电力系统自动化Issue(5)：25-30,6.DOI:10.7500/AEPS20130326013
考虑撬棒保护动作时间的双馈式风电机组短路电流特性
Short-circuit Current Characteristic of Doubly Fed Induction Generator Considering Crowbar Protection Insertion Time
摘要
Abstract
The activation of Crowbar protection and its action time both have impacts on the short-circuit current characteristics of doubly fed induction generator(DFIG).Nowadays,most studies assume the instantaneous activation of Crowbar protection after the occurrence of voltage sag.However,in practice,the Crowbar protection acts with different time delay depending on the severity of the voltage sag,which complicates the precise calculation of the short-circuit current.Aiming at this practical problem,this paper takes asymmetrical fault occurred at the stator terminal as an example.The fault current is divided into positive and negative sequence component in the forward and reverse synchronous rotating reference frame respectively,and the fault process is divided into two stages according to the Crowbar insertion moment.The formula of the fault currents during the fault process is derived in detail,and compared with the standard DFIG simulation model provided by MATLAB/Simulink. The comparison results validate the proposed formula and the effect of insertion time on DFIG short-circuit current characteristics.关键词
双馈感应发电机/不对称故障/撬棒保护/短路电流特性Key words
doubly fed induction generators (DFIG)/asymmetrical fault/Crowbar protection/short-circuit current characteristic引用本文复制引用
郑涛,魏占朋,迟永宁,刘欣..考虑撬棒保护动作时间的双馈式风电机组短路电流特性[J].电力系统自动化,2014,(5):25-30,6.基金项目
国家高技术研究发展计划(863计划)资助项目(2012AA050208) （863计划）
国家电网公司专项支持项目(国家电网科研〔2012〕515号)。This work is supported by National High Technology Research and Development Program of China (863 Program)(No.2012AA050208)and State Grid Corporation of China Under the Contract State Grid Research(No.515(2012)) （国家电网科研〔2012〕515号）
