CN116454913A - Primary frequency modulation system and method based on variable frequency adjustment and lifting of coagulation pump - Google Patents
Primary frequency modulation system and method based on variable frequency adjustment and lifting of coagulation pump Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000015271 coagulation Effects 0.000 title claims abstract description 7
- 238000005345 coagulation Methods 0.000 title claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 37
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000012937 correction Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 36
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- 238000002485 combustion reaction Methods 0.000 claims description 9
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- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000011217 control strategy Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention provides a primary frequency modulation lifting system and method based on variable frequency regulation of a coagulation pump. Wherein, the system includes: the processing matrix is used for respectively calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal; the correction matrix is connected with the processing matrix and is used for obtaining a corrected condensate flow deviation instruction after limiting the condensate flow deviation of each unit side; the judging matrix is used for being connected to each unit, the unit frequency deviation of each unit is determined according to the collected frequency parameters of the actual operation of each unit, and the power increment signal of each unit side is obtained by calling the set frequency modulation control dead zone and the power increment function under the representation of the judging logic; and the control module is used for controlling the flow of the condensate water at each unit side according to the obtained power increment signal at each unit side so as to adjust the instantaneous load lifting of each unit.
Description
Technical Field
The application belongs to the technical field of power generation, and particularly relates to a primary frequency modulation system and method based on variable frequency regulation and lifting of a condensing pump.
Background
The power grid frequency is an important index for evaluating the quality of electric energy, reflects the balance relation between the generated power and the load, and the frequency fluctuation exceeding the allowable range can seriously affect the normal use and the safety of electric equipment, so that the economic benefit loss of users and the instability of an electric power system are caused, and the stability of the frequency of the electric power system is ensured, and the high-quality electric power supply is very important. Under the new situation of intelligent power grids such as large-scale wind power access and ultra-high voltage interconnection, the power grid has higher requirements on the frequency modulation and peak shaving capacity of a conventional thermal power generating unit, and deep digging potential of the unit in the aspect of operation control is required, namely flexible frequency modulation and deep peak shaving are realized on the premise of ensuring stable operation, and the power grid has higher grid source coordination and support capacity.
Taking a power grid as an example, along with the construction of intelligent power grids such as extra-high voltage external electricity and new energy grid connection, the power grid is more and more complex in structure, the frequency modulation and peak regulation capacity of newly added parts such as nuclear power, extra-high voltage input electric quantity and the like is limited, especially the primary frequency modulation contribution is less, and the increased wind power generation brings greater pressure to the safe and stable operation of the power grid, so that the frequency modulation, peak regulation and voltage regulation capacity of the power grid mainly depend on a conventional generator set based on thermal power generation. On the power plant side, it is determined that the primary frequency modulation function control system of the generator set cannot perform dynamic analysis and processing, and manual analysis and adjustment are performed only when the performance of the generator set is deteriorated until the primary frequency modulation function is seriously reduced, so that the primary frequency modulation capability of the generator set cannot be ensured.
In the year 2016, 12, the statement of opinion is solicited by the national regulation of the regulation of primary frequency modulation management of the electric power system, and stricter requirements are put forward on primary frequency modulation response time, actual action integral electric quantity and the like. Meanwhile, according to the regulations of supervision and management, the examination of the primary frequency modulation remote large disturbance result is started in the 4 th 2017. 5 months in 2018, the method can be used for supervising and issuing the implementation rules (trial) of grid-connected operation management of power plants in North China, and a stricter primary frequency modulation assessment standard is formulated. Namely, primary frequency modulation electric quantity contribution indexes Q%15, Q%30 and Q%45 of 15 seconds, 30 seconds and 45 seconds are respectively calculated, and the final primary frequency modulation electric quantity contribution index Q%:
Q%= k15×Q%15+ k30×Q%30+ k45×Q%45
wherein:
q% 15=Δqs15/Δqe15×100% (Q% 30, Q%45, and so on)
Δ Q S15: the unit is 15 seconds to perform primary frequency modulation to actually contribute to the electric quantity;
Δ Q E15: the unit integrates the electric quantity by 15 seconds primary frequency modulation theory.
k15: the weight of the primary frequency modulation electric quantity contribution index of the unit for 15 seconds is represented by a coefficient k15+k30+k45=1, wherein k15, k30 and k45 respectively take 0.55, 0.3 and 0.15.
