• Title/Summary/Keyword: XLPE cable

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Development & Practical Installation of 400kV XLPE 1C${\times}$2500SQ Enamel coating Power Cable Accessories (400kV Enameled Cu 1C${\times}$2500SQ 케이블 접속재 개발 및 실선로 적용)

  • Kim, Young-Tek;Kim, Hyun-Ju;Kim, Han-Hwa;Park, Jeong-Ki;Han, Du-Hyun;Choi, Man-Ok
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1614-1616
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    • 2011
  • 지중송전라인에서 전압등급의 상승은 선로손실을 줄이면서 밀집된 전력수요에 대응하거나 특별히 고전압 수요를 맞추기 위한 것으로 이것은 XLPE Cable의 제조기술이 향상되면서 지속적으로 진행되어온 초고압송전계통의 일반적 추세이다. 이러한 경향으로 해외에서는 케이블 도체의 송전용량을 증대시킬 수 있는 방법으로 케이블 도체에 에나멜 코팅을 하여 집합을 한다. 그러므로써 기존 케이블에서 발생되는 표피현상 및 근접효과에 의한 AC 저항 요소를 줄여 요구하는 전류용량을 기존 비소선절연 케이블에 비해 더 많이 송전할 수 있다. 하지만, 소선절연 케이블이 전류 용량을 증대 시킬 수 있는 장점은 있으나 접속재의 경우 도체의 에나멜 코팅을 제거해야 하는 문제점이 있다. 당사는 에나멜 코팅을 제거하는 방법을 개발 완료함으로써 본 접속재의 개발을 앞당길 수 있었다. 당사는 쿠웨이트 400kV MEW/C/3931 Project에 400kV XLPE 1C${\times}$2500SQ 소선절연 초고압송전라인을 적용하였는데 본고에서는 여기에 적용된 400kV XLPE 1C${\times}$25000SQ 소전절연 케이블 부속재의 신뢰성을 높이기 위한 설계방법, 시험 및 시공에 대하여 요약하였다.

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Dielectric Strength According to Flow Pattern in EHV Power Cable Insulation (초고압 전력케이블 절연체의 Flow Pattern에 따른 절연성능 고찰)

  • LEE, Seung-Yop;KIM, Young-Ho;LEE, Sang-Jin;KIM, Dong-Wook;CHOI, Myung-Kyu
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.1539-1541
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    • 2000
  • Insulation layers in XLPE power cables may have some patterns generated in the manufacturing process. They are called 'flow patterns' and show flow history of molten polyethylene between inner and outer semiconducting layers. Flow patterns are even seen with naked human eyes and suspected to be inhomogeniety of insulation, weakening insulation performance. Investigated in this paper is electrical treeing resistance and ac breakdown strength according to flow patterns. Experiments of electrical treeing and ac breakdown strength by means of ramp tests were conducted using newly developed electrode system with point-to-plane structure and sphere-to-sphere structure, respectively. All results were analyzed with the application of statistics, showing little differences.

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Design and Fabricate a Single Phase 1MVA Cable Transformer (단상 1MVA 케이블 변압기의 설계 및 제작)

  • Park, Jung-Ho;Heo, Woo-Heng;Cho, Ik-Choon;Jeong, Han-Jin;Kwon, Young-Ahn
    • Proceedings of the KIEE Conference
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    • 2006.04b
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    • pp.71-73
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    • 2006
  • 본 논문은 단상 1MVA 22.9kV/220V 케이블 변압기의 설계, 제작 및 시험 결과를 서술한다. 케이블 변압기는 유입변압기의 폭발위험성과 환경오염 가능성이 없으므로, 인구밀집지역, 지하장소등 설치장소의 제한이 없는 장점이 있다. 제작된 케이블 변압기는 22.9kV급의 XLPE 케이블 전선을 사용하여 1차 권선을 제작하였으며, 2차측 권선은 내 단락시 특성이 우수한 몰드 권선 형태로 제작하였다. 사용된 XLPE 케이블은 도체-내부반도전층-XLPE-외부반도전층으로 구성되어 있으며, 외부반도전층은 접지된 구조이다. 철심은 단상 3각 구조로써 방향성 규소강판을 사용하였으며, 냉각방식은 공기 자연냉각방식이다. 제작된 변압기의 신뢰성을 확보하기 위하여, 특성시험과 절연시험을 실시하였다.

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Dignosis of XLPE Cable Long-Term Used in Nuclear Power Plant (원자력발전소 장기사용 XLPE 케이블 성능측정)

  • Lim, Woo-Sang;Joo, Kwang-Ho;Ha, Che-Wung
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.804-805
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    • 2011
  • 국내 원자력발전소의 고압 케이블의 체계적인 열화 진단 및 수명예측을 위한 사전작업으로 원자력발전소에서 불리한 환경 하에서 장기간 사용된 후 철거된 XLPE 전력 케이블을 대상으로 성능 측정을 수행하였다. 측정 방법으로는 VLF(Very Low Frequency) Tan${\delta}$ 방법 및 상용주파 부분방전시험을 택하였다. 또한 고주파변류기(HFCT)를 사용하는 부분방전 측정방법(HFPD)에 VLF 내압기를 적용할 수 있는지 확인하였다.

