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김수배(Soobae Kim),이학주(Hak-ju Lee),김주용(Ju-Yong Kim),송일근(Il-keun Song) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
현재 미국 EPRI와 일본 산업기술종합연구소(AIST)를 중심으로 대전력 반도체 소자를 이용한 변압기 개발에 박차를 가하고 있다. 반도체 소자를 활용한 변압기(Solid State Electric Transformer)는 기존의 자기유도를 이용한 변압기에 비해 소형화 시킬 수 있고 환경오염 요소를 줄이며 고품질의 전력을 제공할 수 있는 등 다양한 장점을 가진다. 또한 통신기능을 통한 배전자동화 기능을 제공할 수 있음에 따라, 향후 스마트그리드로 변화될 전력산업 특히 배전계통에서 중요한 기능을 담당할 것으로 예상되고 있다. 본 논문에서는 지금까지 미국과 일본을 중심으로 개발이 진행 중인 반도체 응용 지능형 변압기의 개발 내용과 진행경과를 소개하고자 한다.
김수배(Soobae Kim) 대한전기학회 2017 전기학회논문지 Vol.66 No.2
This paper proposes the use of advanced generator models in the studies of Korean power systems to accurately represent the dynamic behaviors of synchronous generators and thus to achieve a better match between transient stability simulations and reality. In the paper, GENTPF and GENTPJ models are described which have appeared over the last decade in the WECC system. Those advanced models are compared with conventional synchronous generator models such as GENROU and GENSAL, which have been used in dynamic studies of Korean power systems. The advancements are investigated by recognizing the differences in block diagram, saturation modeling, and network interface equations. Simulation comparisons between conventional and advanced models in Korean power systems are then provided. Clear distinctions identified in the simulation results demonstrate the necessity of the use of advanced generator models in Korean power system.
김수배(Soobae Kim),오규환(Kyuwhan Oh),정광균(Kwangkyoon Jung),이범석(Beomseok Lee),현덕화(Duckhwa Hyun) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
There are several types of communication method which is used for the supply of electric power stably. But the communication methods used in KEPCO have weak points in the viewpoint of economy. technology and management. The Satellite communication systems have competitive power in price and technology for national wide utility owing to its wide area coverage and stability. This paper presents various adapted examples of the Power industry using he satellite communication systems.
김수배(Soobae Kim),오규환(Kyuwhan Oh),정광균(Kwangkyoon Jung),이범석(Beomseok Lee),현덕화(Duckhwa Hyun) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
There are several types of communication method which is used for the supply of electric power stably. But the communication methods used in KEPCO have weak points in the viewpoint of economy. technology and management. The Satellite communication systems have competitive power in price and technology for national wide utility owing to its wide area coverage and stability. For better practical use of satellite communication in power industry, we developed the portable satellite communication terminal. This paper presents various functions and composition of the portable terminal for power industry.
지자기 폭풍에 의한 국내 전력계통 최대 유도 전계량 분석
이배근(Bae-Geun Lee),김수배(Soobae Kim) 한국조명·전기설비학회 2020 조명·전기설비학회논문지 Vol.34 No.11
Geomagnetic disturbances from solar storms cause intensive variations in Earth’s magnetic fields. The changing magnetic field creates the geoelectric field, which accordingly induces currents in transmission lines and power transformers. Thus, geomagnetic disturbances have the potential to disrupt the operation of electric power systems. Electric power systems in higher geomagnetic latitude such as North America and Northern Europe have suffered from the disturbances. In this paper, maximum strength of geoelectric fields occurred over Korean power systems is evaluated using geomagnetic data over the past twenty years. This paper introduces the analytic basis to calculate the geoelectric fields using the geomagnetic measurements. The computation code for the numerical calculation is developed and then accuracy of the code is evaluated by comparing the results with a reference. Maximum strengths of geoelectric fields are analyzed with geomagnetic measurement data at four different locations including Icheon, Gangneung, Yongin and Jeju. Discussions about correlation of geoelectric field strength with locations is provided and the maximum strength is compared with the US geomagnetic standard.