CN117477683A - Wind generating set power control method, device, system and storage medium - Google Patents

Wind generating set power control method, device, system and storage medium Download PDF

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Publication number
CN117477683A
CN117477683A CN202311515666.6A CN202311515666A CN117477683A CN 117477683 A CN117477683 A CN 117477683A CN 202311515666 A CN202311515666 A CN 202311515666A CN 117477683 A CN117477683 A CN 117477683A
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China
Prior art keywords
power
wind
wind generating
generating set
processed
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CN202311515666.6A
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Chinese (zh)
Inventor
史宣亮
李鹏
黑乔
阚力勤
何国华
欧习国
王杰
江均
钟欣
李瑶
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Chongqing Haizhuang Windpower Engineering Technology Co ltd
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Chongqing Haizhuang Windpower Engineering Technology Co ltd
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Priority to CN202311515666.6A priority Critical patent/CN117477683A/en
Publication of CN117477683A publication Critical patent/CN117477683A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/48—Controlling the sharing of the in-phase component
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H02J3/241—The oscillation concerning frequency
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The invention provides a method, a device, a system and a storage medium for controlling power of a wind generating set, belonging to the technical field of wind power generation, wherein the method comprises the following steps: leading in rated capacity of a wind farm, rated frequency of a power system and grid-connected point frequency, and obtaining initial wind generating set power and set running state from a wind generating set; screening the wind generating set to be processed from the wind generating sets according to the running state of the sets; and carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of the initial wind generating set, and controlling the wind generating set to be processed to carry out power adjustment according to analysis results. The invention improves the whole active power response speed of the wind power generation station, increases the full-field inertia response function, can match the power grid characteristics of different wind power generation stations, and meets the full-field inertia response time and precision.

Description

Wind generating set power control method, device, system and storage medium
Technical Field
The invention mainly relates to the technical field of wind power generation, in particular to a method, a device and a system for controlling power of a wind generating set and a storage medium.
Background
In recent years, the wind power industry develops rapidly, the duty ratio in a power grid is gradually increased, and the power grid has continuously improved requirements on the power grid regulation capability of a wind power generation station. The new energy should provide effective active support under the abnormal condition of power grid fault; including full field inertia response work support capability. The wind power generation station is connected to the power grid and is directly connected with the power booster station, so that the power fluctuation of the wind power station further affects the load change of the power grid system, the power grid frequency fluctuation is caused, otherwise, the power grid frequency fluctuation also affects the power generation of station equipment, and the wind power generation equipment needs to respond when the power grid frequency changes. In order to make the power system stably run, it is proposed that the wind power plant should have a full-farm inertia response function. The wind generating set and the energy management platform which are installed at early stage do not have the full-field inertia response function, so that the phenomena of untimely regulation and control of power and insufficient regulation precision exist in the inertia response period.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method, a device, a system and a storage medium for controlling the power of a wind generating set aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows: a power control method of a wind generating set comprises the following steps:
leading in rated capacity of a wind farm, rated frequency of a power system and grid-connected point frequency, and obtaining initial wind generating set power corresponding to each wind generating set and set running states corresponding to each wind generating set from a plurality of wind generating sets;
screening a plurality of wind generating sets to be processed from all the wind generating sets according to the running states of all the sets;
and carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all the initial wind generating sets, and controlling all the wind generating sets to be processed to carry out power adjustment according to analysis results.
The other technical scheme for solving the technical problems is as follows: a wind turbine generator system power control device comprising:
the import module is used for importing rated capacity of the wind power plant, rated frequency of the power system and frequency of the grid connection point;
the power obtaining module is used for obtaining initial wind generating set power corresponding to each wind generating set and set running states corresponding to each wind generating set from a plurality of wind generating sets;
the screening module is used for screening a plurality of wind generating sets to be processed from all the wind generating sets according to the running states of all the sets;
the power adjustment module is used for carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all the initial wind generating sets, and controlling all the wind generating sets to be processed to carry out power adjustment according to analysis results.
Based on the method for controlling the power of the wind generating set, the invention further provides a system for controlling the power of the wind generating set.
The other technical scheme for solving the technical problems is as follows: a wind turbine power control system comprising a memory, a processor and a computer program stored in the memory and executable on the processor, which when executed by the processor implements a wind turbine power control method as described above.
