Efficient performances of induction generator for wind energy utilization

Abstract

This paper highlights the induction generator efficiency as a basic factor for operating the wind turbine connected to utility grid, through AC/DC/AC converter, at its maximum power tracking. To have maximum power extracted from the wind turbine through the induction generator, the loading parameters have to be controlled in the direction of maximum efficiency of the induction generator. To analyze the effect of the generator efficiency, a simple equivalent circuit is proposed to represent the AC/DC/AC converter-grid combination as seen by the induction generator to simplify the analysis. The steady state performance of the induction generator is investigated. An accurate range of operation for the load parameters is developed. This analysis is based on the condition of operating the system not only on the maximum power extracted of the wind turbine but also on the maximum induction generator efficiency.