WO2011157043A1 - Testing device for power grid adaptability of wind generator set - Google Patents

Testing device for power grid adaptability of wind generator set Download PDF

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Publication number
WO2011157043A1
WO2011157043A1 PCT/CN2010/080463 CN2010080463W WO2011157043A1 WO 2011157043 A1 WO2011157043 A1 WO 2011157043A1 CN 2010080463 W CN2010080463 W CN 2010080463W WO 2011157043 A1 WO2011157043 A1 WO 2011157043A1
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Prior art keywords
converter
output
input
phase
bridge circuit
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PCT/CN2010/080463
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French (fr)
Chinese (zh)
Inventor
盛小军
王志华
周党生
吕一航
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深圳市禾望电气有限公司
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Publication of WO2011157043A1 publication Critical patent/WO2011157043A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • 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
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • 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

Definitions

  • the present invention relates to a test apparatus, and more particularly to a test apparatus for testing the adaptability of a wind turbine grid. Background technique
  • the grid fault simulation device in the wind turbine grid adaptability test system generally consists of a reactance network and a switch, wherein XI is a series current limiting reactance, X2 is a variable short-circuit reactance, and X3 is a line simulation.
  • Reactance, and S is a controlled switch. The switch S is closed, and the grid fault simulation device 2 simulates the short circuit of the power grid, and causes the power grid voltage drop and other faults at the wind turbine generator end to be tested, and then the wind power generator group can be tested for the grid adaptability under the simulation conditions such as the grid fault.
  • the converter includes a controller and a rectifier connected in sequence, a DC link, an inverter, the controller and the rectifier, and the inverter signal Connected, the rectifier is connected to a three-phase power supply, and the inverter is connected to the wind power generator set.
  • the rectifier includes a first bridge circuit composed of a power semiconductor switching device, and a reactance serially connected to each phase of the input end of the first bridge circuit;
  • the DC link includes a DC capacitor connected in series at an output end of the bridge circuit;
  • the inverter includes a second bridge circuit composed of a power semiconductor switching device, and is serially connected to each phase of the output end of the second bridge circuit Reactance; the second bridge circuit input is connected to the first bridge circuit output.
  • the AC-AC converter includes a matrix converter, an input reactance group, and an output reactance group, and the reactances of the input reactance groups are respectively connected in series to the matrix converter.
  • the reactances of the output reactance groups are respectively connected in series with the output ends of the respective phases of the matrix converter.
  • Fig. 2 is a structural diagram of a grid fault simulating device in an existing wind turbine adaptor test system.
  • Fig. 4 is a structural diagram 1 of the wind power generator grid adaptability test system, the wind power generator grid adaptability test device of the present invention.
  • Fig. 5 is a circuit diagram showing a first embodiment of the wind power generator adaptability testing device of the present invention.
  • 6 is a circuit diagram of a second embodiment of the wind power generator adaptability testing device of the present invention.
  • Fig. 7 is a structural diagram 2 of the wind turbine generator grid adaptability test system, and the wind turbine generator grid adaptability test device of the present invention.
  • the implementation circuit of the converter 20 is as follows: the converter 20 adopts a three-phase three-wire input and output mode (delta connection method), wherein the input terminals Inl, In2, In3 are connected to the three-phase power supply, and the output terminal Outl , Out2, Out3 are connected to the wind turbine to be tested.
  • the converter 20 includes a rectifier 200, a DC link 300, an inverter 400, and a controller 500.
  • the DC link 300 includes a DC capacitor group Cdcl which is connected in series with the output of the bridge circuit.
  • the inverter 400 includes an output reactance L4 ⁇ L6, an output capacitor group C4 ⁇ C6, and a bridge circuit composed of a power semiconductor switching device Q7 Q12.
  • the output reactance L4 L6 is serially connected to each phase of the output of the bridge circuit, and the output capacitor Group C4 C6 is connected between the two phases of the converter output.
  • the controller 500 is signally coupled to the rectifier 200 and the inverter 400.
  • the input capacitor group C1 ⁇ C3 and the output capacitor group C4 ⁇ C6 function to absorb the grid load shock and ensure the stability of the analog grid voltage signal output by the wind turbine generator adaptability test device.
  • the input capacitor groups C1 to C3 and the output capacitor groups C4 to C6 are not provided, and the implementation of the object of the present invention is not affected.
  • the converter 20 of the wind turbine generator adaptability testing device of the present invention The implementation circuit is as follows:
  • the converter adopts three-phase four-wire input and output mode (star connection method), wherein the input terminals Inl, In2, In3 and InN (neutral input terminal) are connected to the three-phase power supply and the neutral line, and the output terminal Outl, Out2, Out3 and OutN (middle line output) connect the three-phase and neutral lines of the wind turbine to be tested.
  • the converter 20 includes a rectifier 800, a DC link 900, an inverter 1000, and a controller 1100.
  • the inverter 1000 includes an output reactance L14 ⁇ L16, an output capacitor group C14 C16, and a bridge circuit composed of a power semiconductor switching device Q19 Q24.
  • the output reactance L14 L16 is connected in series on each phase of the output of the bridge circuit, and the output capacitor group C14 C16 is connected between the output of the converter and the neutral line of the three-phase power supply.
  • the bridge circuit input terminal composed of the power semiconductor switching devices Q13 to Q18 is connected to the bridge circuit output terminal composed of the power semiconductor switching device Q13 Q18.
  • the controller 1100 is connected to the rectifier 800 and the inverter 1000.
  • the rectifier 800 converts the three-phase AC voltage from the three-phase power source into a DC voltage on the DC link 900
  • the inverter 1000 converts the DC voltage on the DC link 900 into a required three-phase AC voltage, and outputs it to the test.
