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金炳塾(Byong-Sook Kim),李長根(Jang-Geun Lee),李鍾範(Jong-Beom Lee),韓秉誠(Byoung-Sung Han) 대한전기학회 2007 전기학회논문지 Vol.56 No.3
This paper analyzes overvoltage on testing line for various parameter effect examination. Model systems consist of overhead line and underground cable. The model considered actual characteristic data of distribution lines, and will be constructed at testing yard. The simulations were performed under various line configuration such as cable kinds, cable length, lightning wave, lightning wave time, transformer and branch circuits. The simulation models are established by EMTP/ATPDraw and Line Constants are calculated by ATP_LCC. When lightning surge strikes on conductor of overhead line, EMTP/ATPDraw calculates overvoltage in many cases. Simulation results will be compared with real testing results at testing yard. The compared results will be used to establish protection methods in actual underground distribution systems.
가공배전계통에서 중성선과 가공지선 혼용 운용시 지중선로의 과전압 해석 및 평가
정석산(Seok-San Jeong),이종범(Jong-Beom Lee),김병숙(Byong-Sook Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
In combined distribution system, overhead ground wire and neutral wire are parallel connected to offer the electrical power energy and protect damage of lightning strokes. Therefore a case where the two wires become single wire, the power company can get the benefit such as installation cost saving and line fault protection by simplify of distribution line. This paper describes the result of impulse test in both system ; one is the present distribution system, the other is unified power system parallel connected overhead ground wire and neutral wire. As a result of this simulation, the present power system get lower over voltage than the unified power system.
윤창섭(Chang-Sub Yun),이종범(Jong-Beom Lee),송일근(Il-Kun Song),김병숙(Byong-Sook Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.11
This paper describes the transient phenomena considering transformer model in combined distribution systems with power cables. To evaluate the overvoltage, the change of transformer model and system structure are considered. Transformer parameters calculated by BCTRAN of EMTP are considered to evaluate surge generation in underground distribution systems when underground distribution system has various parameters. It is evaluated that overvoltage value increases and decreases according to the structure of system. However it is confirmed that there is not much effect to overvoltage as transformer is operated in distribution line.
李長根(Jang-Geun Lee),李鍾範(Jong-Beom Lee),金炳塾(Byong-Sook Kim),韓秉誠(Byoung-Sung Han) 대한전기학회 2006 전기학회논문지A Vol.55 No.8
This paper describes the overvoltage obtained by surge behavior analysis in testing underground distribution systems. Model systems consist of overhead distribution line and underground cable. Such model system considered various characteristics of actual distribution systems will be soon constructed at testing yard. Simulation is carried out under various states such as cable kinds, cable length, lightning wave and time, and branch. circuits. Model is established by EMTP/ATPDraw. Line Constants are calculated by ATP_LCC. When the direct lightning surge strikes on conductor of overhead line, the overvoltage is calculated using EMTP/ATPDraw in many cases. Simulation results will be compared with real testing results at testing yard in the near future. The compared results will be used to establish protection methods in actual underground distribution systems.