• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제52권1호
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• pp.16-22
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• 2003

While passing through the AC/DC section insulators installed at electric railroad catenary, some electric trains undergo mis-operation of main circuit breaker after AC/DC change-over operation. This paper provides insulation resistance measurements of AC/DC section insulators, which confirm the insulation levels of section insulators are below the standard of insulators. The insulation deterioration and pantograph arrangement on the electric train can produce voltage impression on section insulator which induces mis-operation of main circuit breaker To mitigate the insulation deterioration of the section insulator installed at underground railroads, the section insulators have been cleaned periodically, but section insulator structure should be modified to make the section insulator performance perfect. Based on the above analysis, effective modification method of AC/DC section insulator is provided.

• 조명전기설비학회논문지
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• 제16권6호
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• pp.87-94
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• 2002

전원위상이 다른 전차선 구간을 전기적으로 구분하기 위한 절연구분장치 중에서 특히, 지하구간에 설치된 교/직 절연구분장치는 강체가선 및 조가선 가선이 혼합된 특수한 가선구조로 되어 있어, 전동차 팬터그래프와 습동하는 절연재에 불규칙한 파상마모 현상이 발생한다. 본 논문에서는, 이와 같은 절연구분장치 절연재의 마모현상에 대하여, 현장 측정을 통하여 마모정도 및 마모형태를 조사하고, 전기철도 운행 및 유지보수에 미치는 영향을 분석하였다. 그리고. 절연재 이상마모에 영향을 미칠 수 있는 요인으로서, 절연구분장치의 설치높이 편차와 팬터그래프 압상력에 대응한 절연구분장치의 변위에 대한 실험적 분석을 수행하였고, 절연구분장치와 팬터그래프간에 작용하는 접촉력에 대한 이론적 분석을 통하여 그 발생원인을 규명하였다. 이와 같은 실험적, 이론적 분석을 토대로, 효과적인 절연구분장치 개량방법을 제시하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.269-274
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• 2008

The Seoul subway is acting the center of public transportation after the opening of the first line on August 15, 1974. and the subway line of the DC traction system is running and building to the ninth line. However, the main insulation parts used in overhead contact line are now imported from overseas products. Therefore, this paper considers domestic manufacture technology, supply easiness and economic effectiveness of insulation products and reviews the safety of support insulator used in rigid conductor line, stem insulator used in movable bracket and AC/DC different phase section insulator that localization development is necessary.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.371-377
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• 2009

The use of polymer insulator has increased all over the world. As of 2000's KEPCO has used it fully since they introduced it in early 1990's. In Korea it is very widely used by KORAIL which uses AC 25 kV system in the ground electric car line. And It is also used in tunnel electric car line to support AT feeder line. But it has not been used in the section of DC 1500 V. In case of DC 1500 V electric railway system It is has been developed by research institutes by means of R&D projects since 2008. The user cleans porcelain insulators regularly by water because of dusts and pollution. In case of polymer insulators It is very easy to be made dirty by pollution because of the material properties and hard to be cleaned by cleansing. In accordance with these reasons It is worried about deterioration. This paper deals with anticipating problems when we apply it to DC electric railway system and the procedure for testing polymer support insulator.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.325-329
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• 2002

This paper is intended as an investigation of the interface between Neutral section insulators and pantograph interface. Neutral section insulators are installed at the boundary between AC catenary system and DC catenary system, which should provide electrical insolation between two different catenary systems and pass the trains without interruption. As the number of the pantographs installed on the train increased, which is necessary for the VVVF inverter drive trains introduced in recent years, there occurs an serious aspects of the interaction between pantographs and Neutral section insulators. These effects hinder the automatic switch operation of MCB(Main Circuit Breaker) after passing through the section insulators, and lead to the extra-ordinary wear of FRP insulator material of section insulators. Countermeasures in terms of the interface between the Neutral secton insulators and electric collection system of train are provided too.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.1589-1590
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• 2015

전기철도차량에 전기를 공급하는 가공 전차선로 시스템은 커티너리(catenary) 방식과 강체가선 방식으로 구분 할 수 있으며 강체가선 방식은 DC 급전구간에서 주로 사용하고 있는 T-bar 시스템과 AC 급전구간에서 주로 사용하는 R-bar 시스템으로 구분 할 수 있다. 최근 국내환경에 적합한 고속용 R-bar 시스템의 개발을 진행하고 있으며 여기에 필요한 브래킷 지지 및 절연용 장간애자와 동상구분을 위한 절연구분장치 개발을 진행하고 있다. 따라서 국내에 수입하여 적용하고 있는 저속, 고속 R-bar 시스템용 장간애자 및 절연구분장치의 성능기준을 확인하고 개발에 필요한 성능기준을 검토 적용하여 고속 R-bar 시스템용 장간애자 및 절연구분장치 개발을 진행할 예정이다.