• Title/Summary/Keyword: Gas Insulated Switchgear(GIS)

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UHF PD Systems of LGIS (LG산전 UHF 부분방전 시스템)

  • Lee, Chang-Jun;Lee, Hee-Cheoul;Park, Jong-Wha;Kang, Won-Jong;Kang, Yoon-Sik
    • Proceedings of the KIEE Conference
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    • 2004.07c
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    • pp.1888-1890
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    • 2004
  • 현대사회에 들어서면서, 전력수요의 중가와 전력기기산업의 고집적화에 따라 사고시에 발생하는 파급효과가 대형화되는 추세에 있다. 따라서 이를 미연에 방지하기 위한 연구가 각 분야에 걸쳐 활발하게 진행되고 있다. 이에 당사에서는 초고압 계통에서 사용되는 SF6가스 절연 GIS(Gas Insulated Switchgear) 및 Oil-Transformer에서의 부분방전 측정/분석을 위하여 UHF/AE를 이용한 on-line/portable 측정 시스템을 개발하였다. 본 논문에서는 개발/상용화 되어 field에서 사용되고 있는 시스템의 전반에 대하여 설명한다. 또한 철재 선진사와 공동 진행중인 Risk Assessment에 대하여 언급하였다.

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Development of External UHF PD Sensor for the Detection of Partial Discharge in $SF_6$ Gas-insulated Switchgear (가스절연 개폐장치의 PD검출용 UHF 대역 외장형 센서 제작 및 감도 특성)

  • Lee, Chang-R.;Hong, C.Y.;Choi, B.H.;Yoon, J.H.;Nam, G.C.;Jung, J.G.
    • Proceedings of the KIEE Conference
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    • 2004.07c
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    • pp.1799-1801
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    • 2004
  • We have developed the external-type PD sensors for detecting of the electromagnetic waves up to ultra high frequency (UHF) bands, propagating in various type of GIS. Sufficiently high sensitivity and accuracy for practical use were achieved for the external PD sensor. The experience at the fields and the criteria for the judgment are also discussed in detail.

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Dielectric Strength for Imitation Air with Pressure Variation under Uniform and Non-Uniform Fields (평등/불평등 전계하의 제조공기(I-Air)에 대한 압력별 절연파괴강도 특성)

  • Lee, Chang-Uk;Lee, Chang-Hun;Choi, Eun-Hyuck;Lee, Sang-Ho;Lee, Kwang-Sik
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.11a
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    • pp.263-266
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    • 2007
  • In this paper approves (AC and DC) high voltage by experimental GIS(Gas Insulated Switchgear) chamber and (AC and DC) power source to study breakdown characteristics by pressure(P) change and change of electrode distance(d) at (AC and DC) high voltage of Imitation I-Air, $N_2$ : $O_2$ = 79(%) : 21[%]) to alternate $SF_6$ and achieved research. Gave P change of I-Air to study I-Air's Dielectric Strength using uniform and non-uniform fields(sphere-sphere and Needle-Plane electrode) and studied relations dielectric strength($V_D$) by each P different d.

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Breakdown Characteristics for Imitation Air and $SF_6$ with Pressure Variation under Uniform and Non-Uniform Field (평등/불평등 전계하에서 제조공기(I-Air)와 $SF_6$에 대한 압력별 절연파괴특성)

  • Lee, Chang-Uk;Lee, Chang-Hun;Choi, Eun-Hyuck;Jang, Seung-Ho;Lee, Kwang-Sik
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.11a
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    • pp.259-262
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    • 2007
  • In this paper approves AC high voltage by experimental GIS(Gas Insulated Switchgear) chamber and AC 300[kV] power source to study breakdown characteristics by pressure(P) change and change of electrode distance(d) at AC high voltage of Imitation Air(I-Air, $N_2$ : $O_2$ = 79(%) : 21[%]) to alternate $SF_6$ and achieved research. Gave P change of I-Air to study I-Air's breakdown characteristics using uniform(Sphere-Sphere electrode) and non-uniform fields(Needle-Plane electrode) and studied relations breakdown voltage($V_B$) by each P different d.

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Breakdown Characteristics of Imitation Air under Non-Uniform Fields (불평등 전계하의 제조공기(I-Air)에 대한 절연파괴 특성)

  • Lee, Chang-Uk;Lee, Chang-Hun;Choi, Eun-Hyuck;Yoon, Dae-Hee;Jang, Seung-Ho;Kim, Jung-Bae;Park, Won-Zoo;Lee, Kwang-Sik
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.05a
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    • pp.385-388
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    • 2007
  • In this paper approves AC high voltage by experimental GIS(Gas Insulated Switchgear) chamber and AC 300[kV] power source to study breakdown characteristics by pressure(P) change and change of electrode distance(d) at AC high voltage of Imitation Air(I-Air, $N_2$ : $O_2$ = 79[%] : 21[%]) to alternate $SF_6$ and achieved research. Gave P change of I-Air to study I-Air's breakdown characteristics using non-uniform fields(Needle--Plane electrode) and studied relations breakdown voltage ($V_B$) by each P different d.

