limit of each continuous interval of the accommodation range;

s4322) if the active power plan curve of the complementary integrated power supply is not issued in advance in the scheduling, subtracting the lower limit of the joint operation area of the conventional power supply unit or the lower limit of each continuous interval of the joint operation area obtained by S2260 from the total active power set value of the current complementary integrated power supply to obtain the future T₁The upper limit of the unit active power accommodation range of the photovoltaic power supply unit at each time point in time or the upper limit of each continuous interval of the accommodation range;

s4330) future T₁The unit active power accommodation range of the photovoltaic power supply unit in time is T in the future₁And taking intersection of unit active power accommodation ranges of the photovoltaic power supply units at each time point in time.