Analysis and Comparison of Two Real time Detection Algorithms for Harmonic and Reactive Current in Single phase Circuit

Aiming at active power filter(APF) requiring real time detection on the harmonic and reactive current,two harmonic and reactive current detection methods in single phase circuit were presented,which are based on instantaneous reactive power theory and fundamental amplitude separate.Detection principles of two algorithms were given and analyzed.Simulation results show the latter algorithm,which is of fast dynamic response and high precision,is easy to achieve.