考虑磁路饱和及集肤效应的异步风力发电机组暂态性能分析

为准确分析异步发电机不同详细模型对大型风电机组暂态性能的影响,该文结合2个质量块的风力机传动链等效模型,分别建立了笼型异步发电机考虑主磁路、定转子漏磁路饱和以及集肤效应影响的风电机组数学模型。针对大型风电机组在机械大扰动和电网电压骤降情况下,利用Matlab/Simulink平台对机组在不同数学模型描述时的暂态过程进行了仿真比较。结果表明,尤其在电网电压骤降时,电机磁路饱和对机组暂态运行性能的影响较为显著。

TRANSIENT PERFORMANCES ANALYSIS OF WEND TURBINE SYSTEM WITH INDUCTION GENERATOR INCLUDING FLUX SATURATION & SKIN EFFECT

In order to analyze correctly the effect of different models for induction generators on the transient performances of large wind power generation, Wind turbine driven squirrel cage induction generator (SCIG) models taking into account both main and leakage flux saturation and skin effect were proposed.A two-mass lump equivalent model of a wind turbine shaft system was also used to considering shaft flexibility.Hie transient behaviors of the wind generator system with the different models were investigated and compared with the software platform Matlab/Simulink, under conditions of a large mechancical disturbance and a grid voltage sag, respectively.Simulation results have shown that the effect of the flux saturation is obvious on the transient behavious of the wind power generator system, especially for a grid voltage sag studies.