Analytical evaluation of the total harmonic current in three phase voltage and current source converters

To facilitate the design of ac side filters, this work gives analytical expressions for the root mean square value of the total harmonic phase currents in voltage and current source converters depending on the modulation schemes and passive filter components. Novel equations were found for the calculation of total harmonic phase currents regarding the CSC with LC filter. The results are verified by appropriate measurements for selected PWM schemes and are valid for most common applications.