WO2023123686A1 - 风电场内无功功率的调节方法、装置及电子设备 - Google Patents

风电场内无功功率的调节方法、装置及电子设备 Download PDF

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Publication number
WO2023123686A1
WO2023123686A1 PCT/CN2022/080727 CN2022080727W WO2023123686A1 WO 2023123686 A1 WO2023123686 A1 WO 2023123686A1 CN 2022080727 W CN2022080727 W CN 2022080727W WO 2023123686 A1 WO2023123686 A1 WO 2023123686A1
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Prior art keywords
reactive power
wind farm
power control
voltage
reactive
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PCT/CN2022/080727
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English (en)
French (fr)
Inventor
武磊
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北京金风科创风电设备有限公司
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Application filed by 北京金风科创风电设备有限公司 filed Critical 北京金风科创风电设备有限公司
Priority to KR1020247004150A priority Critical patent/KR20240031368A/ko
Priority to EP22912992.9A priority patent/EP4366112A1/en
Priority to AU2022424605A priority patent/AU2022424605A1/en
Publication of WO2023123686A1 publication Critical patent/WO2023123686A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/028—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
    • F03D7/0284—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power in relation to the state of the electric grid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • F03D7/048—Automatic control; Regulation by means of an electrical or electronic controller controlling wind farms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • 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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • 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
    • 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
    • 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
    • H02J3/50—Controlling the sharing of the out-of-phase component
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/103—Purpose of the control system to affect the output of the engine
    • F05B2270/1033—Power (if explicitly mentioned)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/335—Output power or torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/337—Electrical grid status parameters, e.g. voltage, frequency or power demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources

Definitions

  • the present application relates to the technical field of power regulation, in particular to a method, device and electronic equipment for regulating reactive power in a wind farm.
  • the voltage of each machine position is different.
  • the wind farm adjusts the reactive power, in order to avoid the wind turbine voltage protection triggered by the highest or lowest voltage position, it is necessary to limit the adjustment of the reactive power of the wind farm with the highest and lowest voltage units, resulting in the reactive power of the cluster cluster in the wind farm. Power is limited.
  • the embodiments of the present application provide a reactive power adjustment method, device and electronic equipment in a wind farm, which can solve the technical problem in the related art that the reactive power of the clusters in the wind farm is limited due to different voltages at different positions.
  • the embodiment of the first aspect of the present application provides a method for adjusting reactive power in a wind farm, the method comprising:
  • the reactive power control parameters of the wind farm calculate the average reactive power control parameters of a single unit in the wind farm
  • the average reactive power control parameters of the corresponding unit are corrected to obtain the reactive power control parameters of the corresponding unit for a single unit;
  • the embodiment of the second aspect of the present application provides a device for regulating reactive power in a wind farm, the device comprising:
  • the obtaining unit is used to obtain the reactive power control parameters of the wind farm sent by the grid to the wind farm;
  • the calculation unit is used to calculate the average reactive power control parameters of a single unit in the wind farm according to the reactive power control parameters of the wind farm;
  • the correction unit is used to correct the average reactive power control parameter of the corresponding unit according to the difference between the grid-connected point voltage of each unit and the preset voltage limit, so as to obtain the reactive power control parameter of a single unit of the corresponding unit;
  • the output unit is used to output the reactive power control parameters of the corresponding unit to each unit.
  • the embodiment of the third aspect of the present application provides an electronic device, the electronic device includes: a processor and a memory storing program instructions; when the processor executes the program instructions, the wind farm as provided in the embodiment of the first aspect of the present application is realized The adjustment method of internal reactive power.
  • the embodiment of the fourth aspect of the present application provides a readable storage medium, on which program instructions are stored, and when the program instructions are executed by the processor, the wind farm wind power plant as provided in the embodiment of the first aspect of the present application is implemented. Adjustment method of reactive power.
  • the embodiment of the fifth aspect of the present application provides a program product.
  • the instructions in the program product are executed by the processor of the electronic device, the electronic device can execute the wind farm remote How to adjust power.
  • the reactive power adjustment method, device, electronic equipment, readable storage medium, and program product in the embodiment of the present application obtain the reactive power control parameters of the wind farm sent by the power grid to the wind farm; according to the reactive power control parameters of the wind farm , to calculate the average reactive power control parameters of a single unit in the wind farm; according to the difference between the grid-connected point voltage of each unit and the preset voltage limit, the average reactive power control parameters of the corresponding unit are corrected to obtain the corresponding unit’s Reactive power control parameters of a single unit; output the reactive power control parameters of a corresponding unit to each unit.
  • it can solve the technical problem in the related art that the reactive power of the unit cluster in the wind farm is limited due to the different voltages of different machines.
  • Fig. 1 is a schematic flow chart of a method for adjusting reactive power in a wind farm provided by an embodiment of the present application
  • Fig. 2a and Fig. 2b are schematic diagrams of the principle of a method for adjusting reactive power in a wind farm provided by an embodiment of the present application;
  • FIG. 3a and FIG. 3b are schematic diagrams of the principle of a method for adjusting reactive power in a wind farm provided by another embodiment of the present application;
  • Fig. 4a and Fig. 4b are schematic diagrams of the principle of a method for adjusting reactive power in a wind farm provided by another embodiment of the present application;
  • Fig. 5a and Fig. 5b are schematic diagrams of the principle of a method for adjusting reactive power in a wind farm provided by another embodiment of the present application;
  • Fig. 6 is a schematic structural diagram of a reactive power regulating device in a wind farm provided by another embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of an electronic device provided by another embodiment of the present application.
  • embodiments of the present application provide a method, device, device and readable storage medium for adjusting reactive power in a wind farm.
  • the method for adjusting reactive power in a wind farm provided by the embodiment of the present application is firstly introduced below.
  • Fig. 1 shows a schematic flowchart of a method for adjusting reactive power in a wind farm provided by an embodiment of the present application. As shown in Figure 1, the method includes the following steps 101 to 104:
  • Step 101 acquire wind farm reactive power control parameters sent by the grid to the wind farm.
  • the reactive power control parameters of the wind farm sent by the grid to the wind farm may be sent through reactive power commands.
  • the wind farm reactive control parameter may be a reactive power value or a reactive voltage value.
  • Step 102 according to the reactive control parameters of the wind farm, calculate the average reactive power control parameters of a single unit in the wind farm.
  • the average reactive power control parameters of a single unit in a wind farm can be used as a benchmark for the adaptive adjustment of each unit.
