CN110061522B - Control method for automatic power generation system of wind power plant - Google Patents

Abstract

The invention discloses a control method of an automatic power generation system of a wind power plant, which is characterized in that the automatic power generation system of the wind power plant acquires a wind field dispatching target value through a communication management machine, detects a gateway table of the wind power plant to acquire wind field internet power, acquires related information of a main control of a fan, calculates and judges all the acquired information, sends an active power control command to each fan unit, and the main control receives and executes the power control command so as to achieve the purpose that the actual internet power of the wind field follows the dispatching target value. The invention fully considers various states of the fan and the ambient temperature of the unit, so that the unit can be operated as much as possible in winter, and the problem that liquid in the unit is frozen due to over low ambient temperature is reduced; the starting and stopping time of the unit is considered, and the frequent starting and stopping operations of the unit are reduced as much as possible; and (3) in consideration of the unit margin, a mode of hierarchically classifying the whole unit is provided, and different control strategies are adopted for units in different queues.

Description

Control method for automatic power generation system of wind power plant

Technical Field

The invention relates to the technical field of wind power generation, in particular to a control method of an automatic power generation system of a wind power plant.

Background

In the prior art, an automatic power generation system (AGC for short) of a wind farm is a power generation management system which intelligently manages active power of the wind farm based on a comprehensive prediction technology, controls wind farm output in real time, and tracks a predetermined prediction curve and other comprehensive grid-connected requirements. AGC is an important function in energy management systems EMS.

The existing active power distribution principle of the wind power plant is that the higher the wind speed is, the larger the output of the wind turbine generator is, and weight factors are set for various wind speed conditions of the wind power plant, so that the weight factors are used as the basis for active power distribution of the wind power plant. The distribution method can ensure that the fan output under the peak condition is larger, but the weight factor is determined by depending on the experience too much, and the optimal distribution is difficult to achieve.

The wind power plant has automatic power generation control capability, and in a system scheduling period, the output power of the wind generation set is controlled by a master control according to the running state of the wind generation set, so that the system scheduling requirement is met. An active power distribution algorithm in a wind power plant is the core of AGC of a wind power plant layer. The existing AGC control strategy directly performs active power distribution generally according to an equal margin or equal proportion mode without excessive consideration on the actual running state of a fan.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a reasonable and reliable control method of an automatic power generation system of a wind power plant, which fully considers various states of a fan and the ambient temperature of a unit, so that the unit can be operated as much as possible in winter environment, and the problem that liquid in the unit is frozen due to too low ambient temperature is solved; the starting and stopping time of the unit is considered, and the frequent starting and stopping operations of the unit are reduced as much as possible; and (3) in consideration of the unit margin, a mode of hierarchically classifying the whole unit is provided, and different control strategies are adopted for units in different queues.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: a control method of an automatic power generation system of a wind power plant comprises the steps that the automatic power generation system of the wind power plant obtains a scheduling target value through a communication management machine, a gateway table of the wind power plant is detected to obtain wind field internet power, relevant information of a main control of a fan is collected, after all collected information is calculated and judged, an active power control command is issued to each fan unit, and the main control receives and executes the power control command, so that the purpose that the actual internet power of the wind field follows the scheduling target value is achieved; which comprises the following steps:

1) collecting, scheduling and issuing a full-field control command value and a wind power plant grid-connected point power value, and calculating a difference value between a target value and an actual value:

ΔP＝P_Gref-P_farm

wherein: p_GrefIs a scheduling control target value; p_farmThe grid-connected point gateway meter is an actually measured grid-connected power value of the wind power plant; Δ P is the power difference between the target value and the actual value;

2) limiting wind farm active power rate of change

In order to prevent large fluctuation of the full-field power, the power change rate of the wind power plant is limited within 1min and 10min, and the power difference value after the power change rate is limited is delta P_Fset；

ΔP_Fset＝limit(ΔP)

Wherein: Δ P is the power difference between the target value and the actual value; delta P_FsetIs the power difference after 1 minute, 10 minute rate of change limit;

3) determination of Δ P_FsetWhether the dead zone range is included, if the dead zone range is included, the step 5) is executed, and if the dead zone range is not included, the step 4) is executed;

4) if Δ P_FsetWhen the grid power value is larger than delt, the grid power value is smaller than the target value, the output of the wind power plant needs to be increased, a power-per-liter distribution strategy is executed, and the dP of each unit is calculated_iset(ii) a If Δ P_FsetAnd (4) delt represents that the power value of the internet is higher than the dispatching target value, the output of the wind power plant needs to be reduced, a power reduction distribution strategy is executed, and the dP of each unit is calculated_iset(ii) a Where delt is a control strategy parameter fixed value, representing an execution dead zone value; dP_isetIs the power variation value of a single unit;

5) control strategy data output handling

5.1) pairs of dP_isetPerforming master control speed limit processing

dP_isetFor the power change value obtained by the calculation of the distribution strategy, speed limit processing is required to prevent the output power from fluctuating too much;

5.2) calculating the pre-issued power value P_iset

P_imeaIs the actual active power value of the unit, acquires the master control information, dP_isetCalculating a power variation value, P, for the allocation policy_isetIs a pre-issued power value;

5.3) output restriction processing

P_{iset_now}＝P_iset

if(P_{iset_now}≥P_iN)

P_{iset_now}＝P_iN

else if(P_{iset_now}≥P_imax+300)

P_{iset_now}＝P_iN

In the formula, P_iNRated power of the unit, P_imaxThe maximum active power which can be output by the unit in the next control period, namely the predicted power P of the ultra-short-term wind turbine generator at the current wind speed_{iset_now}Outputting the final calculated power set value to the main control fan;

6) setting the power of each fan to a value P_{iset_now}And sending the data to the master control.

In the step 4), in the power-up distribution strategy, for the fan, in order to achieve the purpose of increasing the power of the whole field, the power of the whole field can be increased by performing power-up operation on the running unit and the unit of which the predicted power in the next period is greater than the actual power, or performing startup operation on the unit which is in a shutdown state.

In the step 4), in a power reduction distribution strategy, reducing the output power value of the wind field, and mainly achieving the purpose of reducing the full-field output power by performing power limiting operation on the running unit which is being connected to the grid or performing shutdown operation on the running unit which is being connected to the grid;

for the running unit, the unit can be directly operated in a limited power mode, and the minimum value of the limited power is P_iminSetting parameters for strategy, if limiting its power to P_iminThe unit has the risk of shutdown; the method comprises the steps of carrying out shutdown operation on a unit, considering the factor of the running time of the unit, and having long running time, the shutdown does not have great influence on the unit, if some units only run for a short time, the unit is stopped at the moment, the unit is frequently started and stopped, and the service life of unit components is influenced, so that the unit which just runs soon is not stopped as much as possible, but has higher priority along with a scheduling target value, the unit which has short running time needs to be stopped, the special working condition of a scheduling value can be met, and the unit which has short running time can be also stopped.

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

1. the output change rate of the electric field can be limited, the output stability of the wind power plant is improved, and the impact on a power grid is reduced.

2. The starting and stopping operation of the fan is fully considered, the starting and stopping switching of the wind turbine generator is ensured to be as few as possible, and the service life of the wind turbine generator is prolonged.

3. The influence of the ambient temperature on the unit is considered, the ambient temperature of the unit is introduced into a control strategy, so that the unit is started less in summer environment, and is kept running as far as possible in winter environment, hardware in the unit can work normally or the working time of a heater is reduced, and the power generation capacity of an owner is improved.

4. The method comprises the steps of taking various running states of the fan into consideration, carrying out hierarchical classification on the unit, processing various complex working conditions, introducing a weighting algorithm, obtaining corresponding coefficients according to various states of the fan, carrying out weighting processing according to different weights, obtaining a weighted comprehensive value, and carrying out strategy calculation according to the weighted comprehensive value, so that a power distribution result is more reasonable.

Drawings

Fig. 1 is a topological diagram of an automatic power generation system (AGC for short) of a wind farm.

Fig. 2 is a main flow chart of a control strategy of an automatic generation system (AGC for short) of a wind power plant.

Fig. 3 is a power-per-liter diagram.

Fig. 4 is a boosted power queue classification diagram.

Fig. 5 is a power down diagram.

Fig. 6 is a hierarchical classification queue diagram for a power down allocation strategy.

Detailed Description

The present invention will be further described with reference to the following specific examples.

An automatic power generation system (AGC for short) of a wind power plant takes a scheduling value as a control target value, and controls the grid power of the wind power plant to follow a scheduling command value, wherein the topology of the system is shown in figure 1.

The method for controlling the automatic power generation system of the wind farm provided by the embodiment specifically includes the steps that the automatic power generation system of the wind farm obtains a dispatching target value through a communication management machine, a gateway table of the wind farm is detected to obtain wind farm internet power, relevant information of a main control of a fan is collected, all collected information is transmitted to a distribution strategy, after calculation and judgment are conducted on the strategy, an active power control command is issued to each fan unit, and the main control receives and executes the control command, so that the purpose that the actual internet power of the wind farm follows the dispatching target value is achieved. The method specifically comprises the following steps:

1) collecting, scheduling and issuing a full-field control command value and a wind power plant grid-connected point power value, and calculating a difference value between a target value and an actual value:

ΔP＝P_Gref-P_farm

wherein: p_GrefIs a scheduling control target value; p_farmThe grid-connected point gateway meter is an actually measured grid-connected power value of the wind power plant; Δ P is the power difference between the target value and the actual value;

2) limiting wind farm active power rate of change

The technical regulation of the wind power plant access power system provides specific requirements for the active power regulation of the wind power plant, and the recommended values of the active power change limit values of the wind power plant are shown in the following table:

in order to prevent large fluctuation of the full-field power, the power change rate of the wind power plant is limited within 1min and 10min, and the power difference value after the power change rate is limited is delta P_Fset。

ΔP_Fset＝limit(ΔP)

Wherein: Δ P is the power difference between the target value and the actual value; delta P_FsetIs the power difference after 1 minute, 10 minute rate of change limit;

3) determination of Δ P_FsetWhether it is in the dead zone range, if it is in the dead zone range, the data output process is directly performed to perform step 5), otherwise, step 4) is performed.

