WO2024002387A1 - Control debugging method for off-grid wind storage load power generation system - Google Patents

Control debugging method for off-grid wind storage load power generation system Download PDF

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Publication number
WO2024002387A1
WO2024002387A1 PCT/CN2023/111740 CN2023111740W WO2024002387A1 WO 2024002387 A1 WO2024002387 A1 WO 2024002387A1 CN 2023111740 W CN2023111740 W CN 2023111740W WO 2024002387 A1 WO2024002387 A1 WO 2024002387A1
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WIPO (PCT)
Prior art keywords
energy storage
storage system
voltage
control
load
Prior art date
Application number
PCT/CN2023/111740
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French (fr)
Chinese (zh)
Inventor
李相俊
李焓宁
董立志
贾学翠
王上行
惠东
刘家亮
Original Assignee
中国电力科学研究院有限公司
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Priority to AU2023296594A priority Critical patent/AU2023296594A1/en
Publication of WO2024002387A1 publication Critical patent/WO2024002387A1/en

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Classifications

    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • 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
    • H02J3/24—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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • 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
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • 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
    • H02J3/38—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
    • 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
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
    • 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

Definitions

  • This application relates to but is not limited to the technical fields of wind power generation and energy storage, and in particular, to a control and debugging method for an off-grid wind load storage power generation system.
  • the purpose of the embodiments of this application is to provide a control and debugging method for an off-grid wind load storage power generation system to solve the problem that the existing off-grid wind load storage system is prone to overvoltage at the wind turbine end due to the existence of long-distance power cables, causing Technical problems causing unstable system operation.
  • the embodiment of the present application provides an off-grid wind load storage power generation system, including: a wind power generation branch, an energy storage branch, an active load and a circuit breaker K2;
  • the wind power generation branch and circuit breaker K2 are connected in series and then connected in parallel with the energy storage branch and active load, and then connected to the high-voltage bus 200; the wind power generation branch includes a wind generator.
  • the wind power generation branch also includes a circuit breaker K1, a converter, a box transformer T1 and a wind turbine grid-connected cable;
  • the circuit breaker K1 and the converter are connected in parallel to form a parallel branch;
  • the output end of the wind turbine is connected to the low-voltage side of the box-type transformer T1 through a parallel branch; the high-voltage side of the box-type transformer T1 is connected to the circuit breaker K2 through the wind turbine grid connection cable.
  • the energy storage branch includes a voltage source energy storage system 300, a current source energy storage system 400, and a box-type transformer T2;
  • the voltage source energy storage system and the current source energy storage system are connected in parallel and connected to the high-voltage bus through the box-type transformer T2.
  • the voltage source energy storage system includes several voltage source energy storage devices connected in parallel; the current source energy storage system includes several current source energy storage devices connected in parallel.
  • the voltage source energy storage system adopts a virtual synchronous control mode.
  • the current source energy storage system adopts PQ control mode.
  • the wind turbine is a doubly fed asynchronous wind turbine.
  • the wind and load storage coordination control device is used to collect the voltage u 0 and current i 0 on the low-voltage side of the box-type transformer T2; and Decouple the voltage u 0 and current i 0 and calculate the reactive power Q A generated by the low-voltage side of the header transformer T2; control the current source energy storage system and set the reactive power of the current source energy storage system
  • the power reference value is the inverse of the reactive power at the low-voltage side of transformer T2, forming a closed-loop control.
  • embodiments of the present application also provide a method for controlling and debugging an off-grid wind load storage power generation system.
  • the off-grid wind load storage power generation system is an off-grid wind storage power generation system provided by embodiments of the present application.
  • Charge generation system, the control and debugging method includes:
  • the circuit breaker K2 is controlled to open, the energy storage branch is put in, and part of the active load is put in. At this time, an off-grid load storage system is formed;
  • the circuit breaker K2 is controlled to close and the wind turbine starts to work; the output power of the energy storage branch is controlled with the reactive power at the output end of the energy storage branch as a command.
  • the stator voltage of the wind turbine begins to synchronize with the external voltage of the wind turbine, and reaches
  • the grid-connected conditions are preset, and an off-grid wind load storage system is formed at this time;
  • the wind turbine outputs active power according to a given power ramp. During the active power ramping process of the wind turbine, the active load is gradually put into it.
  • the control circuit breaker K2 is opened, the energy storage branch is put in, and a part of the active load is put in.
  • the off-grid load storage system includes:
  • the starting voltage source energy storage system and the current source energy storage system convert the active load into In the step of constructing an off-grid load storage system, the active load Less than or equal to the total capacity of the voltage source energy storage system.
  • the starting voltage source energy storage system and the current source energy storage system convert the active load into In the step of constructing an off-grid load storage system, the output active power of the voltage source energy storage system is equal to the input active load.
  • control circuit breaker K2 is closed and the wind turbine starts to work; the reactive power at the output end of the energy storage branch is used as a command to control the output power of the energy storage branch, and the stator voltage of the wind turbine is equal to The external voltage of the wind turbine begins to synchronize and reaches the preset grid connection conditions.
  • the off-grid wind load storage system includes:
  • the stator voltage of the wind turbine starts to synchronize with the external voltage of the wind turbine. After reaching the preset grid connection conditions, the circuit breaker K1 is closed to form an off-grid wind load storage system.
  • the preset grid connection condition is specifically: the stator voltage of the wind turbine is completely consistent with the frequency, phase, and amplitude of the external voltage.
  • the step of measuring the reactive power at the low-voltage side of the box-type transformer T2 and using its inverse as the reactive power input command of the current source energy storage system specifically includes: measuring the reactive power at the low-voltage side of the box-type transformer T2;
  • the reactive power reference value of the current source energy storage system is set to the opposite number of the reactive power on the low-voltage side of the transformer T2 to form a closed-loop control.
  • the step of gradually putting in active load during the active power ramping process of the wind turbine specifically includes:
  • the power of the wind turbine begins to climb, and the active load is dynamically put into operation in batches at this time; after the output power of the wind turbine stabilizes at time t 2 , the active power and reactive power output by the wind turbine stabilize to the set values respectively; this The active load input at the time is the same as the set value of the wind turbine.
  • the reactive power of the current source energy storage system is continuously reduced until time t2 is completely switched out.
  • the embodiment of the present application provides a control and debugging method for an off-grid wind load storage power generation system.
  • the multiple types of hybrid energy storage systems used can achieve accurate output of voltage, frequency and active power; avoiding the need to only use a voltage source type Energy storage causes overvoltage problems caused by reactive power deviation caused by long cables.
  • Energy storage causes overvoltage problems caused by reactive power deviation caused by long cables.
  • black starts of fans can be achieved on different lines, which is of great significance for the start-up of off-grid remote fans and the stable operation of the system. .
  • the embodiment of this application first establishes stable voltage and frequency through energy storage black start, then starts the wind turbine, and performs dynamic equipment switching and real-time power optimization control on the wind turbine, energy storage, and load operating in the isolated grid according to the power coordinated control debugging method. .
  • the embodiment of this application can avoid overvoltage problems caused by long cables when the inductive load is insufficient during the networking process, which is conducive to stable operation of the system.
  • control and debugging method can be separated from the support of the large power grid to realize power supply to surrounding loads. It is very suitable for areas such as desert areas, forest areas, and islands that cannot be effectively covered by large power grids, and is of great significance for alleviating the tight power supply.
  • Figure 1 is a schematic structural diagram of an off-grid wind load storage power generation system provided by an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of the wind load storage coordination control device provided by the embodiment of the present application.
  • Figure 3 is a schematic diagram of the power coordination control of the off-grid wind load storage system provided in the application embodiment
  • Figure 4 is a coordination control diagram of the power values of each unit of an off-grid wind load storage power generation system provided by the application embodiment
  • Figure 5 is a schematic diagram of the voltage source type energy storage automatic response power provided in the application embodiment.
  • voltage source energy storage uses traditional virtual synchronous control technology
  • when the wind storage system operates independently there are situations such as long cable overvoltage, load fluctuations, and wind turbine power ramping.
  • voltage source energy storage uses active power-frequency control and reactive power-voltage control, the frequency and voltage will deviate from the rated values or even exceed the limits.
  • this application sets the active power and reactive power of the fan according to the system load and line impedance. During the active power climbing process of the wind turbine, the active load is switched on and off, and the reactive power generated by the capacitive line is absorbed through the current source energy storage, and the reactive load is compensated to stabilize the system frequency and voltage.
