Simulation on Three Phase PWM Rectifier Using Space Vector Pulse Width Modulation(SVPWM)

Space vector pulse width modulation(SVPWM) is one of the most widely used control methods for three phase pulse width modulation(PWM) rectifiers because of its simple configuration and fixed switching frequency. We establish a three phase PWM rectifier model based on SVPWM by using Matlab/Simulink in synchronous rotary coordinates. The SVPWM adopts adjacent discrete vectors to track the continuous reference vector with only restraint to vectors working time rather than vectors sequence in one period during the tracking process. We also analyze the influences of different space vector sequences of the SVPWM on the harmonic wave and power factor of three phase PWM. The results indicate that the three phase SVPWM can output high quality waveform with lower reactive power component, while the two phase SVPWM has low switching frequency and fast response to be suitable for large power rectifiers.