4) If Δ P_FsetWhen the grid power value is larger than delt, the grid power value is smaller than the target value, the output of the wind power plant needs to be increased, a power-per-liter distribution strategy is executed, and the dP of each unit is calculated_iset(ii) a If Δ P_FsetAnd (4) delt represents that the power value of the internet is higher than the dispatching target value, the output of the wind power plant needs to be reduced, a power reduction distribution strategy is executed, and the dP of each unit is calculated_iset(ii) a Where delt is a control strategy parameter fixed value, representing an execution dead zone value; dP_isetIs the power variation value of a single unit.

5) Control strategy data output processing (control strategy main flow is shown in figure 2)

5.1) pairs of dP_isetPerforming master control speed limit processing

dP_isetFor the power change value obtained by the calculation of the distribution strategy, speed limit processing is required to prevent the output power from fluctuating too much;

5.2) calculating the pre-issued power value P_iset

P_imeaIs the actual active power value of the unit, acquires the master control information, dP_isetCalculating a power variation value, P, for the allocation policy_isetIs a pre-issued power value;

5.3) output restriction processing

P_{iset_now}＝P_iset

if(P_{iset_now}≥P_iN)

P_{iset_now}＝P_iN

else if(P_{iset_now}≥P_imax+300)

P_{iset_now}＝P_iN

In the formula, P_iNRated power of the unit, P_imaxThe maximum active power which can be output by the unit in the next control period, namely the predicted power P of the ultra-short-term wind turbine generator at the current wind speed_{iset_now}Outputting the final calculated power set value to the main control fan;

6) setting the power of each fan to a value P_{iset_now}And sending the data to the master control.

In step 4), in the power-up distribution strategy, for the fan, in order to achieve the purpose of increasing the power of the whole on-line, the full-field power can be increased by performing power-up operation on the unit which is running and predicts that the power of the next period is greater than the actual power, or performing start-up operation on the unit which is shutting down, as shown in fig. 3.

The power-up allocation strategy comprises the following steps:

4.1.1) hierarchical classification of full-scale wind turbines

In order to increase the power of the whole field, only the unit meeting the condition can be subjected to power-up operation, or the unit being stopped is subjected to power-on operation, so we firstly classify the unit and find out the unit with power-up capability, as shown in fig. 4, the specific conditions are as follows:

all fans in the whole field: all fans of the wind power plant are divided into a controllable unit CtrlDFIG queue and an uncontrollable unit queue according to the states of the fans;

controllable unit CtrlDFIG column: the method comprises the steps that a fan main control unit can execute a control command of an automatic power generation system of the wind power plant, and the fan main control unit is divided into a running unit RunDFIG queue and a stopping StopDFIG queue according to the grid connection state of the fan;

an uncontrollable unit queue: the unit and the benchmark fan are in fault;

running a unit RunDFIG queue: the method refers to comparing the maximum active power P of a fan by a unit in grid-connected power generation_imaxAnd measured power P_imeaThe size can divide the unit into an allowance increasing queue InMarque queue and an allowance increasing queue;

stopping the unit stop fifo queue: the method comprises the steps that a wind power plant automatic power generation system controls a unit to stop, and the unit is divided into a StopG _ sc queue with longer stop time and meeting the stop time and a StopG _ nsc queue with shorter stop time and not meeting the stop time according to the stop time of a fan;

margin-added queue InMarque: refers to P in running unit RunDFIG queue_imax＞P_imeaSet of (P)_imaxThe maximum active power which can be output by the unit, namely the predicted power of the wind turbine generator at the current wind speed is calculated by a wind power system according to the state of the fan and the current wind speed information, P_imeaIs the measured power, P, of the unit_imax＞P_imeaThe maximum active power value of the fan is larger than the actual measurement power, the representative unit has the power increasing capacity, and the power is generated in the periodElectric power of P_imeaThe output power of the next cycle can be increased to P_imax；

The requirement of the downtime unit StopG _ sc is met: means in the stop pDFIG queue of the shutdown unit

The air conditioning system comprises a machine set and a control system,

the communication manager acquires master control information to obtain the time when the unit is stopped;

the shortest downtime of the unit is set as a control strategy parameter value;

the unit which has the shutdown time longer than the shortest shutdown time is shown, and the startup operation of the unit at the moment can not generate great influence on a hardware system of the fan;

the down time set StopG _ nsc is not satisfied: means in the stop pDFIG queue of the shutdown unit

The air conditioning system comprises a machine set and a control system,

is the unit down time;

is the shortest downtime, is the control strategy fixed value,

the unit which indicates that the unit has stopped for less than the shortest stop time has short stop time, and the start-up operation is not required as much as possible in a short period, otherwise, the unit is frequently started and stopped, and the service life of unit hardware is not facilitated; sorting the units in the queue according to the downtime from long to short, arranging the units with long downtime in front, and starting the unit preferentially;

4.1.2) calculating a temperature-dependent margin weight w_addAnd the power-on weight w_opCalculating the power-per-liter coefficient C of the margin-added queue InMarque_iAPAnd the boost power coefficient C of the stop pDFIG queue of the shutdown unit_iAP；

a. Calculating margin-increasing weight w_add

w_addThe margin weight value related to the environment temperature is calculated as follows:

starting weight of the shutdown unit:

w_op＝1-w_add

wherein, t_celIs the ambient temperature, w_addIs an increased margin weight value determined by the external environment temperature value, w_opIs the boot weight; the higher the ambient temperature, the higher w_addThe larger the value is, the higher the probability of increasing the power of the running unit is, in the summer environment, the probability of increasing the power of the running unit is high, and the probability of starting the unit is low; the lower the ambient temperature, w_addThe smaller the value, w_opThe larger the value is, the higher the probability of starting the shutdown unit is, and the probability of starting the shutdown unit is improved at low temperature in winter, so that the unit can be started to operate as much as possible, the internal environment temperature of the unit is improved, and the problem that various liquids in the fan are frozen in the low-temperature environment can be effectively solved;

b. calculating the power coefficient per liter C of the margin-added queue InMarque_iAP

Calculating margin increasing coefficient of margin increasing queue unit

Wherein, C_iaddThe larger the value of the margin coefficient is, the larger the margin value of the unit is, and the more the power value which can be improved by the unit is; p_iNThe rated power value and the unit parameter of the unit;

second, the power coefficient per liter of the computer set C_iAP

C_iAP＝w_add*C_iadd

Wherein, w_addThe weight value is the margin increasing weight value and is determined by the environment temperature; c_iaddIs the margin coefficient, C_iAPThe larger the value of the power-rise coefficient is, the larger the probability of the unit for increasing the power is. The capacity of the unit for increasing power is not only related to the margin power value of the unit, but also related to the ambient temperature, C_iAPIs an integrated coefficient value.

c. Calculating the liter power coefficient C of the stop DFIG queue of the shutdown unit_iAP

Calculating margin increasing coefficient of shutdown unit queue

Wherein: c_iaddIs the margin coefficient, w_spIs a control strategy constant value parameter, which takes the starting delay coefficient into consideration as a constant value, 0<w_sp<1, the unit needs a certain running time from a shutdown state to a running state, and the running power of the unit cannot reach P in the next period_imaxBut is w_spP_imax。

Calculating the starting coefficient C of the stop unit queue_ioc

For a shutdown unit, the power-up capacity of a fan needs to be considered, the unit with the large power-up capacity is selected, the number of the startup units can be reduced, the shutdown time of the unit also needs to be considered, the startup operation cannot be performed on the unit which is just shut down, the frequent startup of the unit is avoided, the service life of the fan is shortened, the two factors are comprehensively considered, the startup coefficient of the unit is calculated in a weighting mode, and the larger the startup coefficient value is, the larger the relative probability that the unit enters the startup operation from the shutdown state is;

wherein, w_stThe weight value of the downtime is a control strategy fixed value parameter; w is a_paThe weight value of margin increase is a control strategy parameter fixed value; c_iocThe starting coefficient of the shutdown unit queue is obtained through calculation;

C_istthe method is characterized in that the accumulative shutdown time coefficient of the unit is (0,1) in a value range, and represents the proportion of the unit between accumulative shutdowns within 30 days, and the calculation method comprises the following steps:

wherein, t_istopThe accumulated shutdown time of the ith unit in the unit of hour and t is nearly 30 days_ref720 is a fixed value;

C_ispthe unit potential margin increasing coefficient has a value range of (0,1) and represents the power increasing capacity of the shutdown unit for starting, and the calculation method comprises the following steps:

C_ispis the potential margin increasing coefficient of the ith unit;

third, calculating the power coefficient per liter of the shutdown unit_iAP

C_iAP＝w_op*C_ioc

Wherein, w_opIs the power-on weight, determined by the ambient temperature, C_iocIs the calculated starting coefficient of the unit, C_iAPIs the power per liter coefficient; the power-up coefficient of the shutdown unit is related to the current ambient temperature, the predicted power value of the unit and the shutdown time of the unit, and is a comprehensive coefficient value.

