A novel voltage control for active shunt power filters

In this paper a new voltage control for shunt active power filters is presented. The proposed system is able to compensate one harmonic current flowing into the electric network without the need for measuring the non linear load current, or supply line current. Only the line voltage is measured. The developed control sets, by means of a genetic algorithm, the suitable values of amplitude and phase of the harmonic compensating current used as reference signal for a carrier modulated PWM voltage source inverter. Simulation tests carried out using Simulink and the Power System Blockset, show the reliability and the effectiveness of the compensation action.