  • This embodiment of the present application provides an off-grid wind load storage power generation system, including: a wind power generation branch, an energy storage branch, an active load and a circuit breaker K2; the wind power generation branch includes a wind turbine 100; the energy storage branch includes various types of hybrid energy storage systems; the wind power generation branch and circuit breaker K2 are connected in series and then connected in parallel with the energy storage branch and active load, and then connected to the high-voltage bus 200.
  • the hybrid energy storage system includes a voltage source energy storage system 300 and a current source energy storage system 400 .
  • the wind power generation branch also includes a circuit breaker K1, a converter 101, a box transformer T1, and a wind turbine grid-connected cable 500; the circuit breaker K1 and the converter 101 are connected in parallel to form a parallel branch.
  • the energy storage branch also includes a box-type transformer T2.
  • the voltage source energy storage system 300 and the current source energy storage system 400 are connected in parallel and connected to the high-voltage bus 200 through the box-type transformer T2.
  • the voltage source energy storage system 300 is composed of m voltage source energy storage devices 301 connected in parallel; the current source energy storage system 400 is composed of n current source energy storage devices 401 connected in parallel. Both m and n are positive integers greater than or equal to 1.
  • m voltage source energy storage devices 301 constitute a voltage source energy storage system 300
  • n current source energy storage devices 401 constitute a current source energy storage system 400.
  • the output terminals of m voltage source energy storage devices 301 and n current source energy storage devices 401 are connected to the low-voltage side of the box-type transformer T2, and the high-voltage side of the box-type transformer T2 is connected to the high-voltage bus 200.
  • the voltage source energy storage system 300 adopts a virtual synchronous control type, which is divided into active frequency control and reactive voltage control, which simulate the speed regulation and excitation system of the synchronous generator respectively.
  • the current source energy storage system 400 adopts the PQ control mode, which essentially decouples the active power and reactive power and controls them separately.
  • the active load P1 is connected to the high voltage bus 200 .
  • the hybrid energy storage system in which multiple machines of voltage source type and current source type energy storage are connected in parallel in the embodiment of the present application can not only achieve the stability of voltage and frequency and the accurate output of active power through voltage source type energy storage; at the same time, due to the use of transformers and long cables
  • the existence of current source energy storage can provide reactive power closed-loop support, avoiding overvoltage problems caused by reactive power deviation caused by long cables when only voltage source energy storage is used.
  • wind turbine 100 employs a doubly-fed asynchronous wind turbine.
  • an embodiment of the present application provides an off-grid wind load storage power generation system, including a wind load storage coordination control device 20; the wind load storage coordination control device includes a data acquisition module 201 and a power calculation module 202 , execution module 203 and communication management module 204.
  • the data acquisition module 201 is used to collect the voltage u 0 and current i 0 on the low-voltage side of the box-type transformer T2, as well as the operation information of the current source energy storage system 400 and the wind turbine 100.
  • Power calculation module 202 used to calculate the box type The voltage u 0 and current i 0 at the low-voltage side of the transformer T2 are decoupled, and the reactive power Q A generated by the low-voltage side of the header transformer T2 is calculated.
  • the execution module 203 is used to perform power control on the current source energy storage system 400, the active load P1 and the wind turbine 100 through the communication management module 204. When controlling the current source energy storage system 400, set the reactive power reference value of the current source energy storage system 400. Active power reference value Form closed loop control.
  • voltage source energy storage can establish stable voltage and frequency, provide the system with self-starting capability, and automatically respond to fluctuations in fans and active loads.
  • Current source energy storage can compensate the system's reactive power in time.
  • the wind-load storage coordination control device also controls the power of the active load so that the output active power of the voltage source type energy storage is maintained near 0.
  • the embodiment of the present application also provides a control and debugging method for an off-grid wind load storage power generation system.
  • the control and debugging method is implemented through steps S1 to S3:
  • the control circuit breaker K2 is opened, the energy storage branch is put in, and part of the active load is put in. At this time, an off-grid load storage system is formed.
  • the wind turbine 100 outputs active power according to a given power ramp, and gradually puts in the active load during the active power ramping process of the wind turbine.
  • step S1 may include:
  • the wind load storage coordination control device controls the circuit breaker K2 to open, starts the voltage source energy storage system 300 and the current source energy storage system 400, and puts in the active load
  • An off-grid load storage system is composed of mixed energy storage and active loads. Among them, the output active power of the voltage source energy storage system 300 is set to be equal to the input active load.
  • the current source energy storage system 400 outputs active power of 0.
  • step S2 may include:
  • the wind load storage coordination control device controls the circuit breaker K2 to close, completing the wind turbine side line connection.
  • the reactive power at the low-voltage side A of the box-type transformer T2 is measured, and its opposite is used as the reactive power input command of the current source energy storage system 400 to balance the power generated by the wind turbine grid-connected cable 500, box-type transformer T1, and box-type transformer T2. Reactive power.
  • the stator voltage of the wind turbine 100 begins to synchronize with the external voltage of the wind turbine.
  • the wind load storage coordination control device controls the wind turbine grid-connected circuit breaker K1 to close , the wind turbine 100 is fully connected to form an off-grid wind load storage system.
  • step S3 may include:
  • the wind turbine 100 outputs active power according to a given power ramp, and during the active power ramping process of the wind turbine, the active load is gradually put into the wind turbine.
  • the power output of the wind turbine 100 is stable, the wind, storage, and load complete the dynamic networking. This system has strong transient stability and can respond to fan output fluctuations and load switching.
  • the embodiment of this application proposes a control and debugging method for an off-grid wind load storage power generation system, which fully utilizes the advantages of voltage source type and current source type energy storage.
  • voltage source energy storage can establish stable system voltage and frequency, provide system self-starting capability, and quickly respond to active power fluctuations of wind turbines and active loads.
  • the embodiment of this application uses current source energy storage to provide reactive power compensation to maintain the system voltage at the rated value while controlling the dynamics of the active load. switching, reducing the voltage source The active power of the type energy storage regulates the pressure to maintain the system frequency at the rated value.
  • FIG. 3 After closing the circuit breaker K2, by measuring the voltage and current u 0 and i 0 at the low-voltage side A of the box-type transformer T2 and decoupling them, the wireless power emitted at A is calculated. Work power Q A .
  • Reactive power reference value of current source energy storage system 400 Active power reference value Form closed loop control.
  • the current source energy storage system 400 is used to absorb the inductive reactive power emitted from the fan side and the load side.
  • the inductive reactive power absorbed by the voltage source energy storage system 300 is close to 0, which can not only restore the energy storage voltage output to normal, but also respond in time. Changes in reactive load are conducive to black start and smooth operation of the system.
  • the active and reactive power instructions of the wind turbine 100 are as shown in formulas (1) and (2):
  • the wind storage power controlled by the control and debugging method of the off-grid wind load storage power generation system is shown in Figure 4.
  • the circuit breaker K2 is closed at time t 0 , and the power of the wind turbine 100 starts to climb at time t 1.
  • the active load is put in dynamically in batches, each time A total of n times, after the output power of t 2 stabilizes, the active power and reactive power output by the wind turbine 100 stabilize to the set values respectively. and The system black boot is completed.
  • the active load invested at this time is in, Starting from time t1 , the reactive power of the current source energy storage system 400 is continuously reduced until it is completely cut out at time t2 .
  • the reactive power of the current source type energy storage is continuously reduced.
  • the embodiment of this application considers the situation where there is no reactive power backup load.
  • the reactive power load P2 marked on Figure 1 is what will happen after the system black start is completed.
  • the generated reactive load the embodiment of the present application can control the reactive power of the current source type energy storage, and continue to maintain the balance of reactive power and the stability of voltage after the system operates stably.
  • Q1 is the capacitive reactive load generated after the system stabilizes
  • t3 is the time when this load is generated
  • t4 indicates that the capacitive load is cut out.
  • the response power of the voltage source energy storage system 300 is shown in Figure 5. According to the control and debugging method provided by the embodiment of the present application, its reactive power output is 0, and the active power output can be maintained near 0 after the wind turbine 100 climbs the slope. This avoids the problem of excessive system voltage and frequency deviation.
  • the reactive and active power output by the voltage source energy storage is reduced, so that the frequency and voltage of the system are maintained at the rated value; when the wind turbine starts
  • the rear energy storage system can automatically smooth the wind farm output fluctuations and also smooth the load output fluctuations.
  • the control and debugging method of the wind load storage system enables differentiated dynamic network control among the wind power generation system, energy storage system and load under off-grid operation and according to different operating conditions.
  • the energy storage black start is used to establish stable voltage and frequency, and then the wind turbines are started.
  • the power of wind turbines and energy storage operating in the isolated grid is optimized in real time according to the strategy, and the load is dynamically switched and controlled to realize the power supply and consumption of the entire system. Balanced and stable operation Depend on.
  • the embodiment of this application first gradually establishes an off-grid wind load storage system, and then controls the wind turbine, energy storage, and load power, which can solve the problems of long cable overvoltage, load fluctuation, and fan power during the establishment and operation of the wind load storage system.
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Eletrric Generators (AREA)
  • Wind Motors (AREA)