  • Wind Turbine The controller sends a control command to the rectifier 800 and the inverter 1000 through the controller 1100 to provide the analog grid voltage required for the test to the wind turbine to be tested.
  • the input capacitor groups C11 ⁇ C13 and the output capacitor group C14 C16 function to absorb the grid load shock and ensure the stability of the analog grid voltage signal output by the wind turbine grid adaptability test device.
  • the input capacitor groups C11 ⁇ C13 and the output capacitor group C14 C16 are not set, and the present invention is not affected. Implementation of the object of the invention.
  • the converter 20 includes an AC-to-AC converter 2000 and a controller 2100, and the controller 2100 is connected to the AC-AC converter 2000.
  • the converter of this embodiment adopts a three-phase three-wire input and output mode, wherein the input terminals In1 ⁇ In3 are connected to the three-phase power supply, and the output terminals Outl ⁇ Out3 are connected to the wind power generator to be tested.
  • the converter 20 includes an AC-AC converter 2000 and a controller 2100, and an AC-AC converter 2000 is connected to the three-phase power source and the wind turbine.
  • the AC-AC converter 2000 directly converts the three-phase AC voltage from the three-phase power supply into the three-phase AC voltage required for the test and outputs it to the wind power unit to be tested.
  • the controller 2100 is coupled to the AC-AC converter 2000 signal. The controller sends a control command to the AC-to-AC converter 2000 through the controller 2100 to provide the analog grid voltage required for the test to the wind turbine to be tested.
  • the AC-AC converter 2000 includes a matrix circuit 2200, an input capacitor group C21 ⁇ C23, an input reactance L21 ⁇ L23, an output reactance L24 L26, and an output capacitor group C24 C26.
  • the input reactances L21-L23 are respectively connected in series to the matrix circuit 2200.
  • the input capacitor group C21 C23 is respectively connected between the two phases of the input end of the AC-AC converter 2000
  • the output reactance L24 L26 are respectively connected in series to the output terminals of the matrix circuits 2200
  • the output capacitor group C24 C26 They are respectively connected between the two phases of the output of the AC-AC converter 2000.
  • the matrix circuit 2200 is composed of a power semiconductor switching device Q31 Q39 which can be connected in reverse as a two-way controllable switch.
  • the power semiconductor switching devices in the above embodiments include, but are not limited to, one of an insulated gate bipolar transistor (IGBT), a gate turn-off thyristor (GTO), and an integrated gate commutated thyristor (IGCT), which may also be used.
  • the converter 20 is constructed in combination.

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

Abstract

A testing device for power grid adaptability of a wind generator set comprises a converter (20) constituted based on power semiconductor switching devices, and the input terminal of the converter (20) is connected to a three-phase power supply (1), and the output terminal thereof is connected to the wind generator set (3). Due to the adoption of the converter (20) constituted based on power semiconductor switching devices, the testing device for power grid adaptability of the wind generator set has the advantages of high power density, small volume, and low cost, and capabilities of bearing a majority of dynamic impulses caused by the wind generator set (3) in the period of fault experiment of the power grid to reduce the requirement of an experiment system on the capacity of the power grid. The stepless regulation of voltage and frequency is realized to conveniently and flexibly simulate various power grid faults, extend the test range, enrich test data and reduce the experiment period. And various initial states of power grid voltage are simulated prior to the power grid fault test to completely test the fault data of the wind generator set (3) in various states of the power grid.

Description

一种风力发电机组电网适应性测试装置 技术领域  Wind power generator grid adaptability test device
本发明涉及一种测试装置，更具体地说，涉及一种用于测试风力发电机组 电网适应性的测试装置。 背景技术  The present invention relates to a test apparatus, and more particularly to a test apparatus for testing the adaptability of a wind turbine grid. Background technique
随着风电产业的高速发展以及风电装机容量在国家电力结构的比例不断 提升，越来越多的国家对并网型风力发电机组的电网接入条件及电网适应性提 出了严格要求。其中包括风力发电机组对电网电压、频率的偏差、波动的适应， 及低压穿越性能 （Low Voltage Ride Through, 简称 LVRT) 等。 低压穿越性能 是指在所连接电网发生故障导致风电场电压跌落后，风力发电机组保持不间断 并网运行， 从而避免风电场的切除严重影响到电网系统运行稳定性的能力。  With the rapid development of the wind power industry and the increasing proportion of wind power installed capacity in the country's power structure, more and more countries have imposed strict requirements on the grid access conditions and grid adaptability of grid-connected wind turbines. These include wind turbines' grid voltage and frequency deviations, fluctuations, and Low Voltage Ride Through (LVRT). The low-voltage ride-through performance refers to the ability of the wind turbine to remain uninterrupted and connected to the grid after the fault of the connected grid causes the wind farm voltage to fall, thus avoiding the ability of the wind farm to seriously affect the stability of the grid system.
风力发电机组的电网适应性（特别是低压穿越性能）一般要在电网发生故 障时才能展现出来， 但电网发生故障， 特别是严重故障的机会较少。为了深入 测试、 比较和改善风力发电机组的电网适应性 （含低压穿越性能）， 需要构建 可反复进行实验的风力发电机组电网适应性测试系统。如图 1所示， 风力发电 机组电网适应性测试系统一般由三相电源 1 (电网或三相交流发电机等）、 电 网故障模拟装置 2及待测的风力发电机组 3 (或其关键子系统） 组成。  The grid adaptability of wind turbines (especially low-voltage ride-through performance) is generally manifested in the event of a grid failure, but there are fewer opportunities for grid failures, especially for severe faults. In order to thoroughly test, compare and improve the grid adaptability of wind turbines (including low-voltage ride-through performance), it is necessary to construct a wind turbine generator grid adaptability test system that can be repeatedly tested. As shown in Figure 1, the wind turbine grid adaptability test system generally consists of three-phase power supply 1 (grid or three-phase alternator, etc.), grid fault simulation device 2 and wind turbine 3 to be tested (or its key subsystem). ) Composition.
