Output power leveling of wind turbine generator for all operating regions by pitch angle control

Abstract—Wind energy is not constant and windmill output is proportional to the cube of wind speed, which causes the generated power of wind turbine generators (WTGs) to fluctuate. In order to reduce fluctuation, different methods are available to control the pitch angle of blades of windmill. In a previous work, we proposed the pitch angle control using minimum variance control, and out-put power leveling was achieved. However, it is a controlled output power for only rated wind speed region. This paper presents a con-trol strategy based on average wind speed and standard deviation of wind speed and pitch angle control using a generalized predic-tive control in all operating regions for a WTG. The simulation results by using actual detailed model for wind power system show the effectiveness of the proposed method. Index Terms—Generalized predictive control, output power fluc-tuation, pitch angle control, wind turbine generator (WTG). I