Abstract

The embodiments of the present application provide a control debugging method for an off-grid wind storage load power generation system. The system comprises a wind power generation branch provided with a wind power generator, an energy storage branch, an active load, and a circuit breaker. The wind power generation branch and the circuit breaker are connected in series, then connected in parallel with the energy storage branch and the active load, and then access a high-voltage bus. The present application controls circuit breaker disconnection, energy storage branch input and active load partial input, and controls the circuit breaker to close, and the wind power generator to start operating; a reactive power of an output end of the energy storage branch is taken as an instruction to control an output power of the energy storage branch, the stator voltage of the wind power generator starts to synchronize with the external voltage of a fan, and a preset grid connection condition is reached; the wind power generator climbs to output an active power according to a given power, and during the fan active climbing, the active load is gradually input. The fan and energy storage power are controlled, and when a starting inductive load during networking is insufficient, the problem of over-voltage caused by long cables can be avoided, which helps the system to operate stably.

Description

一种离网型风储荷发电***的控制调试方法A control and debugging method for off-grid wind load storage power generation system
相关申请的交叉引用Cross-references to related applications
本申请基于申请号为202210754819.1、申请日为2022年06月30日、申请名称为“一种离网型风储荷发电***及控制调试方法”的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。This application is based on the Chinese patent application with application number 202210754819.1, application date is June 30, 2022, and the application name is "An off-grid wind load storage power generation system and control and debugging method", and requires that the Chinese patent application Priority, the entire content of this Chinese patent application is hereby incorporated by reference into this application.
技术领域Technical field
本申请涉及但不限于风力发电与储能技术领域，尤其涉及一种离网型风储荷发电***的控制调试方法。This application relates to but is not limited to the technical fields of wind power generation and energy storage, and in particular, to a control and debugging method for an off-grid wind load storage power generation system.
背景技术Background technique
近年来，随着全球能源短缺和传统发电引起的环境问题越来越突出，风力发电以其成熟的技术和商业化潜力得到了迅速发展。离网型风力发电***可以在无大电网支撑的情况下独立运行，为其周边供电，对缓解电力供应紧张具有重要意义。然而，风力发电具有波动性和随机性，风速波动会引起风电机组输出功率的相应波动，因而风力发电不能提供持续稳定的功率，发电稳定性较差，并由此引发风电功率、输出电压、频率波动等一系列问题，甚至威胁***的稳定和安全运行。在离网型风力发电***中，由于缺乏大电网的有效支撑，上述问题将显得更为突出。储能***控制灵活、响应快速，可对风电功率波动进行平抑，且对***的电压频率提供有效的支撑。所以配置合理的储能可以提高***的稳定性。In recent years, as global energy shortages and environmental problems caused by traditional power generation have become increasingly prominent, wind power has developed rapidly with its mature technology and commercialization potential. Off-grid wind power generation systems can operate independently without the support of a large power grid to supply power to their surroundings, which is of great significance to alleviating power supply constraints. However, wind power generation is volatile and random. Wind speed fluctuations will cause corresponding fluctuations in the output power of wind turbines. Therefore, wind power generation cannot provide sustained and stable power, and the power generation stability is poor, which will cause wind power power, output voltage, frequency, etc. A series of problems such as fluctuations may even threaten the stability and safe operation of the system. In off-grid wind power generation systems, the above problems will become more prominent due to the lack of effective support from large power grids. The energy storage system has flexible control and fast response, which can smooth wind power power fluctuations and provide effective support for the voltage frequency of the system. Therefore, properly configured energy storage can improve the stability of the system.
目前对风力发电的研究大多是并网型，对离网型风力发电的研究较少。针对离网型风力发电的研究大多是并网运行的风力发电***由于某些原因转入孤网运行，未考虑风力发电***黑启动以及离网型风储荷***动态组网运行时存在的问题。离网型风储荷***动态组网装置中，风机侧与高压母线间存在远距离电力电缆，无功负荷的缺乏容易使得储能吸收的无功功率较多，电压源型储能的无功电压下垂控制会使储能输出电压过高，从而导致风机端的过电压，***运行出现问题。At present, most of the research on wind power generation is on the grid-connected type, and there is less research on off-grid wind power generation. Most of the research on off-grid wind power generation is that the grid-connected wind power generation system switches to isolated grid operation for some reasons, and does not consider the problems existing in the black start of the wind power generation system and the dynamic network operation of the off-grid wind load storage system. . In the dynamic networking device of the off-grid wind load storage system, there are long-distance power cables between the wind turbine side and the high-voltage busbar. The lack of reactive loads easily causes the energy storage to absorb more reactive power. The reactive power of the voltage source energy storage is Voltage droop control will cause the energy storage output voltage to be too high, resulting in overvoltage at the wind turbine end and system operation problems.
发明内容Contents of the invention
本申请实施例的目的在于提供一种离网型风储荷发电***的控制调试方法，以解决现有离网型风储荷***由于远距离电力电缆的存在，容易使风机端过电压，造成***运行不稳定的技术问题。The purpose of the embodiments of this application is to provide a control and debugging method for an off-grid wind load storage power generation system to solve the problem that the existing off-grid wind load storage system is prone to overvoltage at the wind turbine end due to the existence of long-distance power cables, causing Technical problems causing unstable system operation.
本申请实施例提供一种离网型风储荷发电***，包括：风力发电支路、储能支路、有功负荷和断路器K2；The embodiment of the present application provides an off-grid wind load storage power generation system, including: a wind power generation branch, an energy storage branch, an active load and a circuit breaker K2;
所述风力发电支路和断路器K2串联后与储能支路和有功负荷并联，然后接入高压母线200；所述风力发电支路包括风力发电机。The wind power generation branch and circuit breaker K2 are connected in series and then connected in parallel with the energy storage branch and active load, and then connected to the high-voltage bus 200; the wind power generation branch includes a wind generator.
在一些实施例中，所述风力发电支路还包括断路器K1、变流器、箱式变压器T1和风机并网电缆； In some embodiments, the wind power generation branch also includes a circuit breaker K1, a converter, a box transformer T1 and a wind turbine grid-connected cable;
所述断路器K1和变流器并联构成并联支路；The circuit breaker K1 and the converter are connected in parallel to form a parallel branch;
所述风力发电机的输出端通过并联支路与箱式变压器T1的低压侧连接；所述箱式变压器T1的高压侧通过风机并网电缆与断路器K2连接。The output end of the wind turbine is connected to the low-voltage side of the box-type transformer T1 through a parallel branch; the high-voltage side of the box-type transformer T1 is connected to the circuit breaker K2 through the wind turbine grid connection cable.
在一些实施例中，所述储能支路包括电压源型储能***300、电流源型储能***400和箱式变压器T2；In some embodiments, the energy storage branch includes a voltage source energy storage system 300, a current source energy storage system 400, and a box-type transformer T2;
所述电压源型储能***和电流源型储能***并联并通过箱式变压器T2连接高压母线。The voltage source energy storage system and the current source energy storage system are connected in parallel and connected to the high-voltage bus through the box-type transformer T2.
在一些实施例中，所述电压源型储能***包括若干台并联的电压源型储能装置；电流源型储能***包括若干台并联的电流源型储能装置。In some embodiments, the voltage source energy storage system includes several voltage source energy storage devices connected in parallel; the current source energy storage system includes several current source energy storage devices connected in parallel.
在一些实施例中，所述电压源型储能***采用虚拟同步控制模式。In some embodiments, the voltage source energy storage system adopts a virtual synchronous control mode.
在一些实施例中，所述电流源型储能***采用PQ控制模式。In some embodiments, the current source energy storage system adopts PQ control mode.