Based on the method for controlling the power of the wind generating set, the invention further provides a computer readable storage medium.
The other technical scheme for solving the technical problems is as follows: a computer readable storage medium storing a computer program which, when executed by a processor, implements a wind park power control method as described above.
The beneficial effects of the invention are as follows: the method comprises the steps of obtaining initial wind generating set power and set operation states from a plurality of wind generating sets, screening the wind generating sets to be processed from the wind generating sets according to the set operation states, carrying out power adjustment analysis on rated capacity of a wind power plant, rated frequency of a power system, grid-connected point frequency and initial wind generating set power, and controlling the wind generating sets to be processed to carry out power adjustment according to analysis results, so that the overall active power response rate of a wind power station is improved, the full-farm inertia response function is increased, the power grid characteristics of different wind generating stations can be matched, and the full-farm inertia response time and precision are met.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling power of a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is a flowchart of another method for controlling power of a wind turbine generator system according to an embodiment of the present invention;
fig. 3 is a block diagram of a power control device of a wind generating set according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Fig. 1 is a schematic flow chart of a method for controlling power of a wind turbine generator set according to an embodiment of the present invention.
As shown in fig. 1, a method for controlling power of a wind generating set includes the following steps:
leading in rated capacity of a wind farm, rated frequency of a power system and grid-connected point frequency, and obtaining initial wind generating set power corresponding to each wind generating set and set running states corresponding to each wind generating set from a plurality of wind generating sets;
screening a plurality of wind generating sets to be processed from all the wind generating sets according to the running states of all the sets;
and carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all the initial wind generating sets, and controlling all the wind generating sets to be processed to carry out power adjustment according to analysis results.
In the embodiment, the initial wind generating set power and the set running state are obtained from the plurality of wind generating sets, the wind generating sets to be processed are screened from the wind generating sets according to the set running state, the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power adjustment analysis of the initial wind generating set power are performed, the wind generating sets to be processed are controlled to perform power adjustment according to the analysis result, the whole active power response rate of the wind generating set is improved, the full-field inertia response function is increased, the power grid characteristics of different wind generating sets can be matched, and the full-field inertia response time and precision are met.
Optionally, as an embodiment of the present invention, the process of screening a plurality of wind generating sets to be processed from all the wind generating sets according to all the set operation states includes:
when the unit operation state is the operation state, the wind generating set corresponding to the unit operation state is used as the wind generating set to be processed, so that a plurality of wind generating sets to be processed are obtained.
It should be understood that when the unit operation state is an operation state or a maintenance state, the wind generating unit corresponding to the unit operation state is deleted.
It will be appreciated that the unit operating conditions are determined from the wind turbine upload data.
Specifically, the unit operation state is judged according to the collected unit state and data (namely the unit operation state), and the number of the wind generating units which can participate in control is determined according to the wind generating unit operation state.
In the embodiment, the plurality of wind generating sets to be processed are screened out from all the wind generating sets according to the running states of all the sets, so that the number of data processing is reduced, the wind generating sets to be processed are accurately positioned, the overall active power response rate of the wind power station is improved, the full-farm inertia response function is increased, the power grid characteristics of different wind power stations can be matched, and the full-farm inertia response time and precision are met.
