Research on Three-phase PWM Rectifier based on Double Closed-loop Feedforward decoupling control

Abstract

For rectifier link widely used traditional diode rectifier circuit and brake pipe phased rectifier circuit, resulting in net side current, voltage distortion, problem of higher harmonic and low power factor, and put forward a double closed-loop feed-forward decoupling control strategy, used in three-phase voltage source PWM rectifier was established in Matlab/Simulink simulation model, compared with traditional SVPWM control of three-phase PWM rectifier, verifies the correctness of the proposed control strategy. From the simulation results, it can be seen that the voltage on the grid side is nearly consistent with the phase of the current, which realizes the operation of unit power factor and makes the voltage on the DC side reach steady-state rapidly, thus reducing the harmonic pollution and improving the power quality, which has a good practical application effect in the power transformation.