在一些实施例中，所述风力发电机为双馈异步风力发电机。In some embodiments, the wind turbine is a doubly fed asynchronous wind turbine.
在一些实施例中，还包括风储荷协调控制装置；所述风储荷协调控制装置，用于采集箱式变压器T2低压侧的电压u0和电流i0；对集箱式变压器T2低压侧的电压u0和电流i0进行解耦并计算出集箱式变压器T2低压侧的发出的无功功率QA；对电流源型储能***进行控制，设置电流源型储能***的无功功率参考值为变压器T2低压侧无功功率的相反数，形成闭环控制。In some embodiments, it also includes a wind and load storage coordination control device; the wind and load storage coordination control device is used to collect the voltage u 0 and current i 0 on the low-voltage side of the box-type transformer T2; and Decouple the voltage u 0 and current i 0 and calculate the reactive power Q A generated by the low-voltage side of the header transformer T2; control the current source energy storage system and set the reactive power of the current source energy storage system The power reference value is the inverse of the reactive power at the low-voltage side of transformer T2, forming a closed-loop control.
基于同一发明构思，本申请实施例还提供一种对离网型风储荷发电***控制调试方法，所述离网型风储荷发电***为本申请实施例提供的一种离网型风储荷发电***，所述控制调试方法包括：Based on the same inventive concept, embodiments of the present application also provide a method for controlling and debugging an off-grid wind load storage power generation system. The off-grid wind load storage power generation system is an off-grid wind storage power generation system provided by embodiments of the present application. Charge generation system, the control and debugging method includes:
控制断路器K2断开，储能支路投入、并将有功负荷中一部分投入，此时构成离网型储荷***；The circuit breaker K2 is controlled to open, the energy storage branch is put in, and part of the active load is put in. At this time, an off-grid load storage system is formed;
控制断路器K2闭合，风力发电机开始工作；以储能支路输出端无功功率为指令控制所述储能支路的输出功率，风力发电机的定子电压与风机外部电压开始同步，并达到预设并网条件，此时构成离网型风储荷***；The circuit breaker K2 is controlled to close and the wind turbine starts to work; the output power of the energy storage branch is controlled with the reactive power at the output end of the energy storage branch as a command. The stator voltage of the wind turbine begins to synchronize with the external voltage of the wind turbine, and reaches The grid-connected conditions are preset, and an off-grid wind load storage system is formed at this time;
风力发电机按给定功率爬坡输出有功功率，在风机有功爬坡过程中，逐步投入有功负荷。The wind turbine outputs active power according to a given power ramp. During the active power ramping process of the wind turbine, the active load is gradually put into it.
在一些实施例中，所述控制断路器K2断开，储能支路投入、并将有功负荷中一部分投入，此时构成离网型储荷***包括：In some embodiments, the control circuit breaker K2 is opened, the energy storage branch is put in, and a part of the active load is put in. At this time, the off-grid load storage system includes:
控制断路器K2断开，同时控制断路器K1断开；Control the circuit breaker K2 to open, and control the circuit breaker K1 to open at the same time;
启动电压源型储能***和电流源型储能***，将有功负荷中的投入，构成离网型储荷***。Start the voltage source energy storage system and current source energy storage system to convert the active load into input to form an off-grid load storage system.
在一些实施例中，所述启动电压源型储能***和电流源型储能***，将有功负荷中的投入，构成离网型储荷***步骤中，所述有功负荷小于或等于电压源型储能***总容量。In some embodiments, the starting voltage source energy storage system and the current source energy storage system convert the active load into In the step of constructing an off-grid load storage system, the active load Less than or equal to the total capacity of the voltage source energy storage system.
在一些实施例中，所述启动电压源型储能***和电流源型储能***，将有功负荷中的投入，构成离网型储荷***步骤中，所述电压源型储能***输出有功功率等于投入的有功负荷 In some embodiments, the starting voltage source energy storage system and the current source energy storage system convert the active load into In the step of constructing an off-grid load storage system, the output active power of the voltage source energy storage system is equal to the input active load.
在一些实施例中，所述控制断路器K2闭合，风力发电机开始工作；以储能支路输出端无功功率为指令控制所述储能支路的输出功率，风力发电机的定子电压与风机外部电压开始同步，并达到预设并网条件，此时构成离网型风储荷***包括：In some embodiments, the control circuit breaker K2 is closed and the wind turbine starts to work; the reactive power at the output end of the energy storage branch is used as a command to control the output power of the energy storage branch, and the stator voltage of the wind turbine is equal to The external voltage of the wind turbine begins to synchronize and reaches the preset grid connection conditions. At this time, the off-grid wind load storage system includes:
控制断路器K2闭合，完成风机侧线路接入； Control the circuit breaker K2 to close, completing the fan side line connection;
测量箱式变压器T2低压侧无功功率，其相反数作为电流源型储能***无功输入指令；Measure the reactive power at the low-voltage side of box-type transformer T2, and its inverse is used as the reactive power input command of the current source energy storage system;
风力发电机的定子电压与风机外部电压开始同步，达到预设并网条件后，闭合断路器K1，构成离网型风储荷***。The stator voltage of the wind turbine starts to synchronize with the external voltage of the wind turbine. After reaching the preset grid connection conditions, the circuit breaker K1 is closed to form an off-grid wind load storage system.
在一些实施例中，所述预设并网条件具体为：风力发电机的定子电压与外部电压频率、相位、幅值完全一致。In some embodiments, the preset grid connection condition is specifically: the stator voltage of the wind turbine is completely consistent with the frequency, phase, and amplitude of the external voltage.
在一些实施例中，所述测量箱式变压器T2低压侧无功功率，其相反数作为电流源型储能***无功输入指令的步骤，具体包括：测量箱式变压器T2低压侧无功功率；设置电流源型储能***的无功功率参考值为变压器T2低压侧无功功率的相反数，形成闭环控制。In some embodiments, the step of measuring the reactive power at the low-voltage side of the box-type transformer T2 and using its inverse as the reactive power input command of the current source energy storage system specifically includes: measuring the reactive power at the low-voltage side of the box-type transformer T2; The reactive power reference value of the current source energy storage system is set to the opposite number of the reactive power on the low-voltage side of the transformer T2 to form a closed-loop control.
在一些实施例中，所述在风机有功爬坡过程中，逐步投入有功负荷的步骤，具体包括：In some embodiments, the step of gradually putting in active load during the active power ramping process of the wind turbine specifically includes:
t1时刻风力发电机功率开始爬坡，此时动态分次投入有功负荷；t2时刻风力发电机输出功率稳定后，风力发电机输出的有功功率和无功功率分别稳定至设定值；此时投入的有功负荷与风力发电机的设定值相同。At time t 1 , the power of the wind turbine begins to climb, and the active load is dynamically put into operation in batches at this time; after the output power of the wind turbine stabilizes at time t 2 , the active power and reactive power output by the wind turbine stabilize to the set values respectively; this The active load input at the time is the same as the set value of the wind turbine.
在一些实施例中，所述在风机有功爬坡过程中，逐步投入有功负荷的步骤中，t1时刻开始，不断减小电流源型储能***的无功功率，直到t2时刻完全切出。In some embodiments, in the step of gradually putting the active load into operation during the active power ramping process of the wind turbine, starting from time t1 , the reactive power of the current source energy storage system is continuously reduced until time t2 is completely switched out. .
本申请实施例具有以下有益效果：The embodiments of this application have the following beneficial effects:
本申请实施例提供一种离网型风储荷发电***的控制调试方法，采用的多种类型的混合储能***，可以实现电压、频率以及有功功率的准确输出；避免了只采用电压源型储能由于长电缆导致的无功偏差引起的过电压问题，最后由于采用闭环控制，可在不同线路上实现风机的黑启动，这对于离网型远端风机的启动以及***稳定运行具有重大意义。The embodiment of the present application provides a control and debugging method for an off-grid wind load storage power generation system. The multiple types of hybrid energy storage systems used can achieve accurate output of voltage, frequency and active power; avoiding the need to only use a voltage source type Energy storage causes overvoltage problems caused by reactive power deviation caused by long cables. Finally, due to the use of closed-loop control, black starts of fans can be achieved on different lines, which is of great significance for the start-up of off-grid remote fans and the stable operation of the system. .
