Effect of Atmospheric Pressure on Dissolved Gases Ostwald Coefficient in Insulating Oil

被引：0
|
作者：
Du Z. [1 ]
Zhang X. [1 ]
Zhu H. [1 ]
Yu X. [1 ]
Wang C. [1 ]
Liu T. [1 ]
机构：
[1] State Grid Jiangsu Electric Power Co., Ltd., Research Institute, Nanjing
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 08期
关键词：
atmospheric pressure factor; dissolved gas analysis; K[!sub]i[!/sub] value determination; Ostwald coefficient; solubility equilibrium;
D O I：
10.13336/j.1003-6520.hve.20220696
中图分类号：
学科分类号：
摘要：
In the process of the laboratorial dissolved gas analysis (dissolved gas analysis, DGA) on insulating oil, the head-space gas extraction method is a kind of routine oil-degassing method whose accuracy depends mainly on the accuracy of Ostwald coefficient Ki used in the calculation process. In this paper, based on different representation methods of dissolved gas concentration in oil, the effect of atmospheric pressure on the Ostwald coefficient is studied and analyzed by theoretical derivation and experimental exploration, respectively. Then, according to the obtained conclusions, in current related references and technical documents, some critical problems concerning characterization method of dissolved gas concentration in oil of the Ostwald coefficient are analyzed, and correction operations during measuring Ki value are presented. The study and discussion of related issues will be helpful to deepen the understanding and knowledge the dissolution equilibrium and Ostwald coefficient Ki, so as to avoid unnecessary errors in the determination and use of Ki, which may affect the accuracy of the Ki determination results and DGA results. In addition, this paper may also provide references for standards and references revision. © 2023 Science Press. All rights reserved.
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页码：3554 / 3561
页数：7
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