Meanwhile, the primary frequency modulation large disturbance assessment standard of the power grid is strict, and punishment amount is large. From the primary frequency modulation large disturbance pre-assessment result issued by 3 months in 2017, the assessment electric quantity of one 300MW unit can reach 300MWh if the unit is unqualified. Therefore, how to pointedly optimize the frequency modulation strategy and improve the frequency modulation performance of the unit under each mode is an urgent work of the power plant.
Disclosure of Invention
Accordingly, the main objective of the present invention is to provide a system and method for enhancing primary frequency modulation based on variable frequency adjustment of a pump.
The technical scheme adopted by the invention is as follows:
lifting primary frequency modulation system based on condensing pump frequency conversion regulation includes:
a processing module configured to:
providing or constructing a processing matrix, wherein the processing matrix is used for respectively calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal;
providing or constructing a correction matrix, wherein the correction matrix is connected with the processing matrix and is used for obtaining a corrected condensate flow deviation instruction after limiting the condensate flow deviation of each unit side;
providing or constructing a judgment matrix, wherein the judgment matrix is used for being connected to each unit, determining the unit frequency deviation of each unit according to the acquired frequency parameters of the actual operation of each unit, and obtaining a power increment signal at the side of each unit by calling a set frequency modulation control dead zone and a power increment function under the representation of judgment logic;
the control module is connected with the processing module and used for controlling the condensate flow of each unit side according to the obtained power increment signal of each unit side so as to adjust the instantaneous load lifting of each unit.
Further, controlling the condensate flow rate of each unit side according to the obtained power increment signal of each unit side to adjust the instantaneous load lifting of each unit specifically comprises:
controlling the flow of condensate water by controlling the power of a condensate pump and the opening of a condensate conveying pipeline regulating valve according to the power increment signal of each unit; regulating the instantaneous load lifting of each unit according to the control of the condensate flow, and obtaining the actual value of the regulated load of each unit;
simultaneously, the opening degree of the gas turbine regulating gate is synchronously regulated according to the actual value of the load of each unit, so that the combustion rate of the boiler is regulated and controlled, the response speed of the variable load initial stage is accelerated, and the overall load response capacity of the unit is improved.
Further, the processing matrix includes:
a power allocation unit;
the system comprises a plurality of processing units, a plurality of control units and a control unit, wherein each processing unit is connected to each unit side and used for acquiring a load signal of each unit; acquiring an adjustable value of each unit according to the load signal of each unit and the adjustment dead zone control range set by each unit side;
the power dispatching unit loads the adjustable value of each unit, obtains the power adjustment sub-increment of each unit according to the proportion of the adjustable value among the units and the total power increment represented by the power increment signal, and forms the power increment sub-signal of the adjustment unit according to the power adjustment sub-increment of each unit.
Further, the regulation dead zone control range is a difference value of rated rotational speed of the unit at a set power, and the difference value is ±2rpm.
Further, the power increment division signal comprises a unit identification code.
Further, the correction matrix includes:
a management unit and a plurality of correction units;
the management unit is used for connecting a power distribution unit arranged in the processing matrix, receiving the power increment division signal sent by the power distribution unit, identifying that the power increment division signal contains a unit identification code, and correspondingly transmitting the power increment division signal to the correction unit according to the identification code;
the correction unit is used for outputting the power increment partial signals after amplitude elimination and harmonic filtering.
Further, the correction unit comprises a nonlinear amplitude limiting element and a low-pass filter, wherein the nonlinear amplitude limiting element is used for eliminating the amplitude exceeding the set amplitude, and the low-pass filter is used for filtering out harmonic waves after the amplitude limiting is eliminated.
Further, the judgment matrix includes:
a plurality of reference comparing units and a judging unit connected to each reference comparing unit;
the reference comparison unit is used for determining the unit frequency deviation of each unit according to the acquired frequency parameters of the actual operation of each unit;
the judging unit is used for obtaining the power increment signal of each unit side by calling the set frequency modulation control dead zone and the power increment function under the representation of the judging logic.
Further, the judging logic is used for representing the execution steps or sequence of the judging unit, and the judging unit acts according to the following steps or sequence:
a: judging whether the disturbance of the power increment signal to the power of the unit exceeds a set threshold value or not by calling a set frequency modulation control dead zone; if yes, executing the step B);
b: and calling a power increment function to calculate a power increment signal at each unit side.