Optionally, as an embodiment of the present invention, the process of performing power adjustment analysis on the rated capacity of the wind farm, the rated frequency of the power system, the grid-connected point frequency and all the initial wind generating set powers, and controlling all the wind generating sets to be processed to perform power adjustment according to the analysis result includes:
calculating the power variation quantity of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency to obtain the active power variation quantity of the wind power plant;
counting the number of all the wind generating sets to be processed to obtain the total number of the wind generating sets to be processed;
calculating the active power variation of the wind power plant and the total number of the wind power generator sets to be processed by a first formula to obtain an average value of the active power of the wind power plant, wherein the first formula is as follows:
wherein,the method comprises the steps that the active power average value of a wind power plant is delta P1, the active power variation of the wind power plant is delta P1, and N is the total number of wind generating sets to be processed;
judging whether the active power variation of the wind power plant is a preset power variation threshold value, if so, respectively controlling the lifting power of the wind power generator set to be processed corresponding to the power of each wind power generator set to be processed according to the average value of the active power of each wind power plant; if not, respectively controlling the power reduction of the wind generating set to be processed corresponding to the power of each wind generating set to be processed according to the active power average value of each wind farm;
adding the active power average value of the wind farm and the power of each initial wind generating set to obtain power of each wind generating set to be processed, wherein the power corresponds to each wind generating set to be processed;
when the power of the wind generating set to be processed is larger than the preset maximum power, calculating the difference between the power of the wind generating set to be processed and the preset maximum power to obtain a power difference value of the wind generating set to be processed;
when the power of the wind generating set to be processed is smaller than the preset minimum power, taking the wind generating set to be processed corresponding to the power of the wind generating set to be processed as a target wind generating set;
calculating the sum of the power difference values of all the wind generating sets to be processed to obtain the target wind generating set power;
counting the number of all the target wind generating sets to obtain the total number of the target wind generating sets;
calculating the target wind generating set power and the total number of the target wind generating sets through a second formula to obtain a target wind generating set power average value, wherein the second formula is as follows:
wherein,the power average value of the target wind generating set is delta P2, the power of the target wind generating set is delta P2, and M is the total number of the target wind generating sets;
and respectively controlling the lifting power of each target wind generating set according to the average power value of the target wind generating set.
Preferably, the preset power change threshold may be 0.
It should be appreciated that the unit active assignments are determined based on the unit operating conditions.
It should be appreciated that the active target value (i.e. the wind farm active power variation) is issued in a ladder manner according to the active adjustment and the state of the machine set.
Specifically, the first active power distribution is performed by adopting an average value method according to the real-time state of the unit, after the completion of the first active power distribution, the second active power distribution adjustment amount (namely the power of the wind turbine generator to be processed) is collected according to the state of the unit, if the second active power distribution adjustment amount is not zero, the second active power distribution is performed, and after the distribution is completed, the issued active power (namely the average value of the power of the target wind turbine generator) is verified.
Specifically, the active target value (i.e. the average value of the active power of the wind farm) of the wind generating set is distributed according to the active adjustment quantity (i.e. the active power change quantity of the wind farm) and the quantity of the wind generating sets which can participate in the wind generating set. The first active target value distribution is completed through an average active distribution method; and meanwhile, collecting the active secondary distribution amount according to the state of the unit after active primary distribution.
It should be appreciated that the active target value (i.e., the target wind turbine power average) of a single turbine is determined by performing secondary active distribution based on the active secondary distribution amount (i.e., the target wind turbine power) and the real-time state of the turbine.
In the embodiment, the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all initial wind generating sets are subjected to power adjustment analysis, and all the wind generating sets to be processed are controlled to be subjected to power adjustment according to the analysis result, so that the overall active power response rate of the wind power plant is improved, the full-plant inertia response function is increased, the power grid characteristics of different wind power plant can be matched, and the full-plant inertia response time and precision are met.
Optionally, as an embodiment of the present invention, the calculating the power variation of the rated capacity of the wind farm, the rated frequency of the power system, and the grid-connected point frequency to obtain the active power variation of the wind farm includes:
calculating the power variation of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency through a third formula to obtain the active power variation of the wind power plant, wherein the third formula is as follows:
wherein DeltaP 1 is the change quantity of active power of the wind power plant, T J For presetting the inertia time constant speed of the wind power plant, f N The rated frequency of the power system is f is the frequency of a grid-connected point, P N Is the rated capacity of the wind farm.
It should be understood that in the present context,
in the formula, delta P is the change quantity of active power of the wind power plant, and the unit is: w is a metal; t (T) J -wind farm inertia time constant, unit: s, the typical value is 4 s-12 s; f (f) N -power system nominal frequency, unit: hz; f-grid-connected point frequency, unit: hz; p (P) N -wind farm rated capacity, unit: w.
In the embodiment, the power variation of the rated capacity of the wind power plant, the rated frequency of the power system and the frequency of the grid-connected point is calculated through the third formula to obtain the active power variation of the wind power plant, so that the overall active power response rate of the wind power plant is improved, and the full-field inertia response function is increased.