如图 2所示， 目前，风力发电机组电网适应性测试系统中的电网故障模拟 装置一般由电抗网络及开关组成， 其中 XI为串联限流电抗, X2为可变的短路 电抗， X3为线路模拟电抗， 而 S为受控的开关。 开关 S闭合， 电网故障模拟 装置 2模拟电网短路，在待测风力发电机组端造成电网电压跌落等故障， 即可 对待测风力发电机组在电网故障等模拟条件下进行电网适应性测试。  As shown in Fig. 2, at present, the grid fault simulation device in the wind turbine grid adaptability test system generally consists of a reactance network and a switch, wherein XI is a series current limiting reactance, X2 is a variable short-circuit reactance, and X3 is a line simulation. Reactance, and S is a controlled switch. The switch S is closed, and the grid fault simulation device 2 simulates the short circuit of the power grid, and causes the power grid voltage drop and other faults at the wind turbine generator end to be tested, and then the wind power generator group can be tested for the grid adaptability under the simulation conditions such as the grid fault.
上述现有电网故障模拟装置存在如下缺陷：  The above existing grid fault simulation device has the following drawbacks:
1、 装置体积庞大， 成本高， 且对电网容量有较高要求， 调节不便， 实 验周期长；  1. The device is bulky, high in cost, and has high requirements on grid capacity, inconvenient adjustment, and long test period;
2、 由于需模拟电网的深度跌落，要求电抗网络中的串联限流电抗 XI相 对较大， 对风力发电机组的初始运行状态及电网故障模拟过程中的 测试参数影响较大； 2. Due to the need to simulate the deep drop of the power grid, the series current limiting reactance XI phase in the reactive network is required. Larger, it has a greater impact on the initial operating state of the wind turbine and the test parameters in the grid fault simulation process;
3、 电网故障测试前的电网电压初始状态基本不能调节， 故难以测试风 力发电机组在电网各种状态下发生故障时的完整数据。 发明内容  3. The initial state of the grid voltage before the grid fault test can hardly be adjusted, so it is difficult to test the complete data of the wind turbine set when the grid fails in various states. Summary of the invention
本发明要解决的技术问题在于， 克服现有电网故障模拟装置的上述缺陷， 提供一种风力发电机组电网适应性测试装置。  The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the existing power grid fault simulation device and provide a wind power generator grid adaptability test device.
本发明解决其技术问题所采用的技术方案是：构造一种风力发电机组电网 适应性测试装置， 其特征在于， 包括基于功率半导体开关器件构建的变流器， 该变流器输入端连接三相电源、 输出端连接风力发电机组。  The technical solution adopted by the present invention to solve the technical problem thereof is to construct a wind power generator grid adaptability testing device, which is characterized in that it comprises a converter constructed based on a power semiconductor switching device, and the input end of the converter is connected to three phases. The power supply and output are connected to the wind turbine.
在本发明的风力发电机组电网适应性测试装置中，所述变流器包括控制器 和依次连接的整流器、 直流环节、 逆变器， 所述控制器与所述整流器、 所述逆 变器信号连接， 所述整流器连接三相电源， 所述逆变器连接风力发电机组。  In the wind power generator grid adaptability testing device of the present invention, the converter includes a controller and a rectifier connected in sequence, a DC link, an inverter, the controller and the rectifier, and the inverter signal Connected, the rectifier is connected to a three-phase power supply, and the inverter is connected to the wind power generator set.
在本发明的风力发电机组电网适应性测试装置中，所述整流器包括由功率 半导体开关器件组成的第一桥式电路、串接在该第一桥式电路输入端各相上的 电抗； 所述直流环节包括串接在所述桥式电路输出端的直流电容； 所述逆变器 包括由功率半导体开关器件组成的第二桥式电路、串接在该第二桥式电路输出 端各相上的电抗； 所述第二桥式电路输入端连接所述第一桥式电路输出端。  In the wind power generator grid adaptability testing device of the present invention, the rectifier includes a first bridge circuit composed of a power semiconductor switching device, and a reactance serially connected to each phase of the input end of the first bridge circuit; The DC link includes a DC capacitor connected in series at an output end of the bridge circuit; the inverter includes a second bridge circuit composed of a power semiconductor switching device, and is serially connected to each phase of the output end of the second bridge circuit Reactance; the second bridge circuit input is connected to the first bridge circuit output.
在本发明的风力发电机组电网适应性测试装置中，所述整流器包括输入电 容组，所述逆变器包括输出电容组，所述输入电容组的电容对应连接在所述变 流器输入端两相之间，所述输出电容组的电容对应连接在所述变流器输出端两 相之间。  In the wind power generator grid adaptability testing device of the present invention, the rectifier includes an input capacitor group, the inverter includes an output capacitor group, and the capacitance of the input capacitor group is correspondingly connected to the converter input terminal. Between the phases, the capacitance of the output capacitor group is correspondingly connected between the two phases of the output of the converter.
在本发明的风力发电机组电网适应性测试装置中，所述整流器包括由功率 半导体开关器件组成的第三桥式电路、串接在该第三桥式电路输入端各相上的 电抗；所述直流环节包括串接在所述桥式电路输出端的串接第一直流电容和第 二直流电容， 该第一直流电容和第二直流电容的串接端连接三相电源中线； 所 述变流器包括由功率半导体开关器件组成的第四桥式电路、串接在该第四桥式 电路输出端各相上的电抗；所述第四桥式电路输入端连接所述第三桥式电路输 出端。 In the wind turbine grid adaptability testing device of the present invention, the rectifier includes a third bridge circuit composed of a power semiconductor switching device, and a reactance serially connected to each phase of the input end of the third bridge circuit; The DC link includes a series connection of the first DC capacitor and the second DC capacitor connected to the output end of the bridge circuit, and the serial connection end of the first DC capacitor and the second DC capacitor is connected to the three-phase power neutral line; the converter Including a fourth bridge circuit composed of power semiconductor switching devices, serially connected to the fourth bridge a reactance on each phase of the output of the circuit; the input of the fourth bridge circuit is coupled to the output of the third bridge circuit.
