摘要：Through researched the doubly-fed induction generator , the problem at the fault of voltage dip is analyzed .This paper put forward the method which is same phase compensation of dynamic voltage restorer ( DVR) as control strategy to rapid compensate the fault voltage ,and then put into the Crowbar in order to limit the over current of doubly-fed induction generator in rotor side during the fault .Finally, using the Matlab/Simulink environment as the simulation platform , constructing the corresponding simula-tion model .The simulation results show that , when the drop fault of grid voltage happened , immediately put into the DVR and Crowbar device , can quickly provide voltage recovery support to stabilize the volt-age of fault , and can effectively limit over current of the rotor side , thereby ensuring the doubly-fed gen-erator is not to take off the grid , and greatly improve the ability of LVRT of doubly-fed generator .% 通过对双馈感应电机（ DFIG）的研究，分析了其在电网电压跌落故障下出现的一些问题。提出采用DVR（动态电压恢复器）的同相位补偿法控制策略以快速补偿电网故障电压，并同时投入Crowbar （转子撬棒）以限制双馈发电机转子侧在故障期间的过电流。最后以Matlab/Simulink环境为仿真平台，构建了与之相对应的仿真模型。仿真结果表明，在电网侧发生电压跌落故障时，立即投入DVR与Crowbar装置，可快速向双馈型风电场电网电压提供电压恢复支撑以稳定其在故障下的电压，且能够有效地限制转子侧的过电流，从而保证了双馈发电机的不脱网运行，进而极大地提高了双馈发电机的低电压穿越能力。
