ISSN: 0304-128X ISSN: 2233-9558
Copyright © 2024 KICHE. All rights reserved

Articles & Issues

Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.

All issues

열과 방전에 의한 주상변압기 절연재료의 열화

Aging of Insulating Material in Pole Transformer by Heat and Arc Discharge

HWAHAK KONGHAK, April 1997, 35(2), 140-146(7), NONE
downloadDownload PDF

Abstract

가속 열열화 실험과 방전 실험을 수행하여 주상변압기 절연재료의 열화반응을 연구하였다. 유중가스는 air bubbling 방식을 사용하여 추출하였으며 각 기체의 추출률로부터 용존된 유중가스량을 구하였다. 절연재료의 열화는 열분해와 산화반응에 의하여 진행되며 두 종류의 반응은 모두가 0차 반응으로 표시될 수 있었다. 열분해 반응의 경우 활성화 에너지는 25,800 cal/mol였고, 산화 반응의 경우 활성화 에너지는 20,600 cal/mol였다. H2, CH4, C2H6, C2H4, C2H2를 대상으로 한 gas pattern은 가속 열열화시 수소 주도형이었으며, 온도가 200℃에서 250℃로 상승함에 따라 탄화수소계 가스 중 최대 농도를 보이는 성분은 CH4에서 C2H6와 C2H4로 변하였다. 방전 실험에서는 초기에 수소가 다량 발생하였으나 방전이 많이 진행되면 열열화에서 거의 검출되지 않았던 C2H2가 많이 발생하였다.
Aging of insulating material in a pole transformer has been studied by performing accelerated thermal aging test as well as arc discharge test. Dissolved gases were extracted by air bubbling method. Concentrations of dissolved gases were modified by extraction ratios of each gases in insulating oil. Aging of insulating material was proceeded by both thermal degradation and oxidation reaction. Both of the reactions in insulating oil were shown to follow zeroth order kinetics. The activation energy for the thermal degradation was estimated to be about 25,800 cal/mol and 20,600 cal/mol for oxidation reaction. Gas patterns considering H2, CH4, C2H6, C2H4 and C2H2 for accelerated thermal aging test showed H2 domination pattern. Species of maximum hydrocarbon concentration shifted from CH4 to C2H6 and C2H4 as the reaction temperature increased from 200℃ to 250℃. During the initial stage of discharge test H2 was the major component. However, C2H2 which was hardly detected in thermal aging test became the maximum concentration species as the discharge time increased.

References

전영갑, 강동식, 선종호, 김영석, "변압기 절연유 열화센서 진단용 계측기 개발 연구," 한국전기연구소 보고서 (1994)
Kamata Y, IEEE Trans. Electr. Insul., 21, 1045 (1986)
Andrzej BS, IEEE Elec. Insul. Magazine, 11, 8 (1995)
전민호, 전기기사, 4, 48 (1995)
Choi JK, M.S. Thesis, Seoul National Univ., Seoul, Korea (1990)
Musil R, IEEE Elec. Insul. Magazine, 11, 21 (1995) 
Lee JH, Kwak HR, Han MK, Trans. KIEE, 40, 799 (1991)
권태원, 서순교, 홍원표, 윤용범, "전력기기 예방진단 기술 연구," 한전기술연구원 보고서 (1987)
윤경석, 김택제, 오박균, 신규식, 심웅호, "재생절연유 경년 열화연구," 한전기술연구원 보고서 (1987)
Lamarre C, Crone JP, Duval M, IEEE Trans. Electr. Insul., 22, 57 (1987)
Sirai M, Ishii T, Makino M, IEEE Trans. Electr. Insul., 12, 266 (1977)
Szepes L, IEEE Trans. Electr. Insul., 17, 345 (1982)
남창현, "변압기 유중가스 상시 감시 시스템의 운용연구," 한전기술연구원 보고서 (1994)

The Korean Institute of Chemical Engineers. F5, 119, Anam-ro, Seongbuk-gu, 233 Spring Street Seoul 02856, South Korea.
Phone No. +82-2-458-3078FAX No. +82-507-804-0669E-mail : kiche@kiche.or.kr

Copyright (C) KICHE.all rights reserved.

- Korean Chemical Engineering Research 상단으로