摘要
为了对包含双馈感应风力发电机风电场的联络线保护进行研究,有必要对联络线发生故障时的短路电流特性进行分析。对于联络线对称短路故障,利用双馈风力发电机定、转子磁链的暂态变化机理,推导了双馈风力发电机组在联络线远端和近端故障情况下的定子暂态电流解析表达式。对于不对称短路故障,通过利用对称分量法和双馈感应风力发电机简化正负序等效电路,定性地分析了联络线发生不对称故障时的短路电流特性。仿真结果表明含双馈感应风力发电机的风电场联络线短路电流特性与常规电力系统短路电流特性有明显差别。
In order to study output transmission line relay of the wind farm based on doubly fed induction generator （DFIG）, it is necessary to evaluate the short circuit current characteristics of output transmission line. For the symmetric fault of output transmission line, by using the transient principle of the stator and rotor flux ofa DFIG, the expressions of the stator transient currents of the DFIG wind generation system are derived under both the far terminal fault and near terminal fault. For the asymmetric fault of output transmission line, by using the symmetrical component method and the simplified equivalent circuit of a DFIC~ short circuit current characteristics are analyzed qualitatively. The simulation results demonstrate that short circuit current characteristics of output transmission line of the wind farm based on DFIG are different from that of a normal bulk electric power system.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2013年第13期31-36,共6页
Power System Protection and Control
关键词
风力发电
双馈发电机
电网故障
故障分析
电流特性
wind power
doubly fed induction generator
grid fault
fault analysis
current characteristic