  • an optional implementation is to calculate the reactive power loss parameters of the reactive power control parameters of the wind farm according to the on-site loss coefficient , and then through the first proportional-integral controller, the reactive parameter difference is adjusted to obtain the reactive parameter error, and finally the average reactive parameter is calculated according to the sum of the reactive power loss parameter and the reactive parameter error, and the number of units in the wind farm power control parameters.
  • the reactive parameter difference is the difference between the reactive power control parameters of the wind farm and the measured reactive parameters collected by the grid-connected point of the wind farm.
  • the measured reactive parameter is also the reactive power value; in the case that the reactive power control parameter of the wind farm is reactive voltage value, the measured reactive parameter is also reactive Power voltage value.
  • step 102 may be performed by the station, and a limiting link may be added to the average reactive power control parameter output by the station to limit the upper and lower limits of the average reactive power control parameter output by the station loop.
  • Step 103 according to the difference between the grid connection point voltage of each unit and the preset voltage limit, correct the average reactive power control parameter of the corresponding unit, and obtain the single unit reactive power control parameter of the corresponding unit.
  • Step 103 is used to adaptively adjust the reactive power control parameters of each single fan unit.
  • the first voltage value can be calculated according to the difference between the preset voltage upper limit value and the grid-connected point voltage
  • the second voltage value can be calculated according to the difference between the preset voltage lower limit value and the grid-connected point voltage.
  • Two voltage values furthermore, the first voltage value is limited to not less than 0, and the second voltage value is limited to not greater than 0, with the constraints of the first voltage value and the second voltage value, according to the first voltage value and the second Voltage value, calculate the reactive power control correction parameters of the corresponding unit. After obtaining the reactive power control correction parameters, the sum of the average reactive power control parameters and the reactive power control correction parameters is calculated to obtain the reactive power control parameters of a single unit corresponding to the unit.
  • Step 104 outputting the reactive power control parameters of a single unit of the corresponding unit to each unit.
  • the reactive power control parameters of the corresponding unit can be output to each unit, so as to control each unit.
  • the fourth proportional-integral controller can be used to compare the reactive power control parameters of the single unit with the reactive power collected at the grid-connected point of the corresponding unit. Adjust the difference between the power parameters to obtain the reactive current target value of the corresponding unit, and control the reactive current of the corresponding unit based on the target reactive current value.
  • the method for adjusting reactive power in a wind farm obtains the reactive power control parameters of the wind farm sent by the power grid to the wind farm; according to the reactive power control parameters of the wind farm, calculates the average reactive power control parameter of a single unit in the wind farm ;According to the difference between the grid-connected point voltage of each unit and the preset voltage limit, the average reactive power control parameters of the corresponding unit are corrected to obtain the reactive power control parameters of the corresponding unit for a single unit; output to each unit The reactive power control parameters of a single unit corresponding to the unit. According to the embodiment of the present application, it can solve the technical problem in the related art that the reactive power of the unit cluster in the wind farm is limited due to the different voltages of different machines.
  • the first optional implementation mode is a first optional implementation mode
  • the difference between the preset voltage upper limit and the grid-connected point voltage can be calculated to obtain the first voltage value;
  • the difference between the limit value and the grid-connected point voltage is calculated to obtain the second voltage value, the difference between the preset voltage lower limit and the grid-connected point voltage can be calculated to obtain the second voltage value.
  • the sum of the first voltage value and the second voltage value can be calculated to obtain the third voltage value, and the third voltage value can be calculated And the product of the droop coefficient, get the reactive power control correction parameter.
  • FIG. 2a A schematic diagram of the control principle of a specific example is shown in Figure 2a and Figure 2b.
  • the wind farm station receives the reactive power control parameter of the wind farm (specifically the reactive power of the wind farm) Q cmd_WF given by the grid, it first passes through the station control
  • the device converts the instruction into a stand-alone instruction, and the specific process is as follows:
  • Wind farm reactive power control parameter Qcmd_WF multiplied by on-site loss coefficient Kp forms a feed-forward component (reactive power loss parameter) as the main component.
  • the reactive power of a single single machine is also adaptively allocated according to the voltage of the grid-connected point.
  • the allocation process of the adaptive strategy includes:
  • the maximum value of the first voltage value i.e. the voltage upper limit UpLimit-E g filter value
  • the minimum value of the second voltage value i.e. the voltage lower limit DownLimit-E g filter value
  • the above-mentioned Limiting can be called limiting processing.
  • the first voltage value and the second voltage value are summed, then multiplied by the droop coefficient K Droop , and further filtered by a filter, the reactive power command of a single fan can be obtained Adaptive correction value (reactive power control correction parameter) Q cmd_WT_Adp .
  • the execution strategy of the stand-alone ring can specifically include:
  • the reactive power Q cmd_WT of a single fan is compared with the reactive power Q smp_WT collected at the grid-connected point of a single fan, and the PI controller performs closed-loop adjustment to obtain the reactive current target value Iq_Ref.
  • the first voltage value is calculated according to the difference between the preset voltage upper limit value and the grid-connected point voltage
  • the first voltage value is calculated according to the difference between the preset voltage lower limit value and the grid-connected point voltage.
  • the grid-connected point voltage may be a filtered voltage value.
  • the difference between the second optional implementation and the first optional implementation is that the correction value (reactive power control correction parameter) Q cmd_WT_Adp in the adaptive strategy is implemented by a PI controller, specifically Implementations include:
  • a third optional implementation is a third optional implementation:
  • the second proportional-integral controller can be used to adjust the difference between the preset voltage upper limit and the grid-connected point voltage to obtain the second A voltage value
  • the difference between the preset voltage lower limit value and the grid-connected point voltage can be calculated by the third proportional-integral controller Adjust to obtain the second voltage value.
  • the reactive power control correction parameter of the corresponding unit according to the first voltage value and the second voltage value the sum of the first voltage value and the second voltage value may be calculated to obtain the reactive power control correction parameter.
  • the difference between the third optional implementation manner and the first optional implementation manner is that the control target of the power station is the voltage of the grid connection point of the wind farm.
  • the difference between the target voltage V cmd_WT of the wind farm station and the grid-connected point voltage V cmd_WT of the wind farm is adjusted through the closed-loop adjustment of the PI controller (the second proportional-integral controller), and the PI controller (the third proportional-integral controller) controller), and further divided by the number of wind turbines currently in operation in the wind farm, the average reactive power Q cmd_WT_Avg of a single wind turbine can be obtained.
  • the first voltage value is calculated according to the difference between the preset voltage upper limit value and the grid-connected point voltage
  • the first voltage value is calculated according to the difference between the preset voltage lower limit value and the grid-connected point voltage.
