Fuzzy Logic Controller based SAPF for Isolated Asynchronous Generator

Abstract

This paper deal with performance of fuzzy logic controller based SAPF (series active power filter) to voltage control of IAG (Isolated Asynchronous Generator) feeding three- phase linear and nonlinear loads. The IAG is used for constant speed prime mover type isolated power generation like biogas, biomass, diesel engine, gas turbine etc. The IAG with excitation capacitor is unable to control source voltage with loaded condition. Therefore FLC (fuzzy logic controller) based SAPF is proposed to maintain constant source and load voltages with sinusoidal currents. The PI controller based SAPF is also implemented with comparison from FLC based SAPF. The mamdani-type fuzzy logic controller does not require accurate mathematical model with improved transient performance of IAG connected system. The SAPF is modeled using IGBT (Insulated Gate Bipolar Junction Transistor) based voltage source converter (VSC) with self supported DC bus. The 7.5kW, 415V, 50Hz SEIG based generating system with SAPF is designed, modeled and simulated in MATLAB environment. The simulated results are presented to demonstrate the capability of IAG system with series voltage controller for feeding three phase resistive, reactive and nonlinear loads.