在本发明的风力发电机组电网适应性测试装置中，所述整流器包括输入电 容组，所述逆流器包括输出电容组，所述输入电容组的电容对应连接在所述变 流器输入端各相与三相电源中线之间，所述输出电容组的电容对应连接在所述 变流器输出端与三相电源中线之间。  In the wind power generator grid adaptability testing device of the present invention, the rectifier includes an input capacitor group, and the inverter includes an output capacitor group, and the capacitance of the input capacitor group is correspondingly connected to each phase of the converter input end. Between the three-phase power supply neutral line, the capacitance of the output capacitor group is correspondingly connected between the converter output end and the three-phase power supply neutral line.
在本发明的风力发电机组电网适应性测试装置中，所述变流器包括交流一 交流变换器和控制器， 所述交流一交流变换器连接三相电源和风力发电机组， 所述控制器与所述交流一交流变换器信号连接。  In the wind power generator grid adaptability testing device of the present invention, the converter includes an AC-AC converter and a controller, the AC-AC converter is connected to a three-phase power source and a wind power generator, and the controller The AC-AC converter signal is connected.
在本发明的风力发电机组电网适应性测试装置中，所述交流一交流变换器 包括矩阵变换器、输入电抗组和输出电抗组，所述输入电抗组的电抗分别对应 串接在该矩阵变换器的各相输入端，所述输出电抗组的电抗分别对应串接在该 矩阵变换器的各相输出端。  In the wind power generator grid adaptability testing device of the present invention, the AC-AC converter includes a matrix converter, an input reactance group, and an output reactance group, and the reactances of the input reactance groups are respectively connected in series to the matrix converter. At the input of each phase, the reactances of the output reactance groups are respectively connected in series with the output ends of the respective phases of the matrix converter.
在本发明的风力发电机组电网适应性测试装置中，所述变流器包括输入电 容组和输出电容组，所述输入电容组的电容连接在所述交流一交流变换器的输 入端两相之间，所述输出电容组的电容连接在所述交流一交流变换器的输出端 两相之间。  In the wind power generator grid adaptability testing device of the present invention, the current transformer includes an input capacitor group and an output capacitor group, and a capacitance of the input capacitor group is connected to an input end of the AC-AC converter. The capacitance of the output capacitor group is connected between two phases of the output of the AC-AC converter.
在本发明的风力发电机组电网适应性测试装置中，所述功率半导体开关器 件为绝缘栅双极晶体管， 门极可关断晶闸管，集成门极换流晶闸管之一或其组 合。  In the wind turbine grid adaptability test apparatus of the present invention, the power semiconductor switching device is an insulated gate bipolar transistor, a gate turn-off thyristor, an integrated gate commutated thyristor or a combination thereof.
实施本发明的风力发电机组电网适应性测试装置， 与现有技术比较， 其有 益效果是：  The wind power generator grid adaptability test device embodying the present invention has a beneficial effect compared with the prior art:
1. 采用基于功率半导体开关器件构建的变流器， 功率密度大， 体积小、 成本低， 并且能够承受电网适应性实验期间风力发电机组造成的大 部分动态冲击， 从而缓解实验系统对电网容量的要求；  1. A converter based on power semiconductor switching devices, with high power density, small size, low cost, and able to withstand most of the dynamic impacts caused by wind turbines during grid adaptability experiments, thereby mitigating the experimental system's capacity for the grid. Claim;
2. 能够实现电压、 频率的无级调节， 从而可方便、 灵活地模拟各类电 网偏差及故障， 扩展测试范围， 丰富测试数据， 缩减实验周期； 2. It can realize stepless adjustment of voltage and frequency, so that it can easily and flexibly simulate various types of grid deviations and faults, expand the test range, enrich test data, and reduce the experimental period;
3. 还能够在电网适应性测试前模拟电网电压的各种初始状态， 从而实 现完整测试风力发电机组在电网各种状态下发生故障时的数据。 附图说明 3. It is also possible to simulate various initial states of the grid voltage before the grid adaptability test, thus The data of the wind turbine in the event of a failure in various states of the grid is now fully tested. DRAWINGS
下面将结合附图及实施例对本发明作进一歩说明， 附图中：  The present invention will be further described with reference to the accompanying drawings and embodiments in which:
图 1 是现有采用电网故障模拟装置测试风力发电机组电网适应性的测试 系统示意图。  Figure 1 is a schematic diagram of a test system for testing the adaptability of a wind turbine grid using a grid fault simulation device.
图 2是现有风力发电机组电网适应性测试系统中，电网故障模拟装置的结 构图。  Fig. 2 is a structural diagram of a grid fault simulating device in an existing wind turbine adaptor test system.
图 3 是运用本发明风力发电机组电网适应性测试装置测试风力发电机组 电网适应性的测试系统示意图。  Fig. 3 is a schematic diagram of a test system for testing the adaptability of a wind turbine grid using the wind turbine grid adaptability test device of the present invention.
图 4是在风力发电机组电网适应性测试系统， 本发明风力发电机组电网 适应性测试装置的结构图一。  Fig. 4 is a structural diagram 1 of the wind power generator grid adaptability test system, the wind power generator grid adaptability test device of the present invention.
