A series active power filter for harmonic voltage suppression

This paper proposes a terminal harmonic voltage compensator using a series active filter which reduces or even eliminates harmonic voltage content supplied to critical loads or consumers. Consisting of a voltage-fed PWM inverter with a LC filter, it is inserted in series between an AC supply and a load The compensation principle and theoretical analysis are described. Simulation results of an active filter, applied to a 3000 W load, are presented which validate its purpose Experimental results obtained from an active series filter prototype are shown to confirm the theory and feasibility of the proposed system.