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Oxidation Characteristic Changes in Insulation Oil Depending upon Storage Environments and Oil Resources

저장 환경 및 원료에 따른 전기절연유 산화특성 연구

  • Lee, Don-Min (Petroleum Technology R&D Center, Korea Petroleum Quality & Distribution Authority) ;
  • Park, Cheon-Kyu (Petroleum Technology R&D Center, Korea Petroleum Quality & Distribution Authority) ;
  • Ha, Jong-Han (Petroleum Technology R&D Center, Korea Petroleum Quality & Distribution Authority) ;
  • Lee, Bong-Hee (Dept. of Chemical Engineering, Chungbuk National University)
  • 이돈민 (한국석유관리원 석유기술연구소) ;
  • 박천규 (한국석유관리원 석유기술연구소) ;
  • 하종한 (한국석유관리원 석유기술연구소) ;
  • 이봉희 (충북대학교 공과대학 화학공학과)
  • Received : 2016.07.15
  • Accepted : 2016.08.12
  • Published : 2016.10.10

Abstract

Mineral oil has been widely used as an insulating oil for electrical transformers for a long time, but the necessity of employing new insulation oil such as vegetable oil has been increased due to urgent needs for the biodegradability when it leaks and also for the thermal stability at a higher operation temperature. Although specific periods are required between the production and consumption, there are still short of the data to prove the insulation oils' storage stability depending upon various circumstances and their resources. Thus, this paper demonstrates the insulation oils' oxidation characteristics of both mineral and vegetable oils when each was exposed to different environments for 12 weeks. From this test, some properties including total acid number, water content and dielectric breakdown were changed under specific conditions and resources. Vegetable oils showed higher hydrophilicity and water saturation than those of mineral oils due to their molecular compositions. Under sunlight exposure condition, all insulation oils oxidized and changed their properties when exposing to the direct light, regardless of the resource used.

Acknowledgement

Grant : 식물유 변압기 유중가스 관리기준 설정연구

Supported by : 전력연구원(KEPRI)

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