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VSCF-DFIG在电压瞬间跌落情况下的应对策略
引用本文:李建林,许鸿雁,梁亮,赵斌,许洪华.VSCF-DFIG在电压瞬间跌落情况下的应对策略[J].电力系统自动化,2006,30(19):0-0.
作者姓名:李建林  许鸿雁  梁亮  赵斌  许洪华
作者单位:1. 中国科学院电工研究所,北京市,100087
2. 河北理工大学资源与环境学院,河北省唐山市,063009
基金项目:国家高技术研究发展计划(863计划)资助项目(2003AA512022-2).
摘    要:变速恒频(VSCF)双馈感应发电机(DFIG)在电网电压跌落的情况下,通过连接在转子绕组上的电阻来为电压跌落期间在转子侧产生的浪涌电流提供一条通路,从而达到限制转子回路最大电流的目的。在电网需要时,快速向电网提供无功功率,调节电网电压和稳定弱电网。通过保持系统稳定性,减少电压崩溃的危险,降低电网解列的影响。所有结果通过了仿真验证。

关 键 词:变速恒频(VSCF)  双馈感应发电机(DFIG)  电压跌落  低压旁路    Crowbar电路
收稿时间:1/1/1900 12:00:00 AM
修稿时间:1/1/1900 12:00:00 AM

Strategy To Cope with the VSCF-DFIG During Voltage Dip
LI Jianlin,XU Hongyan,LIANG Liang,ZHAO Bin,XU Honghua.Strategy To Cope with the VSCF-DFIG During Voltage Dip[J].Automation of Electric Power Systems,2006,30(19):0-0.
Authors:LI Jianlin  XU Hongyan  LIANG Liang  ZHAO Bin  XU Honghua
Affiliation:1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China;2. Heibei Polytechnic University, Tangshan 063009, China
Abstract:The paper proposes a method for a variable speed constant frequency wind turbine with doubly-fed induction generator (DFIG) to stay connected to the grid during grid faults. The key of the method is to limit the inrush current in the rotor in order to protect the converter and to provide a bypass for this current via a set of resistors that are connected to the rotor windings. In order to regulate network voltage, stabilize weak network, the DFIG using the proposed method can supply reactive power fast, hold system supply stability, reduce risk of voltage collapse and network splitting. All this has been verified by simulation.
Keywords:variable speed constant frequency (VSCF)  doubly-fed induction generator (DFIG)  voltage dip  low voltage bypass  Crowbar circuit
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