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윤창섭(Chang-Sub Yun),이종범(Jong-Beom Lee),이재봉(Jae-Bong Lee) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
This paper describes the analysis to install an arrester for an underground distribution line effectively. Currently, the underground distribution cable is protected by the arrester connected with overhead distribution line. However, riser pole arrester cant protect all parts of cable like the end of the underground distribution cable. To solve this problem, we installed the arrester on each cable and have measured the overvoltage made by lightning surge in each situation. The location to get effective results has been decided from the measured voltage above.
尹昶燮(Chang-Sub Yun),李鍾範(Jong-Beom Lee),趙漢九(Han-Goo Cho) 대한전기학회 2006 전기학회논문지A Vol.55 No.10
This paper describes the characteristic evaluation of 154㎸ lightning arrester developed by domestic technology. To prove the protective ability of lightning arrester developed, various overvoltages were analyzed for A and B arrester were being used now at 154㎸ air and gas insulation substation, and for arrester developed. The results obtained by the various simulations show that the developed arrester has the effective protective ability and reducing ability of the overvoltage as A and B arrester, nevertheless there are somewhat differences among three kinds of arresters. Accordingly, it is evaluated that the arrester developed by domestic technology secured reliability can be installed actually at 154㎸ substation. In this paper, EMTP/ATP was used for simulation.
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.
지중배전계통 보호설비 적정위치 선정을 위한 실증시험과 해석
尹昶燮(Chang-Sub Yun),李鍾範(Jong-Beam Lee) 대한전기학회 2008 전기학회논문지 Vol.57 No.5
This paper describes the method for proper location of protective equipment in underground distribution cable through field test and analysis at testing lines. To prove the reliability for analysis simulated by EMTP/ATPDraw, the testing results obtained by the real test and the analysis for the same test lines were compared each other. The accuracy of analysis was proved by the comparison. Over voltages were measured and analyzed at each point of cable and switches in case of which lightning surge current was applied. The analysing method was applied to real distribution systems to select the proper location of protective equipment. It is evaluated that the location of protective equipment was properly selected.
혼합 배전계통에서 피뢰기적용과 접지시스템 변경을 고려한 서지 해석에 관한 연구
윤창섭(Chang-Sub Yun),이종범(Jong-Beom Lee),김병숙(Beong Suk Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
This paper describes the protective ability of lightning arrestor in combined distribution system with power cable. To evaluate the protective ability, change of arrestor and grounding location are considered. On the other hand, arrestor developed by Cooper Power Systems for underground power cable system, is considered to evaluate surge protective ability as in underground system, when arrestor occurs failure has overhead line. The result shows that lightning arrestor in combined distribution system with power cable protect effectively when failure at arrestor in overhead line. On the other hand, arrestor developed by Cooper Power Systems for underground power cable system, is considered to evaluate surge protective ability in underground distribution system, when arrestor of overhead line has failure. The result shows that lightning arrestor installed in underground cable can effectively protected cables from surge when arrestor of overhead line has failure. And also even though grounding locations are decreased, it is revealed that protective ability is nearly similar.
尹昶燮(Chang-Sub Yun),李鍾範(Jong-Beom Lee),李載奉(Jae-Bong Lee),金炳塾(Byong-Suk Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.12
This paper described the verification of modeling technique of underground distribution line from comparison between field test and simulation. It needs more exact transient phenomenon analysis model to establish lightning protection of underground distribution line. Although, there were a lot of transient phenomenon researches, nobody could has verified the confidence of modeling from field tests in interior until now. So, simulation model verified field test is needed to analyse transient phenomenon of underground distribution system. The examination must be accomplished in many different condition before suggesting these verified analysis model. In this paper, the conditions were examined and the various data results on the different line composition was compared with the EMTP simulation, when the lightning impulse test was accomplished at underground distribution line. Also the value between field test and simulation was very closed and the method of modeling has demonstrated confidence, when the method is used to analyse domestic transient phenomenon of underground distribution.