The invention also provides a method for lifting primary frequency modulation based on the variable frequency adjustment of the coagulation pump, which comprises the following steps:
step 1), calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal;
step 2) carrying out amplitude limiting treatment on the condensate flow deviation of each unit side to obtain a corrected condensate flow deviation instruction;
step 3) determining the unit frequency deviation of each unit according to the collected frequency parameters of the actual operation of each unit, and obtaining a power increment signal at the side of each unit by calling a set frequency modulation control dead zone and a power increment function under the representation of a judgment logic;
and 4) controlling the condensate flow of each unit side according to the obtained power increment signal of each unit side to regulate the instantaneous load lifting of each unit.
In step 4), controlling the condensate flow rate of each unit side according to the obtained power increment signal of each unit side to adjust the load lifting of each unit instant specifically comprises:
controlling the flow of condensate water by controlling the power of a condensate pump and the opening of a condensate conveying pipeline regulating valve according to the power increment signal of each unit; regulating the instantaneous load lifting of each unit according to the control of the condensate flow, and obtaining the actual value of the regulated load of each unit;
simultaneously, the opening degree of the gas turbine regulating gate is synchronously regulated according to the actual value of the load of each unit, so that the combustion rate of the boiler is regulated and controlled, the response speed of the variable load initial stage is accelerated, and the overall load response capacity of the unit is improved.
According to the variable load control system, the variable load control strategy for changing the flow rate of condensate is adopted through the variable-frequency load control based on the condensate pump, so that the efficiency of the unit is improved. The instantaneous load lifting requirement of the unit is met by changing the flow of the condensate. In the condensate water throttling control process, the load change is to coordinate and change the opening of a turbine throttle valve by changing the control strategy of the condensate water flow control valve, so as to accelerate the response speed of the variable load initial stage, and improve the overall load response capacity of the unit by optimizing the boiler combustion rate control, thus greatly improving the running efficiency of the unit and reducing the power generation loss of the unit, further improving the primary frequency modulation large-frequency difference performance, meeting the requirements of a power grid and reducing the electric quantity assessment.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
fig. 2 is a schematic diagram of the frame principle of the system in the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions, design methods and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1:
the invention provides a primary frequency modulation system based on variable frequency regulation and lifting of a coagulation pump, which comprises the following components:
a processing module configured to:
providing or constructing a processing matrix, wherein the processing matrix is used for respectively calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal;
providing or constructing a correction matrix, wherein the correction matrix is connected with the processing matrix and is used for obtaining a corrected condensate flow deviation instruction after limiting the condensate flow deviation of each unit side;
providing or constructing a judgment matrix, wherein the judgment matrix is used for being connected to each unit, determining the unit frequency deviation of each unit according to the acquired frequency parameters of the actual operation of each unit, and obtaining a power increment signal at the side of each unit by calling a set frequency modulation control dead zone and a power increment function under the representation of judgment logic;
the control module is connected with the processing module and used for controlling the condensate flow of each unit side according to the obtained power increment signal of each unit side so as to adjust the instantaneous load lifting of each unit.
In the above, controlling the condensate flow rate of each unit side according to the obtained power increment signal of each unit side to adjust the load lifting of each unit instant specifically includes:
controlling the flow of condensate water by controlling the power of a condensate pump and the opening of a condensate conveying pipeline regulating valve according to the power increment signal of each unit; regulating the instantaneous load lifting of each unit according to the control of the condensate flow, and obtaining the actual value of the regulated load of each unit;
simultaneously, the opening degree of the gas turbine regulating gate is synchronously regulated according to the actual value of the load of each unit, so that the combustion rate of the boiler is regulated and controlled, the response speed of the variable load initial stage is accelerated, and the overall load response capacity of the unit is improved.
In the foregoing, the processing matrix includes:
a power allocation unit;
the system comprises a plurality of processing units, a plurality of control units and a control unit, wherein each processing unit is connected to each unit side and used for acquiring a load signal of each unit; acquiring an adjustable value of each unit according to the load signal of each unit and the adjustment dead zone control range set by each unit side;
the power dispatching unit loads the adjustable value of each unit, obtains the power adjustment sub-increment of each unit according to the proportion of the adjustable value among the units and the total power increment represented by the power increment signal, and forms the power increment sub-signal of the adjustment unit according to the power adjustment sub-increment of each unit.