4.1.3) generating boosted Power queues IncrPwque

a. Counting the power-up capacity sum _ incPw of the margin-increased InMarque queue unit and the queue unit meeting the stopping time StopG _ sc;

firstly, the power-rise capacity of all the units in the margin-increased InMarque queue is counted

sum_incPw1＝∑(P_imax-P_imea)，i∈InMarque

sum _ incPw1 is the power-up capacity of all units in the margin-increased InMarque queue;

secondly, counting the power-up capacity of all the units of the shutdown queue StopG _ sc meeting the shutdown time

sum_incPw2＝∑P_imax，i∈StopG_sc

sum _ incPw2 is the power-up capability value of all units in the shutdown queue that meet the shutdown time Stopg _ sc queue;

the statistic margin-increasing InMarque queue unit operates according to the predicted maximum power, the requirement that the shutdown time StopG _ sc queue unit operates to the predicted maximum power to improve the power value is met:

sum_incPw＝sum_incPw1+sum_incPw2

sum _ incPw is the margin-increased InMarque queue and the total power-rise capacity value of the set meeting the downtime StopG _ sc;

b. comparing sum _ incPw with the required boost value Δ P_Fset

Comparing the unit power-per-liter capacity value sum _ incPw with the power-per-liter demand value delta P_FsetThere are two cases: in the first case, if sum _ incPw is ≧ Δ P_FsetThe power increasing is carried out on the operating unit InMarque, the requirement of the power increasing can be met by starting the unit StopG _ sc according to the stop time, the unit which does not meet the stop time does not need to be started, and the frequent starting of the fan is avoided; in the second case, if sum _ incPw < Δ P_FsetThe power-up requirement can be met only by carrying out the power-up operation on the units which do not meet the shutdown time StopG _ nsc, the higher priority is realized along with the dispatching power target, and the power can be improved to the dispatching target value only by carrying out the power-up operation on part or all of the units in the StopG _ nsc with shorter shutdown time.

c. In the first case sum _ incPw ≧ Δ P_FsetOf (2) a

The starting operation of the StopG _ nsc queue unit which does not meet the shutdown time is not needed;

Startque＝StopG_sc+Null＝StopG_sc

StopG _ sc is a unit queue with long downtime in the shutdown queue and meeting the shortest downtime, and Startque is a startup queue.

d. For the second case sum _ incPw < Δ P_FsetOf (2) a

The method comprises the steps that the condition that the starting operation needs to be carried out on a stop _ nsc queue unit selection unit which does not meet the stopping time is shown, the stopping time of the stop _ nsc queue unit which does not meet the stopping time does not reach the set value of the shortest stopping time, the starting operation is carried out at the moment, the service life of the unit is not facilitated, the higher priority is carried out along with the target value of scheduling power, the stop _ nsc queue unit is still selected to carry out the starting operation under the working condition, the stop _ nsc queues are sorted according to the stopping time, and the unit with long stopping time is started preferentially; selecting StopG _ nsc units in sequence, accumulating the units on the basis of sum _ incPw, converting the shutdown state into the grid-connected state and improving the power value P_imaxUntil sum _ incPw is more than or equal to delta P_Fset(ii) a The selected unit and the StopG _ nsc queue jointly form a Startque which can be started;

startque ═ StopG _ sc + StopG _ nsc (partial or complete unit)

Startque is a bootable queue;

e. for margin-increased queue InMarque unit according to margin-increased coefficient C_iaddSequencing from big to small; starting up the Startque unit of the starting up queue according to the starting up coefficient C_iocSorting from big to small;

f. the margin-increased queue InMarque and the Startque jointly form a boost power queue IncrPwque

IncrPwque＝InMarque+Startque

IncrPwque is a boost power queue, and the unit in the queue is according to a boost power coefficient C_iAPSorting the values in the order from big to small; according to the liter power coefficient C of the unit in the IncrPwque queue_iAPAfter sequencing, the unit which does not meet the starting time is started, so that the unit can increase powerThe force is greatly improved, and the original power increasing unit can meet the requirement without power increasing; therefore, the power of all the units in the IncrPwque queue is not required to be increased, and the units are sequentially selected to be increased or started according to the judgment of the state of the fan until the power increasing requirement delta P is met_Fset。

4.1.4) selecting a machine group from IncrPwque queues to generate to-be-adjusted queue Regque

The power-up capacity of a single unit in the IncrPwque queue is calculated, and the calculation methods of the InMarque queue from the margin-added queue and the Startque queue from the startup queue are different.

The calculation method for the queue from InMarque is as follows:

P_iw＝w_incrm*(P_imax-P_imea)

w _ incrm is the power increasing weight of the margin increasing queue, w _ incrm is more than 0 and less than or equal to 1 is a control strategy fixed value parameter, P is_iwThe power rise capacity after weight calculation;

the calculation method for the queue from Startque is as follows:

P_iw＝w_sp1*P_imax

w _ sp1 is the power increasing weight of the starting unit, w _ sp1 is more than 0 and less than or equal to 1 is a control strategy fixed value parameter, P is_iwThe power rise capacity after weight calculation;

for the machine sets in the IncrPwque queue, sequentially selecting the machine sets to perform power accumulation P_iwUp to Σ P_iw≥|ΔP_fsetGenerating a queue Regque to be regulated;

calculating the margin increasing coefficients of all the units in the Regque queue, and:

sum_Ciadd＝∑C_iadd(i∈ReRegque)

C_iaddthe margin increasing coefficient of a single unit set, and sum _ Ciadd is the sum of the margin increasing coefficients of all the unit sets of the Regque queue.

4.1.5) Power distribution to units in Regque queue

The Regque queue unit is a unit selected from the IncrPwque queue, some units come from an allowance increasing queue InMarque, and some units come from a start queue Startque.

a. Firstly, distributing the ascending power value of the unit in the Startque of the starting machine queue, sequentially scanning the unit in the regque queue, and if the unit is from the Startque of the starting machine queue:

sum_Pset_st＝∑dP_iset(i ∈ set from Startque queue in Reque)

C_iaddIs the margin coefficient of the unit, sum _ Ciadd is the sum of the power-up coefficients of all units in the Regque queue, dP_isetThe sum _ Pset _ st is the sum of all boosted power change values from the Startque queue in the Regque queue;

b. calculating the power to be distributed of other units (namely the unit selected from the margin-increased InMarque queue) remaining in the Regque queue:

sum_Pset_rm＝ΔP_fset-sum_Pset_st

sum _ Pset _ rm is the remaining power value that needs to be allocated to the unit from the InMarque queue;

counting the margin increasing coefficient values of all the units from the InMarque queue in the queue:

sum_Ciadd_rm＝∑C_iaddi belongs to InMarque queue unit in the Regque queue

C_iaddIs the margin increasing coefficient of the unit, sum _ Ciadd _ rm is the sum of the margin increasing coefficients of all the units from InMarque in the Regque queue, dP is the theoretical distribution power value, dP_isetThe power value needing to be increased is distributed to a single machine after the overshoot is considered, and if the power of the fan is increasedAfter dP is added, the power is increased to be higher than the rated power, and the maximum power value which can be increased is P_iN-P_imea。

c. Counting power increasing values calculated by all the units in the Regque queue to be adjusted:

sum_dPiset＝∑dP_iset(i∈ReRegque)

remaining unallocated power:

extra _ detapfset is the remaining unallocated power;

for the unit, P_imaxThe maximum active power value of the unit is considered, and the actual power of the unit in the next period can exceed P_imaxThe value is that the residual power value is averagely distributed to a Regque unit;

dP_iextra＝extra_detapfset/mr

dP_iset+＝dP_iextra

mr is the number of Regque queue banks, dP_iextraIs the power value, dP, of the residual unallocated power evenly distributed to each unit_isetAnd allocating power change values for the final strategy.

In the step 4), in the power reduction distribution strategy, the output power value of the wind farm is reduced, and the purpose of reducing the full-farm output power is achieved mainly by performing power limiting operation on the running unit which is being connected to the grid or performing shutdown operation on the running unit which is being connected to the grid, as shown in fig. 5.

For a running unit, power-limited operation can be directly performed on the unit, but the unit is shut down, the factor of the running time of the unit needs to be considered, for the unit with longer running time, the shut down does not have great influence on the unit, but if some units only run for shorter time, the unit is shut down at the moment, the unit is frequently started and stopped, the service life of unit components is influenced, so that the unit which runs soon is not shut down as much as possible, but has higher priority level along with a scheduling target value, and for the unit with shorter running time, the special working condition that the scheduling value can be met only by shutting down the unit, and the unit with shorter running time is also shut down.

The power-down allocation strategy comprises the following steps:

4.2.1) according to the current state of the fan, carrying out hierarchical classification on the whole fan:

only the running unit has the power reduction capability, the shutdown unit cannot perform the power reduction operation any more, the running unit is divided into a unit with longer startup time and a unit with shorter startup time and without startup time according to different running times and different control strategy processing modes, and a classification schematic diagram is shown in fig. 6.

All fans in the whole field: all the fans of the wind power plant can be divided into a controllable unit queue and an uncontrollable unit queue according to the states of the fans;

a controllable unit queue: the main control of the fan can execute the issued control command, and the fan is divided into a running unit queue and a shutdown unit queue according to the grid-connected state.

An uncontrollable unit queue: the unit and the benchmark fan in the fault.

The running unit queue RunDFIG is a unit which is connected to the grid for generating power, and is divided into a queue RunG _ Sst which meets the starting time and a queue Unhaltque which does not meet the starting time according to the starting running time of the unit.