  • the grid-connected point voltage may be a filtered voltage value.
  • the difference between the fourth optional implementation and the second optional implementation is that the control target of the plant is the voltage of the grid-connected point of the wind farm.
  • the wind farm can use SVG (Static Var Generator, Static Var Generator) and other auxiliary equipment to perform reactive power compensation at the station end, instead of performing overall reactive power compensation for the wind turbine cluster, which can solve the problem of large reactive power.
  • SVG Static Var Generator, Static Var Generator
  • the problem of fault protection of wind turbines in certain positions is caused by the power of wind farms, so as to maximize the non-functioning capacity of wind farm wind farm clusters.
  • Fig. 6 shows a schematic structural diagram of a device for regulating reactive power in a wind farm provided by an embodiment of the present application.
  • the device for adjusting reactive power in a wind farm provided in the embodiment of the present application may be used to implement the method for adjusting reactive power in a wind farm provided in the embodiment of the present application.
  • For the parts not detailed in the embodiment of the device for adjusting reactive power in a wind farm provided in the embodiment of the present application reference may be made to the description in the embodiment of the method for adjusting reactive power in a wind farm provided in the embodiment of the present application.
  • the reactive power adjustment device in the wind farm provided by the embodiment of the present application includes an acquisition unit 11 , a calculation unit 12 , a correction unit 13 and an output unit 14 .
  • the acquisition unit 11 is used to acquire the reactive power control parameters of the wind farm sent by the power grid to the wind farm;
  • the calculation unit 12 is used to calculate the average reactive power control parameters of a single unit in the wind farm according to the reactive power control parameters of the wind farm;
  • the correction unit 13 is used to correct the average reactive power control parameter of the corresponding unit according to the difference between the grid-connected point voltage of each unit and the preset voltage limit, so as to obtain the reactive power control parameter of a single unit of the corresponding unit;
  • the output unit 14 is used to output the reactive power control parameters of a single unit of the corresponding unit to each unit.
  • computing unit 12 may include:
  • the first calculation subunit is used to calculate the reactive power loss parameter of the reactive power control parameter of the wind farm according to the on-site loss coefficient
  • the first adjustment subunit is used to adjust the reactive parameter difference through the first proportional integral controller to obtain the reactive parameter error; wherein, the reactive parameter difference is the reactive control parameter of the wind farm and the grid-connected point collection of the wind farm The difference between the measured reactive parameters;
  • the second calculation subunit is used to calculate the average reactive power control parameter according to the sum of the reactive power loss parameter and the reactive power parameter error, and the number of generating units in the wind farm.
  • the measured reactive parameter is also a reactive power value; when the reactive power control parameter of the wind farm is a reactive voltage value, the measured reactive power The parameter is also the reactive voltage value.
  • correction unit 13 may include:
  • the third calculation subunit is used to calculate the first voltage value according to the difference between the preset voltage upper limit value and the grid-connected point voltage;
  • the fourth calculation subunit is used to calculate the second voltage value according to the difference between the preset voltage lower limit value and the grid-connected point voltage;
  • the fifth calculation subunit is used to limit the first voltage value to not less than 0, and limit the second voltage value to not greater than 0, and calculate the reactive power control correction parameter of the corresponding unit according to the first voltage value and the second voltage value ;
  • the sixth calculation subunit is used to calculate the sum of the average reactive power control parameter and the reactive power control correction parameter to obtain the reactive power control parameter of a single unit corresponding to the unit.
  • the third calculation subunit can also be used to calculate the difference between the preset voltage upper limit value and the grid-connected point voltage to obtain the first voltage value;
  • the fourth calculation subunit can also be used to calculate the difference between the preset voltage lower limit value and the grid-connected point voltage to obtain the second voltage value;
  • the fifth calculation subunit can also be used to calculate the sum of the first voltage value and the second voltage value to obtain the third voltage value; and calculate the product of the third voltage value and the droop coefficient to obtain the reactive power control correction parameter.
  • the third calculation subunit can also be used to adjust the difference between the preset voltage upper limit and the grid-connected point voltage through the second proportional-integral controller to obtain the first voltage value;
  • the fourth calculation subunit can also be used to adjust the difference between the preset voltage lower limit and the grid-connected point voltage through the third proportional-integral controller to obtain the second voltage value;
  • the fifth calculation subunit can also be used to calculate the sum of the first voltage value and the second voltage value to obtain reactive power control correction parameters.
  • the grid-connected point voltage may be a filtered voltage value.
  • the output unit 14 may include:
  • the second adjustment subunit is used to adjust the difference between the reactive power control parameters of a single unit and the reactive parameters collected at the grid connection point of the corresponding unit through the fourth proportional integral controller, so as to obtain the reactive current target of the corresponding unit value;
  • the control sub-unit is used to control the reactive current of the corresponding generating set based on the reactive current target value.
  • the reactive power adjusting device in the wind farm may be set in the controller of the wind farm or the converter of the wind power generating set.
  • the wind farm controller (Wind Farm Controller, WFC) is the hardware carrier of the cluster control system on the wind farm side to realize the cluster control decision of the wind turbines. It can include two parts: real-time core part and non-real-time core part. WFC can Execute the control of the wind turbines in the wind farm.
  • the reactive power adjustment device in the wind farm obtains the reactive power control parameters of the wind farm sent by the power grid to the wind farm; according to the reactive power control parameters of the wind farm, calculates the average reactive power control parameter of a single unit in the wind farm ;According to the difference between the grid-connected point voltage of each unit and the preset voltage limit, the average reactive power control parameters of the corresponding unit are corrected to obtain the reactive power control parameters of the corresponding unit for a single unit; output to each unit The reactive power control parameters of a single unit corresponding to the unit. According to the embodiment of the present application, it can solve the technical problem in the related art that the reactive power of the unit cluster in the wind farm is limited due to the different voltages of different machines.
  • the embodiment of the present application also provides an electronic device, the electronic device includes: a processor and a memory storing program instructions; when the processor executes the program instructions, the method for adjusting reactive power in a wind farm provided by the embodiment of the present application can be realized .
  • the electronic device may be arranged in a controller of a wind farm or a converter of a wind power generating set.
  • FIG. 7 shows a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.
  • the electronic device may include a processor 301 and a memory 302 storing program instructions.
  • the above-mentioned processor 301 may include a central processing unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • Memory 302 may include mass storage for data or instructions.
  • memory 302 may include a hard disk drive (Hard Disk Drive, HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (Universal Serial Bus, USB) drive or two or more Combinations of multiple of the above.
