Overall and selective compensation of harmonic currents in Active Filter applications

Abstract

This paper describes two harmonic detection methods used in industrial shunt Active Filters. The methods are overall harmonic compensation and selective harmonic compensation. Both methods are described and analyzed in the paper together with several practical design steps for Adjustable Speed Drives applications. The methods are compared in the case of voltage unbalance and predistortion, common cases in industrial applications. The paper concludes with guidelines of using each method in different cases.