• Title, Summary, Keyword: EMTP/ATPDraw

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Analysis of Lightning Surge In the Underground Dlstrlbutlon Systems (지중배전계통에서 뇌서지특성 해석)

  • Lim, Kwang-Sik;Lee, Jong-Beom
    • Proceedings of the KIEE Conference
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    • pp.1713-1714
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    • 2006
  • This paper aims to analyze the overvoltage in underground distribution systems when lightning surge strikes to overhead line. The model is established by EMTP/ATPDraw for actual distribution systems. Simulation is carried out considering variation of parameters such as length and lightning current.

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Analysis of Lightning Surge in the Underground Distribution Systems (지중배전계통에서 뇌서지특성 해석)

  • Lim, Kwang-Sik;Lee, Jong-Beom
    • Proceedings of the KIEE Conference
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    • pp.1253-1254
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    • 2006
  • This paper aims to analyze the overvoltage in underground distribution systems when lightning surge strikes to overhead line. The model is established by EMTP/ATPDraw for actual distribution systems. Simulation is carried out considering variation of parameters such as length and lightning current.

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The transient analysis for choosing the optimal SCR ratings of AC3 utilization category testing equipment used for electrical durability test for magnetic switch (IEC60947-4에 따른 전자개폐기 전기적 수명시험설비의 과도현상을 고려한 SCR최적 정격선정에 대한 연구)

  • Ryu Haeng Soo;Kim Kab Dong;Han Gyu Hwan
    • Proceedings of the KIEE Conference
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    • pp.354-356
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    • 2004
  • This paper is the transient analysis for choosing the optimal SCR ratings of AC3 utilization category testing equipment(AC3 TE) used for electrical durability test for magnetic switch according to IEC60947-4 Annex B by utilizing EMTP -ATPDraw. Magnetic contactor closes and opens the motor load with ON/OFF switch of electronic contactor. It is also used for protecting and controlling the load. Magnetic contactor detects the over-current flow in the load with a over-current relay and disconnects the load by opening its control power. The key cost of AC3 TE is the SCR ratings. The more decreases SCR ratings, the more decreased the cost is, but it is impossible to ensure the reliability. On the other hand, the more increases SCR ratings, the more increased the cost is. Thereupon, in this paper after the testing circuit is simulated by using EMTP-ATPDraw the SCR ratings will be applied in order to guarantee the testing reliability of PT&T(Power Testing and Technology institute in LG Industrial Systems Co.,Ltd.).

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Neutral Current Calculation of the One Step Type Pole using KEPCO's Distribution System (한전 실 배전계통 모델을 이용한 1단 장주 중성선 전류 계산)

  • Seo, H.C.;Park, K.W.;Kim, C.H.;Jung, C.S.;Yoo, Y.P.;Lim, Y.H.;Seol, I.H.
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.1
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    • pp.35-40
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    • 2007
  • The one step type and two step type pole are used in distribution line. If the three phases are not balanced, the communication line can be damaged by induced voltage. This paper calculates the neutral current using KEPCO's distribution system model which is only composed by one step type pole. The used system model is modelled by using ATPDraw and the neutral current is calculated by using EMTP/MODELS. Many cases for abstracting the neutral current characteristics in KEPCO's distribution system are simulated and analyzed.

Analysis of lightning surge on the 345kV Gas Insulated Substation (345kV GIS 변전소 뇌써지 해석)

  • Kim, Jae-Kwan;Lee, Jong-Beom;Cho, Han-Goo
    • Proceedings of the KIEE Conference
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    • pp.561-563
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    • 2003
  • This paper deals with simulation of lightning overvoltage generated by back flashover entering 345[kV] Gas Insulated Substation. In order to protect the substation equipment against lightning surge, insulation coordination is performed with the lightning arrester. This paper suggests optimal location of lightning arrester using the EMTP/ATPDraw to mere economically and effectively reduce the lightning surge incoming overhead lines.

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Analysis of Surge behavior on Branch Line in the Underground Distribution Systems (지중배전계통에서의 분기선로의 서지특성 해석)

  • Lee, Jang-Geun;Lee, Jong-Beom;Lee, Jae-Bong
    • Proceedings of the KIEE Conference
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    • pp.157-158
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    • 2006
  • This paper describes the overvoltage of branch line in underground distribution systems when the direct lightning surge strikes on conductor of overhead line. Distribution systems are very complex because that includes so many branch lines, transformers, switches and so on. Therefor model systems consist of overhead distribution lines, underground cable include branch lines, lightning source and switches. Those are established by EMTP/ATPDraw. Simulation analyzes surge behavior on branch lines considering various conditions in underground distribution systems. Simulation results shoe overvoltage with location in various cases.

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Neutral Current Calculation in One Step Type Pole (1단장주 중성선 전류 계산)

  • Seo, Hun-Chul;Park, Keon-Woo;Kim, Chul-Hwan
    • Proceedings of the KIEE Conference
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    • pp.480-481
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    • 2006
  • This paper presents computation of the neutral torrent using KEPCO's distribution system model which is composed by only one step type poles. The used system model is modelled and simulated by using ATPDraw. And the neutral current is calculated by using EMTP/MODELS.

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Analysis of Effect on the Transient State According to Common Grounding between Underground Transmission Systems and Distribution Systems (지중송전 및 배전계통의 공통접지에 따른 과도상태 영향 분석)

  • Lim, Kwang-Sik;Lee, Jong-Beom
    • Proceedings of the KIEE Conference
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    • pp.740-741
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    • 2007
  • This paper analyses the transient state of underground distribution system against single line to ground fault in underground transmission systems, when underground transmission systems and distribution systems are made of common grounding. Underground transmission systems and distribution systems are modeled by EMTP/ATPDraw. Simulation is carried out considering variation of parameters such as value of common grounding, balance load and unbalance load.

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A Study on the Analysis of Transient Phenomenon (DC 전원 가압시 과도현상 분석에 관한 연구)

  • Oh, Seung-Taek;Park, Keon-Woo;Kim, Chul-Hwan
    • Proceedings of the KIEE Conference
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    • pp.1936-1937
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    • 2007
  • 본 논문은 EMTP / ATPDRAW를 이용하여 II-등가모델을 이용한 DC 전원 가압 시 과도현상 분석 결과를 제시하였다. T-등가모델 보다 II-등가모델이 정확히 우리가 원하는 고조파를 완전히 제거하지는 못하지만 간단한 직렬연결을 통하여 제거할 수 있는 고조파의 종류를 늘릴 수 있다는 장점 때문에 송전 설비의 추가적인 건설이 어려운 우리나라의 상황에 송전 설비를 최적으로 사용할 수 있는 적절한 방법이 됨을 알 수 있다.

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Analysis of Switching Overvoltage on Operating Reclosing in Combined Transmission Systems (혼합송전계통에서 재폐로 시행시 개폐과전압 해석)

  • Lim, Kwang-Sik;Lee, Jong-Boem;Jung, Chae-Kyun;Kang, Ji-Won;Park, Hung-Sok
    • Proceedings of the KIEE Conference
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    • pp.391-393
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    • 2008
  • This paper is analysed by switching overvoltage on operating reclosing in 154 [kV] combined transmission systems. Combined transmission systems are modeled by EMTP/ATPDraw program. It is fault condition that simulate high resistance earth fault. The simulation is carried out considering variation of parameters such as resistance value of fault point and rate of underground line.

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