图 5是本发明风力发电机组电网适应性测试装置的实施例一的电路图。 图 6是本发明风力发电机组电网适应性测试装置的实施例二的电路图。 图 7是在风力发电机组电网适应性测试系统， 本发明风力发电机组电网 适应性测试装置的结构图二。  Fig. 5 is a circuit diagram showing a first embodiment of the wind power generator adaptability testing device of the present invention. 6 is a circuit diagram of a second embodiment of the wind power generator adaptability testing device of the present invention. Fig. 7 is a structural diagram 2 of the wind turbine generator grid adaptability test system, and the wind turbine generator grid adaptability test device of the present invention.
图 8是本发明风力发电机组电网适应性测试装置的实施例三的电路图。 具体实施方式  Figure 8 is a circuit diagram of a third embodiment of the wind power generator adaptability testing device of the present invention. detailed description
实施例一  Embodiment 1
如图 3所示，本发明的风力发电机组电网适应性测试装置采用基于功率半 导体开关器件构建的变流器 20来实现， 变流器 20输入端连接三相电源 1、 输 出端连接风力发电机组 2。 根据需要， 风力发电机组电网适应性测试装置可以 在变流器 20的基础上增加其他结构。  As shown in FIG. 3, the wind power generator grid adaptability testing device of the present invention is realized by a converter 20 constructed based on a power semiconductor switching device, and the input end of the converter 20 is connected to the three-phase power source 1, and the output terminal is connected to the wind power generator set. 2. The wind turbine grid adaptability test device can add other structures to the converter 20 as needed.
如图 4所示， 变流器 20包括控制器 500、整流器 200、直流环节 300和逆 变器 400， 整流器 200、 直流环节 300、 逆变器 400依次连接， 控制器 500与 整流器 200、 逆变器 400信号连接， 整流器连接三相电源 1， 逆变器 400连接 风力发电机组 3， 向待测风力发电机组提供测试电压。 用户通过控制器 500向整流器 200和逆变器 400发送控制指令，通过控制 整流器 200、 直流环节 300、 逆变器 400， 向待测风力发电机组提供测试所需 的模拟电网电压。 As shown in FIG. 4, the converter 20 includes a controller 500, a rectifier 200, a DC link 300, and an inverter 400. The rectifier 200, the DC link 300, and the inverter 400 are sequentially connected, the controller 500 and the rectifier 200, and the inverter. The device 400 is connected to the signal, the rectifier is connected to the three-phase power supply 1, and the inverter 400 is connected to the wind power generation unit 3 to provide a test voltage to the wind power generation unit to be tested. The controller sends a control command to the rectifier 200 and the inverter 400 through the controller 500, and controls the rectifier grid 200, the DC link 300, and the inverter 400 to provide the simulated grid voltage required for the test to the wind turbine to be tested.
如图 5所示，变流器 20的实施电路如下：变流器 20采用三相三线的输入、 输出方式 （三角形接法）， 其中输入端子 Inl、 In2、 In3连接三相电源， 输出 端子 Outl、 Out2、 Out3连接待测风力发电机组。 变流器 20包括整流器 200、 直流环节 300、 逆变器 400和控制器 500。  As shown in FIG. 5, the implementation circuit of the converter 20 is as follows: the converter 20 adopts a three-phase three-wire input and output mode (delta connection method), wherein the input terminals Inl, In2, In3 are connected to the three-phase power supply, and the output terminal Outl , Out2, Out3 are connected to the wind turbine to be tested. The converter 20 includes a rectifier 200, a DC link 300, an inverter 400, and a controller 500.
整流器 200包括输入电容组 C1~C3、 输入电抗 L1 L3和由功率半导体开 关器件 Q1 Q6构成的桥式电路， 输入电抗 L1 L3串接在该桥式电路输入端各 相上， 输入电容组 C1 C3 分别连接在变流器的输入端两相之间。  The rectifier 200 includes an input capacitor group C1~C3, an input reactance L1 L3, and a bridge circuit formed by the power semiconductor switching device Q1 Q6. The input reactance L1 L3 is serially connected to each phase of the input end of the bridge circuit, and the input capacitor group C1 C3 They are connected between the two phases of the input of the converter.
直流环节 300包含直流电容组 Cdcl ,该直流电容组 Cdcl串接在上述桥式 电路输出端。  The DC link 300 includes a DC capacitor group Cdcl which is connected in series with the output of the bridge circuit.
逆变器 400包括输出电抗 L4~L6、 输出电容组 C4~C6和由功率半导体开 关器件 Q7 Q12构成的桥式电路， 输出电抗 L4 L6串接在该桥式电路输出端 各相上， 输出电容组 C4 C6分别连接在变流器输出端两相之间。  The inverter 400 includes an output reactance L4~L6, an output capacitor group C4~C6, and a bridge circuit composed of a power semiconductor switching device Q7 Q12. The output reactance L4 L6 is serially connected to each phase of the output of the bridge circuit, and the output capacitor Group C4 C6 is connected between the two phases of the converter output.
由功率半导体开关器件 Q7~Q12 构成的桥式电路输入端连接由功率半导 体开关器件 Q1 Q6构成的桥式电路输出端。  The bridge circuit input terminal composed of the power semiconductor switching devices Q7~Q12 is connected to the bridge circuit output terminal composed of the power semiconductor switching device Q1 Q6.
控制器 500与整流器 200、 逆变器 400信号连接。  The controller 500 is signally coupled to the rectifier 200 and the inverter 400.