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The development of CB Characteristic Tester for 25.8kV GIS (25.8kV GIS용 차단기 동작특성 시험장치 개발)

  • Lee, Bong-Hee;Park, Soon-Kyu;An, Young-Ho;Yoon, Kap-Koo
    • Proceedings of the KIEE Conference
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    • 2001.07b
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    • pp.666-668
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    • 2001
  • In this paper we are to explain the development of circuit breaker characteristic tester for 25.8kV Gas Insulated Switchgear. Because of hermetically sealed cubicle, we have the difficulties of installation and usage of tester. Therefore we developed measuring tester and software. This tester can measure CB close/trip time, coil current, stroke, chattering time. And it has CB positive/ negative discrimination program, trend management program, DB management program.

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A Sensitivity Verification Method for the UHF Partial Discharge Detection System in the Gas Insulated Switchgear (GIS용 UHF 부분방전검출장치의 감도 측정법)

  • Goo, Sun-Geun;Park, Ki-Jun;Yoon, Jin-Yul
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1558-1560
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    • 2001
  • 네트워크 분석기를 이용하여 GIS용 UHF 부분방전 검출장치가 CIGRE 권고안을 만족시킴을 보일 수 있는 방법을 제안하였다. 이 방법은 운전중인 GIS에서도 활용이 가능하며 주파수 영역에서 GIS 내 부분방전신호의 감쇠율을 정확히 측정할 수 있고 측정 시스템의 개별부품에 대한 교정이 필요치 않다. 또한 측정한 GIS의 구간별 감쇠율을 이용해 센서의 종류와 부분방전검출장치 및 GIS의 구성에 따라 센서의 위치를 손쉽게 결정할 수 있다.

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An Analysis on Technology of Urban Railway Substation Insulation Diagnostic Program (도시철도 변전소 절연진단 프로그램 기술 분석)

  • Park, Hyun-June;Park, Young;Jung, Ho-Sung;Kim, Hyung-Chul;Ryu, Seon-Ki
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2010.06a
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    • pp.116-116
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    • 2010
  • This paper introduces an comprehensive monitoring and management program for implementation of a real-time monitoring system that monitors condition of urban railway AC/DC transformers, disconnecting switches, circuit breakers, regulators, and GIS (Gas Insulated Switchgear). Especially, the system is applied to diagnose the overall condition of urban railway substations by sending acquired data through an OPC server to a database, effectively storing and monitoring conditions simultaneously. The above system is a management based system and is also applicable to small-scale systems.

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Derivation of Real-time Monitoring System for Power Supply System in Metro Substation (도시철도 변전소 전력설비 실시간 모니터링 방안 도출)

  • Jung, Ho-Sung;Park, Young;Oeu, Soo-Young
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.23 no.4
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    • pp.333-337
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    • 2010
  • This paper introduces an overall system design of a real-time monitoring system that monitors condition of urban railway AC/DC transformers, disconnecting switches, circuit breakers, regulators, and GIS (gas insulated switchgear). For effective diagnosis of urban railway facilities we developed optimized sensors and application technology. The proposed system is combined with wireless technology, implementing remote real-time monitoring of urban railway facilities. The derived real-time monitoring system for power facilities in urban railway substations will be applied not only to diagnose low voltage DC (direct current) railways but also to diagnose design of small power facilities of skyscrapers and apartments.

Thermal Analysis of Power Apparatus Considering Resistance on Temperature Variation (온도변화에 따른 저항값을 고려한 전력기기의 열해석)

  • Kim, S.W.;Hahn, S.C.;Kim, J.K.
    • Proceedings of the KIEE Conference
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    • 2002.04a
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    • pp.52-54
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    • 2002
  • 최근 초고압 전력기기에 대한 많은 연구가 활발히 진행되고 있음에도 불구하고 통전용량에 크게 영향을 미치는 열해석에 대한 연구가 많이 부족한 실정이다. 본 논문에서는 초고압전력기기인 GIS(Gas Insulated Switchgear)의 모선에 대한 열해석을 다루었다. 해석방법은 유한요소법을 이용하여 온도상승을 예측하였다. 유한요소법은 3각형 등의 임의의 형상을 요소로서 채용할 수 있으므로 3상 모선과 같이 복잡한 형상도 표현할 수 있다. 열전달계수는 형상, 유동조건, 유체의 종류를 고려한 상관식을 이용하여 해석적으로 정확히 계산하였다. 열해석에 있어 자계해석을 통한 도체 및 탱크의 손실값 산정이 선행되어야 하는데, 이 손실값이 온도상승의 원인이 되므로 정확히 계산하여야 한다. 손실의 원인이 되는 도체 및 탱크의 저항은 온도가 상승함에 따라 비선형으로 변화하는데, 이것을 고려하여 반복적으로 계산함으로서 해석의 정확성을 높이고자 하였다. 실제 모델에 대한 온도상승 실험치와 본 논문에서 제시한 방법으로 해석한 계산치와의 비교를 통해 타당성을 입증하였다.

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