Research of Injection Hybrid Active Power Filter

This paper proposed a new type active power filter with single injection circuit.The basic idea is that increasing the equivalent harmonic impedance of power network by valid control of active filter,in order to enhance the performance of passive filter and damp the resonance between the passive filter and the equivalent inductance of the power network.The passive filter of the equipment can be used for compensation reactive power as well as for harmonic elimination.The steady compensation characteristic and the damping resonance characteristic of the equipment are analyzed in detail.Theoretic analyze and experiment results have verified the feasibility and the correctness of the proposed topology.