Meeting the requirement of a unit queue RunG _ Sst at the starting time:

the operation time of the grid-connected machine set is longer,

is the starting time of the unit in the period;

the minimum starting time is a set value of a control strategy; the running time of the starting up reaches the requirement of the shortest time, and the unit canThe system is used for stopping the fan, and the service life of the fan cannot be greatly influenced by the stopping of the unit.

The unit queue Unhalsque does not meet the starting time:

the operation time of the grid-connected machine set is short,

is the starting time of the unit in the period,

is the minimum boot time; the starting operation time does not meet the requirement of the shortest time, the unit stopping is not beneficial to the service life of the unit, the unit is not stopped for the part of the unit as much as possible on the premise of meeting the power reduction requirement, but the unit has higher priority following the scheduling target value, and in order to meet the scheduling target value, the strategy can also perform the stopping operation on the unit under the special working condition. For the units in the Unhalque queue according to the starting time

The units are sorted in the order from big to small, the unit with long startup running time is arranged in front, and the unit is shut down preferentially.

4.2.2) calculating a shutdown operation weight and a reduced power weight according to the environment temperature, and calculating shutdown coefficients C of all the units in the running unit RunDFIG queue_iscAnd a margin reduction coefficient C_isub。

The shutdown operation weight w _ tst is a weight value considering temperature factors, and the calculation method is as follows:

w_tre＝1-w_tst

wherein, t_celIs the temperature of the external environment, w_tstIs the shutdown weight, w_treThe power down weight is determined by the environmentThe temperature-determined parameter value ensures that the ambient temperature in the unit is high and the liquid in the unit is prevented from freezing when the unit keeps running in a low-temperature environment in winter, and at the moment, the unit is low in shutdown weight, low in shutdown probability and high in reduced-power running probability;

coefficient of shutdown C_iscThe calculation method is as follows:

the shutdown coefficient of the unit comprehensively considers the running time of the unit, the shutdown margin and the adjustment margin of the unit, and weights the three influence factors to calculate the shutdown coefficient, wherein the calculation method comprises the following steps:

wherein, w_rtIs a weight of the accumulated running time, w_prIs the weight of the margin of shutdown, w_rmThe three weights are all control strategy fixed values;

C_irtis the cumulative operating time coefficient, C, of the last 30 days_irt＝t_irun/t_ref，t_irunThe running time of the unit is accumulated in nearly 30 days, and communication is obtained; t is t_refIs a fixed value of 720 hours;

C_irpis a shutdown margin reduction coefficient representing the power capability of the unit which can be reduced by selective shutdown, C_irp＝P_imea/P_iN，P_imeaThe measured power of the unit is obtained through communication; p_iNIs the rated power value of the unit;

C_irmis the adjustment margin coefficient of the unit, C_irm＝1-P_imax/P_iN，P_imaxIs the predicted maximum power value, P, of the unit_iNIs the rated power value of the unit;

margin reduction coefficient C_isubThe calculation method is as follows:

C_isubindicating machine setThe margin reduction coefficient has the value range of (0,1) C_isubThe larger the value is, the stronger the power reduction capability of the unit is, the unit P_imea＞P_iminMeans that the output power can be changed from P by limiting the power operation_imeaControl to P_imin(ii) a When P is present_imea≤P_iminPerforming a weighting operation, w_prIs the weight of the shutdown margin reduction, the control strategy constant value, w_rmThe weight value of the margin is adjusted, and the weight value is a fixed value of the control strategy; p_imeaIs the measured power of the unit; p_iminThe minimum power operation value and the strategy fixed value of the unit; p_iNIs the rated power value of the unit.

4.2.3) generating a stoppable train Haltque and according to the stop factor C_iscThe sorting is done from large to small.

a. And counting the shut-down of the runG _ Sst queue of the unit meeting the startup running time, and counting the total power reduction capacity Sum _ mosstPw of the Unhalsque queue of the unit not meeting the startup time running according to the minimum power.

Firstly, the power reduction capability of the shut-down of a running _ Sst unit queue meeting the startup time queue is counted:

mostPw1＝∑P_imea，i∈RunG_Sst

P_imeathe measured power of the unit is obtained through communication; mostPw1 is the sum of power reduction capacity of all the units in the RunG _ Sst queue, and represents a power value which can be reduced after the units are shut down from a grid-connected operation state;

secondly, counting the power reduction capacity value of the Unhalsque queue unit which does not meet the requirement of running according to the minimum power:

mostPw2＝∑P_iw，i∈Unhaltque

P_imeathe measured power of the unit is obtained through communication; p_iminThe minimum power operation value and the strategy fixed value of the unit; p_iwThe power reduction capability of a single unit is reduced from the current power value to the minimum powerA derating value of operation; mostPw2 is the total power reduction capability of all units in the Unhalque queue operating according to the lowest power;

and (3) counting the total power reduction capacity of the two units:

Sum_moststPw＝moststPw1+moststPw2

sum _ moststPw is the Sum of power reduction capacity of a unit which meets the requirement of shutdown time and a unit which does not meet the requirement of the shutdown time and operates according to the minimum power;

the power down control strategy is divided into two cases: in the first case, Sum _ mosstPw ≧ Δ P_fsetThe unit with longer running time is shut down, the unit with shorter running time runs the reduced power according to the minimum power, the power reduction requirement is met, and the shutdown of the Unhalque queue unit with short startup time is not needed; in the second case, Sum _ mosstPw < | Δ P_fsetIf the reduced power cannot reach the reduced power target value, the Sum _ moststPw has higher priority along with a scheduling value, and the unit which runs soon must be stopped to meet the reduced power requirement, so that the unit may be started and stopped frequently, and the unit in an Unhalque queue needs to be selected to be stopped;

b. first case Sum _ mosstPw ≧ P_fsetThe construction method of the Haltque of the I stoppable queue is as follows:

at the moment, as long as the running of the RunG _ Sst unit queue is stopped, the Unhalsque queue unit runs according to the minimum power, the power reduction requirement can be met, and the queue can be stopped

Haltque＝RunG_Sst

Haltque is a queue capable of being shut down, and the shutdown operation of a unit in an Unhalque queue is not needed;

c. second case Sum _ mosstPw < | Δ P_fsetThe method for constructing the Haltque of the stoppable queue comprises the following steps:

at the moment, the unit in the Unhalsque queue with short running time of the starting-up machine needs to be stopped, the service life of the unit is not facilitated, but the follow-up scheduling value has higher priority; the Unhalque queue is sorted according to the running starting running time, the starting time is shorter, the shutdown is impossible, the unit is prevented from frequently starting and stopping to the maximum extent, the Unhalque unit is selected in sequence to perform shutdown operation until the power reduction requirement is met, and a shutdown queue Haltque is formed;

haltque is RunG _ Sst + Unhalque (partial unit or whole unit)

Haltque is a queue capable of being shut down, and a machine group in the Unhaltque queue needs to be shut down;

d. the stoppable Haltque queue is according to the stop coefficient C_iscThe sequencing is carried out from large to small, the probability of the shutdown of the unit arranged in front is high, the queue to be shutdown RdyHaltque1 is selected from the queue capable of being shutdown, and the higher the shutdown coefficient is, the higher the shutdown probability is.

4.2.4) generating ready-to-shutdown rdyheltque 1 queue and pending queue toasigque, rdyheltque 1 queue unit selection from the halsque queue.

a. Counting the minimum power P of the unit in the RunDFIG queue_iminIn operation, the power that can be reduced:

Sum_redupow＝∑P_iw，i∈RunDFIG

P_imeathe measured power of the unit is obtained through communication; p_iminThe minimum power operation value and the strategy fixed value of the unit; p_iwThe power reduction capability of the single machine set is reduced from the current power value to the power reduction value which operates according to the minimum power; sum _ redupow is the total power reduction capability of all the banks of the RunDFIG queue operating at the lowest power.

There are two cases at this time, the first case is Sum _ redupow ≧ P_fsetL, representing operating the unit at minimum power P_iminThe power reduction requirement can be met by running without stopping the unit; the second case is Sum _ redupow < | P_fsetI, representing that the machine set is required to be stopped certainly, and selecting the machine set required to be stopped from a Haltque queue;

b. first case Sum _ redupow ≧ P_fsetProcessing of | in which case there is no need forThe unit stops, and the unit queue to be stopped is Null;

RdyHaltque1＝Null

rdyheltque 1 is a ready to shutdown queue;

c. second case Sum _ redupow < | P_fsetThe processing of |, indicates that the unit must be shut down, and the unit needs to be selected from Haltque to be shut down, so that the power reduction requirement can be met:

Sum_totalpow＝Sum_reduPow

sequentially selecting the unit from the Haltque queue to carry out shutdown accumulation, wherein the accumulated value is the power which can be reduced when the unit is changed from the minimum running power to the shutdown state until Sum _ total ═ DeltaP_fsetObtaining a unit ready to shutdown RdyHaltque 1:

RdyHaltque 1-Haltque (partial or complete unit)

Rdyheltque 1 is a ready to shutdown queue;

d. in the statistics ready-to-stop unit queue rdyheltque 1, the unit is converted from a grid-connected operation state to a stop state, and the unit stops and can reduce power:

Sum_selstpow＝∑P_imea，i∈RdyHaltque1

P_imeathe measured power of the unit is obtained through communication, and Sum _ selstpow is the power value which can be reduced when the unit stops in the RdyHaltque1 queue;

removing RdyHaltque1 queue machine set from the RunDFIG queue, and forming a queue ToAssignque to be operated by the remaining machine set, wherein the power value required to be reduced by the ToAssignque queue is as follows:

ToAssignque＝RunDFIG-RdyHaltque1

Sum_assign＝|ΔP_fset|-Sum_selstpow

sum _ assign is the power that needs to be dropped by the queue to be operated;

e. calculating the power which can be reduced when all the units of the ToAssignque queue operate according to the lowest power

Sum_oprpow＝∑P_wi，i∈ToAssignque

P_imeaThe measured power of the unit is obtained through communication; p_iminThe minimum power operation value and the strategy fixed value of the unit; the w _ rre power reduction coefficient is a strategy fixed value, the value range is (0,1), and the power reduction coefficient is introduced in consideration of the limitation of the main control power reduction rate; p_wiAfter the power reduction coefficient is considered, the power reduction capability of the unit is considered; sum _ oprnow is in the ToAssignque queue so that the unit can operate at the minimum power to reduce the power, and there are two cases: the first condition is that Sum _ oprnow is less than Sum _ assign, which indicates that all the units in the queue can meet the power reduction requirement when running according to the lowest power, and the second condition is that Sum _ oprnow is more than or equal to Sum _ assign, which indicates that the units cannot run to the minimum power quickly after the main control execution efficiency is considered, and the units need to be shut down;

f. for the processing that Sum _ oprnow is less than Sum _ assign under the first condition, the ToAssignque unit runs according to the minimum power, the power reduction requirement is met, and the unit does not need to be shut down:

RdyHaltque2＝Null

RdyReduque＝ToAssignque

RdyHaltque2 is the queue ready to be stalled in pending queue ToAssignque, and RdyReduque is the queue ready to be derated in pending queue ToAssignque.

g. And (4) processing the second case that Sum _ oprnow is more than or equal to Sum _ assign, wherein in the case, the ToAssignque unit needs to be selected for shutdown operation.

According to the state judgment of each unit in the ToAssignque queue, dividing the unit into a pre-shutdown queue Haltgroup and a pre-reduced power queue, wherein the judgment method comprises the following steps:

redugroup addition for unit

else if(P_imea＜P_min)

Machine group adding Haltgroup

else

if(J_ist＞J_ire)

Machine group adding Haltgroup

else

Redugroup addition for unit

Wherein,

representing the starting time of the unit;

the minimum starting time of the unit is set as a control strategy value; p_imeaThe actual power value of the unit is obtained through communication; p_iminIs the minimum operating power of the unit; j. the design is a square_istIs a unit shutdown operation judgment coefficient; j. the design is a square_ireThe unit power reduction operation judgment coefficient; haltgroup is a pre-shutdown queue; redugroup is a pre-reduction power queue;

unit stop operation judgment coefficient J_istThe calculation method is as follows;

J_ist＝w_tst*C_isc

w _ tst is the shutdown operation weight; c_iscIs the unit shutdown factor; j. the design is a square_istIs a unit shutdown operation judgment coefficient;

judging coefficient J of unit power reduction operation_ireThe calculation method is as follows:

J_ire＝w_tre*C_isub

w _ tre is a power down operation weight; c_isubIs the unit derating coefficient; j. the design is a square_istThe unit power reduction operation judgment coefficient;

Sum_all＝Sum_oprpow

sequentially selecting the units in the Haltgroup to be stopped from running to increase the power, and accumulating the power until Sum _ all > | delta P_fsetThe selected unit forms a ready-to-stop queue RdyHaltque2, and the rest units form a power queue RdyReduque to be reduced;

RdyHaltque2 Haltgroup (partial or complete unit)

RdyReduque＝ToAssignque-RdyHaltque2

h. Calculating the required reduced power for rdyreeque queues:

calculating the power that would be reduced by shutting down the crew in both Ready to shutdown queue 1RdyHaltque1 and Ready to shutdown queue 2RdyHaltque 2:

P_halt＝∑P_imea,i∈RdyHaltque1∪i∈RdyHaltque2

P_haltthe total power level may be reduced after shutdown queues RdyHaltque1 and RdyHaltque2 are shutdown.

For the RdyReduque queue unit, the power reduction value is as follows:

the above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims (2)

1. A control method of an automatic power generation system of a wind power plant is characterized by comprising the following steps: the method includes that an automatic power generation system of a wind power plant obtains a wind field dispatching target value through a communication management machine, a gateway table of the wind power plant is detected to obtain wind field internet power, relevant information of a main control of a fan is collected, after all collected information is calculated and judged, an active power control command is issued to each fan unit, and the main control receives and executes the power control command, so that the purpose that the actual wind field internet power follows the dispatching target value is achieved; which comprises the following steps:

1) collecting, scheduling and issuing a full-field control command value and a wind power plant grid-connected point power value, and calculating a difference value between a target value and an actual value:

ΔP＝P_Gref-P_farm

wherein: p_GrefIs a scheduling control target value; p_farmThe grid-connected point gateway meter is an actually measured grid-connected power value of the wind power plant; Δ P is the power difference between the target value and the actual value;

2) limiting wind farm active power rate of change

In order to prevent large fluctuation of the full-field power, the power change rate of the wind power plant is limited within 1min and 10min, and the power difference value after the power change rate is limited is delta P_Fset；

ΔP_Fset＝limit(ΔP)

Wherein: Δ P is the power difference between the target value and the actual value; delta P_FsetIs the power difference after 1 minute, 10 minute rate of change limit;

3) determination of Δ P_FsetWhether the dead zone range is included, if the dead zone range is included, the step 5) is executed, and if the dead zone range is not included, the step 4) is executed;

4) if Δ P_FsetWhen the grid power value is larger than delt, the grid power value is smaller than the target value, the output of the wind power plant needs to be increased, a power-per-liter distribution strategy is executed, and the dP of each unit is calculated_iset(ii) a If Δ P_FsetAnd (4) delt represents that the power value of the internet is higher than the dispatching target value, the output of the wind power plant needs to be reduced, a power reduction distribution strategy is executed, and the dP of each unit is calculated_iset(ii) a Where delt is a control strategy parameter fixed value, representing an execution dead zone value; dP_isetIs the power variation value of a single unit;

in the power-up distribution strategy, for the fan, in order to achieve the purpose of increasing the whole on-line power, the whole power can be increased by performing power-up operation on the running unit and the unit with the predicted power of the next period greater than the actual power, or performing start-up operation on the unit which is stopped;

the power-up allocation strategy comprises the following steps:

4.1.1) hierarchical classification of full-scale wind turbines

In order to increase the power of the whole field, the power-up operation can be performed only on the units meeting the conditions, or the units being stopped are subjected to the starting operation, so that the units need to be classified to find out the units with the power-up capability, specifically as follows:

all fans in the whole field: all fans of the wind power plant are divided into a controllable unit CtrlDFIG queue and an uncontrollable unit queue according to the states of the fans;

controllable unit CtrlDFIG queue: the method comprises the steps that a fan main control unit can execute a control command of an automatic power generation system of the wind power plant, and the fan main control unit is divided into a running unit RunDFIG queue and a stopping StopDFIG queue according to the grid connection state of the fan;

an uncontrollable unit queue: the unit and the benchmark fan are in fault;

running a unit RunDFIG queue: the method refers to comparing the maximum active power P of a fan by a unit in grid-connected power generation_imaxAnd measured power P_imeaThe size can divide the unit into an allowance increasing queue InMarque queue and an allowance increasing queue;

stopping the unit stop fifo queue: the method comprises the steps that a wind power plant automatic power generation system controls a unit to stop, and the unit is divided into a StopG _ sc queue with long stopping time and meeting the stopping time and a StopG _ nsc queue with short stopping time and not meeting the stopping time according to the stopping time of a fan;

margin-added queue InMarque: refers to P in running unit RunDFIG queue_imax＞P_imeaSet of (P)_imaxThe maximum active power which can be output by the unit, namely the predicted power of the wind turbine generator at the current wind speed is calculated by a wind power system according to the state of the fan and the current wind speed information, P_imeaIs the measured power, P, of the unit_imax＞P_imeaThe maximum active power value of the fan is larger than the actual measurement power, the representative unit has the power increasing capacity, and the power generation power in the period is P_imeaThe output power of the next cycle can be increased to P_imax；

The requirement of the downtime unit StopG _ sc is met: means in the stop pDFIG queue of the shutdown unit

The air conditioning system comprises a machine set and a control system,

the communication manager acquires master control information to obtain the time when the unit is stopped;

the shortest downtime of the unit is set as a control strategy parameter value;

the unit which has the shutdown time longer than the shortest shutdown time is shown, and the startup operation of the unit at the moment can not generate great influence on a hardware system of the fan;

the down time set StopG _ nsc is not satisfied: means in the stop pDFIG queue of the shutdown unit

The air conditioning system comprises a machine set and a control system,

is the unit down time;

is the shortest downtime, is the control strategy fixed value,

the unit which indicates that the unit has stopped for less than the shortest stop time has short stop time, and the start-up operation is not required as much as possible in a short period, otherwise, the unit is frequently started and stopped, and the service life of unit hardware is not facilitated; sorting the units in the queue according to the downtime from long to short, arranging the units with long downtime in front, and starting the unit preferentially;

