并网型异步风电机组的低电压穿越性能分析

Analysis on Low Voltage Ride-through Characteristics for Grid-based Asynchronous Wind Turbine

为了分析并网型异步风电机组低电压穿越的性能,文中给出了异步风电机组和无功补偿装置(STATCOM)的模型,建立了风电场仿真系统模型,分别仿真了采取改善措施(在汇流母线处加装STATCOM)前后两种并网型异步风电机组低电压穿越的性能并进行了对比分析。得出结论:鼠笼式异步风电机组低电压穿越能力较弱,双馈式异步风电机组低电压穿越性能优越;采取一定改善措施后可以明显提高两种机组的低电压穿越性能,尤其是对鼠笼式异步风电机组改善最为明显。

In order to analyze Low vohage ride through （LVRT）performance of grid-based asynchronous wind turbine, this paper built the grid-based asynchronous wind turbine model and the reactive power compensation devices （STATCOM） model; established a wind farm simulation system model; respectively analyzed the LVRT performances of the grid-based asynchronous wind turbine with and without the improvement measures （STATCOM installed at bus rod）. The conclusion was that： the doubly-fed induction wind turbine had a better LVRT performance than squirrel- cage induction wind turbine and the performance could be improved by taking certain measures, especially for the squirrel-cage induction wind turbine.