Adaptive Current Control with PI-Fuzzy Compound Controller for Shunt Active Power Filter

Abstract EN

An adaptive control technology and PI-fuzzy compound control technology are proposed to control an active power filter (APF).

AC side current compensation and DC capacitor voltage tracking control strategy are discussed and analyzed.

Model reference adaptive controller for the AC side current compensation is derived and established based on Lyapunov stability theory; proportional and integral (PI) fuzzy compound controller is designed for the DC side capacitor voltage control.

The adaptive current controller based on PI-fuzzy compound system is compared with the conventional PI controller for active power filter.

Simulation results demonstrate the feasibility and satisfactory performance of the proposed control strategies.

It is shown that the proposed control method has an excellent dynamic performance such as small current tracking error, reduced total harmonic distortion (THD), and strong robustness in the presence of parameters variation and nonlinear load.