4.1.2) calculating a temperature-dependent margin weight w_addAnd the power-on weight w_opCalculating the power-per-liter coefficient C of the margin-added queue InMarque_iAPAnd the boost power coefficient C of the stop pDFIG queue of the shutdown unit_iAP；

a. Calculating margin-increasing weight w_add

w_addThe margin weight value related to the environment temperature is calculated as follows:

starting weight of the shutdown unit:

w_op＝1-w_add

wherein, t_celIs the ambient temperature, w_addIs an increased margin weight value determined by the external environment temperature value, w_opIs the boot weight; the higher the ambient temperature, the higher w_addThe larger the value is, the higher the probability of increasing the power of the running unit is, in the summer environment, the probability of increasing the power of the running unit is high, and the probability of starting the unit is low; the lower the ambient temperature, w_addThe smaller the value, w_opThe larger the value is, the higher the probability of starting the shutdown unit is, and the probability of starting the shutdown unit is improved at low temperature in winter, so that the unit can be started to operate as much as possible, the internal environment temperature of the unit is improved, and the problem that various liquids in the fan are frozen in the low-temperature environment can be effectively solved;

b. calculating the power coefficient per liter C of the margin-added queue InMarque_iAP

Calculating margin increasing coefficient of margin increasing queue unit

Wherein, C_iaddThe larger the value of the margin coefficient is, the larger the margin value of the unit is, and the more the power value which can be improved by the unit is; p_iNThe rated power value and the unit parameter of the unit;

second, the power coefficient per liter of the computer set C_iAP

C_iAP＝w_add*C_iadd

Wherein, w_addThe weight value is the margin increasing weight value and is determined by the environment temperature; c_iaddIs the margin coefficient, C_iAPThe higher the value of the power per liter coefficient is, the higher the probability of the unit for improving the power is; machine for workingThe capacity of the group to boost power is not only related to the margin power value of the unit, but also to the ambient temperature, C_iAPIs an integrated coefficient value;

c. calculating the liter power coefficient C of the stop DFIG queue of the shutdown unit_iAP

Calculating margin increasing coefficient of shutdown unit queue

Wherein: c_iaddIs the margin coefficient, w_spIs a control strategy constant value parameter, which takes the starting delay coefficient into consideration as a constant value, 0<w_sp<1, the unit needs running time from a shutdown state to a running state, and the running power of the unit cannot reach P in the next period_imaxBut is w_spP_imax；

Calculating the starting coefficient C of the stop unit queue_ioc

For a shutdown unit, the power-up capacity of a fan needs to be considered, the unit with the large power-up capacity is selected, the number of the startup units can be reduced, the shutdown time of the unit also needs to be considered, the startup operation cannot be performed on the unit which is just shut down, the frequent startup of the unit is avoided, the service life of the fan is shortened, the two factors are comprehensively considered, the startup coefficient of the unit is calculated in a weighting mode, and the larger the startup coefficient value is, the larger the relative probability that the unit enters the startup operation from the shutdown state is;

wherein, w_stThe weight value of the downtime is a control strategy fixed value parameter; w is a_paThe weight value of margin increase is a control strategy parameter fixed value; c_iocThe starting coefficient of the shutdown unit queue is obtained through calculation;

C_istthe accumulated downtime coefficient of the unit is (0,1) in the value range, which indicates that the unit is closeThe ratio between the accumulative shut-down within 30 days is calculated as follows:

wherein, t_istopThe accumulated shutdown time of the ith unit in the unit of hour and t is nearly 30 days_ref720 is a fixed value;

C_ispthe unit potential margin increasing coefficient has a value range of (0,1) and represents the power increasing capacity of the shutdown unit for starting, and the calculation method comprises the following steps:

C_ispis the potential margin increasing coefficient of the ith unit;

third, calculating the power coefficient per liter of the shutdown unit_iAP

C_iAP＝w_op*C_ioc

Wherein, w_opIs the power-on weight, determined by the ambient temperature, C_iocIs the calculated starting coefficient of the unit, C_iAPIs the power per liter coefficient; the power-up coefficient of the shutdown unit is related to the current environmental temperature, the predicted power value of the unit and the shutdown time of the unit, and is a comprehensive coefficient value;

4.1.3) generating boosted Power queues IncrPwque

a. Counting the power-up capacity sum _ incPw of the margin-increased InMarque queue unit and the queue unit meeting the stopping time StopG _ sc;

firstly, the power-rise capacity of all the units in the margin-increased InMarque queue is counted

sum_incPw1＝∑(P_imax-P_imea)，i∈InMarque

sum _ incPw1 is the power-up capacity of all units in the margin-increased InMarque queue;

secondly, counting the power-up capacity of all the units of the shutdown queue StopG _ sc meeting the shutdown time

sum_incPw2＝∑P_imax，i∈StopG_sc

sum _ incPw2 is the power-up capability value of all units in the shutdown queue that meet the shutdown time Stopg _ sc queue;

the statistic margin-increasing InMarque queue unit operates according to the predicted maximum power, the requirement that the shutdown time StopG _ sc queue unit operates to the predicted maximum power to improve the power value is met:

sum_incPw＝sum_incPw1+sum_incPw2

sum _ incPw is the margin-increased InMarque queue and the total power-rise capacity value of the set meeting the downtime StopG _ sc;

b. comparing sum _ incPw with the required boost value Δ P_Fset

Comparing the unit power-per-liter capacity value sum _ incPw with the power-per-liter demand value delta P_FsetThere are two cases: in the first case, if sum _ incPw is ≧ Δ P_FsetThe method comprises the steps that the margin increasing unit InMarque is subjected to power rise, the requirement of the power rise can be met by starting the unit StopG _ sc with the downtime, the unit which does not meet the downtime does not need to be started, and the frequent starting of a fan is avoided; in the second case, if sum _ incPw < Δ P_FsetIndicating that the power-up requirement can be met only by carrying out the power-on operation on the units which do not meet the shutdown time StopG _ nsc, the units have higher priority following the scheduling power target, and the power can be increased to the scheduling target value only by carrying out the power-on operation on part or all of the units in the StopG _ nsc with short shutdown time;

c. in the first case sum _ incPw ≧ Δ P_FsetOf (2) a

The starting operation of the StopG _ nsc queue unit which does not meet the shutdown time is not needed;

Startque＝StopG_sc+Null＝StopG_sc

StopG _ sc is a unit queue with long downtime in the shutdown queue and meeting the shortest downtime, and Startque is a startup queue;

d. for the second case sum _ incPw < Δ P_FsetOf (2) a

Representing the need to select the unit for the StopG _ nsc queue unit which does not meet the downtimeThe starting operation is carried out, the stopping time of the stopping _ nsc queue unit which does not meet the stopping time does not reach the shortest stopping time set value, the starting operation is carried out at the moment, the service life of the unit is not facilitated, but the higher priority is realized along with the dispatching power target value, the stopping _ nsc queue unit is still selected to carry out the starting operation under the working condition, the stopping _ nsc queue is sorted according to the stopping time, and the unit with long stopping time is started preferentially; selecting StopG _ nsc units in sequence, accumulating the units on the basis of sum _ incPw, converting the shutdown state into the grid-connected state and improving the power value P_imaxUntil sum _ incPw is more than or equal to delta P_Fset(ii) a The selected unit and the StopG _ nsc queue jointly form a Startque which can be started;

startque ═ StopG _ sc + StopG _ nsc (partial or complete unit)

Startque is a bootable queue;

e. for margin-increased queue InMarque unit according to margin-increased coefficient C_iaddSequencing from big to small; starting up the Startque unit of the starting up queue according to the starting up coefficient C_iocSorting from big to small;

f. the margin-increased queue InMarque and the Startque jointly form a boost power queue IncrPwque

IncrPwque＝InMarque+Startque

IncrPwque is a boost power queue, and the unit in the queue is according to a boost power coefficient C_iAPSorting the values in the order from big to small; according to the liter power coefficient C of the unit in the IncrPwque queue_iAPAfter sequencing, because the units which do not meet the starting time are subjected to starting operation, the power-up capacity of the units is greatly improved, and the original power-up units can meet the requirements without power-up; therefore, the power of all the units in the IncrPwque queue is not required to be increased, and the units are sequentially selected to be increased or started according to the judgment of the state of the fan until the power increasing requirement delta P is met_Fset；

4.1.4) selecting a machine group from IncrPwque queues to generate to-be-adjusted queue Regque

Calculating the power-up capacity of a single unit in the IncrPwque queue, wherein the calculation methods of an InMarque queue from the margin-added queue and a Startque queue from the starting queue are different;

the calculation method for the queue from InMarque is as follows:

P_iw＝w_incrm*(P_imax-P_imea)

w _ incrm is the power increasing weight of the margin increasing queue, w _ incrm is more than 0 and less than or equal to 1 is a control strategy fixed value parameter, P is_iwThe power rise capacity after weight calculation;

the calculation method for the queue from Startque is as follows:

P_iw＝w_sp1*P_imax

w _ sp1 is the power increasing weight of the starting unit, w _ sp1 is more than 0 and less than or equal to 1 is a control strategy fixed value parameter, P is_iwThe power rise capacity after weight calculation;

for the machine sets in the IncrPwque queue, sequentially selecting the machine sets to perform power accumulation P_iwUp to Σ P_iw≥|ΔP_fsetGenerating a queue Regque to be regulated;

calculating the margin increasing coefficients of all the units in the Regque queue to be adjusted, and the sum of the margin increasing coefficients is as follows:

sum_Ciadd＝∑C_iadd,i∈ReRegque

C_iaddthe margin increasing coefficient of a single unit set, and sum _ Ciadd is the sum of the margin increasing coefficients of all the units of the Regque queue;

