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위상 변위제어기법을 이용한 저주파 다중레벨 스위칭 방식
우도(Yu Tao),문채주(C-J Moon),박성준(S-J Park),남해곤(H-K Nam),권순재(S-J Kwon) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, we proposed the electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and Transformers. and furthermore we suggested the new multi-level PWM inverter using PWM level to reduce THD(Total Harmonic Distortion). and we used the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.
광역 전력계통 감시를 위한 상위 Master System 설계
김상태(S.T. Kim),이정현(J.H. Lee),김지영(J.Y. Kim),이동철(D.C. Lee),문영환(Y.H. Moon),김태현(T.H. Kim),윤재영(J.Y. Yoon),김동준(D.J. Kim),이병준(B.J. Lee),한상욱(S.W. Han),남해곤(H.K. Nam),심관식(K.S. Sim),이승재(S.J. Lee),진보건(B.K. Jin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.11
In this paper, the master system of Wide Area Monitoring System in order to prevent reaching a fault influence toward power system is proposed. This system has three real time algorithms and a on-line one using i-piu transfer data and provides operators with various understandable monitoring viewers in HMI based on raw data and algorithm results.