中文摘要：

对用鼠笼式感应发电机发电的恒速风力机和用双馈感应发电机发电的变速风力机的工作原理及其在电网的接入方式、接入风力发电机后的电网电压和功率进行了分析，对不同风电穿透力下电压对风速扰动的响应进行了讨论，并对电网故障时电压变化及风电场低压穿越技术进行了研究。采用理论分析与计算机仿真方法得到了相关结论：不同风力机机型对电网的作用不同；鼠笼式风电机组构成的风电场穿透功率大于10％以后会引起公共连接点处电压偏移超过10％：电网故障后双馈风电机组和鼠笼式风电机组电压恢复能力，不同，在风电场加入STATCOM后，可以实现低电压穿越。

英文摘要：

The working principle of constant speed wind power generator adopting squirrel-cage induction generator （SCIG） and that of variable speed wind power generator adopting doubly-fed induction generator （DFIG） and the modes connecting them with power grid as well as the voltage and power of power grid connected with wind power generators are analyzed. The response of voltage to wind speed disturbance under different wind power penetrability, the voltage variation under power grid faults and the low voltage fault ride-through ability are researched. By means of theoretical analysis and computer simulation, following results and relevant conclusions are obtained： different kinds of wind power generators make different effect on power grid; when power penetration of wind farm consisting of SCIGs is more than 10%, the voltage deviation at common connection point will exceeds 10%; the voltage restoration ability of DFIG and that of SCIG after power grid fault are different, and low voltage fault ride-through can be implemented by appending STATCOM to wind farm.