电力系统及其自动化学报2017，Vol.29Issue(4)：1-6,6.DOI:10.3969/j.issn.1003-8930.2017.04.001
考虑撬棒保护的双馈风力发电机定子短路电流计算
Calculation of DFIG Stator Short-circuit Current Considering Crowbar Protection
摘要
Abstract
It is known that doubly fed induction generator (DFIG) is widely used in wind generation system,and when the grid voltage drops,the crowbar circuit of DFIG should be put into operation to prevent the overcurrent of rotor circuit,which may threaten the safety of the converter.By taking into account the influences of pre-fault active power,reactive power and crowbar circuit on the transient characteristics of DFIG,the vector forms of DFIG equivalent circuit are analyzed in different coordinate systems,and the expressions of stator short-circuit current are deduced under symmetric and asymmetric faults,which can avoid solving complex differential equations.Besides,the factors influencing the stator short-circuit current after faults and the effect of crowbar circuit on the steady stator short-circuit current are analyzed.Finally,simulations are carried out in Matlab/Simulink to verify the validity and accuracy of the expressions of stator short-circuit current.关键词
双馈风力发电机/撬棒电路/定子短路电流/定子磁链/转子磁链Key words
doubly fed induction generator (DFIG)/crowbar circuit/stator short-circuit current/stator flux/rotor flux分类
信息技术与安全科学引用本文复制引用
李斌,王欣,赵黎丽,李明浩..考虑撬棒保护的双馈风力发电机定子短路电流计算[J].电力系统及其自动化学报,2017,29(4):1-6,6.基金项目
国家优秀青年科学基金资助项目(51422703) （51422703）
贵州电网公司科技资助项目(K-GZ2014-075) （K-GZ2014-075）
