నైరూప్య

Selective Harmonic Elimination Using Three Phase Shunt Active Power Filter

A.Ilakkia, R.Rajalakshmi

This project investigates the reduction of Total Harmonic Distortion (THD) by SAPF using Selective Harmonic Elimination (SHE) through instantaneous reactive current theory (id-iq method). The SAPF also called as ‘harmonic isolator’ is used for compensating the harmonics, for providing reactive power and for balancing asymmetrical loads. Instantaneous reactive current theory (id-iq method) is used to produce conductance command for SAPF. The voltage loop is operated by proportional integral (PI) controller. This control method provides reduced THD and the improvement of fundamental component. SHE method is used to eliminate the lower order harmonics, in this work harmonic of order 7 and 13 are eliminated, thus reducing the THD. This work is carried out by using the MATLAB 7.13 software