가변구조제어를 이용한 대체에너지용 인버터 시스템 = Inverter System for Alternative Energy using Variable Structure Control

다국어 초록 (Multilingual Abstract)

This paper proposes the instantaneous control method, structure and characteristics of inverter system for alternative energy. The variable structure control and adaptive parameter estimation is applied to this system. which realizes following function; ① the synchronization of phase, frequency and amplitude between inverter voltage and utility voltage at stand-alone mode ② the synchronization of phase between inverter current and utility voltage at utility voltage at utility interactive-mode. To reduce chattering problem of variable structure control smooth function is used. The result of simulation and experiment shows the effectiveness of proposed control scheme and equivalent circuit; the good performance, robustness of the proposed control structure. and the reduction of THD in the inverter output.