HORIZONTAL AXIS WIND TURBINE DYNAMIC SIMULATION BASED ON LQG CONTROLLER

Abstract

Nowadays the energy production by wind turbines has been increasing because its production is environmentally friendly; therefore the technology developed for the production of energy through wind turbines brings great challenges in the investigation. The system is studied under nominal conditions by means nominal wind power and maximum pitch angle. A sensitivity analysis is implemented to study the system performance at the design margins of different parameters like wind speed, tip speed ratio and pitch angle.
The paper deals with the modeling and power control of horizontal variable speed wind turbines using an enhanced LQG controller. The proposed LQG controller is designed to realize a compromise between the maximum-power-point generation under randomized wind energy condition changes. The effectiveness and robustness of the proposed control approach are proven by numerical simulations. LQR is a conventional controller is built and the system performance is studied and compared with LQG. The results confirms that the proposed LQG controller success to maintain the output power equal or close to the rated value at different operating conditions while LQR is not. The LQG protects the wind turbine system from wind storms and force the system for shuts down.