本申请实施例先由储能黑启动建立稳定的电压、频率后，再启动风机，并按功率协调控制调试方法对孤网运行的风机、储能、负荷进行设备动态投切及实时功率优化控制。本申请实施例通过控制风机、储能的功率，当组网过程中启动感性负荷不足时，可以避免长电缆引起的过电压问题，有利于***稳定运行。The embodiment of this application first establishes stable voltage and frequency through energy storage black start, then starts the wind turbine, and performs dynamic equipment switching and real-time power optimization control on the wind turbine, energy storage, and load operating in the isolated grid according to the power coordinated control debugging method. . By controlling the power of fans and energy storage, the embodiment of this application can avoid overvoltage problems caused by long cables when the inductive load is insufficient during the networking process, which is conducive to stable operation of the system.
通过本申请实施例控制调试方法可以脱离大电网的支撑，实现对周边负荷供电，十分适用于牧区、林区、海岛等大电网无法有效覆盖的地区，对缓解电力供应紧张具有重要意义。Through the control and debugging method of the embodiment of the present application, the control and debugging method can be separated from the support of the large power grid to realize power supply to surrounding loads. It is very suitable for areas such as pastoral areas, forest areas, and islands that cannot be effectively covered by large power grids, and is of great significance for alleviating the tight power supply.
附图说明Description of drawings
为了更清楚地说明本申请具体实施方式中的技术方案，下面将对具体实施方式描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施方式，构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定，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。In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the drawings needed to be used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. , the description and drawings that constitute a part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. For those of ordinary skill in the art Generally speaking, other drawings can also be obtained based on these drawings without exerting creative work.
图1为本申请实施例提供的一种离网型风储荷发电***的结构示意图；Figure 1 is a schematic structural diagram of an off-grid wind load storage power generation system provided by an embodiment of the present application;
图2为本申请实施例提供的风储荷协调控制装置的结构示意图；Figure 2 is a schematic structural diagram of the wind load storage coordination control device provided by the embodiment of the present application;
图3为申请实施例提供的离网型风储荷***功率协调控制示意图；Figure 3 is a schematic diagram of the power coordination control of the off-grid wind load storage system provided in the application embodiment;
图4为申请实施例提供的一种离网型风储荷发电***各单元功率值协调控制图；Figure 4 is a coordination control diagram of the power values of each unit of an off-grid wind load storage power generation system provided by the application embodiment;
图5为申请实施例提供的电压源型储能自动响应功率示意图。 Figure 5 is a schematic diagram of the voltage source type energy storage automatic response power provided in the application embodiment.
具体实施方式Detailed ways
下面将参考附图并结合实施例来详细说明本申请。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other.
以下详细说明均是示例性的说明，旨在对本申请提供在一些实施例中详细说明。除非另有指明，本申请所采用的所有技术术语与本申请所属领域的一般技术人员的通常理解的含义相同。本申请所使用的术语仅是为了描述具体实施方式，而并非意图限制根据本申请的示例性实施方式。The following detailed description is an exemplary description and is intended to provide detailed explanation of some embodiments of the present application. Unless otherwise specified, all technical terms used in this application have the same meanings as commonly understood by those of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments according to this application.
由于电压源型储能采用传统的虚拟同步控制技术，当风储***独立运行时，存在长电缆过电压、负荷波动以及风机功率爬坡等情况。由于电压源型储能使用了有功-频率控制以及无功-电压控制，频率和电压会偏离额定值，甚至发生越限。为解决这个问题，本申请根据***的负荷与线路阻抗，设置风机的有功功率、无功功率。在风机有功爬坡的过程中投切有功负荷，并通过电流源型储能吸收容性线路产生的无功，并补偿无功负荷，来稳定***频率和电压。Since voltage source energy storage uses traditional virtual synchronous control technology, when the wind storage system operates independently, there are situations such as long cable overvoltage, load fluctuations, and wind turbine power ramping. Since voltage source energy storage uses active power-frequency control and reactive power-voltage control, the frequency and voltage will deviate from the rated values or even exceed the limits. In order to solve this problem, this application sets the active power and reactive power of the fan according to the system load and line impedance. During the active power climbing process of the wind turbine, the active load is switched on and off, and the reactive power generated by the capacitive line is absorbed through the current source energy storage, and the reactive load is compensated to stabilize the system frequency and voltage.
实施例1Example 1
请参阅图1所示，本申请实施例提供一种离网型风储荷发电***，包括：风力发电支路、储能支路、有功负荷和断路器K2；风力发电支路包括风力发电机100；储能支路包括多种类型的混合储能***；风力发电支路和断路器K2串联后与储能支路和有功负荷并联，然后接入高压母线200。Please refer to Figure 1. This embodiment of the present application provides an off-grid wind load storage power generation system, including: a wind power generation branch, an energy storage branch, an active load and a circuit breaker K2; the wind power generation branch includes a wind turbine 100; the energy storage branch includes various types of hybrid energy storage systems; the wind power generation branch and circuit breaker K2 are connected in series and then connected in parallel with the energy storage branch and active load, and then connected to the high-voltage bus 200.
混合储能***包括电压源型储能***300和电流源型储能***400。The hybrid energy storage system includes a voltage source energy storage system 300 and a current source energy storage system 400 .
在一些实施例中，风力发电支路还包括断路器K1、变流器101、箱式变压器T1和风机并网电缆500；所述断路器K1和变流器101并联构成并联支路。In some embodiments, the wind power generation branch also includes a circuit breaker K1, a converter 101, a box transformer T1, and a wind turbine grid-connected cable 500; the circuit breaker K1 and the converter 101 are connected in parallel to form a parallel branch.
在一些实施例中，储能支路还包括箱式变压器T2。电压源型储能***300和电流源型储能***400并联并通过箱式变压器T2连接高压母线200。In some embodiments, the energy storage branch also includes a box-type transformer T2. The voltage source energy storage system 300 and the current source energy storage system 400 are connected in parallel and connected to the high-voltage bus 200 through the box-type transformer T2.
电压源型储能***300由m台电压源型储能装置301并联而成；电流源型储能***400由n台电流源型储能装置401并联而成。m和n均为大于等于1的正整数。m台电压源型储能装置301构成电压源型储能***300，n台电流源型储能装置401构成电流源型储能***400。m台电压源型储能装置301和n台电流源型储能装置401的输出端连接箱式变压器T2的低压侧，接箱式变压器T2的高压侧连接高压母线200。电压源型储能***300采用虚拟同步控制式，分为有功频率控制和无功电压控制，分别模拟同步发电机的调速和励磁***。电流源型储能***400采用PQ控制模式，实质是将有功功率和无功功率解耦后分别控制。The voltage source energy storage system 300 is composed of m voltage source energy storage devices 301 connected in parallel; the current source energy storage system 400 is composed of n current source energy storage devices 401 connected in parallel. Both m and n are positive integers greater than or equal to 1. m voltage source energy storage devices 301 constitute a voltage source energy storage system 300, and n current source energy storage devices 401 constitute a current source energy storage system 400. The output terminals of m voltage source energy storage devices 301 and n current source energy storage devices 401 are connected to the low-voltage side of the box-type transformer T2, and the high-voltage side of the box-type transformer T2 is connected to the high-voltage bus 200. The voltage source energy storage system 300 adopts a virtual synchronous control type, which is divided into active frequency control and reactive voltage control, which simulate the speed regulation and excitation system of the synchronous generator respectively. The current source energy storage system 400 adopts the PQ control mode, which essentially decouples the active power and reactive power and controls them separately.
在一些实施例中，有功负荷P1连接高压母线200。In some embodiments, the active load P1 is connected to the high voltage bus 200 .
本申请实施例的电压源型与电流源型储能多机并联的混合储能***，不仅可以通过电压源型储能实现电压、频率的稳定以及有功功率的准确输出；同时由于变压器、长电缆的存在，电流源型储能可以提供无功闭环支撑，避免了只采用电压源型储能由于长电缆导致的无功偏差引起的过电压问题。The hybrid energy storage system in which multiple machines of voltage source type and current source type energy storage are connected in parallel in the embodiment of the present application can not only achieve the stability of voltage and frequency and the accurate output of active power through voltage source type energy storage; at the same time, due to the use of transformers and long cables The existence of current source energy storage can provide reactive power closed-loop support, avoiding overvoltage problems caused by reactive power deviation caused by long cables when only voltage source energy storage is used.