Alternatively, as another embodiment of the present invention, the power generation system is a power generation and use system composed of links of a power plant, a power transmission and transformation line, a power supply and distribution station, and electricity consumption. The traditional power system mainly adopts thermal power and water power to adjust the electric quantity of the power grid, and mainly comprises voltage, frequency and power adjustment. Under normal conditions, the total active power emitted by the power grid and the total active power consumed by the power grid are balanced, the frequency of the power grid system can be kept at about the power frequency, and when the emitted power is greater than the consumed power, the frequency of the system is increased; when the power emitted is lower than the power consumed, the system frequency decreases. Aiming at the early wind power plant not having full-field inertia response function, the invention develops a set of full-field inertia response controller and algorithm relative to the original energy management platform, and the full-field inertia response regulation and the original AGCAVC regulation are mutually independent and are subjected to algorithm logic control.
Optionally, as another embodiment of the present invention, when the grid frequency fluctuates, the frequency modulation device detects the frequency fluctuation and calculates the corresponding active adjustment amount according to the formula (1), and sends the active adjustment amount to the inertia response controller, and the inertia controller feeds back the inertia response starting signal to the energy management platform according to the enabling signal and the priority parameter, locks the energy management platform control, reduces the load of the unit PLC, and improves the unit response rate. And the inertia controller judges and counts the adjustable wind generating set according to the collected wind generating set data, designs an inertia response field group control algorithm aiming at the active adjustment quantity issued by the frequency modulation device and the real-time state of the wind generating set, and adjusts the full field power of the wind power plant. The invention improves the whole active power response speed of the wind power generation station so as to meet the aims of full-field inertia response time and precision.
In the formula, delta P is the change quantity of active power of the wind power plant, and the unit is: w is a metal;T J -wind farm inertia time constant, unit: s, the typical value is 4 s-12 s; f (f) N -power system nominal frequency, unit: hz; f-grid-tie-point frequency (lead-in amount), unit: hz; p (P) N -wind farm rated capacity, unit: w.
And after the inertia response is finished, the inertia response controller finishes locking of the energy management platform, and the energy management platform performs intervention control.
Alternatively, as another embodiment of the present invention, the inertia responsive controller of the present invention coordinates with the energy management platform as shown in FIG. 2. The frequency change rate of the power grid is proportional to the active power change amount. When the frequency change rate is larger than the action dead zone, starting full-field inertia response, and dividing a full-field inertia response control algorithm into three stages. And after receiving the starting signal, the inertia controller judges the running state of the unit according to the uploading data of the wind generating unit, and determines the active distribution of the unit according to the running state of the unit.
Step two, performing echelon issuing on an active target value according to the active adjustment quantity and the state of the unit, in step one, performing first active distribution according to the real-time state of the unit by adopting an average value method, collecting the active adjustment quantity subjected to secondary distribution according to the state of the unit after the first active distribution is completed, performing secondary distribution if the active adjustment quantity subjected to secondary distribution is not zero, and checking the issued active power after the distribution is completed.
And thirdly, the target value is sent to the wind generating set, the wind generating set uploads real-time response data back to the controller, and the controller adjusts according to the response condition of the wind generating set, so that the full-field inertia requirement of the power grid is met.
Optionally, as another embodiment of the invention, the full-field inertia response function is added according to the existing energy management active control strategy of the wind generating set, and the control parameters of the inertia controller are adjusted to match the power grid characteristics of different wind generating stations so as to meet the technical requirements of the full-field inertia response of the power grid.
Alternatively, as another embodiment of the present invention, the specific steps of the present invention are as follows:
1. the frequency modulation equipment detects power grid frequency fluctuation, the inertia controller receives inertia response trigger signals in the operation process, and the energy management platform is locked for control according to parameter setting. The full-field inertia response control state is entered, and the signal can be triggered automatically or manually.
2. After entering a full-field inertia response state, the inertia controller records the current active power and the active variation. And meanwhile, judging the running state of the unit according to the collected unit state and data, and determining the number of the wind generating units which can participate in control according to the running state of the wind generating units.
3. And distributing the active target value of the wind generating set according to the active adjustment quantity and the quantity of the participatable wind generating sets. The first active target value distribution is completed through an average active distribution method; and meanwhile, collecting the active secondary distribution amount according to the state of the unit after active primary distribution.
