浏览全部资源
扫码关注微信
Jiangsu Guangheng New Energy Co., Ltd., Nantong 226400, China
Received：14 August 2026，
Accepted：01 September 2026，
移动端阅览
Wentao Li, Yingchen Li. Study on Grid-Connected Stability of Squirrel-Cage Induction Wind Farm under Asymmetric Faults and Its Influence on Reactive Power Compensation Equipment[J/OL]. Power Capacitor & Reactive Power Compensation, 2026.
针对海上风电场送出线路发生不对称故障（如单相接地、两相短路）时，风力发电机组并网点电压不平衡度骤升、无功功率波动加剧、可能导致并联电容器组等无功补偿设备过电压损坏的问题，本文以如东海上风电场SWT-4.0-146型鼠笼异步风力发电机为研究对象，研究了不对称故障下全功率变流器的并网稳定性机理。首先，建立鼠笼异步发电机及其全功率变流器在三相静止坐标系、两相静止坐标系及同步旋转坐标系下的数学模型，推导负序分量对直流母线电压及并网电流的影响规律；其次，基于对称分量法分析不对称故障期间正、负序分量的耦合关系，揭示有功/无功功率二倍频波动及其对直流母线电压稳定性的影响机理；然后，在MATLAB/Simulink中搭建包含风力发电机组、LCL滤波器、并网变压器及故障点的综合仿真模型，模拟A相电压跌落至0.2pU的单相接地故障工况；最后，对比分析负序电流抑制前后的系统响应。仿真结果表明：不对称故障发生时，并网A相电流由额定值1.2 kA骤升至2.8 kA，负序电流含量达11.15 A；采用正负序分离控制后，负序电流可降至0.46 A，降幅达95.9%，直流母线电压二倍频波动被抑制在设定值的1%以内。研究表明，所提正负序解耦控制策略能有效抑制负序电流和直流母线电压波动，显著提升不对称故障下风电并网系统的稳定性，同时降低并联电容器组在故障期间的过电压风险，为海上风电场无功补偿设备的配电保护装置及故障穿越策略优化提供了理论依据。
To address the issues of a sharp increase in voltage imbalance at the grid connection point of wind turbines
intensified reactive power fluctuations
and potential overvoltage damage to reactive power compensation equipment such as shunt capacitor banks when asymmetric faults (e.g.
single-phase grounding
two-phase short circuit) occur on offshore wind farm transmission lines
this paper takes the SWT-4.0-146 squirrel-cage asynchronous wind turbine at Rudong Offshore Wind Farm as the research object and investigates the grid-connected stability mechanism of the full-power converter under asymmetric faults. First
mathematical models of the squirrel-cage asynchronous generator and its full-power converter in the three-phase stationary coordinate system
two-phase stationary coordinate system
and synchronously rotating coordinate system are established
and the influence laws of negative sequence components on DC bus voltage and grid-connected current are derived. Second
based on the symmetrical component method
the coupling relationship between positive and negative sequence components during asymmetric faults is analyzed
revealing the mechanism of double-frequency fluctuations in active/reactive power and their impact on DC bus voltage stability. Then
a comprehensive simulation model including the wind turbine
LCL filter
grid-connected transformer
and fault point is built in MATLAB/Simulink to simulate a single-phase grounding fault condition where phase A voltage drops to 0.2 pU. Finally
the system response before and after negative sequence current suppression is compared and analyzed. Simulation results show that when an asymmetric fault occurs
the grid-connected phase A current surges from the rated value of 1.2 kA to 2.8 kA
with a negative sequence current content of 11.15 A. After adopting positive-negative sequence decoupling control
the negative sequence current can be reduced to 0.46 A
a reduction of 95.9%
and the double-frequency fluctuation of the DC bus voltage is suppressed within 1% of the set value. The research demonstrates that the proposed positive-negative sequence decoupling control strategy can effectively suppress negative sequence current and DC bus voltage fluctuations
significantly enhance the stability of wind power grid-connected systems under asymmetric faults
and reduce the overvoltage risk of shunt capacitor banks during fault periods
providing a theoretical basis for the protection configuration and fault ride-through strategy optimization of reactive power compensation equipment in offshore wind farms.
