Fuzzy Control of Variable Speed Wind Turbine

Abstract

To maintain the optimum blade tip speed ratio in order to obtain the maximum wind energy under lower wind speed, and to store or deliver some energy in order to enhance the flexibility of gear system and get stable output of power under higher wind speed, the angular speed of wind wheel is mainly used to control the variable speed wind turbine generator system. Building the accurate mathematical model of the wind turbine generator system is very difficult because of the uncertainty of air kinetics and the complexity of power electronics. To simplify and avoid the sophisticated mathematical model, fuzzy controller was designed to control the rotation moment of wind wheel and the reverse moment of the generator. The simulation model and results are obtained. Compared with the PID controller, using fuzzy controller the variable speed wind turbine generator system can get smooth output and has better anti-interference property.