整流器 200将来自三相电源的三相交流电压转换为直流环节 300上的直流 电压，逆变器 400再将直流环节 300上的直流电压转换为所需的三相交流电压， 并输出至待测风力发电机组。用户通过控制器 500向整流器 200和逆变器 400 发送控制指令， 向待测风力发电机组提供测试所需的模拟电网电压。  The rectifier 200 converts the three-phase AC voltage from the three-phase power source into a DC voltage on the DC link 300, and the inverter 400 converts the DC voltage on the DC link 300 into a required three-phase AC voltage, and outputs it to the test. Wind Turbine. The controller sends a control command to the rectifier 200 and the inverter 400 through the controller 500 to provide the simulated grid voltage required for the test to the wind turbine to be tested.
输入电容组 C1~C3、 输出电容组 C4~C6起吸收电网负载冲击、 保证风力 发电机组电网适应性测试装置输出的模拟电网电压信号稳定的作用。在其他实 施例中， 不设置输入电容组 C1~C3、 输出电容组 C4~C6， 不影响本发明目的 的实现。  The input capacitor group C1~C3 and the output capacitor group C4~C6 function to absorb the grid load shock and ensure the stability of the analog grid voltage signal output by the wind turbine generator adaptability test device. In other embodiments, the input capacitor groups C1 to C3 and the output capacitor groups C4 to C6 are not provided, and the implementation of the object of the present invention is not affected.
实施例二  Embodiment 2
如图 6所示， 本发明的风力发电机组电网适应性测试装置的变流器 20的 实施电路如下： 变流器采用三相四线的输入、 输出方式 （星形接法）， 其中输 入端子 Inl、 In2、 In3及 InN (中线输入端） 连接三相电源及中线， 输出端子 Outl、 Out2、 Out3及 OutN (中线输出端）连接待测风力发电机组三相及中线。 变流器 20包括整流器 800、 直流环节 900、 逆变器 1000和控制器 1100。 As shown in FIG. 6, the converter 20 of the wind turbine generator adaptability testing device of the present invention The implementation circuit is as follows: The converter adopts three-phase four-wire input and output mode (star connection method), wherein the input terminals Inl, In2, In3 and InN (neutral input terminal) are connected to the three-phase power supply and the neutral line, and the output terminal Outl, Out2, Out3 and OutN (middle line output) connect the three-phase and neutral lines of the wind turbine to be tested. The converter 20 includes a rectifier 800, a DC link 900, an inverter 1000, and a controller 1100.
整流器 800包括输入电容组 C11~C13、 输入电抗 L11 L13和由功率半导 体开关器件 Q13 Q18构成的桥式电路， 输入电抗 L11 L13串接在该桥式电路 输入端各相上， 输入电容组 C11 C13分别连接在变流器输入端各相与三相电 源中线之间。  The rectifier 800 includes an input capacitor group C11~C13, an input reactance L11 L13, and a bridge circuit composed of a power semiconductor switching device Q13 Q18. The input reactance L11 L13 is serially connected to each phase of the input end of the bridge circuit, and the input capacitor group C11 C13 Connected between the phase of the input of the converter and the neutral line of the three-phase power supply.
所述直流环节 900 包括串联的直流电容组 Cdcll、 Cdcl2， 直流电容组 Cdcll、Cdcl2串接在由功率半导体开关器件 Q13~Q18构成的桥式电路输出端。 其中直流电容组 Cdcll、 Cdcl2的串接端 DcN同时连接至三相电源中线 InN。  The DC link 900 includes a DC capacitor group Cdcll and Cdcl2 connected in series, and a DC capacitor group Cdcll and Cdcl2 are serially connected to a bridge circuit output end composed of power semiconductor switching devices Q13~Q18. The serial connection terminal DcN of the DC capacitor group Cdcll and Cdcl2 is simultaneously connected to the three-phase power supply line InN.
逆变器 1000包括输出电抗 L14~L16、输出电容组 C14 C16和由功率半导 体开关器件 Q19 Q24构成的桥式电路。输出电抗 L14 L16串接在该桥式电路 输出端各相上， 输出电容组 C14 C16分别连接在变流器输出端与三相电源中 线之间。  The inverter 1000 includes an output reactance L14~L16, an output capacitor group C14 C16, and a bridge circuit composed of a power semiconductor switching device Q19 Q24. The output reactance L14 L16 is connected in series on each phase of the output of the bridge circuit, and the output capacitor group C14 C16 is connected between the output of the converter and the neutral line of the three-phase power supply.
由功率半导体开关器件 Q13~Q18构成的桥式电路输入端连接由功率半导 体开关器件 Q13 Q18构成的桥式电路输出端。  The bridge circuit input terminal composed of the power semiconductor switching devices Q13 to Q18 is connected to the bridge circuit output terminal composed of the power semiconductor switching device Q13 Q18.
控制器 1100与整流器 800、 逆变器 1000信号连接。  The controller 1100 is connected to the rectifier 800 and the inverter 1000.
整流器 800将来自三相电源的三相交流电压转换为直流环节 900上的直流 电压， 逆变器 1000再将直流环节 900上的直流电压转换为所需的三相交流电 压， 并输出至待测风力发电机组。 用户通过控制器 1100向整流器 800和逆变 器 1000发送控制指令， 向待测风力发电机组提供测试所需的模拟电网电压。  The rectifier 800 converts the three-phase AC voltage from the three-phase power source into a DC voltage on the DC link 900, and the inverter 1000 converts the DC voltage on the DC link 900 into a required three-phase AC voltage, and outputs it to the test. Wind Turbine. The controller sends a control command to the rectifier 800 and the inverter 1000 through the controller 1100 to provide the analog grid voltage required for the test to the wind turbine to be tested.
本实施例采用三相四线电路，可更便于对各相电压 Voutl (VoutlN=Voutl -VoutN), Vout2 ( Vout2N = Vout2 - VoutN ) ,Vout3 ( Vout3N = Vout3 - VoutN ) 实施独立的故障模拟。  This embodiment adopts a three-phase four-wire circuit, which makes it easier to implement independent fault simulation for each phase voltage Voutl (VoutlN=Voutl -VoutN), Vout2 (Vout2N = Vout2 - VoutN), and Vout3 (Vout3N = Vout3 - VoutN).
