한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.1
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- Pages.100-103
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- 2003
가속열화 방법에 의한 주상변압기 절연물의 열열화 특성 평가
The Evaluation of Thermal Aging Characteristics in Insulating Paper for the Use of the Pole Transformers
- Lee, Byung-Sung (KEPRI KEPCO) ;
- Song, Il-Keun (KEPRI KEPCO) ;
- Lee, Jae-Bong (KEPRI KEPCO) ;
- Park, Dong-Bae (KEPRI KEPCO) ;
- Han, Sang-Ok (Chungnam Nat'l Univ.)
- 발행 : 2003.07.10
초록
The primary insulation system used in an oil-filled transformer is kraft paper, wood, porcelain and oil. Modern transformers use paper that is chemically treated to improve its tensile strength properties and resistance to aging caused by immersion in oil. But these insulation papers are mainly aged to thermal stress. Over the course of the insulation paper and oil's life it is exposed to high temperatures, oxygen and water. Its interaction with the steel of the tank and core plus the copper and aluminium of the windings will eventually cause the chemical properties of the oil to decay. High temperature have an effect on mechanical strength of cellulous paper using the layer insulation. We made two aging cell in which thermal aging tests of insulation papers and mineral oil are conducted. It is measured dielectric strength, number of acid, moisture, etc. of insulation paper and oil aged in the aging cells.