DC-bus voltage control for dual PWM based on comprehensive reactive power current target

DC-bus voltage control strategy of AC-DC-AC dual PWM converter system is researched. Based on original direct current control strategy for net-side rectifier in d-q synchronous reference frame, a novel reactive power current i_q control strategy is proposed, which takes both the unity power factor and the DC-bus voltage stability together, as i_q comprehensive regulating target, using a fuzzy controller. Simulation results indicate that the reactive power current i_q dose quick up the response speed of active power current i_d, and the DC-bus control performance is improved.