Study of single phase shunt active power filter

Abstract

The use of power electronic devices is increased enormously. And this leads to very low power factor in the power system. Also harmonics are caused by these power electronic devices. Active power filter is a method to reduce harmonics and improve the power factor. This report is intended to provide a method to filter the harmonics and improve the power factor. All goals, design procedures, conclusions are within the report. By this by switching the suitable PWM modulator pulse we can reduce the any no. of harmonics. Mostly 3rd harmonics are present in the power system. Simulation results are also shown which shows that elimination of harmonics can be done with this method. Hybrid Active Power Filter (HAPF) has been proposed to overcome the disadvantages of APF and PF. It is a combined system of PF and APF. Appropriate choice of passive filters and detailed design method for the same is being presented in this thesis, which when combined with APF will eliminate the higher order harmonics.