During power generation period of DFIG at grid connection

the high frequency harmonic contents of the grid current will be increased by the non-linear switch of converter and ideal filtering result is not easy to be achieved by general type L filter. In recent years

a kind of new type LCL filter is proposed by some scholars which

compared to type L filter

has smaller volume

smaller loss and better result of eliminating harmonics. However

type LCL filter is a higher order system with complicated control design and resonance generation. As for above shortcoming

in this paper a kind of proportional res-onance control strategy and capacitive current feed control method based on LCL active damping filter is proposed so simplify the control system and suppress harmonics of the control system. The simula-tion model is set up in MATALAB/Simulink software is set up and above control strategy is simulated and verified. And the correctness of above control method is proved by the simulation and experimental waveform.