电网技术2017，Vol.41Issue(2)：521-528,8.DOI:10.13335/j.1000-3673.pst.2016.0789
故障后转子侧变流器不间断控制下的双馈风机序网等值电路
Equivalent Sequence Circuit of DFIG Wind Turbines With Uninterrupted Control of Rotor Side Converter After Faults
摘要
Abstract
To conduct fault analysis and short-circuit calculation for DFIG (doubly-fed induction generator) wind power system conveniently using equivalent circuit method, a sequence network circuit model of DFIG wind turbines with rotor side converter (RSC) control during faults is proposed in this paper. With uninterrupted RSC control, DFIG stator fault current contains a steady ac-component at power frequency, two transient ac-components decaying with different time constants near power frequency, and a damping dc-component. Equivalent sequence circuits for each ac-component are derived. It indicates that equivalent circuits for steady positive and negative sequence ac-components can be described as equivalent potential with a positive sequence reactance and a passive negative sequence reactance respectively, while equivalent circuit for transient ac-components can be described as two controlled current sources. Based on the proposed sequence circuit model, short-circuit current flowing in DFIG wind power system can be calculated analytically without need of simulation. The proposed analytic method is validated with PSCAD simulation.关键词
双馈风电机组/变流器控制/序网电路/短路电流/解析计算Key words
DFIG/converter control/sequence network circuit/short-circuit current/analytic calculation分类
信息技术与安全科学引用本文复制引用
张金华,张保会,郝治国,陈琳浩,都劲松,舒进..故障后转子侧变流器不间断控制下的双馈风机序网等值电路[J].电网技术,2017,41(2):521-528,8.基金项目
国家自然科学基金资助项目(51277143)。 Project Supported by the National Natural Science Foundation of China (51277143) （51277143）