  • Storage 302 may include removable or non-removable (or fixed) media, where appropriate. Under appropriate circumstances, the storage 302 can be inside or outside the comprehensive gateway disaster recovery device.
  • memory 302 is a non-volatile solid-state memory.
  • memory 302 includes read-only memory (ROM).
  • ROM read-only memory
  • the ROM may be mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or A combination of two or more of the above.
  • Memory may include read only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices.
  • ROM read only memory
  • RAM random access memory
  • magnetic disk storage media devices e.g., magnetic disks
  • optical storage media devices e.g., magnetic disks
  • flash memory devices e.g., electrical, optical, or other physical/tangible memory storage devices.
  • the processor 301 reads and executes the program instructions stored in the memory 302 to implement any method for adjusting reactive power in a wind farm in the above-mentioned embodiments.
  • the electronic device may further include a communication interface 303 and a bus 310 .
  • the processor 301 , the memory 302 , and the communication interface 303 are connected through a bus 310 to complete mutual communication.
  • the communication interface 303 is mainly used to realize the communication between various modules, devices, units and/or devices in the embodiments of the present application.
  • Bus 310 includes hardware, software, or both, and couples the components of the electronic device to each other.
  • the bus may include Accelerated Graphics Port (AGP) or other graphics bus, Enhanced Industry Standard Architecture (EISA) bus, Front Side Bus (FSB), HyperTransport (HT) interconnect, Industry Standard Architecture (ISA) Bus, Infiniband Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Micro Channel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of these.
  • Bus 310 may comprise one or more buses, where appropriate. Although the embodiments of this application describe and illustrate a particular bus, this application contemplates any suitable bus or interconnect.
  • the embodiment of the present application may provide a readable storage medium for implementation.
  • the readable storage medium stores program instructions; when the program instructions are executed by the processor, any method for adjusting reactive power in the wind farm in the above-mentioned embodiments is implemented.
  • the functional blocks shown in the structural block diagrams described above may be implemented as hardware, software, firmware, or a combination thereof.
  • hardware When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, or the like.
  • ASIC application specific integrated circuit
  • the elements of the present application are the programs or code segments employed to perform the required tasks.
  • Programs or code segments can be stored in machine-readable media, or transmitted over transmission media or communication links by data signals carried in carrier waves.
  • "Machine-readable medium" may include any medium that can store or transmit information.
  • machine-readable media examples include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like.
  • Code segments may be downloaded via a computer network such as the Internet, an Intranet, or the like.
  • processors may be, but are not limited to, general purpose processors, special purpose processors, application specific processors, or field programmable logic circuits. It can also be understood that each block in the block diagrams and/or flowcharts and combinations of blocks in the block diagrams and/or flowcharts can also be realized by dedicated hardware for performing specified functions or actions, or can be implemented by dedicated hardware and Combination of computer instructions to achieve.

