PI & Fuzzy Controller for SHAPF using PQ & Modified PQ Theory

In modern electrical distribution system power filters are majorly used to eliminate the harmonics produced within it, one of the power filter having better dynamic performance is Active Power filter. An accurate control algorithm providing the robust performance under unbalance loads and source is the need of Active power filters. The voltage source inverters (VSI) used to get triggered because of the control methods. Hence compensation of selection of harmonics depended mainly on adopted algorithms. Any SHAPF system there are wide and various ways of implementing the control block system whose output goes to VSI gate. Further to propose the new control strategy for Shunt active power filter the harmonics and frequency has to be modelled. For the control of the active and reactive power in the two-bus power system the Matlab Simulink based implementation of the instantaneous real and reactive power theory and modified PQ theory are used. The main objective of this paper is to analyze Shunt active filter with fuzzy and Pi controller, to carry out analysis we consider pq and modified pq theory.