Development of Dissolved Gas Analysis System in Insulating Oil by Headspace Method

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  • ヘッドスペース法による油中ガス分析システムの開発
  • ヘッドスペースホウ ニ ヨル ユチュウ ガス ブンセキ システム ノ カイハツ

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Abstract

Abstract<br> Dissolved gas analysis in insulating oil is widely put to use as an important diagnosing method in the maintenance of oil immersed equipment such as transformers.<br> The headspace method which is described in this paper is a method for extracting gases by heating and shaking a vial.<br> It makes use of such a principle that the constituent concentration of the liquid phase portion and gas phase portion in the vial is dependent on the Ostwald coefficient.<br> The authors paid attention to the rationality of the headspace method several years ago, and have been studying application of this method plus the prospect of putting in into practical use.<br> Below are the results of the development and study in this paper;<br> 1. Being constituted as a gas analysis system, it is possible to perform the analysis at a high sensitivity and precision.<br> 2. Gas analysis can be performed with a sample of a small volume.<br> 3. The analysis time is short and it is possible to continuously analyze up to 44 samples.

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