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Abstract

本申请公开了一种风电场内无功功率的调节方法、装置及电子设备。该风电场内无功功率的调节方法包括：获取电网对风电场发出的风电场无功控制参数；根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；向每个机组输出对应机组的单台机组无功控制参数。

Description

风电场内无功功率的调节方法、装置及电子设备
相关申请的交叉引用
本申请要求享有于2021年12月30日提交名称为“风电场内无功功率的调节方法、装置及电子设备”的中国专利申请202111682431.7的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及功率调节技术领域，特别是涉及一种风电场内无功功率的调节方法、装置及电子设备。
背景技术
在风电场的内部，由于各机组的机位点与升压站的传输线距离不一致，各机位的电压存在差异性。当风电场调节无功功率时，为了避免电压最高或最低的机位触发风机电压保护，需要以电压最高和最低的机组来限制风电场无功功率的调节，导致风电场内机组集群的无功功率受到限制。
发明内容
本申请实施例提供一种风电场内无功功率的调节方法、装置及电子设备，能够解决相关技术中不同机位电压不同导致风电场内机组集群的无功功率受到限制的技术问题。
本申请第一方面的实施例提供一种风电场内无功功率的调节方法，该方法包括：
获取电网对风电场发出的风电场无功控制参数；
根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；
根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组 的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；
向每个机组输出对应机组的单台机组无功控制参数。
本申请第二方面的实施例提供了一种风电场内无功功率的调节装置，该装置包括：
获取单元，用于获取电网对风电场发出的风电场无功控制参数；
计算单元，用于根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；
修正单元，用于根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；
输出单元，用于向每个机组输出对应机组的单台机组无功控制参数。
本申请第三方面的实施例提供了一种电子设备，该电子设备包括：处理器以及存储有程序指令的存储器；处理器执行程序指令时实现如本申请第一方面的实施例提供的风电场内无功功率的调节方法。
本申请第四方面的实施例提供了一种可读存储介质，该可读存储介质上存储有程序指令，程序指令被处理器执行时实现如本申请第一方面的实施例提供的风电场内无功功率的调节方法。
本申请第五方面的实施例提供了一种程序产品，该程序产品中的指令由电子设备的处理器执行时，使得电子设备能够执行如本申请第一方面的实施例提供的风电场内无功功率的调节方法。
本申请实施例的风电场内无功功率的调节方法、装置、电子设备、可读存储介质及程序产品，通过获取电网对风电场发出的风电场无功控制参数；根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；向每个机组输出对应机组的单台机组无功控制参数。根据本申请实施例，能够解决相关技术中不同机位电压不同导致风电场内机组集群的无功功率受到限制的技术问题，通过增加针对每个风机电压的自适应调节环节，在风机端电压接近故障保护阈值时，减少单机无功出力，避免进入故障状态， 继而提升风电场内风电机组集群的无功出力。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单的介绍，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请一个实施例提供的风电场内无功功率的调节方法的流程示意图；
图2a和图2b是本申请一个实施例提供的风电场内无功功率的调节方法的原理示意图；
图3a和图3b是本申请另一个实施例提供的风电场内无功功率的调节方法的原理示意图；
图4a和图4b是本申请另一个实施例提供的风电场内无功功率的调节方法的原理示意图；
图5a和图5b是本申请另一个实施例提供的风电场内无功功率的调节方法的原理示意图；
图6是本申请另一个实施例提供的风电场内无功功率的调节装置的结构示意图；
图7是本申请又一个实施例提供的电子设备的结构示意图。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例，为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施例，对本申请进行进一步详细描述。应理解，此处所描述的具体实施例仅意在解释本申请，而不是限定本申请。对于本领域技术人员来说，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请更好的理解。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者 暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
在风电场内部，由于各机位点距离升压站的传输线距离不一致，当风电场调节无功时，各机位的电压存在差异性，为了避免调无功触发风机电压保护，风电场的无功出力(无功功率)被电压最高、或最低的机组的无功能力限制，导致风机集群无功出力受限。
为了解决相关技术问题，本申请实施例提供了一种风电场内无功功率的调节方法、装置、设备及可读存储介质。下面首先对本申请实施例所提供的风电场内无功功率的调节方法进行介绍。
图1示出了本申请一个实施例提供的风电场内无功功率的调节方法的流程示意图。如图1所示，该方法包括如下步骤101～步骤104：
步骤101，获取电网对风电场发出的风电场无功控制参数。
电网对风电场发出的风电场无功控制参数可以是通过无功指令发出的。具体地，风电场无功控制参数可以是无功功率值，也可以是无功电压值。
步骤102，根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数。
风电场内单个机组的平均无功控制参数可以用于作为各个机组自适应调节的基准。
在根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数时，一个可选的实施方式为，根据场内折损系数计算风电场无功控制参数的无功折损参数，然后通过第一比例积分控制器，对无功参数差进行调节，得到无功参数误差，最后根据无功折损参数和无功参数误差之和，以及风电场内的机组数量，计算平均无功控制参数。
无功参数差为风电场无功控制参数和风电场的并网点采集到的测量无 功参数之差。在风电场无功控制参数为无功功率值的情况下，测量无功参数同样为无功功率值；在风电场无功控制参数为无功电压值的情况下，测量无功参数同样为无功电压值。
可选地，步骤102可以是场站执行的，对场站输出的平均无功控制参数，可以加上限幅环节，以限制场站环输出的平均无功控制参数的上下限。
步骤103，根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数。
步骤103用于自适应调节各个单台风机机组的无功控制参数。
可选地，在执行步骤103时，可以根据预设电压上限值与并网点电压之差，计算得到第一电压值，并根据预设电压下限值与并网点电压之差，计算得到第二电压值，进而，将第一电压值限制为不小于0，且第二电压值限制为不大于0，以第一电压值和第二电压值的约束条件，根据第一电压值和第二电压值，计算对应机组的无功控制修正参数。在得到无功控制修正参数之后，计算平均无功控制参数和无功控制修正参数之和，得到对应机组的单台机组无功控制参数。