In the above, the regulation dead zone control range is a difference value of rated rotational speed of the unit at a set power, the difference value being ±2rpm.
In the above, the power increment division signal includes a unit identification code.
In the foregoing, the correction matrix includes:
a management unit and a plurality of correction units;
the management unit is used for connecting a power distribution unit arranged in the processing matrix, receiving the power increment division signal sent by the power distribution unit, identifying that the power increment division signal contains a unit identification code, and correspondingly transmitting the power increment division signal to the correction unit according to the identification code;
the correction unit is used for outputting the power increment partial signals after amplitude elimination and harmonic filtering.
In the above, the correction unit includes a nonlinear limiter element for canceling an amplitude exceeding a set amplitude, and a low-pass filter for harmonic filtering after the limiter cancellation.
In the foregoing, the judgment matrix includes:
a plurality of reference comparing units and a judging unit connected to each reference comparing unit;
the reference comparison unit is used for determining the unit frequency deviation of each unit according to the acquired frequency parameters of the actual operation of each unit;
the judging unit is used for obtaining the power increment signal of each unit side by calling the set frequency modulation control dead zone and the power increment function under the representation of the judging logic.
Further, the judging logic is used for representing the execution steps or sequence of the judging unit, and the judging unit acts according to the following steps or sequence:
a: judging whether the disturbance of the power increment signal to the power of the unit exceeds a set threshold value or not by calling a set frequency modulation control dead zone; if yes, executing the step B); if the step C) is not executed;
b: calling a power increment function to calculate a power increment signal of each unit side;
c: if not, entering a verification step, wherein the verification step is as follows, calling an initial power increment signal and each unit load signal, and respectively calculating condensate flow deviation of each unit side according to the received power increment signal and each unit load signal; clipping the condensate flow deviation of each unit side to obtain a corrected condensate flow deviation instruction; determining unit frequency deviation of each unit according to the collected frequency parameters of actual operation of each unit, judging whether disturbance of a power increment signal to unit power exceeds a set threshold value by calling a set frequency modulation control dead zone, repeating check for 3-5 times, if so, detecting whether the set amplitude of a nonlinear amplitude limiting element in a correction unit meets the regulation requirement, looking up a table according to the corresponding power increment signal-unit load signal-set amplitude, and modifying the set amplitude to meet the requirement of the set threshold value.
In order to quickly respond to primary frequency modulation requirements of a power grid, a traditional thermal power generating unit generally adopts a main steam throttle regulation measure. When the large frequency difference is generated by the large power notch of the power grid, the problems of unit operation parameters, valve nonlinearity, unit adjustment delay and the like possibly existing in the actual unit operation process can reduce the primary frequency modulation performance of the unit. According to the method, the heat storage capacity of the thermal power unit is fully developed, and the primary frequency modulation large-frequency difference requirement of the power grid is responded rapidly by exciting and calling the existing energy storage in the thermal power unit. The basic principle is that the variable load control strategy for changing the flow rate of condensate is adopted based on the variable-frequency load regulation of the condensate pump, so that the efficiency of the unit is improved. Under the control strategy, the condensate flow deviation is calculated according to the received power increment signal and the unit load signal, a corrected condensate flow deviation instruction is obtained after amplitude limiting treatment, the unit frequency deviation is calculated, and the power increment signal is obtained through frequency modulation control dead zone judgment and a power increment function. The instantaneous load lifting requirement of the unit is met by changing the flow of the condensate. In the condensate water throttling control process, the load change is to coordinate and change the opening of a turbine throttle valve by changing the control strategy of the condensate water flow control valve, so as to accelerate the response speed of the variable load initial stage, and improve the overall load response capacity of the unit by optimizing the boiler combustion rate control, thus greatly improving the running efficiency of the unit and reducing the power generation loss of the unit, further improving the primary frequency modulation large-frequency difference performance, meeting the requirements of a power grid and reducing the electric quantity assessment.
In the application, the unit primary frequency modulation performance large disturbance test meets the following requirements:
(1) Frequency modulation dead zone: not more than + -2 r/min and response time less than 3S.
