Vector Control Of Wind Driven Self Excited Induction Generator Connected To Grid Using Twenty Four Pulse AC-DC Converter Employing Pulse Doubling Technique

Abstract

This paper deals with multipulse AC-DC converters for improving the power quality in vector-controlled wind driven self excited induction generator at the point of common coupling. These multipulse AC-DC converters are realized using a reduced rating autotransformer. Moreover, DC ripple reinjection is used to double the rectification pulses resulting in an effective harmonic mitigation. The proposed AC-DC converter is able to eliminate up to 21st harmonics in the supply current. The effect of load variation on Vector Controlled Self Excited Induction Generator(VCSEIG) is also studied to demonstrate the effectiveness of the proposed AC-DC converter. A set of power quality indices on input AC mains and on the DC bus for a VCSEIG fed from different AC-DC converters .The complete electromechanical system is modeled and simulated in MATLAB using Simulink and simpower system block set. The simulated results are presented and compared for regulating voltage and frequency of SEIG driven by wind turbine.

Keywords: Autotransformer, Multipulse AC DC converter, DC ripple reinjection, Pulse doubling, VCSEIG.