4.1.5) Power distribution to units in Regque queue

The regque queue unit is a unit selected from an increasing power IncrPwque queue, some units come from an increasing margin queue InMarque, and some units come from a Startque;

a. firstly, distributing the ascending power value of the unit in the Startque of the starting machine queue, sequentially scanning the unit in the regque queue, and if the unit is from the Startque of the starting machine queue:

sum_Pset_st＝∑dP_iset，i∈ReRequgroup from Startque queue in e

C_iaddIs the margin coefficient of the unit, sum _ Ciadd is the sum of the power-up coefficients of all units in the Regque queue, dP_isetThe sum _ Pset _ st is the sum of all boosted power change values from the Startque queue in the Regque queue;

b. calculating the power to be distributed of other units left in the Regque queue, namely the power to be distributed of the unit selected from the margin-increased InMarque queue:

sum_Pset_rm＝ΔP_fset-sum_Pset_st

sum _ Pset _ rm is the remaining power value that needs to be allocated to the unit from the InMarque queue;

counting the margin increasing coefficient values of all the units from the InMarque queue in the queue:

sum_Ciadd_rm＝∑C_iaddi belongs to InMarque queue unit in the Regque queue

C_iaddIs the margin increasing coefficient of the unit, sum _ Ciadd _ rm is the sum of the margin increasing coefficients of all the units from InMarque in the Regque queue, dP is the theoretical distribution power value, dP_isetThe power value needing to be increased is distributed to a single machine after the overshoot is considered, if the power of the fan is increased by dP and the power is increased to be above the rated power, the maximum power value which can be increased is P_iN-P_imea；

c. Counting power increasing values calculated by all the units in the Regque queue to be adjusted:

sum_dPiset＝∑dP_iset(i∈ReRegque)

remaining unallocated power:

extra _ detapfset is the remaining unallocated power;

for the unit, P_imaxThe maximum active power which can be output by the unit is considered, and the actual power of the unit in the next period can exceed P_imaxThe value is that the residual power value is averagely distributed to a Regque unit;

dP_iextra＝extra_detapfset/mr

dP_iset+＝dP_iextra

mr is the number of Regque queue banks, dP_iextraIs the power value, dP, of the residual unallocated power evenly distributed to each unit_isetAllocating a power change value for the final strategy;

5) control strategy data output handling

5.1) pairs of dP_isetPerforming master control speed limit processing

dP_isetFor the single-machine power variation value obtained by the calculation of the distribution strategy, speed limit processing is required to be carried out, and overlarge output power fluctuation is prevented;

5.2) calculating the pre-issued power value P_iset

P_imeaIs the actual active power value of the unit, acquires the master control information, dP_isetCalculating a power variation value, P, for the allocation policy_isetIs a pre-issued power value;

5.3) output restriction processing

P_{iset_now}＝P_iset

if(P_{iset_now}≥P_iN)

P_{iset_now}＝P_iN

else if(P_{iset_now}≥P_imax+300)

P_{iset_now}＝P_iN

In the formula, P_iNRated power of the unit, P_imaxThe maximum active power which can be output by the unit in the next control period, namely the predicted power P of the ultra-short-term wind turbine generator at the current wind speed_{iset_now}Outputting the final calculated power set value to the main control fan;

6) setting the power of each fan to a value P_{iset_now}And sending the data to the master control.

2. The control method of the automatic power generation system of the wind farm according to claim 1, characterized in that: in the step 4), in a power reduction distribution strategy, reducing the output power value of the wind field, and mainly achieving the purpose of reducing the full-field output power by performing power limiting operation on the running unit which is being connected to the grid or performing shutdown operation on the running unit which is being connected to the grid;

for the running unit, the unit can be directly operated in a limited power mode, and the minimum value of the limited power is P_iminSetting parameters for strategy, if limiting its power to P_iminThe unit has the risk of shutdown; the method comprises the following steps of performing shutdown operation on a unit, considering the factor of the running time of the unit, wherein the shutdown does not have great influence on the unit for the unit with long running time, if some units run for a short time, the unit is stopped, the unit is frequently started and stopped at the moment, and the service life of unit components is influenced, so that the unit which runs soon is not stopped as much as possible, but has higher priority along with a scheduling target value, and the unit which has short running time needs to be stopped to meet the special working condition of a scheduling value, and the unit with short running time is also stopped;

the power-down allocation strategy comprises the following steps:

4.2.1) according to the current state of the fan, carrying out hierarchical classification on the whole fan:

the method comprises the following steps that only a running unit has power reduction capability, a shutdown unit cannot perform power reduction operation any more, and the running unit is divided into a unit with long startup time and meeting startup time and a unit with short startup time and not meeting startup time according to different running times and different control strategy processing modes;

all fans in the whole field: all the fans of the wind power plant divide all the units of the whole plant into a controllable unit queue and an uncontrollable unit queue according to the states of the fans;

a controllable unit queue: the main control system comprises a fan main control unit, a running unit queue and a shutdown unit queue, wherein the fan main control unit can execute a issued control command and is divided into the running unit queue and the shutdown unit queue according to a grid connection state;

an uncontrollable unit queue: the unit and the benchmark fan in fault;

running the unit queue RunDFIG: the method comprises the steps that a unit which is in grid-connected power generation is divided into a queue RunG _ Sst which meets the starting time and a queue Unhaltque which does not meet the starting time according to the starting running time of the unit;

meeting the requirement of a unit queue RunG _ Sst at the starting time:

the operation time of the grid-connected machine set is long,

is the running time of the unit after starting up;

the minimum starting time is a set value of a control strategy; the starting up running time meets the requirement of the shortest time, the unit can be shut down, and the service life of the fan cannot be greatly influenced by the shutdown of the unit;

the unit queue Unhalsque does not meet the starting time:

a unit with short grid-connected operation time,

is the running time of the unit after the unit is started,

is the minimum boot time; the starting operation time does not meet the requirement of the shortest time, the unit is stopped, the service life of the unit is not favorable, the unit is not stopped as much as possible on the premise of meeting the power reduction requirement, but the unit has higher priority following the scheduling target value, and in order to meet the scheduling target value, the strategy can also perform the stopping operation on the unit under the special working condition; for the units in the Unhalque queue according to the starting time

Sequencing from big to small, arranging the units with long startup running time in front, and preferentially stopping the units;

4.2.2) calculating a shutdown operation weight and a reduced power weight according to the environment temperature, and calculating shutdown coefficients C of all the units in the running unit RunDFIG queue_iscAnd a margin reduction coefficient C_isub：

The shutdown operation weight w _ tst is a weight value considering temperature factors, and the calculation method is as follows:

w_tre＝1-w_tst

wherein, t_celIs the temperature of the external environment, w_tstIs the shutdown weight, w_treThe power reduction weight is the power reduction weight, the shutdown weight and the power reduction weight are parameter values determined by the ambient temperature, in a low-temperature environment in winter, the unit keeps running, the ambient temperature in the unit can be ensured to be high, liquid in the unit is prevented from freezing, at the moment, the shutdown weight of the unit is low, the probability of the unit shutdown is low, and the probability of the power reduction running is high;

coefficient of shutdown C_iscThe calculation method is as follows:

the shutdown coefficient of the unit comprehensively considers the running time of the unit, the shutdown margin and the adjustment margin of the unit, and weights the three influence factors to calculate the shutdown coefficient, wherein the calculation method comprises the following steps:

wherein, w_rtIs a weight of the accumulated running time, w_prIs the weight of the margin of shutdown, w_rmThe three weights are all control strategy fixed values;

C_irtis the cumulative operating time coefficient, C, of the last 30 days_irt＝t_irun/t_ref，t_irunThe running time of the unit is accumulated in nearly 30 days, and communication is obtained; t is t_refIs a fixed value of 720 hours;

C_irpis a shutdown margin reduction coefficient representing the power capability of the unit which can be reduced by selective shutdown, C_irp＝P_imea/P_iN，P_imeaThe measured power of the unit is obtained through communication; p_iNIs the rated power value of the unit;

C_irmis the adjustment margin coefficient of the unit, C_irm＝1-P_imax/P_iN，P_imaxIs the predicted maximum power value, P, of the unit_iNIs the rated power value of the unit;

margin reduction coefficient C_isubThe calculation method is as follows:

C_isubthe value range of the coefficient of the margin reduction of the unit is (0,1) and C_isubThe larger the value is, the stronger the power reduction capability of the unit is, the unit P_imea＞P_iminMeans that the output power can be changed from P by limiting the power operation_imeaControl to P_imin(ii) a When P is present_imea≤P_iminPerforming a weighting operation, w_prIs the weight of the shutdown margin reduction, the control strategy constant value, w_rmThe weight value of the margin is adjusted, and the weight value is a fixed value of the control strategy; p_imeaIs the measured power of the unit; p_iminMachine for makingMinimum power operational value, policy fixed value of the group; p_iNIs the rated power value of the unit;

4.2.3) generating a stoppable train Haltque and according to the stop factor C_iscSorting from big to small;

a. counting the shut-down of the runG _ Sst queue of the unit meeting the startup running time, and counting the total power reduction capacity Sum _ mosstPw of the Unhalsque queue of the unit not meeting the startup time running according to the minimum power;

firstly, the power reduction capability of the shut-down of a running _ Sst unit queue meeting the startup time queue is counted:

mostPw1＝∑P_imea，i∈RunG_Sst

P_imeathe measured power of the unit is obtained through communication; mostPw1 is the sum of power reduction capacity of all the units in the RunG _ Sst queue, and represents a power value which can be reduced after the units are shut down from a grid-connected operation state;

secondly, counting the power reduction capacity value of the Unhalsque queue unit which does not meet the requirement of running according to the minimum power:

mostPw2＝∑P_iw，i∈Unhaltque

P_imeathe measured power of the unit is obtained through communication; p_iminThe minimum power operation value and the strategy fixed value of the unit; p_iwThe power reduction capability of a single unit is that the current power value is reduced to a power reduction value which operates according to the minimum power; mostPw2 is the total power reduction capability of all units in the Unhalque queue operating according to the lowest power;

and (3) counting the total power reduction capacity of the two units:

Sum_moststPw＝moststPw1+moststPw2

sum _ moststPw is the Sum of power reduction capacity of a unit which meets the requirement of shutdown time and a unit which does not meet the requirement of the shutdown time and operates according to the minimum power;

the power down control strategy is divided into two cases: first case，Sum_moststPw≥|ΔP_fsetThe unit with long running time is shut down, the unit with short running time runs the reduced power according to the minimum power, the power reduction requirement is met, and the unit with short starting time and the Unhalque queue unit do not need to be shut down; in the second case, Sum _ mosstPw < | Δ P_fsetIf the reduced power cannot reach the reduced power target value, the Sum _ moststPw has higher priority along with a scheduling value, and the unit which runs soon must be stopped to meet the reduced power requirement, so that the unit may be started and stopped frequently, and the unit in an Unhalque queue needs to be selected to be stopped;

b. first case Sum _ mosstPw ≧ P_fsetThe construction method of the Haltque of the I stoppable queue is as follows:

at the moment, as long as the running of the RunG _ Sst unit queue is stopped, the Unhalsque queue unit runs according to the minimum power, the power reduction requirement can be met, and the queue can be stopped

Haltque＝RunG_Sst

Haltque is a queue capable of being shut down, and the shutdown operation of a unit in an Unhalque queue is not needed;

c. second case Sum _ mosstPw < | Δ P_fsetThe method for constructing the Haltque of the stoppable queue comprises the following steps:

at the moment, the unit in the Unhalsque queue with short running time of the starting-up machine needs to be stopped, the service life of the unit is not facilitated, but the follow-up scheduling value has higher priority; the Unhalque queue is sorted according to the running starting running time, the starting time is shorter, the shutdown is impossible, the unit is prevented from frequently starting and stopping to the maximum extent, the Unhalque unit is selected in sequence to perform shutdown operation until the power reduction requirement is met, and a shutdown queue Haltque is formed;

haltque is RunG _ Sst + Unhalque (partial unit or whole unit)

Haltque is a queue capable of being shut down, and a machine group in the Unhaltque queue needs to be shut down;

d. the stoppable Haltque queue is according to the stop coefficient C_iscSequencing from big to small, the probability of the unit arranged in front is large, and the queue to be shut down RdyHaltque1 is bound to be stopped from the possible stopSelecting from the machine queue Haltque, wherein the higher the shutdown coefficient is, the higher the shutdown probability is;

4.2.4) generating ready-to-shutdown RdyHaltque1 queue and pending queue ToAssignque, and the unit in the RdyHaltque1 queue selects from the Haltque queue;

a. counting the minimum power P of the unit in the RunDFIG queue_iminIn operation, the power that can be reduced:

Sum_redupow＝∑P_iw，i∈RunDFIG

P_imeathe measured power of the unit is obtained through communication; p_iminThe minimum power operation value and the strategy fixed value of the unit; p_iwThe power reduction capability of the single machine set is reduced from the current power value to the power reduction value which operates according to the minimum power; sum _ redupow is the total power reduction capability of all the units of the RunDFIG queue according to the minimum power operation;

there are two cases at this time, the first case is Sum _ redupow ≧ P_fsetL, representing operating the unit at minimum power P_iminThe power reduction requirement can be met by running without stopping the unit; the second case is Sum _ redupow < | P_fsetI, representing that the machine set is required to be stopped certainly, and selecting the machine set required to be stopped from a Haltque queue;

b. first case Sum _ redupow ≧ P_fsetProcessing |, at this time, the unit does not need to be stopped, and the unit queue to be stopped is Null;

RdyHaltque1＝Null

rdyheltque 1 is a ready to shutdown queue;

c. second case Sum _ redupow < | P_fsetThe processing of |, indicates that the unit must be shut down, and the unit needs to be selected from Haltque to be shut down, so that the power reduction requirement can be met:

Sum_totalpow＝Sum_reduPow

sequentially selecting the units from the Haltque queue to perform shutdown accumulationAdding the accumulated value to the power which can be reduced when the unit is changed from the minimum operation power to the shutdown state until Sum _ total ═ DeltaP_fsetObtaining a unit ready to shutdown RdyHaltque 1:

RdyHaltque 1-Haltque (partial or complete unit)

Rdyheltque 1 is a ready to shutdown queue;

d. in the statistics ready-to-stop unit queue rdyheltque 1, the unit is converted from a grid-connected operation state to a stop state, and the unit stops and can reduce power:

Sum_selstpow＝∑P_imea，i∈RdyHaltque1

P_imeathe measured power of the unit is obtained through communication, and Sum _ selstpow is the power value which can be reduced when the unit stops in the RdyHaltque1 queue;

removing RdyHaltque1 queue machine set from the RunDFIG queue, and forming a queue ToAssignque to be operated by the remaining machine set, wherein the power value required to be reduced by the ToAssignque queue is as follows:

ToAssignque＝RunDFIG-RdyHaltque1

Sum_assign＝|ΔP_fset|-Sum_selstpow

sum _ assign is the power that needs to be dropped by the queue to be operated;

e. calculating the power which can be reduced when all the units of the ToAssignque queue operate according to the lowest power

Sum_oprpow＝∑P_wi，i∈ToAssignque

P_imeaThe measured power of the unit is obtained through communication; p_iminThe minimum power operation value and the strategy fixed value of the unit; the w _ rre power reduction coefficient is a strategy fixed value, the value range is (0,1), and the power reduction coefficient is introduced in consideration of the limitation of the main control power reduction rate; p_wiAfter the power reduction coefficient is considered, the power reduction capability of the unit is considered; sum _ oprnow is in the ToAssignque queue so that the unit can operate at the minimum power to reduce the power, and there are two cases: in the first case, Sum _ oprnow <The Sum _ assign represents that all the units in the queue can meet the power reduction requirement when running according to the lowest power, and the second condition is that the Sum _ oprnow is more than or equal to the Sum _ assign represents that the units cannot run to the minimum power quickly after the master control execution efficiency is considered, and the units need to be stopped;

f. for the processing that Sum _ oprnow is less than Sum _ assign under the first condition, the ToAssignque unit runs according to the minimum power, the power reduction requirement is met, and the unit does not need to be shut down:

RdyHaltque2＝Null

RdyReduque＝ToAssignque

RdyHaltque2 is a queue ready to be shut down in the queue to be operated ToAssignque, RdyReduque is a queue ready to be powered down in the queue to be operated ToAssignque;

g. processing the Sum _ oprnow is more than or equal to the Sum _ assign under the second condition, and in the second condition, selecting a ToAssignque unit to perform shutdown operation;

according to the state judgment of each unit in the ToAssignque queue, dividing the unit into a pre-shutdown queue Haltgroup and a pre-reduced power queue, wherein the judgment method comprises the following steps:

unit adds in reduced power Redugroup queue

else if(P_imea＜P_min)

Unit joining Haltgroup queue for pre-shutdown

else

if(J_ist＞J_ire)

Unit joining Haltgroup queue for pre-shutdown

else

Unit adds in reduced power Redugroup queue

Wherein,

representing the starting time of the unit, i belongs to ToAssignque;

the minimum starting time of the unit is set as a control strategy value; p_imeaThe actual power value of the unit is obtained through communication; p_iminIs the minimum operating power of the unit; j. the design is a square_istIs a unit shutdown operation judgment coefficient; j. the design is a square_ireThe unit power reduction operation judgment coefficient; haltgroup is a pre-shutdown queue; redugroup is a pre-reduction power queue;

unit stop operation judgment coefficient J_istThe calculation method is as follows;

J_ist＝w_tst*C_isc

w _ tst is the shutdown operation weight; c_iscIs the unit shutdown factor; j. the design is a square_istIs a unit shutdown operation judgment coefficient;

judging coefficient J of unit power reduction operation_ireThe calculation method is as follows:

J_ire＝w_tre*C_isub

w _ tre is a power down operation weight; c_isubIs the unit derating coefficient; j. the design is a square_istThe unit power reduction operation judgment coefficient;

Sum_all＝Sum_oprpow

sequentially selecting the units in the Haltgroup to be stopped from running to increase the power, and accumulating the power until Sum _ all > | delta P_fsetThe selected unit forms a ready-to-stop queue RdyHaltque2, and the rest units form a power queue RdyReduque to be reduced;

RdyHaltque2 Haltgroup (partial or complete unit)

RdyReduque＝ToAssignque-RdyHaltque2

h. Calculating the required reduced power for rdyreeque queues:

calculate the power at which the shutdown operations of the ready to shutdown queue 1RdyHaltque1 and the ready to shutdown queue 2RdyHaltque2 crew can be reduced:

P_halt＝∑P_imea,i∈RdyHaltque1∪i∈RdyHaltque2

P_haltis that the shutdown queues RdyHaltque1 and RdyHaltque2 can be reduced after shutdownA total power value;

P_st＝|ΔP_fset|-P_halt

P_stif the power is the remaining power which needs to be reduced, the power reduction operation is carried out by the machine set in the RdyReduque queue:

for the unit machine power reduction value in the RdyReduque queue unit, the power value is as follows:

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