WALLIN M R . 风能在中国的发展状况及其预测 [D ] . Columbus : The Ohio State University , 2010 .
李永东 , 许烈 , 马宏伟 . 风力发电系统综述 [J ] . 电气时代 , 2012 , 3 : 42 - 47 .
LI Yongdong , XU Lie , MA Hongwei . Review of wind power generation system [J ] . Electric Age , 2012 , 3 : 42 - 47 .
杨美颖 , 刘文颖 , 申自裕 , 等 . 基于改进DNE极限域的含光热发电系统风光电消纳能力的评估方法 [J ] . 可再生能源 , 2023 , 41 ( 4 ): 546 - 554 .
YANG Meiying , LIU Wenying , SHEN Ziyu , et al . Evaluation method of wind and photovoltaic power accommodation capacity of power system with concentrated solar power based on improved DNE limit domain [J ] . Renewable Energy Resources , 2023 , 41 ( 4 ): 546 - 554 .
GB/T 19963.2-2024 风电场接入电力系统技术规定 第2部分：海上风电 [S ] . 北京 : 中国标准出版社 , 2024 .
徐海亮 , 陈翔宇 , 葛平娟 . 不对称弱电网下双馈风机系统的稳定性评估及正负序虚拟转子电感控制策略 [J ] . 电力自动化设备 , 2024 , 44 ( 9 ): 49 - 56 .
XU Hailiang , CHEN Xiangyu , GE Pingjuan . Stability evaluation of DFIG system under asymmetric weak grid and positive-negative sequence virtual rotor inductance control strategy [J ] . Electric Power Automation Equipment , 2024 , 44 ( 9 ): 49 - 56 .
宋平岗 , 喻冲 . 不对称故障下双馈风力发电机转子变换器控制研究 [J ] . 大电机技术 , 2011 ( 5 ): 55 - 59 .
SONG Pinggang , YU Chong . Research on rotor converter control of DFIG under asymmetric faults [J ] . Large Electric Machine and Hydraulic Turbine , 2011 ( 5 ): 55 - 59 .
罗浩 , 刘守豹 , 曾恕嘉 . 基于STATCOM的双馈风力发电机低电压穿越能力分析 [J ] . 电工技术 , 2024 ( 10 ): 46 - 48, 52 .
LUO Hao , LIU Shoubao , ZENG Shujia . Analysis of low voltage ride-through capability of DFIG based on STATCOM [J ] . Electric Engineering , 2024 ( 10 ): 46 - 48, 52 .
吴瀚 , 徐海亮 , 张利 , 等 . 弱电网下含负序控制的双馈风机阻抗建模及关键致稳因素评估 [J ] . 高电压技术 , 2023 , 49 ( 6 ): 2516 - 2528 .
WU Han , XU Hailiang , ZHANG Li , et al . Impedance modeling and key stabilization factor evaluation of DFIG with negative-sequence control under weak grid [J ] . High Voltage Engineering , 2023 , 49 ( 6 ): 2516 - 2528 .
吕志鹏 , 盛万兴 , 钟庆昌 , 等 . 虚拟同步发电机及其在微电网中的应用 [J ] . 中国电机工程学报 , 2014 , 34 ( 16 ): 2591 - 2603 .
LYU Zhipeng , SHENG Wanxing , ZHONG Qingchang , et al . Virtual synchronous generator and its application in microgrids [J ] . Proceedings of the CSEE , 2014 , 34 ( 16 ): 2591 - 2603 .
钟庆昌 . 虚拟同步机与自主电力系统 [J ] . 中国电机工程学报 , 2017 , 37 ( 2 ): 336 - 348 .
