高压电器2018，Vol.54Issue(5)：44-48,55,6.DOI:10.13296/j.1001-1609.hva.2018.05.007
基于热失重分析的盆式绝缘子热分解活化能的计算方法
Calculation Method of Thermal Decomposition Activation Energy of Basin-type Insulators Based on TG Analysis
摘要
Abstract
Gas-insulated metal-enclosed switches (GIS) are widely used in power systems. Among them, basin-type insulators have been subjected to aging degradation under the effect of electro thermal stress for a long time, and serious accidents may be caused in severe cases. Aging degradation of basin-type insulator is actually a chemical reaction process, so it is of great importance to study the thermal decomposition process of basin-type insulator. Based on the principle of thermal analysis, the thermal decomposition process of the basin-type insulator under five different heating rates is analyzed by TG method. The activation energy of the basin-type insulator is calculated by the Flynn-Wall-Ozawa method and the Kissinger method. The results show that the calculated results by the first method of Fly-nn-Wall-Ozawa method and Kissinger method are basically the same. The activation energy calculated by the second method of Flynn-Wall-Ozawa method initially increases with the increase of conversion rate. Peak at a conversion rate of 0. 12, then decrease slightly as the conversion rate increases and last gives a microscopic explanation of this phenomenon. The above research has certain guiding significance for accurately calculating the activation energy of the basin-type insulator, revealing the aging mechanism and evaluating the aging degree.关键词
GIS/盆式绝缘子/热分析动力学/活化能Key words
GIS/basin-type insulator/thermal analysis kinetics/activation energy引用本文复制引用
金虎,李锐海,孟晓波,任鹏,丛浩熹,李庆民..基于热失重分析的盆式绝缘子热分解活化能的计算方法[J].高压电器,2018,54(5):44-48,55,6.基金项目
国家自然科学基金(51477051,51737005) （51477051,51737005）
南方电网公司科技项目(SEPRI-K175010).Project Supported by the National Natural Science Foundation of China(51477051,51737005),the Southern Power Grid Technology Research Proiect(SEPRI-K175010). （SEPRI-K175010）
