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심건보(Keon-Bo Shim),김경철(Kung-Chul Kim),이형수(Hyung-Su Lee) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.11월
Usually, equations that calculate ground resistance of earth electrode was already informed well by form of earth electrode. Grounding system is very important facilities in electrical device. Boring grounding electrode is a technology that place is used in narrow and the earth resistance rate is high place. In this study, suggested model way for most suitable length calculation of boring earth electrod
심건보(Keon-Bo Shim),김경철(Kung-Chul Kim),김한상(Han-Sang Kim),김종민(Jong-Min Kim) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.11월
To receive size of same ground resistance by form of construction work of ground electrode, there is difference of amount or price of used resources, and should construct ground electrode little more effectively because appear to differ in life period according to nature of ground electrode resources, but should consider economical efficient.
접지시스템에서 지층구조의 변화에 대한 최대 허용전압의 특성
심건보(Keon-Bo Shim),김경철(Kung-Chul Kim),이형수(Hyung-Su Lee) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.5월
During the ground fault conditions, the flow of current to earth will produce potential gradients within and arround a substation. The common physiological effects of electric current on the body, stated in order of increasing current magnitude, are threshold perception, muscular contraction, unconsciousness, fabrillation of the heart. In this study, determined the tolerable voltage about earth-layered structure in the grounding system.
심건보(Keon-Bo Shim),김주락(Joorak Kim),오임걸(Im-Geol Oh) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.5월
Many load modeling concepts have been proposed in the past. Efforts of load modeling may be summarized into three approaches ; the first one is to find an aggregation of various different load components scattered and distributed in an area. The second one is to find parameters to represent load from field tests, if any. And the third one is how to present the load of motor components could be represented. This paper proposes a system identification of combined load modeling to cover the second approach. In this paper, an improved method of system identification is suggested for the combined load model (dynamic and static load model) in which parameters of the equivalent induction motor, polynomial type load and their compositions.
심건보(Keon-Bo Shim),김경철(Kung-Chul Kim),김한상(Han-Sang Kim),김종민(Jong-Min Kim) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.5월
The potential and step voltage distribution around low voltage joint-box cover were simulated with the variation of resistivity of water, depth of submerged water and point of leakage current. The potential distribution is very high gradient around low voltage joint-box, this condition is very dangerous states.
배전계통에 사용되는 접지전극 재료별 초기 공사비의 경제성 비교
심건보(Keon-Bo Shim),김경철(Kyung-Chul Kim),이형수(Hyung-Soo Lee),최종기(Jong-Kee Choi),이남우(Nam-Woo Lee),나동채(Dong-Chae Na) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
To receive size of same ground resistance by form of construction work of ground electrode, there is difference of amount or price of used resources, and should construct ground electrode little more effectively because appear to differ in life period according to nature of ground electrode resources, but should consider economical efficient.
22.9㎸ 다중접지 배전계통에서 고장전류의 접지저항 영향 분석
심건보(Keon-Bo Shim),김경철(Kyung-Chul Kim),이형수(Hyung-Soo Lee),최선규(Sun-Kyu Choi),정금영(Geum-Young Jung) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
During a ground fault the maximum fault current and neutral to ground voltage will appear at the pole nearest to the fault. Distribution lines are consisted of three phase conductors, an overhead ground wire and a multi-grounded neutral line. In this paper phase to neutral faults were staged at the specified concrete pole along the distribution line and measured the ground fault current distribution in the ground fault current, three poles nearest to the fault point, overhead ground wire and neutral line. A effect by grounding resistance of poles of ground fault current in te 22.9㎸ multi-ground distribution system by field tests.
KEPCO 배전계통에서 전력유도대책을 위한 접지효과 해석
심건보(Keon-Bo Shim),김경철(Kyung-Chul Kim),이형수(Hyung-Soo Lee),최선규(Sun-Kyu Choi),최종기(Jong-Kee Choi),구성완(Sung-Wan Ku) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper presents about the grounding effect for the reduction of power induction on multiple neutral grounded distribution system in KEPCO. When 1-phase ground fault was occurred in multiple neutral grounded distribution system, most fault currents flow through the neutral conductor. And remainder fault current is flowed in earth through the neutral grounding electrode. This current - fault current is flowed in earth through the neutral grounding electrode - source of power induction. In this study, analyzed effect of source current for power induction by change of neutral grounding resistance.
22.9㎸ 다중접지 배전계통에서 1선 지락 고장 시험 및 해석
심건보(Keon-Bo Shim),김경철(Kyung-Chul Kim),이형수(Hyung-Soo Lee),최선규(Sun-Kyu Choi),권태호(Tae-Ho Kwon) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
A line-to-ground faults are possibly one of the maximum number of faults in power distribution system. During a ground fault the maximum fault current and neutral to ground voltage will appear at the pole nearest to the fault. Distribution lines are consisted of three phase conductors, an overhead ground wire and a multi-grounded neutral line. In this paper phase to neutral faults were staged at the specified concrete pole along the distribution line and measured the ground fault current distribution in the ground fault current, three poles nearest to the fault point, overhead ground wire and neutral line. A simplified equivalent circuit model for the distribution system under case study calculated by using MATLAB gives results very close to the ground fault current distribution yielded by field tests.