风电机组变流器发电机系统的共模研究

本文通过对双馈风力发电机组的变流器-发电机系统的共模研究,阐述了双馈机组共模电压的产生机理,分析了变流器-发电机系统的主要共模流通路径,建立了系统的共模等效电气模型。并在现有条件下采用解析计算法、有限元仿真和阻抗分析仪测试共三种方法获得关键的模型参数。并选取了实际风场的参数进行了验证。

This paper studies the common mode of the convertor-generator system in double-fed wind turbine,elaborates the mechanism of the double-fed wind turbine’s common voltage,analyses the common mode current path of convertor-generator system and builds the common mode equivalent electrical model of the system.Use analytical calculation method,finite element simulation and impedance analyzer test to get the key model parameters.Verify it according to the parameters from a real wind farm.