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A Case Study of Degradation Characteristics for Rod-Insulator on Catenary System in Electric Railway

전기철도 전차선로 지지애자의 염해지역 열화특성 사례 연구

  • Jung, Hosung (Smart Electrical & Signaling Division, Korea Railroad Research Institute) ;
  • Park, Young (Department of Electrical System Engineering, Hanbat National University)
  • 정호성 (한국철도기술연구원 스마트전기신호본부) ;
  • 박영 (한밭대학교 전기시스템공학과)
  • Received : 2019.05.01
  • Accepted : 2019.06.04
  • Published : 2019.07.01

Abstract

In the Airport Railroad, the Yeongjong Bridge has a length of 4,420 m and connects Yeongjong Island with the mainland of Incheon City. The bridge is a two-level structure, consisting of a six-lane road at the upper level and a combination of a road and railroad at the lower level. The environmental conditions for the electric railway come mainly from the salt injury area and a heavy industry zone, and the maintenance cycles are determined differently depending on these conditions. This study analyzed the deterioration characteristics of long rod insulators produced with a movable ceramic bracket and polymer materials in the Yeongjong Bridge section of the Airport Railway operating in the salt injury area according to the material characteristics. Comparison of the corona measurements when the insulators were cleaned at the same time showed that the polymer insulator had a higher insulation performance than the ceramic insulator.

Keywords

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Fig. 1. Result of ceramic and polymer insulator on catenary system, (a) up line, (b) down line, (c) point of ultraviolet ray at up line, and (d) point of ultraviolet ray at down line.

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Fig. 2. Result of infrared ray on catenary system, (a) up line and (b) down line.

Table 1. Physical properties of long rod insulator in the catenary system on the Yeongjong Grand Bridge [12].

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Table 2. Weights for each classification for performance evaluation of insulators as catenary system.

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Table 3. Corona risk results for long rod insulator as a function of material.

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