步骤104，向每个机组输出对应机组的单台机组无功控制参数。
在得到自适应调节后的各个单台机组无功控制参数之后，可以向每个机组输出对应机组的单台机组无功控制参数，从而对各个机组进行控制。
可选地，在向每个机组输出对应机组的单台机组无功控制参数时，可以通过第四比例积分控制器，对单台机组无功控制参数与在对应机组的并网点采集到的无功参数之差进行调节，得到对应机组的无功电流目标值，并以无功电流目标值为目标，控制对应机组的无功电流。
本申请实施例的风电场内无功功率的调节方法，通过获取电网对风电场发出的风电场无功控制参数；根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；向每个机组输出对应机组的单台机组无功控制参数。根据本申请实施例，能够解决相关技术中不同机位电压不同导致风 电场内机组集群的无功功率受到限制的技术问题，通过增加针对每个风机电压的自适应调节环节，在风机端电压接近故障保护阈值时，减少单机无功出力，避免进入故障状态，继而提升风电场内风电机组集群的无功出力。
下面对本申请实施例提供的风电场内无功功率的调节方法的几种可选的实施方式进行描述如下。
第一种可选的实施方式：
在根据预设电压上限值与并网点电压之差，计算得到第一电压值时，可以计算预设电压上限值与并网点电压之差，得到第一电压值；在根据预设电压下限值与并网点电压之差，计算得到第二电压值时，可以计算预设电压下限值与并网点电压之差，得到第二电压值。
进而，在根据第一电压值和第二电压值，计算对应机组的无功控制修正参数时，可以计算第一电压值和第二电压值之和，得到第三电压值，计算第三电压值与下垂系数之积，得到无功控制修正参数。
一个具体示例的控制原理的示意图参见图2a和图2b，当风电场站收到电网给出的风电场无功控制参数(具体为风电场的无功功率)Q cmd_WF后，首先经过场站控制器将指令转化为单机的指令，具体过程为：
(1)风电场无功控制参数Q cmd_WF乘场内折损系数Kp形成前馈分量(无功折损参数)，作为主体分量。
(2)将风电场无功控制参数Q cmd_WF与风电场并网点采集的无功功率(测量无功参数)Q smp_WF做差，得到无功参数差，再经过比例积分(proportional integral controller，PI)控制器(第一比例积分控制器)进行闭环调节，得出消除误差的分量(无功参数误差)。
其中，本申请实施例中所述的PI控制器的一个示例的公式为
Figure PCTCN2022080727-appb-000001
(3)将前馈分量(无功折损参数)与误差消除分量(无功参数误差)加和，(经过限幅处理之后)除以当前风电场运行风电机组数量WT_num，并进行限幅处理之后，得出单台风机的平均无功控制参数Q cmd_WT_Avg。
除了得到平均无功控制参数Q cmd_WT_Avg后，还根据单台单机并网点电压对其进行无功功率进行自适应分配，自适应策略的分配流程包括：
(1)采集单台风机并网点电压E g，通过1/(Ts+1)滤波器进行滤波。
(2)将第一电压值(即电压上限UpLimit-E g滤波值)的最大值限制为0，第二电压值(即电压下限DownLimit-E g滤波值)的最小值限制为0，上述的限制可以称为限幅处理，经过限幅处理后将第一电压值和第二电压值加和，然后乘下垂系数K Droop，并进一步的通过滤波器滤波，可以得出单台风机无功指令自适应修正值(无功控制修正参数)Q cmd_WT_Adp。
将单台风机平均无功功率(平均无功控制参数)Q cmd_WT_Avg与单台风机无功指令自适应修正值(无功控制修正参数)Q cmd_WT_Adp加和，得到单台风机无功功率(单台机组无功控制参数)Q cmd_WT。
在得到单台风机无功功率Q cmd_WT后，向对应的单台风机输出控制。单机环的执行策略具体可以包括：
(1)将单台风机无功功率Q cmd_WT与单台风机并网点采集的无功功率Q smp_WT做差，经PI控制器进行闭环调节，得出无功电流目标值Iq_Ref。
(2)单台风机按照Iq_Ref输出相应的无功电流。
第二种可选的实施方式：
在第一种可选的实施方式的基础上，在执行根据预设电压上限值与并网点电压之差，计算得到第一电压值，以及根据预设电压下限值与并网点电压之差，计算得到第二电压值时，并网点电压可以是经过滤波之后的电压值。
参考图3a和图3b，第二种可选的实施方式与第一种可选的实施方式的区别在于，自适应策略中修正值(无功控制修正参数)Q cmd_WT_Adp采用PI控制器实现，具体的实施方式包括：
(1)采集单台风机并网点电压E g，进行滤波，得到滤波之后的并网点电压。
(2)电压上限UpLimit与E g滤波值做差，经PI控制器调节得出调节值1，调节值1的上限幅为0。
(3)电压下限DownLimit与E g滤波值做差，经PI控制器调节得出调节值2，调节值2的下限幅值为0。
(4)将限幅后的调节值1与调节值2加和，得出单台风机无功指令自适应修正值Q cmd_WT_Adp。
(5)将单台风机平均无功功率指令Q cmd_WT_Avg与单台风机无功指令自适应修正值Q cmd_WT_Adp加和，得到单台风机无功功率Q cmd_WT。
第三种可选的实施方式：
在根据预设电压上限值与并网点电压之差，计算得到第一电压值时，可以通过第二比例积分控制器，对预设电压上限值与并网点电压之差进行调节，得到第一电压值，在根据预设电压下限值与并网点电压之差，计算得到第二电压值时，可以通过第三比例积分控制器，对预设电压下限值与并网点电压之差进行调节，得到第二电压值。进而，在根据第一电压值和第二电压值，计算对应机组的无功控制修正参数时，可以计算第一电压值和第二电压值之和，得到无功控制修正参数。
参考图4a和图4b，第三种可选的实施方式与第一种可选的实施方式的区别在于，场站控制目标为风电场并网点的电压。
具体来说，将风电场场站电压目标值V cmd_WT与风电场并网点电压V cmd_WT做差，经PI控制器(第二比例积分控制器)的闭环调节，以及PI控制器(第三比例积分控制器)的输出，并进一步除以当前风电场运行风电机组数量，得出单台风机平均无功功率Q cmd_WT_Avg。
第四种可选的实施方式：
在第一种可选的实施方式的基础上，在执行根据预设电压上限值与并网点电压之差，计算得到第一电压值，以及根据预设电压下限值与并网点电压之差，计算得到第二电压值时，并网点电压可以是经过滤波之后的电压值。
参考图5a和图5b，第四种可选的实施方式与第二种可选的实施方式的区别在于，场站控制目标为风电场并网点的电压。
将风电场场站电压目标值V cmd_WF与风电场并网点电压V cmd_WT做差，经PI控制器(第二比例积分控制器)的闭环调节，以及PI控制器(第三比例积分控制器)的输出，并进一步除以当前风电场运行风电机组数量，得出单台风机平均无功功率Q cmd_WT_Avg。
在本申请实施例中，风电场可以通过SVG(Static Var Generator，静止无功发生器)等辅助设备在场站端进行无功补偿，而不是对风机集群进行 整体的无功补偿，能够解决大无功功率引发某些机位的风机机组故障保护的问题，从而实现风电场风机集群的无功能力最大化。
图6示出了本申请一个实施例提供的风电场内无功功率的调节装置的结构示意图。本申请实施例提供的风电场内无功功率的调节装置，可以用于执行本申请实施例提供的风电场内无功功率的调节方法。在本申请实施例提供的风电场内无功功率的调节装置的实施例中未详述的部分，可以参考本申请实施例提供的风电场内无功功率的调节方法的实施例中的说明。
如图6所示，本申请实施例提供的风电场内无功功率的调节装置包括获取单元11，计算单元12，修正单元13和输出单元14。
获取单元11用于获取电网对风电场发出的风电场无功控制参数；
计算单元12用于根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；
修正单元13用于根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；
输出单元14用于向每个机组输出对应机组的单台机组无功控制参数。
可选地，计算单元12可以包括：
第一计算子单元，用于根据场内折损系数计算风电场无功控制参数的无功折损参数；
第一调节子单元，用于通过第一比例积分控制器，对无功参数差进行调节，得到无功参数误差；其中，无功参数差为风电场无功控制参数和风电场的并网点采集到的测量无功参数之差；