输入电容组 C11~C13、 输出电容组 C14 C16起吸收电网负载冲击、 保证 风力发电机组电网适应性测试装置输出的模拟电网电压信号稳定的作用。在其 他实施例中， 不设置输入电容组 C11~C13、 输出电容组 C14 C16, 不影响本 发明目的的实现。 The input capacitor groups C11~C13 and the output capacitor group C14 C16 function to absorb the grid load shock and ensure the stability of the analog grid voltage signal output by the wind turbine grid adaptability test device. In other embodiments, the input capacitor groups C11~C13 and the output capacitor group C14 C16 are not set, and the present invention is not affected. Implementation of the object of the invention.
实施例三  Embodiment 3
如图 7所示， 变流器 20包括交流一交流变换器 2000和控制器 2100， 控 制器 2100与交流一交流变换器 2000信号连接。  As shown in FIG. 7, the converter 20 includes an AC-to-AC converter 2000 and a controller 2100, and the controller 2100 is connected to the AC-AC converter 2000.
如图 8所示， 本发明的风力发电机组电网适应性测试装置的变流器 20的 实施电路如下：  As shown in Fig. 8, the implementation circuit of the converter 20 of the wind turbine adaptor test apparatus of the present invention is as follows:
本实施例的变流器采用三相三线的输入、输出方式，其中输入端子 Inl~In3 连接三相电源， 输出端子 Outl~Out3连接待测风力发电机组。  The converter of this embodiment adopts a three-phase three-wire input and output mode, wherein the input terminals In1~In3 are connected to the three-phase power supply, and the output terminals Outl~Out3 are connected to the wind power generator to be tested.
变流器 20包括交流一交流变换器 2000和控制器 2100, 交流一交流变换器 2000连接三相电源和风力发电机组。交流一交流变换器 2000将来自三相电源 的三相交流电压直接转换为测试所需的三相交流电压，并输出至待测风力发电 机组。控制器 2100与交流一交流变换器 2000信号连接。用户通过控制器 2100 向交流一交流变换器 2000发送控制指令， 向待测风力发电机组提供测试所需 的模拟电网电压。  The converter 20 includes an AC-AC converter 2000 and a controller 2100, and an AC-AC converter 2000 is connected to the three-phase power source and the wind turbine. The AC-AC converter 2000 directly converts the three-phase AC voltage from the three-phase power supply into the three-phase AC voltage required for the test and outputs it to the wind power unit to be tested. The controller 2100 is coupled to the AC-AC converter 2000 signal. The controller sends a control command to the AC-to-AC converter 2000 through the controller 2100 to provide the analog grid voltage required for the test to the wind turbine to be tested.
交流一交流变换器 2000包括矩阵式电路 2200、输入电容组 C21~C23、输 入电抗 L21~L23、 输出电抗 L24 L26 和输出电容组 C24 C26 , 输入电抗 L21-L23分别串接在矩阵式电路 2200的各相输入端，输入电容组 C21 C23分 别连接在交流一交流变换器 2000的输入端两相之间， 输出电抗 L24 L26分别 串接在矩阵式电路 2200的各相输出端，输出电容组 C24 C26分别连接在交流 一交流变换器 2000的输出端两相之间。矩阵式电路 2200由反向串接可作为双 向可控开关的功率半导体开关器件 Q31 Q39构成。  The AC-AC converter 2000 includes a matrix circuit 2200, an input capacitor group C21~C23, an input reactance L21~L23, an output reactance L24 L26, and an output capacitor group C24 C26. The input reactances L21-L23 are respectively connected in series to the matrix circuit 2200. At the input end of each phase, the input capacitor group C21 C23 is respectively connected between the two phases of the input end of the AC-AC converter 2000, and the output reactance L24 L26 are respectively connected in series to the output terminals of the matrix circuits 2200, and the output capacitor group C24 C26 They are respectively connected between the two phases of the output of the AC-AC converter 2000. The matrix circuit 2200 is composed of a power semiconductor switching device Q31 Q39 which can be connected in reverse as a two-way controllable switch.
上述各实施例中的功率半导体开关器件包括但不限于绝缘栅双极晶体管 (IGBT)、 门极可关断晶闸管 （GTO)、 集成门极换流晶闸管 （IGCT) 之一， 也可以采用它们的组合来构建变流器 20。  The power semiconductor switching devices in the above embodiments include, but are not limited to, one of an insulated gate bipolar transistor (IGBT), a gate turn-off thyristor (GTO), and an integrated gate commutated thyristor (IGCT), which may also be used. The converter 20 is constructed in combination.

Claims

权 利 要 求 书 Claim
1、 一种风力发电机组电网适应性测试装置， 其特征在于， 包括基于功率 半导体开关器件构建的变流器， 该变流器输入端连接三相电源、输出端连接风 力发电机组。 A wind power generator grid adaptability testing device, comprising: a converter constructed based on a power semiconductor switching device, wherein the input end of the converter is connected to a three-phase power source, and the output end is connected to the wind power generator set.
2、如权利要求 1所述的风力发电机组电网适应性测试装置，其特征在于， 所述变流器包括控制器和依次连接的整流器、直流环节、逆变器， 所述控制器 与所述整流器、所述逆变器信号连接， 所述整流器连接三相电源， 所述逆变器 连接风力发电机组。  The wind power generator grid adaptability testing device according to claim 1, wherein the converter comprises a controller and a rectifier connected in sequence, a DC link, an inverter, the controller and the controller The rectifier and the inverter signal are connected, the rectifier is connected to a three-phase power source, and the inverter is connected to the wind power generator set.