在一些实施例中，风力发电机100采用双馈异步风力发电机。In some embodiments, wind turbine 100 employs a doubly-fed asynchronous wind turbine.
请参阅图2所示，本申请实施例提供一种离网型风储荷发电***，包括风储荷协调控制装置20；所述风储荷协调控制装置包括数据采集模块201、功率计算模块202、执行模块203和通讯管理模块204。Referring to Figure 2, an embodiment of the present application provides an off-grid wind load storage power generation system, including a wind load storage coordination control device 20; the wind load storage coordination control device includes a data acquisition module 201 and a power calculation module 202 , execution module 203 and communication management module 204.
所述数据采集模块201，用于采集箱式变压器T2低压侧的电压u0和电流i0，以及电流源型储能***400和风力发电机100的运行信息。功率计算模块202，用于对集箱式 变压器T2低压侧的电压u0和电流i0进行解耦，并计算出集箱式变压器T2低压侧的发出的无功功率QA。执行模块203，用于通过通讯管理模块204，对电流源型储能***400、有功负荷P1和风力发电机100进行功率控制。对电流源型储能***400进行控制时，设置电流源型储能***400的无功功率参考值有功功率参考值形成闭环控制。The data acquisition module 201 is used to collect the voltage u 0 and current i 0 on the low-voltage side of the box-type transformer T2, as well as the operation information of the current source energy storage system 400 and the wind turbine 100. Power calculation module 202, used to calculate the box type The voltage u 0 and current i 0 at the low-voltage side of the transformer T2 are decoupled, and the reactive power Q A generated by the low-voltage side of the header transformer T2 is calculated. The execution module 203 is used to perform power control on the current source energy storage system 400, the active load P1 and the wind turbine 100 through the communication management module 204. When controlling the current source energy storage system 400, set the reactive power reference value of the current source energy storage system 400. Active power reference value Form closed loop control.
本申请实施例充分发挥了不同控制类型储能的优势，并形成互补。其中电压源型储能可建立稳定的电压、频率，提供***自启动能力，并且自动响应风机、有功负荷的波动。电流源型储能可以对***无功进行及时补偿。在启动过程中，风储荷协调控制装置还对有功负荷的功率进行控制，使得电压源型储能输出有功维持在0附近。The embodiments of this application give full play to the advantages of different control types of energy storage and form complementarities. Among them, voltage source energy storage can establish stable voltage and frequency, provide the system with self-starting capability, and automatically respond to fluctuations in fans and active loads. Current source energy storage can compensate the system's reactive power in time. During the start-up process, the wind-load storage coordination control device also controls the power of the active load so that the output active power of the voltage source type energy storage is maintained near 0.
实施例2Example 2
本申请实施例还提供一种离网型风储荷发电***的控制调试方法，控制调试方法通过步骤S1至S3实现：The embodiment of the present application also provides a control and debugging method for an off-grid wind load storage power generation system. The control and debugging method is implemented through steps S1 to S3:
S1、控制断路器K2断开，储能支路投入、并将有功负荷中一部分投入，此时构成离网型储荷***。S1, the control circuit breaker K2 is opened, the energy storage branch is put in, and part of the active load is put in. At this time, an off-grid load storage system is formed.
S2、控制断路器K2闭合，风力发电机100开始工作；以储能支路输出端无功功率为指令控制所述储能支路的输出功率，风力发电机100的定子电压与风机外部电压开始同步，并达到预设并网条件，此时构成离网型风储荷***。S2. Control the circuit breaker K2 to close, and the wind turbine 100 starts to work; use the reactive power at the output end of the energy storage branch as a command to control the output power of the energy storage branch, and the stator voltage of the wind turbine 100 starts to match the external voltage of the wind turbine. Synchronize and reach the preset grid connection conditions, at this time, an off-grid wind load storage system is formed.
S3、风力发电机100按给定功率爬坡输出有功功率，在风机有功爬坡过程中，逐步投入有功负荷。S3. The wind turbine 100 outputs active power according to a given power ramp, and gradually puts in the active load during the active power ramping process of the wind turbine.
在一些实施例中，步骤S1可以包括：In some embodiments, step S1 may include:
风储荷协调控制装置控制断路器K2断开，启动电压源型储能***300和电流源型储能***400，投入有功负荷由混合储能与有功负荷构成离网型储荷***。其中，设定电压源型储能***300输出有功功率等于投入的有功负荷电流源型储能***400输出有功功率为0。The wind load storage coordination control device controls the circuit breaker K2 to open, starts the voltage source energy storage system 300 and the current source energy storage system 400, and puts in the active load An off-grid load storage system is composed of mixed energy storage and active loads. Among them, the output active power of the voltage source energy storage system 300 is set to be equal to the input active load. The current source energy storage system 400 outputs active power of 0.
在一些实施例中，步骤S2可以包括：In some embodiments, step S2 may include:
t0时刻，当步骤S1所述的离网型储荷***输出稳定的电压、频率后风储荷协调控制装置控制断路器K2闭合，完成风机侧线路接入。At time t 0 , when the off-grid load storage system described in step S1 outputs stable voltage and frequency, the wind load storage coordination control device controls the circuit breaker K2 to close, completing the wind turbine side line connection.
测量箱式变压器T2低压侧A处的无功功率，其相反数作为电流源型储能***400无功输入指令，以平衡风机并网电缆500、箱式变压器T1、箱式变压器T2的产生的无功功率。The reactive power at the low-voltage side A of the box-type transformer T2 is measured, and its opposite is used as the reactive power input command of the current source energy storage system 400 to balance the power generated by the wind turbine grid-connected cable 500, box-type transformer T1, and box-type transformer T2. Reactive power.
风力发电机100的定子电压与风机外部电压开始同步，当风机定子电压与外部电压频率、相位、幅值完全一致时(t1时刻)，风储荷协调控制装置控制风机并网断路器K1闭合，风力发电机100完全接入，构成离网型风储荷***。The stator voltage of the wind turbine 100 begins to synchronize with the external voltage of the wind turbine. When the frequency, phase, and amplitude of the wind turbine stator voltage are completely consistent with the external voltage (time t1 ), the wind load storage coordination control device controls the wind turbine grid-connected circuit breaker K1 to close , the wind turbine 100 is fully connected to form an off-grid wind load storage system.
在一些实施例中，步骤S3可以包括：In some embodiments, step S3 may include:
风力发电机100按给定功率爬坡输出有功功率，在风机有功爬坡过程中，逐步投入有功负荷。当风力发电机100功率输出稳定后，风、储、荷完成动态组网。此***有较强的暂态稳定性，可响应风机出力波动与负荷投切。The wind turbine 100 outputs active power according to a given power ramp, and during the active power ramping process of the wind turbine, the active load is gradually put into the wind turbine. When the power output of the wind turbine 100 is stable, the wind, storage, and load complete the dynamic networking. This system has strong transient stability and can respond to fan output fluctuations and load switching.
本申请实施例提出了一种离网型风储荷发电***的控制调试方法，充分发挥了电压源型与电流源型储能的优势。其中电压源型储能可建立稳定的***电压、频率，提供***自启动能力，并且快速响应风机、有功负荷的有功功率波动。针对传统的虚拟同步控制技术导致离网***频率和电压会偏离额定值的问题，本申请实施例采用电流源型储能提供无功补偿，使***电压维持在额定值，同时控制有功负荷的动态投切，降低电压源 型储能的有功功率调节压力，使***频率维持在额定值。The embodiment of this application proposes a control and debugging method for an off-grid wind load storage power generation system, which fully utilizes the advantages of voltage source type and current source type energy storage. Among them, voltage source energy storage can establish stable system voltage and frequency, provide system self-starting capability, and quickly respond to active power fluctuations of wind turbines and active loads. In view of the problem that traditional virtual synchronous control technology causes the frequency and voltage of the off-grid system to deviate from the rated value, the embodiment of this application uses current source energy storage to provide reactive power compensation to maintain the system voltage at the rated value while controlling the dynamics of the active load. switching, reducing the voltage source The active power of the type energy storage regulates the pressure to maintain the system frequency at the rated value.
在一例具体实施方式中，请参阅图3所示：当闭合断路器K2后，通过测量箱式变压器T2低压侧A处电压和电流u0、i0并解耦，计算出A处发出的无功功率QA。电流源型储能***400的无功功率参考值有功功率参考值形成闭环控制。利用电流源型储能***400吸收风机侧与负荷侧发出的感性无功，电压源型储能***300吸收的感性无功接近于0，既可以使储能电压输出恢复正常，又可以及时响应无功负荷的变化，有利于***黑启动以及平稳运行。黑启动开始(t0)前，测得QA稳定后的瞬时值Q0，风机稳定后无功参考值有功参考值为此时利用风电吸收感性无功。风力发电机100有功、无功功率指令如公式(1)和(2)所示：