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Statistical Analysis of Breakdown Voltage using needle electrode inserted in XLPE (침전극하에서 XLPE의 절연파괴강도의 통계적평가)

  • Oh, Jae-Hyung;Jun, Eun-A;Park, Woon-Ho;Park, Soo-Gil;Park, Dae-Hee
    • Proceedings of the KIEE Conference
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    • 1998.11c
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    • pp.872-874
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    • 1998
  • The needle electrode was inserted in virgin and 1.000 hr aged XLPE which is the insulation used for 22.9 kV underground distribution cable with the distance of 1, 1.5 and 2mm respectively. Breakdown voltage were measured for the virgin and 1.000 hr aged specimen and statistically evaluated through Weibull distribution. As the of electrode increase in virgin and 1.000 hr aged specimen. shape parameter and scale parameter showed increase coincidently. For shape parameter, the value of aged specimen showed the higher than that of virgin specimen.

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Electrical Conduction Characteristics of XLPE Film According to Electrode Metals (전극금속재질에 따른 XLPE Film의 전기전도특성)

  • Lee, H.G.;Park, Y.G.;Shin, T.S.;Lim, K.J.;Kim, Y.J.
    • Proceedings of the KIEE Conference
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    • 1998.07d
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    • pp.1419-1421
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    • 1998
  • Many kind of factors have influence on the electrical properties of polymer such as mechanical stress, impurity, additives, chemical blend, interfacial phenomena and so on. In this study, we lay emphasis on interfacial phenomena which is important part in insulating design of power cable. The electrical conduction characteristics of XLPE film are investigated as a function of different electrode materials in MIM Interfaces.

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A VLF Breakdown Strength Test of The XLPE Cable on Thermal Aging (열 열화에 따른 XLPE의 VLF 절연파괴 특성)

  • LEE, Seung-Won;KIM, Su-Hwan;KIM, Yong-Hyun;LIM, Jang-Seob;LEE, Kun-Ho
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.1215-1215
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    • 2015
  • 본 연구에서는 상용 XLPE 절연체에 ES(한전)의 장기과통전 시험 기준을 참고하여, 가속 열 열화 하였고, 열화 전/후의 절연특성을 비교하기 위하여 VLF(0.1Hz) 내전압 파괴시험을 수행하였다. 또한, 그 결과를 Weibull plot하여 절연특성을 통계적으로 비교 및 분석하였다.

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A Study on Phenomena of Watertree and Dielectric Breakdown in XLPE (XLPE의 수트리와 절연파괴 현상에 관한 연구)

  • Lee, Sung-Il;Ryu, Sung-Lim;Park, Il-Kyu;Lee, Ho-Sik
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.11b
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    • pp.262-265
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    • 2001
  • In order to investigate the water tree degradation behavior on XLPE cable, direct voltage of 200 to 800V has been applied to the material at $50^{\circ}C\sim100^{\circ}C$. and the water tree property has been correlated with voltage and temperature in this study. The leakage current was shown to increase as temperature increased and the Ohm's law was generally satisfied in this experiment though some experimental errors were found. The leakage current was shown to decrease and reach to the stable state with time. It was also shown that the time for the stabilization of leakage current was lessened as voltage increased

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Electrical Properties of XLPE Power Cable by DCP and TMPTA Content (전력 cable용 XLPE의 제조과정 중 가교제와 가교조제의 함량이 미치는 전기적 특성)

  • Kim, Gyu-Sik;Lim, Kee-Joe;Ryu, Boo-Hyung;Park, Soo-Gil
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.2077-2080
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    • 2000
  • We studied about electrical, chemical and mechanical characteristics of XLPE by dicumyl peroxide(DCP) and trimethylolpropane triacrylate(TMPTA) content ratio. DCP content was changed from 1.0 to 2.5phr increasing 0.5phr. TMPTA content was changed 0.5 to 1.5phr increasing 0.5phr. Thermal analysis (DSC) was carried out in order to observe tendency of 79 according to DCP and TMPTA content. In experimental results, content DCP 2.0phr and TMPTA 1.0phr has highest breakdown strength. Content DCP 2.0phr and TMPTA 0.5phr has lowest dielectric constant. Tendency of Tg did not affected by DCP and TMPTA content. Breakdown strength and Specific inductive capacity was measured.

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Characteristics of Radiated Electromagntic Wave Caused by Progress of Partial Discharge in Power XLPE(Crosslinkable Polyethylene) Dielectric (전력용 XLPE 절연체의 부분방전진전에 따른 방사전자파 특성)

  • Lee, H.C.;Park, K.S.;Yoon, D.H.;Lee, S.H.;Kim, J.H.;Kim, K.Ch.;Lee, K.S.
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.05a
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    • pp.304-307
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    • 2004
  • This paper simulated partial discharge caused by 22.9[kV] power cable using XLPE(Peroxide Crosslinkable Polyethylene) insulation having the outside damage. As one of the insulation diagnostic method a radiated electromagnetic waves were measured by an UHF method using a BiconiLog antenna(EMCO-3142) and a spectrum analyzer used to measure EMI, EMC. From results of this study, It was confirmed that discharge progress were possible to be estimated by the proposed method.

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