1230

With the rapid development of wind power, the voltage source DFIG (double-fed induction generator) has the ability to actively provide frequency and voltage support under weak grids and has attracted wide attention. However, when it is connected to the parallel-compensated weak power grid, medium and high frequency resonance may occur due to the interaction of the machine and the network. In response to this problem, this paper first establishes a generator-side impedance model of a voltage source DFIG, and analyzes the resonance phenomenon in the parallel compensation grid. Then, based on the control structure characteristics of the voltage source DFIG, a resonance suppression strategy is proposed. Finally, the resonance suppression strategy is verified by simulation.