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전압리플 평균화를 이용한 새로운 MPPT기법에 관한 연구
최해룡(Hae-Ryong Choi),고재석(Jae-Seok Gho),최규하(Gyu-Ha Choe),김훙근(Heung~Geun Kim),신우석(Woo-Seok Shin) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
Of two photovoltaic systems such as stand-alone type and utility interactive one, the utility interactive systems are so valuable for power peak-cut particularly in summer season. For the maximum power point tracking (MPPT) by which the generated energy can be maximized, many control methods have been reported up to now. To overcome the disadvantages of the conventional ones, a new MPPT algorithm is proposed which can improve both tracking ability and generating efficiency of photovoltaic system without chopper.
박준현(Jun-Hyun Park),이경주(Kyung-Joo Lee),이득기(Deuk-Kee Lee),정종진(Jong-Jin Jeong),최종우(Jong-Woo Choi),김훙근(Heung-Geun Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper describes a control scheme for direct torque and flux control of induction machines. The proposed predictive flux control scheme has directly calculated the reference voltage space vector based on flux errors in order to control the torque and flux.<br/> This proposed control scheme has not the requirement of a separate current regulator and proportional-integral (PI) control of the flux, torque, and/or current error, thereby improving transient performance and also has the advantage of less torque ripple in steady state with a fixed switching period. The effect of proposed method has been proven by simulations.