A novel active power filter for harmonic suppression and reactive power compensation

A novel hybrid active power filter that can provide reactive power compensation while eliminating the harmonics effectively is proposed. The proposed one combines the series resonant injected active power filter with passive power filter. In this system, groups of single tuned filter that can suppress some special order harmonic are adopted as passive component. In its active component, coupling transformer is firstly connected with single tuned filter to make series resonant injected active power filter, and then connected in parallel with passive component. Principles of operation are also discussed in this paper. Finally, results of industrial application are given to verify that the proposed system has good characteristic of reactive power compensation and harmonic suppression.