Power quality improvement of self- excited induction generator using Multipulse AC-DC converters - A comparison

Abstract

This paper presents the comparison between multi pulse AC-DC converters for improving the power quality in wind driven self-excited induction generator. This paper applicable for improving power quality by regulation of voltage and frequency of an isolated wind power generation based on a capacitor excited asynchronous generator and feeding to a grid. The 12/18/24 pulse AC-DC converter is designed and developed for harmonic current reduction to meet the power quality requirements. For an effective harmonic mitigation DC ripple reinjection is used. The proposed AC-DC converter is able to eliminate up to 21st harmonics in the supply current. A set of power quality indices on input AC mains and on the DC bus for a SEIG fed from different AC-DC converters .The complete electromechanical system is modeled and simulated in MATLAB using Simulink. The simulated results are presented and compared with each other and also compared with the conventional six pulse converter regulating voltage and frequency of SEIG driven by wind turbine.