3、如权利要求 2所述的风力发电机组电网适应性测试装置，其特征在于， 所述整流器包括由功率半导体开关器件组成的第一桥式电路、串接在该第一桥 式电路输入端各相上的电抗；所述直流环节包括串接在所述桥式电路输出端的 直流电容； 所述逆变器包括由功率半导体开关器件组成的第二桥式电路、 串接 在该第二桥式电路输出端各相上的电抗；所述第二桥式电路输入端连接所述第 一桥式电路输出端。  The wind power generator grid adaptability testing device according to claim 2, wherein the rectifier comprises a first bridge circuit composed of a power semiconductor switching device, and is serially connected to the input end of the first bridge circuit a reactance on each phase; the DC link includes a DC capacitor serially connected to an output of the bridge circuit; the inverter includes a second bridge circuit composed of a power semiconductor switching device, connected in series to the second bridge a reactance on each phase of the output of the circuit; the input of the second bridge circuit is coupled to the output of the first bridge circuit.
4、如权利要求 3所述的风力发电机组电网适应性测试装置，其特征在于， 所述整流器包括输入电容组，所述逆变器包括输出电容组，所述输入电容组的 电容对应连接在所述变流器输入端两相之间，所述输出电容组的电容对应连接 在所述变流器输出端两相之间。  The wind power generator grid adaptability testing device according to claim 3, wherein the rectifier comprises an input capacitor group, the inverter comprises an output capacitor group, and the capacitance of the input capacitor group is correspondingly connected Between the two phases of the input of the converter, the capacitance of the output capacitor group is correspondingly connected between two phases of the output of the converter.
5、如权利要求 2所述的风力发电机组电网适应性测试装置，其特征在于， 所述整流器包括由功率半导体开关器件组成的第三桥式电路、串接在该第三桥 式电路输入端各相上的电抗；所述直流环节包括串接在所述桥式电路输出端的 串接第一直流电容和第二直流电容，该第一直流电容和第二直流电容的串接端 连接三相电源中线；所述变流器包括由功率半导体开关器件组成的第四桥式电 路、 串接在该第四桥式电路输出端各相上的电抗； 所述第四桥式电路输入端连 接所述第三桥式电路输出端。  The wind power generator grid adaptability testing device according to claim 2, wherein the rectifier comprises a third bridge circuit composed of a power semiconductor switching device, and is serially connected to the input end of the third bridge circuit. a reactance on each phase; the DC link includes a first DC capacitor and a second DC capacitor connected in series at an output end of the bridge circuit, and the serial connection of the first DC capacitor and the second DC capacitor is connected to the three-phase a power supply neutral line; the converter includes a fourth bridge circuit composed of a power semiconductor switching device, a reactance serially connected to each phase of the output end of the fourth bridge circuit; and the fourth bridge circuit input terminal connection The output of the third bridge circuit.
6、如权利要求 5所述的风力发电机组电网适应性测试装置，其特征在于， 所述整流器包括输入电容组，所述逆流器包括输出电容组，所述输入电容组的 电容对应连接在所述变流器输入端各相与三相电源中线之间，所述输出电容组 的电容对应连接在所述变流器输出端与三相电源中线之间。 The wind power generator grid adaptability testing device according to claim 5, wherein the rectifier comprises an input capacitor group, and the inverter comprises an output capacitor group, the input capacitor group The capacitor is correspondingly connected between each phase of the converter input end and the three-phase power supply neutral line, and the capacitance of the output capacitor group is correspondingly connected between the converter output end and the three-phase power supply neutral line.
7、如权利要求 1所述的风力发电机组电网适应性测试装置，其特征在于， 所述变流器包括交流一交流变换器和控制器， 所述交流一交流变换器连接三 相电源和风力发电机组， 所述控制器与所述交流一交流变换器信号连接。  The wind power generator grid adaptability testing device according to claim 1, wherein the converter comprises an AC-AC converter and a controller, and the AC-AC converter is connected to a three-phase power source and a wind power The generator set is connected to the AC-AC converter signal.
8、如权利要求 7所述的风力发电机组电网适应性测试装置，其特征在于， 所述交流一交流变换器包括矩阵变换器、输入电抗组和输出电抗组，所述输入 电抗组的电抗分别对应串接在该矩阵变换器的各相输入端，所述输出电抗组的 电抗分别对应串接在该矩阵变换器的各相输出端。  The wind power generator grid adaptability testing device according to claim 7, wherein the AC-to-AC converter comprises a matrix converter, an input reactance group and an output reactance group, and the reactances of the input reactance groups are respectively Correspondingly connected to the input terminals of each phase of the matrix converter, the reactances of the output reactance groups are respectively connected in series with the output ends of the respective phases of the matrix converter.
9、如权利要求 8所述的风力发电机组电网适应性测试装置，其特征在于， 所述变流器包括输入电容组和输出电容组，所述输入电容组的电容连接在所述 交流一交流变换器的输入端两相之间，所述输出电容组的电容连接在所述交流 一交流变换器的输出端两相之间。  The wind power generator grid adaptability testing device according to claim 8, wherein the converter comprises an input capacitor group and an output capacitor group, and a capacitance of the input capacitor group is connected to the AC-AC. Between the two phases of the input of the converter, the capacitance of the output capacitor bank is connected between the two phases of the output of the AC-AC converter.
10、如权利要求 1至 9之一所述的风力发电机组电网适应性测试装置，其 特征在于，所述功率半导体开关器件为绝缘栅双极晶体管，门极可关断晶闸管， 集成门极换流晶闸管之一或其组合。  The wind power generator grid adaptability testing device according to any one of claims 1 to 9, wherein the power semiconductor switching device is an insulated gate bipolar transistor, the gate can turn off the thyristor, and the integrated gate is replaced. One of the flow thyristors or a combination thereof.
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