Automated Design and Implementation of Resonant Controllers for Current Control of Shunt Active Filters

This paper presents the automated design of resonant controllers for current control of three phase shunt active filters. The design methods employs a Genetic Algorithm (GA) based routine. The resonant control compensator is introduced in order to improve the control accuracy and performance for AC input signals. An accurate harmonic current control for shunt active filters can be achieved using resonant compensators. In this paper, the current control system is designed to operate with a single dq reference frame, synchronous with the 50 Hz supply voltage, for the compensation of all main harmonic currents, 5th, 7th, 11th and 13th. The design procedure and the principle of the proposed control method are presented. Experimental results confirm the accuracy and effectiveness of the GA-designed compensators, showing excellent harmonic current tracking performance.