4. And performing secondary active distribution according to the active secondary distribution amount and the real-time state of the unit, determining an active target value of the single unit, issuing an active target value instruction to the wind turbine generator through a high-speed text protocol, and performing active adjustment according to the target value by the wind turbine generator.
5. And adjusting the control parameters of the inertia controller and the parameters of the wind generating set according to the full-field response effect so as to ensure that the response accuracy and the response time meet the index requirements.
Fig. 3 is a block diagram of a power control device of a wind generating set according to an embodiment of the present invention.
Alternatively, as another embodiment of the present invention, as shown in fig. 3, a wind turbine generator system power control apparatus includes:
the import module is used for importing rated capacity of the wind power plant, rated frequency of the power system and frequency of the grid connection point;
the power obtaining module is used for obtaining initial wind generating set power corresponding to each wind generating set and set running states corresponding to each wind generating set from a plurality of wind generating sets;
the screening module is used for screening a plurality of wind generating sets to be processed from all the wind generating sets according to the running states of all the sets;
the power adjustment module is used for carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all the initial wind generating sets, and controlling all the wind generating sets to be processed to carry out power adjustment according to analysis results.
Optionally, as an embodiment of the present invention, the screening module is specifically configured to:
when the unit operation state is the operation state, the wind generating set corresponding to the unit operation state is used as the wind generating set to be processed, so that a plurality of wind generating sets to be processed are obtained.
Optionally, as an embodiment of the present invention, the power adjustment module is specifically configured to:
calculating the power variation quantity of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency to obtain the active power variation quantity of the wind power plant;
counting the number of all the wind generating sets to be processed to obtain the total number of the wind generating sets to be processed;
calculating the active power variation of the wind power plant and the total number of the wind power generator sets to be processed by a first formula to obtain an average value of the active power of the wind power plant, wherein the first formula is as follows:
wherein,the method comprises the steps that the active power average value of a wind power plant is delta P1, the active power variation of the wind power plant is delta P1, and N is the total number of wind generating sets to be processed;
judging whether the active power variation of the wind power plant is a preset power variation threshold value, if so, respectively controlling the lifting power of the wind power generator set to be processed corresponding to the power of each wind power generator set to be processed according to the average value of the active power of each wind power plant; if not, respectively controlling the power reduction of the wind generating set to be processed corresponding to the power of each wind generating set to be processed according to the active power average value of each wind farm;
adding the active power average value of the wind farm and the power of each initial wind generating set to obtain power of each wind generating set to be processed, wherein the power corresponds to each wind generating set to be processed;
when the power of the wind generating set to be processed is larger than the preset maximum power, calculating the difference between the power of the wind generating set to be processed and the preset maximum power to obtain a power difference value of the wind generating set to be processed;
when the power of the wind generating set to be processed is smaller than the preset minimum power, taking the wind generating set to be processed corresponding to the power of the wind generating set to be processed as a target wind generating set;
calculating the sum of the power difference values of all the wind generating sets to be processed to obtain the target wind generating set power;
counting the number of all the target wind generating sets to obtain the total number of the target wind generating sets;
calculating the target wind generating set power and the total number of the target wind generating sets through a second formula to obtain a target wind generating set power average value, wherein the second formula is as follows:
wherein,the power average value of the target wind generating set is delta P2, the power of the target wind generating set is delta P2, and M is the total number of the target wind generating sets;
and respectively controlling the lifting power of each target wind generating set according to the average power value of the target wind generating set.
Optionally, as an embodiment of the present invention, in the power adjustment module, the calculating the power variation of the rated capacity of the wind farm, the rated frequency of the power system, and the grid-connected point frequency, to obtain the active power variation of the wind farm includes:
calculating the power variation of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency through a third formula to obtain the active power variation of the wind power plant, wherein the third formula is as follows:
wherein DeltaP 1 is the change quantity of active power of the wind power plant, T J For presetting the inertia time constant speed of the wind power plant, f N The rated frequency of the power system is f is the frequency of a grid-connected point, P N Is the rated capacity of the wind farm.
Alternatively, another embodiment of the present invention provides a wind turbine power control system comprising a memory, a processor and a computer program stored in the memory and executable on the processor, which when executed by the processor, implements a wind turbine power control method as described above. The system may be a computer or the like.
