| 引用本文: | 向昌明,范立新,蒋一泉,顾天畏,顾 伟.风电场内风电机组连锁脱网机理与低电压穿越能力研究[J].电力自动化设备,2013,33(12): |
| XIANG Changming,FAN Lixin,JIANG Yiquan,GU Tianwei,GU Wei.Analysis of cascading trip-off mechanism and low voltage ride through capability of wind farm[J].Electric Power Automation Equipment,2013,33(12): |
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| 摘要: |
| 在江苏地区各风电场相关参数及低电压穿越能力测试数据的基础上，在DIgSILENT中对基于双馈风电机组的大规模风电场进行建模，可详细描述风电场内各风机低电压穿越的动态特性。在不同的电压跌落场景下，对风电场内部各风电机组的不同故障反应特性进行比较分析，确定整个风电场的低电压穿越能力并得出规律性结论。通过严重故障仿真得到风电场内部风机的脱网时序分布，分析了风机之间交互影响机理与连锁脱网的详细过程。最后，提出适当提高撬棒保护整定值、网侧变换器灵活运行和采用SVC等装置进行动态无功补偿可以提高风电场低电压穿越能力。 |
| 关键词: 风电场 建模 双馈机组 低电压穿越 撬棒保护 DIgSILENT |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（2011-AA05A107）；国家自然科学基金资助项目（51277027，509070-08）；江苏省自然科学基金资助项目（SBK201122387） |
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| Analysis of cascading trip-off mechanism and low voltage ride through capability of wind farm |
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XIANG Changming1, FAN Lixin1, JIANG Yiquan1, GU Tianwei2, GU Wei2
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1.Jiangsu Fangtian Power Technology Co.，Ltd.，Nanjing 211102，China;2.School of Electrical Engineering，Southeast University，Nanjing 210096，China
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| Abstract: |
| With the tested LVRT（Low Voltage Ride Through） data and relative parameters of wind farms in Jiangsu，a model is built in DIgSILENT for a large-scale wind farm based on doubly-fed induction generators，which describes in detail the dynamic LVRT characteristics of different wind turbines within the farm. The responses of different wind turbines to different voltage sags are compared and analyzed to evaluate the LVRT capability of the farm. The principle conclusions are summarized. The cascading trip-off sequence during a serious incident is obtained by simulation and the mechanism of interaction between turbines is analyzed to illustrate the cascading trip-off process. For enhancing the LVRT capability of wind farm，measures are proposed：properly increase the setting value of crowbar protection，flexibly operate the grid-side converter and apply SVC. |
| Key words: wind farms model buildings doubly-fed induction generator unit low voltage ride through Crowbar protection DIgSILENT |
