【摘要】：為了探索適用于天然酯絕緣油的油中溶解氣體分析方法(DGA),需要研究特征氣體在天然酯絕緣油中的溶解特性。以FR3~?絕緣油、精煉大豆絕緣油和甲酯化菜籽絕緣油等天然酯絕緣油為研究對象,以25號礦物絕緣油為參照,測定了溫度為30~70℃時H_2、CO、CO_2、CH_4、C_2H_4、C_2H_6、C_2H_2等7種故障診斷特征氣體在4種絕緣油中的Ostwald平衡常數(K)。通過對K和溫度(θ)的擬合,得到7種特征氣體在4種絕緣油中的28組K-θ模型方程,該方程可以推算其他溫度下任意特征氣體在絕緣油中的K。通過各特征氣體在同一種絕緣油中K-θ變化曲線對比發(fā)現:4種絕緣油中烴類氣體的溶解度大小順序為:K(C_2H_6)K(C_2H_4)≈K(C_2H_2)K(CH_4);非烴類氣體溶解度大小順序為:K(CO_2)K(CO)K(H_2)。
[Abstract]:In order to explore the analytical method of dissolved gas in oil suitable for natural ester insulating oil (DGA), it is necessary to study the dissolution characteristics of characteristic gas in natural ester insulating oil. With FR3~? Natural ester insulating oils, such as insulating oil, refined soybean insulating oil and methyl ester rapeseed insulating oil, were studied. Taking mineral insulating oil No. 25 as a reference, the determination of H2COCOCO-CO2CH4C2H4C2H4 at 30 ~ 70 鈩，

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