Alternatively, another embodiment of the invention provides a computer readable storage medium storing a computer program which, when executed by a processor, implements a wind turbine generator set power control method as described above.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the apparatus and units described above may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The power control method of the wind generating set is characterized by comprising the following steps of:
leading in rated capacity of a wind farm, rated frequency of a power system and grid-connected point frequency, and obtaining initial wind generating set power corresponding to each wind generating set and set running states corresponding to each wind generating set from a plurality of wind generating sets;
screening a plurality of wind generating sets to be processed from all the wind generating sets according to the running states of all the sets;
and carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all the initial wind generating sets, and controlling all the wind generating sets to be processed to carry out power adjustment according to analysis results.
2. The method for controlling the power of the wind generating set according to claim 1, wherein the process of screening a plurality of wind generating sets to be processed from all the wind generating sets according to all the set operation states comprises:
when the unit operation state is the operation state, the wind generating set corresponding to the unit operation state is used as the wind generating set to be processed, so that a plurality of wind generating sets to be processed are obtained.
3. The method for controlling power of a wind turbine generator set according to claim 1, wherein the process of performing power adjustment analysis on the rated capacity of the wind farm, the rated frequency of the power system, the grid-connected point frequency and all the initial wind turbine generator set powers, and controlling all the wind turbine generator sets to be processed to perform power adjustment according to the analysis result comprises:
calculating the power variation quantity of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency to obtain the active power variation quantity of the wind power plant;
counting the number of all the wind generating sets to be processed to obtain the total number of the wind generating sets to be processed;
calculating the active power variation of the wind power plant and the total number of the wind power generator sets to be processed by a first formula to obtain an average value of the active power of the wind power plant, wherein the first formula is as follows:
wherein,the method comprises the steps that the active power average value of a wind power plant is delta P1, the active power variation of the wind power plant is delta P1, and N is the total number of wind generating sets to be processed;
judging whether the active power variation of the wind power plant is a preset power variation threshold value, if so, respectively controlling the lifting power of the wind power generator set to be processed corresponding to the power of each wind power generator set to be processed according to the average value of the active power of each wind power plant; if not, respectively controlling the power reduction of the wind generating set to be processed corresponding to the power of each wind generating set to be processed according to the active power average value of each wind farm;
adding the active power average value of the wind farm and the power of each initial wind generating set to obtain power of each wind generating set to be processed, wherein the power corresponds to each wind generating set to be processed;
when the power of the wind generating set to be processed is larger than the preset maximum power, calculating the difference between the power of the wind generating set to be processed and the preset maximum power to obtain a power difference value of the wind generating set to be processed;
when the power of the wind generating set to be processed is smaller than the preset minimum power, taking the wind generating set to be processed corresponding to the power of the wind generating set to be processed as a target wind generating set;
calculating the sum of the power difference values of all the wind generating sets to be processed to obtain the target wind generating set power;
counting the number of all the target wind generating sets to obtain the total number of the target wind generating sets;
calculating the target wind generating set power and the total number of the target wind generating sets through a second formula to obtain a target wind generating set power average value, wherein the second formula is as follows:
wherein,the power average value of the target wind generating set is delta P2, the power of the target wind generating set is delta P2, and M is the total number of the target wind generating sets;
and respectively controlling the lifting power of each target wind generating set according to the average power value of the target wind generating set.
4. The method for controlling power of a wind turbine generator set according to claim 3, wherein the calculating the power variation of the rated capacity of the wind farm, the rated frequency of the power system and the frequency of the grid-connected point to obtain the active power variation of the wind farm comprises:
calculating the power variation of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency through a third formula to obtain the active power variation of the wind power plant, wherein the third formula is as follows:
wherein DeltaP 1 is the change quantity of active power of the wind power plant, T J For presetting the inertia time constant speed of the wind power plant, f N The rated frequency of the power system is f is the frequency of a grid-connected point, P N Is the rated capacity of the wind farm.
