中文摘要：

研究了含异步机风电场的配电网发生故障时，风电场提供的短路电流特性。从理论上推导了含风电的配电网故障电流关系式，并结合风电场提供的短路电流特性对其特点进行了分析。以PSCAD为平台，构建了典型含风电的配电网仿真模型，在分析故障电流计算式的基础上，仿真研究了风电场接入位置、风电场容量及故障点对配电网故障电流和对保护的影响。研究表明，风电接入配网将影响配网保护的动作特性：风电场容量、接入位置、故障点不同，对保护的影响也不同。

英文摘要：

The characteristics of short-circuit current offered by asynchronous wind farm connected with distribution network during the faults occurred in the distribution network are researched. The relational expression of fault current in the distribution network containing wind farm is derived theoretically, and combining with the characteristics of short-circuit current offered by the wind farm the features of the fault current in distributien network are analyzed. A simulation model of typical distribution network containing wind farm is built on the platform of PSCAD/EMTDC, and based on analysis on calculation formula of fault current the impacts of the capacity of wind farm, its network-connected position and fault point on fault current in distribution network and protective relaying are researched by the built model. Research results show that the action performances of protective relayings for distribution network are impacted by the connection of wind farm with distribution network; impacts of wind power capacity, its network-connected position and different fault points on protective relaying differ ~om one another.