In an example of a specific implementation, please refer to Figure 3: After closing the circuit breaker K2, by measuring the voltage and current u 0 and i 0 at the low-voltage side A of the box-type transformer T2 and decoupling them, the wireless power emitted at A is calculated. Work power Q A . Reactive power reference value of current source energy storage system 400 Active power reference value Form closed loop control. The current source energy storage system 400 is used to absorb the inductive reactive power emitted from the fan side and the load side. The inductive reactive power absorbed by the voltage source energy storage system 300 is close to 0, which can not only restore the energy storage voltage output to normal, but also respond in time. Changes in reactive load are conducive to black start and smooth operation of the system. Before the black start starts (t 0 ), measure the instantaneous value Q 0 after Q A stabilizes, and the reactive power reference value after the fan stabilizes The active reference value is At this time, wind power is used to absorb inductive reactive power. The active and reactive power instructions of the wind turbine 100 are as shown in formulas (1) and (2):

其中，和分别为风力发电机100有功和无功的爬坡速率。in, and are the ramping rates of active and reactive power of wind turbine 100 respectively.
离网型风储荷发电***的控制调试方法控制的风储荷功率如图4所示，基于前述实施例，t0时刻闭合断路器K2，t1时刻风力发电机100功率开始爬坡，此时动态分次投入有功负荷，每次投入共n次，t2输出功率稳定后，风力发电机100输出的有功功率和无功功率分别稳定至设定值和***黑启动完成。此时投入的有功负荷为其中，t1时刻开始，不断减小电流源型储能***400的无功功率，直到t2时刻完全切出。t1至t2不断减小电流源型储能的无功，本申请实施例考虑的是没有无功备用负荷的情况，图1上标出的无功负荷P2，是***黑启动完成后会产生的无功负荷，本申请实施例可以对电流源型储能无功功率的控制，在***稳定运行后继续保持无功的平衡，以及电压的稳定。Q1是***稳定后产生的容性无功负荷，t3是这个负荷产生的时间；t4表示该容性负荷切出。The wind storage power controlled by the control and debugging method of the off-grid wind load storage power generation system is shown in Figure 4. Based on the previous embodiment, the circuit breaker K2 is closed at time t 0 , and the power of the wind turbine 100 starts to climb at time t 1. This When the active load is put in dynamically in batches, each time A total of n times, after the output power of t 2 stabilizes, the active power and reactive power output by the wind turbine 100 stabilize to the set values respectively. and The system black boot is completed. The active load invested at this time is in, Starting from time t1 , the reactive power of the current source energy storage system 400 is continuously reduced until it is completely cut out at time t2 . From t 1 to t 2 , the reactive power of the current source type energy storage is continuously reduced. The embodiment of this application considers the situation where there is no reactive power backup load. The reactive power load P2 marked on Figure 1 is what will happen after the system black start is completed. The generated reactive load, the embodiment of the present application can control the reactive power of the current source type energy storage, and continue to maintain the balance of reactive power and the stability of voltage after the system operates stably. Q1 is the capacitive reactive load generated after the system stabilizes, t3 is the time when this load is generated; t4 indicates that the capacitive load is cut out.
电压源型储能***300响应功率如图5所示，根据本申请实施例提供的控制调试方法，其无功输出为0，有功输出在风力发电机100爬坡后，可以维持在0附近。避免了***电压、频率偏移过大的问题。The response power of the voltage source energy storage system 300 is shown in Figure 5. According to the control and debugging method provided by the embodiment of the present application, its reactive power output is 0, and the active power output can be maintained near 0 after the wind turbine 100 climbs the slope. This avoids the problem of excessive system voltage and frequency deviation.
采用上述技术方案，通过调节储能与风机的功率，并对负荷进行动态投切，降低了电压源型储能输出的无功与有功功率，使***的频率电压维持在额定值；当风机启动后储能***可以自动平滑风电场出力波动，同时也可对负荷出力波动进行平抑。Using the above technical solution, by adjusting the power of the energy storage and wind turbines and dynamically switching the load, the reactive and active power output by the voltage source energy storage is reduced, so that the frequency and voltage of the system are maintained at the rated value; when the wind turbine starts The rear energy storage system can automatically smooth the wind farm output fluctuations and also smooth the load output fluctuations.
本申请实施例提供的风储荷***的控制调试方法，在离网运行情况下，依据不同运行条件，风力发电***、储能***以及负荷三者间开展的差异化动态组网控制。先由储能黑启动建立稳定的电压、频率后，再启动风机，并按策略对孤网运行的风机、储能的功率进行实时优化、负荷进行动态投切控制，以实现整个***供用电平衡、运行稳定可 靠。The control and debugging method of the wind load storage system provided by the embodiments of this application enables differentiated dynamic network control among the wind power generation system, energy storage system and load under off-grid operation and according to different operating conditions. First, the energy storage black start is used to establish stable voltage and frequency, and then the wind turbines are started. The power of wind turbines and energy storage operating in the isolated grid is optimized in real time according to the strategy, and the load is dynamically switched and controlled to realize the power supply and consumption of the entire system. Balanced and stable operation Depend on.
本申请实施例先逐步建立离网型风储荷***，再对风机、储能、负荷功率进行控制，可以解决在风储荷***建立与运行过程中，长电缆过电压、负荷波动、风机功率爬坡等情况对***电压与频率偏移的影响。The embodiment of this application first gradually establishes an off-grid wind load storage system, and then controls the wind turbine, energy storage, and load power, which can solve the problems of long cable overvoltage, load fluctuation, and fan power during the establishment and operation of the wind load storage system. The impact of ramping and other conditions on system voltage and frequency offset.
最后应该说明的是：以上实施例仅用以说明本申请的技术方案而非对其限制，结合上述实施例对本申请进行了详细说明，所属领域的普通技术人员应当理解到：本领域技术人员依然可以对本申请的具体实施方式进行修改或者等同替换，但这些修改或变更均在申请待批的权利要求保护范围之中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application but not to limit it. The present application is described in detail in combination with the above embodiments. Those skilled in the art should understand that: those skilled in the art still The specific implementation modes of the present application may be modified or equivalently substituted, but these modifications or changes are within the protection scope of the pending claims.
本领域内的技术人员应明白，本申请的实施例可提供为方法、***、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will understand that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
本申请是参照根据本申请实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.
最后应当说明的是：以上实施例仅用以说明本申请的技术方案而非对其限制，尽管参照上述实施例对本申请进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本申请的具体实施方式进行修改或者等同替换，而未脱离本申请精神和范围的任何修改或者等同替换，其均应涵盖在本申请的权利要求保护范围之内。 Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present application can still be modified. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this application shall be covered by the scope of the claims of this application.

Claims (15)

