The article from the friendliness of power grid,analyzed the doubly-fed induction generator(DFIG)operation states,reactive power capacity and reactive power limit,the research about Low Voltage Ride-Through (LVRT) capability,from the point of reactive power support.Focus on the voltage drop occurs,the capacity of providing reactive power to the power grid,when DFIG in various operation states,according to the simulation data to make specific analysis and judgment,from a new view to study the capacity of wind power system of LVRT and power grid.%从电网的友好性出发,分析了双馈发电机(DFIG)的运行状态、无功能力、以及无功功率极限,从无功支持的角度研究了双馈风力发电机组的低电压穿越(LVRT)能力.重点研究当电网电压发生跌落时,DFIG在各种运行状态下向电网提供无功功率的能力,根据仿真数据作出了具体的分析和判断,从一个全新的角度研究了风力发电系统的低电压穿越能力和电网的稳定能力.
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