PHC CONTROL METHOD FOR SHUNT ACTIVE POWER FILTERS IN THREE-PHASE FOURWIRE SYSTEMS

This paper describes the Control method of calculating the reference currents for shunt active power filters under different load conditions. In PHC method was applied to a three-phase four wire system in order to reduce harmonics present in the source current .When the non- linear load connected across the source, source current getting harmonics, due to the harmonics load heated very short time so to avoid this problem to reduce the harmonics present in the source current . This compensation method will generate un- compensating current to compensate the source current. These methods produce more optimal solution based on the MATLAB simulation.