| 双馈风电机组低电压穿越的Crowbar优化控制策略分析 |
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| 引用本文： | 王继飞,李培强,李欣然,顾振,邱时严.双馈风电机组低电压穿越的Crowbar优化控制策略分析[J].中国电力,2015,48(11):103-109. |
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| 作者姓名： | 王继飞 李培强 李欣然 顾振 邱时严 |
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| 作者单位： | 1. 湖南大学 电气与信息学院，湖南 长沙 410082； 2. 国网张家口供电公司， 河北 张家口 075000 |
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| 基金项目： | 国家自然科学基金资助项目（51277055) |
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| 摘 要： | 双馈风电机组的低电压穿越通常采用在转子侧加撬棒保护电路（Crowbar）的方法。为有效评估双馈风电机组的故障暂态行为，首先分析了电网故障期间撬棒投入后的机组定转子电流特性，讨论了撬棒阻值的取值范围。在此基础上，以PSCAD/EMTDC为平台，建立包含撬棒保护电路的双馈风力发电机组模型，分析了2种撬棒控制策略下的机组动态响应，提出了一个评价机组动态响应的指标函数，对仿真结果比较分析，得出了双馈风电机组在不同电压跌落情况下实现低电压穿越的撬棒优化控制策略。
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| 关 键 词： | 双馈异步风力发电机 低电压穿越 暂态特性 Crowbar 直流卸荷电路 |
| 收稿时间： | 2015-06-02 |
Analysis on Low Voltage Ride Through of Doubly Fed Induction Generator with Different Crowbar Control Strategy |
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| WANG Jifei,LI Peiqiang,LI Xinran,GU Zhen,QIU Shiyan.Analysis on Low Voltage Ride Through of Doubly Fed Induction Generator with Different Crowbar Control Strategy[J].Electric Power,2015,48(11):103-109. |
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| Authors: | WANG Jifei LI Peiqiang LI Xinran GU Zhen QIU Shiyan |
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| Affiliation: | 1. College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;2. State Grid Zhangjiakou Power Supply Company, Zhangjiakou 075000, China |
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| Abstract: | The crowbar protection circuit is frequently adopted to implement low voltage ride through (LVRT) of the grid-connected doubly fed induction generator(DFIG). In order to effectively evaluate DFIG transient behavior, the stator and rotor short-circuit characteristics after crowbar switched in during a grid fault is analyzed in detail. The range of crowbar resistance is also discussed. The DFIG modal containing crowbar protection circuit is built up in PSCAD/EMTDC. An evaluation index function of dynamic response is presented. The analysis of simulation results reveals optimal crowbar control strategies for LVRT under different grid voltage drop. |
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| Keywords: | doubly fed induction generator low voltage ride through transient characteristics crowbar circuit DC voltage circuit |
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