电网短路故障对并网双馈风电场的影响

Impact of Short Circuit Fault on Grid Connected Operation of Doubly Fed Induction Generator Wind Farm

分析了电网发生短路故障对并网运行风电场的影响。从双馈风电机组的单机模型出发,研究了由双馈风电机组构成的风电场单机等值方法。在仿真软件EMTP-RV中搭建了包含双馈风电机组构成的风电场电力系统模型。分析了电网发生三相接地短路和单相接地短路故障时,风电场的有功功率和无功功率输出特性、并网公共连接点母线电压波动以及系统频率等暂态变化。研究结果对未来风力发电工程的建设有参考价值。

In order to study the impact of short circuit fault on grid connected operation of wind farm, the equivalent method of wind farm, which consisted of doubly fed induction generators （DFIG）, was analyzed based on the Single model of DFIG. The power system model including a DFIG wind farm was built up by EMTP-RV. And this paper also investigated the characteristics of grid connected operation of DFIG wind farm, such as the output characteristics of active power and reactive power under the condition of single-phase short-circuit and three-phase short-circuit of power system, the bus voltage fluctuation at the public connection point of grid and the transient change of system frequency. The result has an important guiding significance and reference value for the project construction of wind power in the future, as well as the wind farm in operation.