Comparison of the effect of output filters on the total harmonic distortion of line current in voltage source line converter – Simulation study

Abstract

Two different output filter topologies are considered, namely the LCL-and L+LC-filter. The space vector modulation (SVM) is used to control the power switches of the converter. Design methods for both filter types are proposed. The methods are used to dimension the filter components. The performances of the filters designed are verified by simulations to meet the given line current total harmonic distortion (THD) requirement. The study reveals that the LCL-filter is more effective a filter topology in attenuating line current harmonic components than the L+LC-filter.