Three-Phase Voltage Source PWM Rectifier Based on Voltage Current Double Closed-Loop Control

The network current harmonics were very high in conventional uncontrolled rectifier, the network side power factor was low and the dynamic response was slow in closed loop control in thyristor phase-controlled rectifier, a three-phase voltage source rectifier adopting the PWM technology was proposed aiming at the above problems in this paper. Simulation experiments were performed on the three-phase VSR based on the design of the double closed-loop control system of it, the obtained simulation results indicate that, compared with the uncontrolled or phase rectifier circuit, the harmonics of the input current is greatly reduced, the electric energy can flow in both directions in the three-phase VSR, it can realize the unit power factor operation in the rectification and inverter state, and can better suppress the DC side voltage fluctuation during the load mutation, so as to significantly improve the resisting disturbance ability of the system, and truly realize the high combination of green environmental protection with high efficiency and energy saving.