第二计算子单元，用于根据无功折损参数和无功参数误差之和，以及风电场内的机组数量，计算平均无功控制参数。
可选地，在风电场无功控制参数为无功功率值的情况下，测量无功参数同样为无功功率值；在风电场无功控制参数为无功电压值的情况下，测量无功参数同样为无功电压值。
可选地，修正单元13可以包括：
第三计算子单元，用于根据预设电压上限值与并网点电压之差，计算 得到第一电压值；
第四计算子单元，用于根据预设电压下限值与并网点电压之差，计算得到第二电压值；
第五计算子单元，用于将第一电压值限制为不小于0，且第二电压值限制为不大于0，根据第一电压值和第二电压值，计算对应机组的无功控制修正参数；
第六计算子单元，用于计算平均无功控制参数和无功控制修正参数之和，得到对应机组的单台机组无功控制参数。
可选地，第三计算子单元还可以用于计算预设电压上限值与并网点电压之差，得到第一电压值；
第四计算子单元还可以用于计算预设电压下限值与并网点电压之差，得到第二电压值；
第五计算子单元还可以用于计算第一电压值和第二电压值之和，得到第三电压值；以及计算第三电压值与下垂系数之积，得到无功控制修正参数。
可选地，第三计算子单元还可以用于通过第二比例积分控制器，对预设电压上限值与并网点电压之差进行调节，得到第一电压值；
第四计算子单元还可以用于通过第三比例积分控制器，对预设电压下限值与并网点电压之差进行调节，得到第二电压值；
第五计算子单元还可以用于计算第一电压值和第二电压值之和，得到无功控制修正参数。
可选地，并网点电压可以为经过滤波之后的电压值。
可选地，输出单元14可以包括：
第二调节子单元，用于通过第四比例积分控制器，对单台机组无功控制参数与在对应机组的并网点采集到的无功参数之差进行调节，得到对应机组的无功电流目标值；
控制子单元，用于以无功电流目标值为目标，控制对应机组的无功电流。
可选地，本申请实施例提供的风电场内无功功率的调节装置可以设置 在风电场的控制器或风力发电机组的变流器中。其中，风电场控制器(Wind Farm Controller，WFC)是场群控制系统在风电场侧实现对风电机组的集群控制决策的硬件载体，可以包括实时核部分和非实时核部分两部分，通过WFC可以执行对风电场内风电机组的控制。
本申请实施例的风电场内无功功率的调节装置，通过获取电网对风电场发出的风电场无功控制参数；根据风电场无功控制参数，计算风电场内单个机组的平均无功控制参数；根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；向每个机组输出对应机组的单台机组无功控制参数。根据本申请实施例，能够解决相关技术中不同机位电压不同导致风电场内机组集群的无功功率受到限制的技术问题，通过增加针对每个风机电压的自适应调节环节，在风机端电压接近故障保护阈值时，减少单机无功出力，避免进入故障状态，继而提升风电场内风电机组集群的无功出力。
本申请实施例还提供了一种电子设备，该电子设备包括：处理器以及存储有程序指令的存储器；处理器执行程序指令时可以实现本申请实施例提供的风电场内无功功率的调节方法。可选地，该电子设备可以设置在风电场的控制器或风力发电机组的变流器中。
图7示出了本申请实施例提供的电子设备的硬件结构示意图。
该电子设备可以包括处理器301以及存储有程序指令的存储器302。
具体地，上述处理器301可以包括中央处理器(CPU)，或者特定集成电路(Application Specific Integrated Circuit，ASIC)，或者可以被配置成实施本申请实施例的一个或多个集成电路。
存储器302可以包括用于数据或指令的大容量存储器。举例来说而非限制，存储器302可包括硬盘驱动器(Hard Disk Drive，HDD)、软盘驱动器、闪存、光盘、磁光盘、磁带或通用串行总线(Universal Serial Bus，USB)驱动器或者两个或更多个以上这些的组合。在合适的情况下，存储器302可包括可移除或不可移除(或固定)的介质。在合适的情况下，存储器302可在综合网关容灾设备的内部或外部。在特定实施例中，存储器302是非易失性固态存储器。
在特定实施例中，存储器302包括只读存储器(ROM)。在合适的情况下，该ROM可以是掩模编程的ROM、可编程ROM(PROM)、可擦除PROM(EPROM)、电可擦除PROM(EEPROM)、电可改写ROM(EAROM)或闪存或者两个或更多个以上这些的组合。
存储器可包括只读存储器(ROM)，随机存取存储器(RAM)，磁盘存储介质设备，光存储介质设备，闪存设备，电气、光学或其他物理/有形的存储器存储设备。因此，通常，存储器包括一个或多个编码有包括计算机可执行指令的软件的有形(非暂态)可读存储介质(例如，存储器设备)，并且当该软件被执行(例如，由一个或多个处理器)时，其可操作来执行参考根据本申请的一方面的方法所描述的操作。
处理器301通过读取并执行存储器302中存储的程序指令，以实现上述实施例中的任意一种风电场内无功功率的调节方法。
在一个示例中，电子设备还可包括通信接口303和总线310。其中，如图7所示，处理器301、存储器302、通信接口303通过总线310连接并完成相互间的通信。
通信接口303，主要用于实现本申请实施例中各模块、装置、单元和/或设备之间的通信。
总线310包括硬件、软件或两者，将电子设备的部件彼此耦接在一起。举例来说而非限制，总线可包括加速图形端口(AGP)或其他图形总线、增强工业标准架构(EISA)总线、前端总线(FSB)、超传输(HT)互连、工业标准架构(ISA)总线、无限带宽互连、低引脚数(LPC)总线、存储器总线、微信道架构(MCA)总线、外围组件互连(PCI)总线、PCI-Express(PCI-X)总线、串行高级技术附件(SATA)总线、视频电子标准协会局部(VLB)总线或其他合适的总线或者两个或更多个以上这些的组合。在合适的情况下，总线310可包括一个或多个总线。尽管本申请实施例描述和示出了特定的总线，但本申请考虑任何合适的总线或互连。
结合上述实施例中的风电场内无功功率的调节方法，本申请实施例可提供一种可读存储介质来实现。该可读存储介质上存储有程序指令；该程序指令被处理器执行时实现上述实施例中的任意一种风电场内无功功率的 调节方法。
需要明确的是，本申请并不局限于上文所描述并在图中示出的特定配置和处理。为了简明起见，这里省略了对已知方法的详细描述。在上述实施例中，描述和示出了若干具体的步骤作为示例。但是，本申请的方法过程并不限于所描述和示出的具体步骤，本领域的技术人员可以在领会本申请的精神后，作出各种改变、修改和添加，或者改变步骤之间的顺序。
以上所述的结构框图中所示的功能块可以实现为硬件、软件、固件或者它们的组合。当以硬件方式实现时，其可以例如是电子电路、专用集成电路(ASIC)、适当的固件、插件、功能卡等等。当以软件方式实现时，本申请的元素是被用于执行所需任务的程序或者代码段。程序或者代码段可以存储在机器可读介质中，或者通过载波中携带的数据信号在传输介质或者通信链路上传送。“机器可读介质”可以包括能够存储或传输信息的任何介质。机器可读介质的例子包括电子电路、半导体存储器设备、ROM、闪存、可擦除ROM(EROM)、软盘、CD-ROM、光盘、硬盘、光纤介质、射频(RF)链路，等等。代码段可以经由诸如因特网、内联网等的计算机网络被下载。
还需要说明的是，本申请中提及的示例性实施例，基于一系列的步骤或者装置描述一些方法或系统。但是，本申请不局限于上述步骤的顺序，也就是说，可以按照实施例中提及的顺序执行步骤，也可以不同于实施例中的顺序，或者若干步骤同时执行。
上面参考根据本申请的实施例的方法、装置(系统)和程序产品的流程图和/或框图描述了本申请的各方面。应当理解，流程图和/或框图中的每个方框以及流程图和/或框图中各方框的组合可以由程序指令实现。这些程序指令可被提供给通用计算机、专用计算机、或其它可编程数据处理装置的处理器，以产生一种机器，使得经由计算机或其它可编程数据处理装置的处理器执行的这些指令使能对流程图和/或框图的一个或多个方框中指定的功能/动作的实现。这种处理器可以是但不限于是通用处理器、专用处理器、特殊应用处理器或者现场可编程逻辑电路。还可理解，框图和/或流程图中的每个方框以及框图和/或流程图中的方框的组合，也可以由执行指 定的功能或动作的专用硬件来实现，或可由专用硬件和计算机指令的组合来实现。
