3-Phase 4-Wire Series Active Power Filter System for Harmonics and Unbalanced Loads

고조파와 부하불평형에 대한 3상4선식 직렬형 능동전력필터 시스템

This paper introduces a control algorithm for 3-phase 4-wire series active power filter This control algorithm compensates harmonics and neutral line currents which are generated by balanced or unbalanced nonlinear loads. The advantage of this control algorithm is direct extraction of compensation voltage references. Therefor calculation time is shorten and the performance of series active power filter is improved. Compensation principle of the proposed control algorithm is presented in detail. Experimental results are shown to verify the effectiveness of tile proposed control algorithm.