Enhanced Active Power Filter Action for Renewable Power Generation Systems

Sayini Harish Naidu, Narra Narender Reddy

Abstract: An active power filter implemented with a four-leg voltage-source inverter using a predictive control scheme is presented. The application of a four-leg voltage-source inverter allows the compensation of current harmonic components, as well as unbalanced current generated by single-phase nonlinear loads. A detailed simple mathematical model of the active power filter, including the effect of the equivalent power system impedance, is derived and used to design the predictive control algorithm. The compensation performance of the proposed active power filter and the associated control scheme under steady state and transient operating conditions is demonstrated through simulations and experimental results.

Keywords: Active power filter, current control, four-leg converters, predictive control