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옥연호(Ok Yean Ho),임재일(Lim Jael Il),박지군(Park Ji Kun),곽원구(Kwak Won Ku),이광연(Lee Kwang Yeon) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
Recently with increase consumption of electric power, the scale of the electric system becomes bigger and complex. Then, it is increasing the hardship in the operation of electric system and the continuance of stability. Especially, as the differences between demand and supply in electric power keeping low frequency oscillating attenuation from electric power have been very important in the continuance part of stability. The more control time of electricity system is getting faster with digitalization the more stability of electricity system is getting worse. As solutions of these problems, by establishing Power System Stabilizing Controller putting PSS output signal and putting damping to vibration of the rotor at generators's AVR in area where is oscillated, We are willing to contribute the electricity system by holding in generator output vibration.
발전통합운영시스템 최적제어 및 시스템 구성에 관한 연구
옥연호(Ok Yeon Ho),박지군(Park Ji Kun),곽원구(Kwak Won Ku),이재흥(Lee Jae Heung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
GIOS(Generation Integrated Operating System) is the system for observation and control of generating plant in SCADA(Supervisory Control And Data Acquisition). Major control systems in hydro power plant are Governor, AVR(Automatic Voltage Regulator), Spillway gates. besides, there is EMS(Energy Management System). Presently, most hydropower facilities are replacing because they are becoming superannuated as time passes(25 years). The existing facilities are replacing from analog type to digital type. At this point of time, this thesis is aimed at improving reliability of the facilities and setting the standard by analyzing the control method and system composition linked to GIOS(Generation Integrated Operating System).
옥연호(Ok Yeon-Ho),임재일(Lim Jae-Il),박지군(Park Ji-Kun),곽원구(Kwak Won-Ku),이재흥(Lee Jae-Heung),최형철(Choi Hyeong-Cheol),이남형(Lee Nam-Hyung),신병철(Shin Byoung-Chol) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
진단기술은 기기의 열화 현상 및 이상 현상으로 진전되는 특성을 측정하여 향후 발생이 예상되는 이상을 조기에 발견하는 것을 목적으로 한다. 기기를 정밀 진단, 분석하여 잔여 수명을 평가하고 적절한 대체계획을 수립함으로써 신뢰도 향상 및 경제적인 설비 운용이 가능하다. 본 논문에서는 수력 발전기 운전 중 부분방전 진단 시스템을 이용하여 수력 발전기의 운전 중에 발생하는 부분방전 신호를 실시간으로 측정, 분석하고 수력 발전기 권선의 절연 상태를 감시 진단하여 기기의 열화 및 이상 현상등을 조기에 발견하고 발전설비의 신뢰도를 향상시킬 수 있는 방안을 제시하고자 한다.
수력발전기 On-line 부분방전 측정 시스템을 이용한 절연상태 진단의 신뢰성 향상
옥연호(Yeon-Ho Ok),이은웅(Eun-Woong Lee),임재일(Jae-Il Lim),박지군(Ji-Kun Park),곽원구(Won-Ku Kwak),이재흥(Jae-Heung Lee),신재필(Jae-Pil Shin),신병철(Byoung-Chol Shin) 대한전기학회 2009 전기학회논문지 P Vol.58 No.4
Accident dangerousness of domestic hydro power generators which are operated in Korea is on the increase because of use at the long term. On this, the Off-line diagnosis techniques developed to the On-line by continued domestic technical development since 2000. Especially, On-line insulation diagnosis of domestic hydro power generator is possible by localization of partial electric discharge sensor and On-line insulation diagnosis system. This paper shows the diagnosis result that is applied localized Ceramic Coupler and PDMS-HG(Partial Discharge Monitoring System for Hydro Generator) at four Chung-ju hydro Generator used for 25 years. Particularly, the confidence of insulation diagnosis is improved by using high frequency filter and sampling the partial discharge signals which occur in site. For reviewing the confidence of On-Line insulation diagnosis system, we measured the outside noises and partial discharge signals during practical operation by using the partial discharge diagnosis system of the Full A/D process. And we reviewed the confidence of the On-Line insulation diagnosis system by comparing and analyzing these data.