Generalized predictive control -based selective harmonic compensation scheme for active power filters

A high precision selective harmonic compensation scheme for active power filters (APF), which was designed by using the basic theory of generalized predictive control (GPC), is proposed in this paper. A transfer function model -based GPC strategy is adopted. The strategy can compensate the delay in detecting the harmonic. And better result of compensation for harmonic can be achieved. As the Kalman filter can detect each order harmonic separately, the compensation on delay time arouse from digital implementation is performed. The proposed scheme improves the stability of APF and the precision of harmonic compensation. The scheme proposed is valid in both single phase and three phase inverters. The effectiveness of the scheme is verified by simulation.