독립형 풍력 발전을 위한 농형 유도 발전기의 최대 출력제어 기법에 관한 연구

Abstract

Recently the development of renewable energy is gaining more interest because of the depletion of fossil fuels and the increase of the demand of electricity. Wind power generation system is an energy conversion system which harness the kinetic energy of the air and generate electricity. The rotor blades convert the kinetic energy to mechanical energy and then a generator converts the mechanical energy to electrical energy. The efficiency of the energy conversion process in a wind turbine is the most important issue like any other energy conversion devices. The purpose of this thesis proposal of maximum output control methode of stand alone wind power generator system using cage-type induction generators. For generator control, field oriented vector control is used to generate maximum output, where d-axis current control rotor flux and q-axis current control instantaneous torque. The generator speed is adjusted according to wind speed for extracting maximum power. Simulation and experimental results are shown to verify the validity of the proposed scheme.