5. A wind turbine generator system power control apparatus, comprising:
the import module is used for importing rated capacity of the wind power plant, rated frequency of the power system and frequency of the grid connection point;
the power obtaining module is used for obtaining initial wind generating set power corresponding to each wind generating set and set running states corresponding to each wind generating set from a plurality of wind generating sets;
the screening module is used for screening a plurality of wind generating sets to be processed from all the wind generating sets according to the running states of all the sets;
the power adjustment module is used for carrying out power adjustment analysis on the rated capacity of the wind power plant, the rated frequency of the power system, the grid-connected point frequency and the power of all the initial wind generating sets, and controlling all the wind generating sets to be processed to carry out power adjustment according to analysis results.
6. The wind generating set power control device of claim 5, wherein the screening module is specifically configured to:
when the unit operation state is the operation state, the wind generating set corresponding to the unit operation state is used as the wind generating set to be processed, so that a plurality of wind generating sets to be processed are obtained.
7. The wind generating set power control apparatus of claim 5, wherein the power adjustment module is specifically configured to:
calculating the power variation quantity of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency to obtain the active power variation quantity of the wind power plant;
counting the number of all the wind generating sets to be processed to obtain the total number of the wind generating sets to be processed;
calculating the active power variation of the wind power plant and the total number of the wind power generator sets to be processed by a first formula to obtain an average value of the active power of the wind power plant, wherein the first formula is as follows:
wherein,the method comprises the steps that the active power average value of a wind power plant is delta P1, the active power variation of the wind power plant is delta P1, and N is the total number of wind generating sets to be processed;
judging whether the active power variation of the wind power plant is a preset power variation threshold value, if so, respectively controlling the lifting power of the wind power generator set to be processed corresponding to the power of each wind power generator set to be processed according to the average value of the active power of each wind power plant; if not, respectively controlling the power reduction of the wind generating set to be processed corresponding to the power of each wind generating set to be processed according to the active power average value of each wind farm;
adding the active power average value of the wind farm and the power of each initial wind generating set to obtain power of each wind generating set to be processed, wherein the power corresponds to each wind generating set to be processed;
when the power of the wind generating set to be processed is larger than the preset maximum power, calculating the difference between the power of the wind generating set to be processed and the preset maximum power to obtain a power difference value of the wind generating set to be processed;
when the power of the wind generating set to be processed is smaller than the preset minimum power, taking the wind generating set to be processed corresponding to the power of the wind generating set to be processed as a target wind generating set;
calculating the sum of the power difference values of all the wind generating sets to be processed to obtain the target wind generating set power;
counting the number of all the target wind generating sets to obtain the total number of the target wind generating sets;
calculating the target wind generating set power and the total number of the target wind generating sets through a second formula to obtain a target wind generating set power average value, wherein the second formula is as follows:
wherein,the power average value of the target wind generating set is delta P2, the power of the target wind generating set is delta P2, and M is the total number of the target wind generating sets;
and respectively controlling the lifting power of each target wind generating set according to the average power value of the target wind generating set.
8. The wind generating set power control device according to claim 7, wherein the process of calculating the power variation of the rated capacity of the wind farm, the rated frequency of the power system and the grid-connected point frequency in the power adjustment module to obtain the active power variation of the wind farm includes:
calculating the power variation of the rated capacity of the wind power plant, the rated frequency of the power system and the grid-connected point frequency through a third formula to obtain the active power variation of the wind power plant, wherein the third formula is as follows:
wherein DeltaP 1 is the change quantity of active power of the wind power plant, T J For presetting the inertia time constant speed of the wind power plant, f N The rated frequency of the power system is f is the frequency of a grid-connected point, P N Is the rated capacity of the wind farm.
9. A wind turbine power control system comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements a wind turbine power control method as claimed in any one of claims 1 to 4.
10. A computer readable storage medium storing a computer program, characterized in that the method of controlling the power of a wind park according to any one of claims 1 to 4 is implemented when the computer program is executed by a processor.
CN202311515666.6A 2023-11-13 2023-11-13 Wind generating set power control method, device, system and storage medium Pending CN117477683A (en)

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CN202311515666.6A CN117477683A (en) 2023-11-13 2023-11-13 Wind generating set power control method, device, system and storage medium

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Application Number Priority Date Filing Date Title
CN202311515666.6A CN117477683A (en) 2023-11-13 2023-11-13 Wind generating set power control method, device, system and storage medium

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CN117477683A true CN117477683A (en) 2024-01-30

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