中文摘要：

风电机组的合理建模及等值是研究风电场对电网影响的关键。本文分析了异步风电机组的数学模型，研究了发电机等值模型参数的求解方法，考虑尾流效应计算了等值机的等值风速。以PSCAD/MTDC为平台，构建了基于匣速异步发电机的风电场并网仿真模型。仿真研究了风电场的稳态运行特性及联络线路故障、频率变化、电压跌落等情况下的有功、无功、电压动态变化曲线，验证了等值方法的有效性和正确性。

英文摘要：

The reasonable model and equivalent of wind generators play a critical role in researching the impact on power system of wind farm. In this paper, the math model of asynchronous wind turbine is analyzed, the solve method of equivalent wind generators parameters is studied, then the equivalent wind speed is calculated by Jensen model. Taking PSCAD / EMTDC as a platform, the simulation model of induction generators wind farms was established, the different circumstances being earth fault occurred in tie-line, fxequency, voltage drop, simulation analyzed dynamic characteristics of wind farm bus active power, reactive power, voltage, the results shows validity and correctness of the eauivalent methods.