Study on high-frequency hybrid active power filter

Aiming at the poor and vulnerable performance of passive power filter,a MOSFET available high-frequency hybrid active power filtering scheme was proposed. Based on the existing passive power filter,a single-tuned hybrid active power filter was added to filter the high-frequency current harmonics pertinently. According to the basic principle of filtering system,the harmonic current gain and system double loop controller were analyzed and designed. Simulation investigation was done and a prototype was built. The results indicate that the system filtering performance is significantly improved,filtering bandwidth is widened,resonance is inhibited and the capacity of the active power filter in the proposed system is very low.