Low Voltage Ride Through solution for Doubly Fed Wind-Power Induction Generator and experimental validation

Low Voltage Ride Through (LVRT) technology of Doubly Fed Wind-Power Induction Generator (DFIG) is a very important issue for grid-connection of wind power system. The paper analyzed and simulated dynamic response of DFIG under gird voltage dip. Aiming at this problem, the paper proposed a whole set of LVRT control strategies for DFIG and designed a control logic diagram for the above strategies. In order to validate the effectiveness of the strategies, this paper carried out a detailed experimental validation on a 22KW DFIG driving system test platform, which was connected to a voltage-dip generator. The experimental waveforms indicated that the proposed control strategy could effectively implement LVRT under different dip depth and time.