A NOVEL CURRENT CONT ROL TECHNIQUE FOR TH REE PHASE SHUNT ACTI VE POWER FILTER

In this paper a novel control algorithm is implemented for three phase shunt active power filter based on adaptive hysteresis current controller. Harmonics is the predominant power quality issues which have adverse effect on the power system. The most of power quality issues in power system is created due to non linear loads. The shunt active power filter is extensively employed to elimi nate harmonic current and reactive power compensation. The performance of shunt active power filter depends on the control strategy used for the shunt active filter. Hysteresis Current Controller is widely used due to its simplicity, fast and accurate resp onse and ease in implementation but this leads to high switching losses and injects high frequency harmonic into the system due to its variable switching frequency. This paper provide the frame work for adaptive current controller SAPF which overcome the problem of hysteresis current control scheme. The proposed three phase SAPF is found to be effective which meets IEEE 519 standard recommended on harmonics levels. The simulation results, obtaining using Matlab/Simulink show the effectiveness of proposed control algorithm of the shunt active power filter