Variable Speed Control For A Two-Mass Wind Turbine System

Norizan, Mohd Syamim Asraf (2019) Variable Speed Control For A Two-Mass Wind Turbine System. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Wind power is a potential free energy resource that had a rapid growth in the world since the 1990s due to the limited amount of fossil fuel resources. A wind turbine system (WTS) transforming electrical energy from the kinetic energy and consists primarily of an aeroturbine that converts wind energy into mechanical energy, a gearbox that reduces the torque and increases speed, and a generator used to convert electrical energy from the mechanical energy. The objective of this project is to design a variable speed control to maximize the output power from wind turbine. Beforehand, a model of two-mass wind turbine system is developed. For a variable wind turbine, the control approach is required on controlling the speed rotor to get the optimum value of tip-speed-ratio a precise dynamic model. By control the wind speed of the rotor, the aerodynamic power is extracted from the wind by the blades. In low or moderate winds, the generator torque is required and the resulting rotor speed to controlled so that allow the wind turbine to operate and maximize efficiency. The established wind turbine dynamics neglect the stiffness as an integrator to the system. The proportional-integral (PI) controller is therefore designed to extract the maximum power point of a wind turbine system (MPPT) of variable speed. The MPPT is available for the wind power conversion system and is used for small and large systems. The design assumption is made to ensure that the PI controller only operates in the partial load area. The results of the numerical simulation are presented and analysed. The result indicates that the speed rotor and maximum output power are smoothly regulated.

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