(2) The time to reach 75% of the target load should not be greater than 15S, and the time to reach 90% of the target load should not be greater than 30S.
(3) Primary frequency modulation load variation amplitude: the upper limit is not less than 28MW.
Example 2
Referring to fig. 2, the application also discloses a method for lifting primary frequency modulation based on variable frequency adjustment of a coagulation pump, which comprises the following steps:
step 1), calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal;
step 2) carrying out amplitude limiting treatment on the condensate flow deviation of each unit side to obtain a corrected condensate flow deviation instruction;
step 3) determining the unit frequency deviation of each unit according to the collected frequency parameters of the actual operation of each unit, and obtaining a power increment signal at the side of each unit by calling a set frequency modulation control dead zone and a power increment function under the representation of a judgment logic;
and 4) controlling the condensate flow of each unit side according to the obtained power increment signal of each unit side to regulate the instantaneous load lifting of each unit.
In step 1), obtaining a load signal of each unit; acquiring an adjustable value of each unit according to the load signal of each unit and the adjustment dead zone control range set by each unit side;
and loading an adjustable value of each unit, respectively obtaining power adjustment sub-increment of each unit according to the proportion of the adjustable value among the units and the total power increment represented by the power increment signal, and forming a power increment sub-signal of the adjustment unit according to the power adjustment sub-increment of each unit.
In step 4), controlling the condensate flow rate of each unit side according to the obtained power increment signal of each unit side to adjust the load lifting of each unit instant specifically comprises:
controlling the flow of condensate water by controlling the power of a condensate pump and the opening of a condensate conveying pipeline regulating valve according to the power increment signal of each unit; regulating the instantaneous load lifting of each unit according to the control of the condensate flow, and obtaining the actual value of the regulated load of each unit;
simultaneously, the opening degree of the gas turbine regulating gate is synchronously regulated according to the actual value of the load of each unit, so that the combustion rate of the boiler is regulated and controlled, the response speed of the variable load initial stage is accelerated, and the overall load response capacity of the unit is improved.
According to the variable load control system, the variable load control strategy for changing the flow rate of condensate is adopted through the variable-frequency load control based on the condensate pump, so that the efficiency of the unit is improved. The instantaneous load lifting requirement of the unit is met by changing the flow of the condensate. In the condensate water throttling control process, the load change is to coordinate and change the opening of a turbine throttle valve by changing the control strategy of the condensate water flow control valve, so as to accelerate the response speed of the variable load initial stage, and improve the overall load response capacity of the unit by optimizing the boiler combustion rate control, thus greatly improving the running efficiency of the unit and reducing the power generation loss of the unit, further improving the primary frequency modulation large-frequency difference performance, meeting the requirements of a power grid and reducing the electric quantity assessment.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (11)
1. Lifting primary frequency modulation system based on condensing pump frequency conversion regulation, its characterized in that includes:
a processing module configured to:
providing or constructing a processing matrix, wherein the processing matrix is used for respectively calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal;
providing or constructing a correction matrix, wherein the correction matrix is connected with the processing matrix and is used for obtaining a corrected condensate flow deviation instruction after limiting the condensate flow deviation of each unit side;
providing or constructing a judgment matrix, wherein the judgment matrix is used for being connected to each unit, determining the unit frequency deviation of each unit according to the acquired frequency parameters of the actual operation of each unit, and obtaining a power increment signal at the side of each unit by calling a set frequency modulation control dead zone and a power increment function under the representation of judgment logic;
the control module is connected with the processing module and used for controlling the condensate flow of each unit side according to the obtained power increment signal of each unit side so as to adjust the instantaneous load lifting of each unit.
2. The variable frequency, modulated boost primary frequency modulation system of claim 1, wherein controlling the flow of condensate on each unit side based on the derived power delta signal on each unit side to regulate the instantaneous load rise and fall of each unit comprises:
controlling the flow of condensate water by controlling the power of a condensate pump and the opening of a condensate conveying pipeline regulating valve according to the power increment signal of each unit; regulating the instantaneous load lifting of each unit according to the control of the condensate flow, and obtaining the actual value of the regulated load of each unit;
simultaneously, the opening degree of the gas turbine regulating gate is synchronously regulated according to the actual value of the load of each unit, so that the combustion rate of the boiler is regulated and controlled, the response speed of the variable load initial stage is accelerated, and the overall load response capacity of the unit is improved.