  1. 一种离网型风储荷发电***的控制调试方法，所述离网型风储荷发电***包括：风力发电支路、储能支路、有功负荷和断路器K2；所述风力发电支路和断路器K2串联后与储能支路和有功负荷并联，然后接入高压母线(200)；所述风力发电支路包括风力发电机(100)；所述储能支路包括多种类型的混合储能***；A control and debugging method for an off-grid wind load storage power generation system. The off-grid wind load storage power generation system includes: a wind power generation branch, an energy storage branch, an active load and a circuit breaker K2; the wind power generation branch After being connected in series with circuit breaker K2, it is connected in parallel with the energy storage branch and active load, and then connected to the high-voltage bus (200); the wind power generation branch includes a wind turbine (100); the energy storage branch includes multiple types of Hybrid energy storage system;
    所述控制调试方法包括：The control and debugging methods include:
    控制断路器K2断开，储能支路投入、并将有功负荷中一部分投入，此时构成离网型储荷***；The circuit breaker K2 is controlled to open, the energy storage branch is put in, and part of the active load is put in. At this time, an off-grid load storage system is formed;
    控制断路器K2闭合，风力发电机(100)开始工作；以储能支路输出端无功功率为指令控制所述储能支路的输出功率，风力发电机(100)的定子电压与风机外部电压开始同步，并达到预设并网条件，此时构成离网型风储荷***；The circuit breaker K2 is controlled to close, and the wind turbine (100) starts to work; the reactive power at the output end of the energy storage branch is used as a command to control the output power of the energy storage branch. The stator voltage of the wind turbine (100) is consistent with the external voltage of the wind turbine. The voltage begins to synchronize and reaches the preset grid connection conditions, and an off-grid wind load storage system is formed at this time;
    风力发电机(100)按给定功率爬坡输出有功功率，在风机有功爬坡过程中，逐步投入有功负荷；The wind turbine (100) outputs active power according to a given power ramp, and during the active power ramping process of the wind turbine, the active load is gradually put into it;
    所述在风机有功爬坡过程中，逐步投入有功负荷的步骤，具体包括：The steps of gradually putting in active load during the active power climbing process of the wind turbine specifically include:
    t1时刻风力发电机(100)功率开始爬坡，此时动态分次投入有功负荷；t2时刻风力发电机(100)输出功率稳定后，风力发电机(100)输出的有功功率和无功功率分别稳定至设定值；此时投入的有功负荷与风力发电机(100)的设定值相同。At time t1, the power of the wind turbine (100) begins to climb, and at this time the active load is dynamically put into operation in batches; after the output power of the wind turbine (100) stabilizes at time t2, the active power and reactive power output by the wind turbine (100) are respectively Stable to the set value; the active load input at this time is the same as the set value of the wind turbine (100).
  2. 根据权利要求1所述的控制调试方法，所述控制断路器K2断开，储能支路投入、并将有功负荷中一部分投入，此时构成离网型储荷***包括：According to the control and debugging method of claim 1, the control circuit breaker K2 is disconnected, the energy storage branch is put in, and a part of the active load is put in. At this time, the off-grid load storage system is formed including:
    控制断路器K2断开，同时控制断路器K1断开；Control the circuit breaker K2 to open, and control the circuit breaker K1 to open at the same time;
    启动电压源型储能***(300)和电流源型储能***(400)，将有功负荷中的投入，构成离网型储荷***。Start the voltage source energy storage system (300) and current source energy storage system (400) to convert the active load into input to form an off-grid load storage system.
  3. 根据权利要求2所述的控制调试方法，所述启动电压源型储能***(300)和电流源型储能***(400)，将有功负荷中的投入，构成离网型储荷***步骤中，所述有功负荷小于或等于电压源型储能***(300)总容量。According to the control and debugging method of claim 2, the starting voltage source energy storage system (300) and the current source energy storage system (400) convert the active load into In the step of constructing an off-grid load storage system, the active load Less than or equal to the total capacity of the voltage source energy storage system (300).
  4. 根据权利要求2所述的控制调试方法，所述启动电压源型储能***(300)和电流源型储能***(400)，将有功负荷中的投入，构成离网型储荷***步骤中，所述电压源型储能***(300)输出有功功率等于投入的有功负荷 According to the control and debugging method of claim 2, the starting voltage source energy storage system (300) and the current source energy storage system (400) convert the active load into In the step of constructing an off-grid load storage system, the output active power of the voltage source energy storage system (300) is equal to the input active load.
  5. 根据权利要求1所述的控制调试方法，所述控制断路器K2闭合，风力发电机(100)开始工作；以储能支路输出端无功功率为指令控制所述储能支路的输出功率，风力发电机(100)的定子电压与风机外部电压开始同步，并达到预设并网条件，此时构成离网型风储荷***包括：According to the control and debugging method of claim 1, the control circuit breaker K2 is closed and the wind turbine (100) starts to work; the output power of the energy storage branch is controlled using the reactive power at the output end of the energy storage branch as a command. , the stator voltage of the wind turbine (100) begins to synchronize with the external voltage of the wind turbine, and reaches the preset grid connection condition. At this time, the off-grid wind load storage system is formed including:
    控制断路器K2闭合，完成风机侧线路接入；Control the circuit breaker K2 to close, completing the fan side line connection;
    测量箱式变压器T2低压侧无功功率，其相反数作为电流源型储能***(400)无功输入指令；Measure the reactive power at the low-voltage side of box-type transformer T2, and its inverse is used as the reactive power input command of the current source energy storage system (400);
    风力发电机(100)的定子电压与风机外部电压开始同步，达到预设并网条件后，闭合断路器K1，构成离网型风储荷***。The stator voltage of the wind turbine (100) begins to synchronize with the external voltage of the wind turbine. After reaching the preset grid connection conditions, the circuit breaker K1 is closed to form an off-grid wind load storage system.
  6. 根据权利要求5所述的控制调试方法，所述预设并网条件具体为：风力发电机(100)的定子电压与外部电压频率、相位、幅值完全一致。According to the control and debugging method of claim 5, the preset grid connection condition is specifically: the stator voltage of the wind turbine (100) is completely consistent with the frequency, phase, and amplitude of the external voltage.
  7. 根据权利要求5所述的控制调试方法，所述测量箱式变压器T2低压侧无功功率，其相反数作为电流源型储能***(400)无功输入指令的步骤，具体包括：测量箱式变压器T2低压侧无功功率；设置电流源型储能***(400)的无功功率参考值为变压器 T2低压侧无功功率的相反数，形成闭环控制。According to the control and debugging method according to claim 5, the step of measuring the reactive power of the low-voltage side of the box-type transformer T2, and its inverse is used as the reactive power input command of the current source energy storage system (400), specifically includes: measuring the box-type energy storage system (400). Reactive power at the low voltage side of transformer T2; set the reactive power reference value of the current source energy storage system (400) to the transformer The opposite number of the reactive power on the low-voltage side of T2 forms a closed-loop control.
  8. 根据权利要求1所述的控制调试方法，所述在风机有功爬坡过程中，逐步投入有功负荷的步骤中，t1时刻开始，不断减小电流源型储能***(400)的无功功率，直到t2时刻完全切出。According to the control and debugging method of claim 1, in the step of gradually putting the active load into the wind turbine active power climbing process, starting from time t1, the reactive power of the current source energy storage system (400) is continuously reduced, It is completely cut out until time t2.
  9. 根据权利要求1所述的控制调试方法，所述风力发电支路还包括断路器K1、变流器(101)、箱式变压器T1和风机并网电缆(500)；According to the control and debugging method of claim 1, the wind power generation branch also includes a circuit breaker K1, a converter (101), a box-type transformer T1 and a wind turbine grid-connected cable (500);
    所述断路器K1和变流器(101)并联构成并联支路；The circuit breaker K1 and the converter (101) are connected in parallel to form a parallel branch;
    所述风力发电机(100)的输出端通过并联支路与箱式变压器T1的低压侧连接；所述箱式变压器T1的高压侧通过风机并网电缆(500)与断路器K2连接。The output end of the wind turbine (100) is connected to the low-voltage side of the box-type transformer T1 through a parallel branch; the high-voltage side of the box-type transformer T1 is connected to the circuit breaker K2 through the wind turbine grid connection cable (500).
  10. 根据权利要求1所述的控制调试方法，所述储能支路包括：电压源型储能***(300)、电流源型储能***(400)和箱式变压器T2；The control and debugging method according to claim 1, the energy storage branch includes: a voltage source energy storage system (300), a current source energy storage system (400) and a box-type transformer T2;
    所述电压源型储能***(300)和电流源型储能***(400)并联并通过箱式变压器T2连接高压母线(200)。The voltage source energy storage system (300) and current source energy storage system (400) are connected in parallel and connected to the high-voltage bus (200) through a box-type transformer T2.
  11. 根据权利要求10所述的控制调试方法，所述电压源型储能***(300)包括若干台并联的电压源型储能装置；电流源型储能***(400)包括若干台并联的电流源型储能装置。According to the control and debugging method of claim 10, the voltage source energy storage system (300) includes several parallel voltage source energy storage devices; the current source energy storage system (400) includes several parallel current sources. type energy storage device.
  12. 根据权利要求10所述的控制调试方法，所述电压源型储能***(300)采用虚拟同步控制模式。According to the control and debugging method of claim 10, the voltage source energy storage system (300) adopts a virtual synchronous control mode.
  13. 根据权利要求10所述的控制调试方法，所述电流源型储能***(400)采用PQ控制模式。According to the control and debugging method of claim 10, the current source energy storage system (400) adopts PQ control mode.
  14. 根据权利要求1所述的控制调试方法，所述风力发电机(100)为双馈异步风力发电机。According to the control and debugging method of claim 1, the wind turbine (100) is a doubly-fed asynchronous wind turbine.
  15. 根据权利要求1所述的控制调试方法，还包括风储荷协调控制装置；所述风储荷协调控制装置，用于采集箱式变压器T2低压侧的电压u0和电流i0；对集箱式变压器T2低压侧的电压u0和电流i0进行解耦并计算出集箱式变压器T2低压侧的发出的无功功率QA；对电流源型储能***(400)进行控制，设置电流源型储能***(400)的无功功率参考值为变压器T2低压侧无功功率的相反数，形成闭环控制。 The control and debugging method according to claim 1, further comprising a wind load storage coordination control device; the wind load storage coordination control device is used to collect the voltage u 0 and current i 0 at the low voltage side of the box-type transformer T2; Decouple the voltage u 0 and current i 0 at the low-voltage side of the header-type transformer T2 and calculate the reactive power Q A generated by the low-voltage side of the header-type transformer T2; control the current source energy storage system (400) and set the current The reactive power reference value of the source energy storage system (400) is the opposite number of the reactive power on the low-voltage side of the transformer T2, forming a closed-loop control.
PCT/CN2023/111740 2022-06-30 2023-08-08 Control debugging method for off-grid wind storage load power generation system WO2024002387A1 (en)

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