The Suppression of Resonance by a New Hybrid Power Filter

Lots of structures of hybrid power filter are produced consisting of tuned filter and active filter. It can reduce the rating of active filter and cost of the harmonic compensators, and also can improve the compensation performance compare to the passive and active filter using alone by preventing the resonance occurring. However, the resonance still may occur under some condition. A new hybrid power filter by employing an active filter and C-type filter is proposed in this paper, which can reduce the rating of this harmonic compensator, and moreover, the resonance can be suppressed reasonable. A simulation result is presented in this paper, it proves that this kind of topology is effective on the harmonic compensation and elimination of resonance