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Improvement of the Transient Performance of a Voltage-Type PWM Rectifier with Active Filtering Function

The PWM rectifier investigated in this paper operates as a rectifier that takes a nearly sinusoidal current from the AC line and at the same time, operates as an active power filter to compensate the harmonic current due to a nonlinear load connected to the same AC line. The transient performance of this rectifier is analyzed for its stable operation, focusing on the effects of parameters of the controller used. The analysis is carried out by simulation for cases of step change in the DC load of the PWM rectifier. It is shown that the transient performance is greatly improved by optimizing the controller parameters used. Experimental results are included to justify the simulation analysis.