Design and simulation of Fuzzy Logic Controlled Shunt Active Power Filter

Shunt Active Power Filters (SAPF) are designed and employed for improvement in power quality by compensating harmonics and reactive Power. Nowadays, due to increase in use of non-linear as well as unbalanced loads in every stages cause harmonics problems. This causes false operation of sensitive equipments, heating of conductors and affects the customer side loads. The performance of SAPF depends upon the design and characteristic of controller adopted for it. In this paper, comparison between Proportional Integral (PI) and Fuzzy Logic Controller (FLC) based SAPF operations under linear and non-linear load conditions is presented. Voltage Source Converter (VSI) is connected to Point of Common Coupling (PCC) through interface inductor and is triggered by signals from hysteresis current controller. Simulation results with PI and FLC based operations on SAPF are presented and explained.