Evaluations of two methods to clean utility line: PWM-voltage source rectifiers and active power filters
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Two methods to solve harmonic pollution problems caused by the diode rectifier are possible: one replacing the diode rectifier with a PWM rectifier and the other connecting an active power filter to the diode rectifier. Despite numerous publications for two converters, the features and evaluations between them have not been clearly explained. This paper, in detail, presents a theoretical analysis and a systematic comparison of the two converters, from the point of view of converter kVA ratings, dc bus voltage requirements, switch ratings, and reactive component designs.