PITCH ANGLE CONTROL OF WIND TURBINE USING SLIDING MODE CONTROL

Abstract

The renewable energy is one of the best form energy which can be generated without any pollution and is best resources which lasts for very long period. In wind energy conversion systems, the unpredictability and incoherence of wind is one of the operational problems. In most cases, speed of wind can vary hastily and as the power generated from wind is directly proportional to cube of the wind speed, the power generated will increase rapidly with wind speed. But when the power reaches rated value then after that point power could not increase beyond rated value by considering the internal wiring of the turbine. So somehow we need to control the power which is more than the rated value. There are different methods of controlling the power to be at rated value but the best method of controlling is Active Regulation which means controlling the power to limit to the rated value by adjusting the pitch angle of the wind turbine blades. In this dissertation the performance of wind turbine with out controller, with PI and SMC controllers have been analysed in MATLAB simulation. It is observed that the performance of wind turbine is best when SMC is used and further PI controller gives better response then wind turbine without controller.