ZHONG Qingchang . Virtual synchronous machines and autonomous power systems [J ] . Proceedings of the CSEE , 2017 , 37 ( 2 ): 336 - 348 .
王博 , 杨德友 , 蔡国伟 . 高比例新能源接入下电力系统惯量相关问题研究综述 [J ] . 电网技术 , 2020 , 44 ( 8 ): 2998 - 3006 .
WANG Bo , YANG Deyou , CAI Guowei . Review of research on power system inertia related issues in the context of high penetration of renewable power generation [J ] . Power System Technology , 2020 , 44 ( 8 ): 2998 - 3006 .
孙华东 , 王宝财 , 李志伟 , 等 . 高比例新能源接入下电力系统惯量水平评估与提升措施 [J ] . 电网技术 , 2020 , 44 ( 1 ): 37 - 45 .
SUN Huadong , WANG Baocai , LI Zhiwei , et al . Evaluation and enhancement measures of system inertia level under high penetration of renewable energy [J ] . Power System Technology , 2020 , 44 ( 1 ): 37 - 45 .
杨沛豪 , 赵俊杰 , 吴昌兵 , 等 . 超级电容储能系统在火电调频与电网支撑中的集成技术及应用展望 [J ] . 电力电容器与无功补偿 , 2026 , 47 ( 2 ): 1 - 17 .
YANG Peihao , ZHAO Junjie , WU Changbing , et al . Integrated technologies and application prospects of supercapacitor energy storage systems in thermal power frequency regulation and grid support [J ] . Power Capacitor & Reactive Power Compensation , 2026 , 47 ( 2 ): 1 - 17 .
冯浩 , 王博 , 葛树俊 , 等 . 基于VSG的光储系统参与一次调频研究 [J ] . 电力电容器与无功补偿 , 2020 , 41 ( 2 ): 1 - 7 .
FENG Hao , WANG Bo , GE Shujun , et al . Research on primary frequency regulation of photovoltaic-storage system based on virtual synchronous generator [J ] . Power Capacitor & Reactive Power Compensation , 2020 , 41 ( 2 ): 1 - 7 .
黄伟 , 熊显斐 , 陈洁 , 等 . 基于SOC自适应调节的光储联合系统VSG控制策略 [J ] . 电力系统保护与控制 , 2022 , 50 ( 15 ): 88 - 96 .
HUANG Wei , XIONG Xianfei , CHEN Jie , et al . VSG control strategy for PV-storage hybrid system based on SOC adaptive regulation [J ] . Power System Protection and Control , 2022 , 50 ( 15 ): 88 - 96 .
肖湘宁 , 罗超 , 廖坤玉 . 新能源电力系统次同步振荡问题研究综述 [J ] . 电工技术学报 , 2017 , 32 ( 6 ): 85 - 97 .
XIAO Xiangning , LUO Chao , LIAO Kunyu . Review of the research on subsynchronous oscillation issues in electric power system with renewable energy sources [J ] . Transactions of China Electrotechnical Society , 2017 , 32 ( 6 ): 85 - 97 .
张兴 , 曹仁贤 . 太阳能光伏并网发电及其逆变控制 [M ] . 北京 : 机械工业出版社 , 2011 .
ZHANG Xing , CAO Renxian . Solar photovoltaic grid-connected power generation and its inverter control [M ] . Beijing : China Machine Press , 2011 .
ZHONG Qingchang , WEISS G . Synchronverters: inverters that mimic synchronous generators [J ] . IEEE Transactions on Industrial Electronics , 2011 , 58 ( 4 ): 1259 - 1267 .
LIU Jia , MIURA Y , ISE T . Comparison of dynamic characteristics between virtual synchronous generator and droop control in inverter-based distributed generators [J ] . IEEE Transactions on Power Electronics , 2016 , 31 ( 5 ): 3600 - 3611 .
