风电机组低电压穿越能力测试中的风机故障

近年来，我国风力发电装机容量不断增长，大规模风电并网对电网的影响日益受到重视。低电压穿越能力是风电机组并网特性的重要考核指标之一，该文详细分析了目前风电机组低电压穿越能力测试所依据的标准，就标准中对风电场及风电机组低电压穿越性能的具体要求进行了分项阐述，在此基础上总结了已开展的现场低电压穿越测试中风机发生的种种故障及其原因，证明了同样机型的风电机组测试性能存在差异，而且现场试验证实了风机零部件故障也成为影响风机低电压穿越性能重要因素。

Wind Turbine Faults in the Process of Low Voltage Ride-Through Test

With increase of the wind power proportion in the grid, sufficient consideration should be given to the influ- ence of the large-scaled wind farms connected on the safety operation of the grid. Low voltage ride through（LVRT） behavior is a key index in the grid-integration evaluation for wind turbines. This paper presents an in-depth analysis on the current standard for testing the LVRT capacity of wind turbines, and elaborates the specific requirements of the standard. On this basis, all sorts of wind turbine faults and their causes are summarized, showing that the test performance of the same type wind turbine may vary. In addition, the on-site test verifies that failure of the wind turbine component also has significant influence on the LVRT behavior.