以上所述，仅为本申请的具体实施方式，所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、模块和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。应理解，本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。

Claims (15)

  1. 一种风电场内无功功率的调节方法，包括：
    获取电网对风电场发出的风电场无功控制参数；
    根据所述风电场无功控制参数，计算所述风电场内单个机组的平均无功控制参数；
    根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；
    向每个机组输出对应机组的单台机组无功控制参数。
  2. 根据权利要求1所述的方法，其中，所述根据所述风电场无功控制参数，计算所述风电场内单个机组的平均无功控制参数，包括：
    根据场内折损系数计算所述风电场无功控制参数的无功折损参数；
    通过第一比例积分控制器，对无功参数差进行调节，得到无功参数误差；其中，所述无功参数差为所述风电场无功控制参数和所述风电场的并网点采集到的测量无功参数之差；
    根据所述无功折损参数和所述无功参数误差之和，以及所述风电场内的机组数量，计算所述平均无功控制参数。
  3. 根据权利要求2所述的方法，其中，在所述风电场无功控制参数为无功功率值的情况下，所述测量无功参数同样为无功功率值；在所述风电场无功控制参数为无功电压值的情况下，所述测量无功参数同样为无功电压值。
  4. 根据权利要求2所述的方法，其中，所述根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数，包括：
    根据预设电压上限值与所述并网点电压之差，计算得到第一电压值；
    根据预设电压下限值与所述并网点电压之差，计算得到第二电压值；
    将所述第一电压值限制为不小于0，且所述第二电压值限制为不大于0，根据所述第一电压值和所述第二电压值，计算对应机组的无功控制修正参数；
    计算所述平均无功控制参数和所述无功控制修正参数之和，得到对应机组的所述单台机组无功控制参数。
  5. 根据权利要求4所述的方法，其中，
    所述根据预设电压上限值与所述并网点电压之差，计算得到第一电压值，包括：
    计算所述预设电压上限值与所述并网点电压之差，得到所述第一电压值；
    所述根据预设电压下限值与所述并网点电压之差，计算得到第二电压值，包括：
    计算所述预设电压下限值与所述并网点电压之差，得到所述第二电压值；
    所述根据所述第一电压值和所述第二电压值，计算对应机组的无功控制修正参数，包括：
    计算所述第一电压值和所述第二电压值之和，得到第三电压值；
    计算所述第三电压值与下垂系数之积，得到所述无功控制修正参数。
  6. 根据权利要求4所述的方法，其中，
    所述根据预设电压上限值与所述并网点电压之差，计算得到第一电压值，包括：
    通过第二比例积分控制器，对所述预设电压上限值与所述并网点电压之差进行调节，得到所述第一电压值；
    所述根据预设电压下限值与所述并网点电压之差，计算得到第二电压值，包括：
    通过第三比例积分控制器，对所述预设电压下限值与所述并网点电压之差进行调节，得到所述第二电压值；
    所述根据所述第一电压值和所述第二电压值，计算对应机组的无功控制修正参数，包括：
    计算所述第一电压值和所述第二电压值之和，得到所述无功控制修正参数。
  7. 根据权利要求4所述的方法，其中，在执行所述根据预设电压上限 值与所述并网点电压之差，计算得到第一电压值的步骤，以及所述根据预设电压下限值与所述并网点电压之差，计算得到第二电压值的步骤时，所述并网点电压为经过滤波之后的电压值。
  8. 根据权利要求1所述的方法，其中，所述向每个机组输出对应机组的单台机组无功控制参数，包括：
    通过第四比例积分控制器，对所述单台机组无功控制参数与在对应机组的所述并网点采集到的无功参数之差进行调节，得到对应机组的无功电流目标值；
    以所述无功电流目标值为目标，控制对应机组的无功电流。
  9. 一种风电场内无功功率的调节装置，所述装置包括：
    获取单元，用于获取电网对风电场发出的风电场无功控制参数；
    计算单元，用于根据所述风电场无功控制参数，计算所述风电场内单个机组的平均无功控制参数；
    修正单元，用于根据每台机组的并网点电压与预设电压限值之间的差值，对对应机组的平均无功控制参数进行修正，得到对应机组的单台机组无功控制参数；
    输出单元，用于向每个机组输出对应机组的单台机组无功控制参数。
  10. 根据权利要求9所述的装置，其中，所述计算单元包括：
    第一计算子单元，用于根据场内折损系数计算所述风电场无功控制参数的无功折损参数；
    第一调节子单元，用于通过第一比例积分控制器，对无功参数差进行调节，得到无功参数误差；其中，所述无功参数差为所述风电场无功控制参数和所述风电场的并网点采集到的测量无功参数之差；
    第二计算子单元，用于根据所述无功折损参数和所述无功参数误差之和，以及所述风电场内的机组数量，计算所述平均无功控制参数。
  11. 根据权利要求10所述的装置，其中，所述风电场内无功功率的调节装置设置在风电场的控制器或风力发电机组的变流器中。
  12. 一种电子设备，所述电子设备包括：处理器以及存储有程序指令的存储器；
    所述处理器执行所述程序指令时实现如权利要求1-8任意一项所述的风电场内无功功率的调节方法。
  13. 根据权利要求12所述的电子设备，其中，所述电子设备设置在风电场的控制器或风力发电机组的变流器中。
  14. 一种可读存储介质，所述可读存储介质上存储有程序指令，所述程序指令被处理器执行时实现如权利要求1-8任意一项所述的风电场内无功功率的调节方法。
  15. 一种程序产品，所述程序产品中的指令由电子设备的处理器执行时，使得所述电子设备执行如权利要求1-8任意一项所述的风电场内无功功率的调节方法。
PCT/CN2022/080727 2021-12-30 2022-03-14 风电场内无功功率的调节方法、装置及电子设备 WO2023123686A1 (zh)

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Citations (3)

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Publication number Priority date Publication date Assignee Title
CN102299527A (zh) * 2011-08-23 2011-12-28 国电联合动力技术有限公司 一种风电场无功功率控制方法和系统
CN105244923A (zh) * 2015-09-11 2016-01-13 中国电力科学研究院 一种基于双馈风电机组的风电场无功功率控制方法
US20170338652A1 (en) * 2016-05-19 2017-11-23 General Electric Company System and Method for Balancing Reactive Power Loading Between Renew able Energy Power Systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102299527A (zh) * 2011-08-23 2011-12-28 国电联合动力技术有限公司 一种风电场无功功率控制方法和系统
CN105244923A (zh) * 2015-09-11 2016-01-13 中国电力科学研究院 一种基于双馈风电机组的风电场无功功率控制方法
US20170338652A1 (en) * 2016-05-19 2017-11-23 General Electric Company System and Method for Balancing Reactive Power Loading Between Renew able Energy Power Systems

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