3. The variable frequency modulation lift based on pump of claim 1, wherein the processing matrix comprises:
a power allocation unit;
the system comprises a plurality of processing units, a plurality of control units and a control unit, wherein each processing unit is connected to each unit side and used for acquiring a load signal of each unit; acquiring an adjustable value of each unit according to the load signal of each unit and the adjustment dead zone control range set by each unit side;
the power dispatching unit loads the adjustable value of each unit, obtains the power adjustment sub-increment of each unit according to the proportion of the adjustable value among the units and the total power increment represented by the power increment signal, and forms the power increment sub-signal of the adjustment unit according to the power adjustment sub-increment of each unit.
4. The variable frequency control boost primary frequency modulation system based on a pump according to claim 3, wherein the control range of the dead zone is a difference value of rated rotational speed of the unit at a set power, and the difference value is ± 2rpm.
5. The variable frequency adjustment and lifting primary frequency modulation system based on a pump according to claim 3, wherein the power increment division signal comprises a unit identification code.
6. The variable frequency adjustment boost primary frequency modulation system based on a pump of claim 1, wherein the correction matrix comprises:
a management unit and a plurality of correction units;
the management unit is used for connecting a power distribution unit arranged in the processing matrix, receiving the power increment division signal sent by the power distribution unit, identifying that the power increment division signal contains a unit identification code, and correspondingly transmitting the power increment division signal to the correction unit according to the identification code;
the correction unit is used for outputting the power increment partial signals after amplitude elimination and harmonic filtering.
7. The pump-based variable frequency adjustment boost primary frequency modulation system of claim 6, wherein the correction unit includes a nonlinear limiter element for canceling amplitude exceeding a set amplitude and a low pass filter for harmonic filtering after the limiter cancellation.
8. The variable frequency adjustment boost primary frequency modulation system based on a pump of claim 1, wherein the decision matrix comprises:
a plurality of reference comparing units and a judging unit connected to each reference comparing unit;
the reference comparison unit is used for determining the unit frequency deviation of each unit according to the acquired frequency parameters of the actual operation of each unit;
the judging unit is used for obtaining the power increment signal of each unit side by calling the set frequency modulation control dead zone and the power increment function under the representation of the judging logic.
9. The variable frequency, modulated boost primary frequency system of claim 1 or 8, wherein the determining logic is configured to indicate the execution steps or sequence of the determining unit, and the determining unit is configured to perform the following steps or sequence:
a: judging whether the disturbance of the power increment signal to the power of the unit exceeds a set threshold value or not by calling a set frequency modulation control dead zone; if yes, executing the step B);
b: and calling a power increment function to calculate a power increment signal at each unit side.
10. The method for lifting primary frequency modulation based on the variable frequency regulation of the coagulation pump is characterized by comprising the following steps of:
step 1), calculating the condensate flow deviation of each unit side according to the received power increment signal and each unit load signal;
step 2) carrying out amplitude limiting treatment on the condensate flow deviation of each unit side to obtain a corrected condensate flow deviation instruction;
step 3) determining the unit frequency deviation of each unit according to the collected frequency parameters of the actual operation of each unit, and obtaining a power increment signal at the side of each unit by calling a set frequency modulation control dead zone and a power increment function under the representation of a judgment logic;
and 4) controlling the condensate flow of each unit side according to the obtained power increment signal of each unit side to regulate the instantaneous load lifting of each unit.
11. The method of claim 10, wherein in step 4), controlling the flow rate of condensate on each unit side according to the obtained power increment signal on each unit side to adjust the load rise and fall of each unit instant specifically comprises:
controlling the flow of condensate water by controlling the power of a condensate pump and the opening of a condensate conveying pipeline regulating valve according to the power increment signal of each unit; regulating the instantaneous load lifting of each unit according to the control of the condensate flow, and obtaining the actual value of the regulated load of each unit;
simultaneously, the opening degree of the gas turbine regulating gate is synchronously regulated according to the actual value of the load of each unit, so that the combustion rate of the boiler is regulated and controlled, the response speed of the variable load initial stage is accelerated, and the overall load response capacity of the unit is improved.
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