BECK H P , HAUER R . Virtual synchronous machines—Classification of implementations and analysis of equivalence to droop controllers for microgrids [C ] // 2013 IEEE Grenoble Conference . Grenoble : IEEE , 2013 : 1 - 7 .
WANG Weiyu , JIANG Lin , CAO Yijia , et al . A parameter alternating VSG controller of VSC-MTDC systems for low frequency oscillation damping [J ] . IEEE Transactions on Power Systems , 2020 , 35 ( 6 ): 4609 - 4621 .
SUUL J A , LISERRE M , RODRÍGUEZ P . Instantaneous power control of grid-connected voltage source converters under unbalanced grid faults [J ] . IEEE Transactions on Power Electronics , 2008 , 23 ( 3 ): 1218 - 1229 .
ALEPUZ S , BUSQUETS-MONGE S , BORDONAU J , et al . Control strategies for asymmetric faults in grid-connected converters [J ] . IEEE Transactions on Power Electronics , 2013 , 28 ( 6 ): 2806 - 2820 .
MUYEEN S M , TAKAHASHI R , MURATA T , et al . A variable speed wind turbine control strategy to meet wind farm grid code requirements [J ] . IEEE Transactions on Power Systems , 2010 , 25 ( 1 ): 331 - 340 .
MOHSENI M , ISLAM S M . Review of international grid codes for wind power integration: diversity, technology and a case for global standard [J ] . Renewable and Sustainable Energy Reviews , 2012 , 16 ( 6 ): 3876 - 3890 .
迟永宁 , 刘燕华 , 王伟胜 , 等 . 风电接入对电力系统的影响 [J ] . 电网技术 , 2007 , 31 ( 3 ): 77 - 81 .
CHI Yongning , LIU Yanhua , WANG Weisheng , et al . Influence of wind power integration on power system [J ] . Power System Technology , 2007 , 31 ( 3 ): 77 - 81 .
杭丽君 , 姚文熙 , 吕征宇 . 并网逆变器在电网不平衡故障时的控制策略 [J ] . 电工技术学报 , 2009 , 24 ( 8 ): 119 - 125 .
HANG Lijun , YAO Wenxi , LYU Zhengyu . Control strategy of grid-connected inverter under unbalanced grid faults [J ] . Transactions of China Electrotechnical Society , 2009 , 24 ( 8 ): 119 - 125 .
IEEE Std 1459-2010. IEEE standard definitions for the measurement of electric power quantities under sinusoidal, nonsinusoidal, balanced, or unbalanced conditions [S ] . New York : IEEE , 2010 .
曹云峰 , 蔡旭 . 全功率变流器型风力发电系统的低电压穿越技术 [J ] . 电力系统自动化 , 2013 , 37 ( 19 ): 97 - 104 .
CAO Yunfeng , CAI Xu . Low voltage ride-through technology for full-power converter wind power generation systems [J ] . Automation of Electric Power Systems , 2013 , 37 ( 19 ): 97 - 104 .
赵栋利 , 许洪华 . 鼠笼异步风力发电机组全功率变流器的研究 [J ] . 太阳能学报 , 2009 , 30 ( 8 ): 1096 - 1101 .
ZHAO Dongli , XU Honghua . Research on full-power converter for squirrel-cage induction wind turbine [J ] . Acta Energiae Solaris Sinica , 2009 , 30 ( 8 ): 1096 - 1101 .
陈坚 . 电力电子学——电力电子变换和控制技术 [M ] . 北京 : 高等教育出版社 , 2011 .
CHEN Jian . Power electronics——power electronic conversion and control technology [M ] . Beijing : Higher Education Press , 2011 .
SWT-4 . 0-146 风力发电机组产品用户手册 [Z ] . 上海 : 上海电气风电集团有限公司 , 2018 .
0
Views
0
下载量
0
CSCD
0
CNKI被引量
Publicity Resources
Related Articles
Related Author
Related Institution
陕公网安备 61010402000197