The study of H-bridges cascaded single-phase active power filter based on instantaneous reactive-power theory

As the pre-research of high voltage active power filter (APF), an experimental prototype of single-phase H-bridges cascaded active power filter is built based on digital signal processing chip TMS320F2812. Based on instantaneous reactive-power theory, the single-phase grid circuit is decomposed and analyzed by mathematical method and a more suitable detecting method for harmonics and reactive currents in single-phase circuit is deduced in this paper. The results of simulation and experiment show that experimental prototype can realize harmonic current compensation effectively.