Analysis of a Wind Turbine with Wound Rotor Asynchronous Machine

Abstract

Currently, wind energy occupies an important position in the world, which leads to a significant increase in the demand for wind turbines. Inexpensive power converters of energy, fast microprocessors, and automatic control of technological processes have made it possible to produce a high-tech wind turbine that can work efficiently in the power system, as well as in isolated remote areas. This article discusses the analysis of an asynchronous generator connected to wind turbines, which has improved the performance of the turbine through mathematical modeling and confirmation of the results by experimental work. Also, a method has been eveloped to control the rotational speed of a generator with a wound rotor, based on the additional resistance in the rotor circuit and using a voltage rectifier and a chopper. The torque-speed characteristics of the induction generator were obtained for different rotor resistance values and similarly, characteristics of a turbine with a power of 1500 watts were obtained by pitch angle control.