风电场联络线短路电流特性的研究  

Characteristics of short circuit current of output transmission line of wind farm

作　　者：徐岩[1] 卜凡坤[1] 赵亮[1,2] 杨超楠 刘国平[1,2] 

机构地区：[1]华北电力大学,河北保定071000 [2]石家庄供电公司,河北石家庄050021 [3]江苏省电力公司检修分公司,江苏徐州221000

出　　处：《电力系统保护与控制》2013年第13期31-36,共6页Power System Protection and Control

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.

关 键 词：风力发电 双馈发电机 电网故障 故障分析 电流特性 

分 类 号：TM713[电气工程—电力系统及自动化] TM614