Study on Pyrolysis Characteristics of Fiber Reinforced Plastic Rod of Composite Insulators Based on TG-FTIR Analysis
Xie Congzhen1, Zeng Leilei1, Gan Yongye1, Ben Cheng1, Zhou Fusheng2
1. School of Electrical Power South China University of Technology Guangzhou 510640 China; 2. China South Power Grid International Co. Ltd Guangzhou 510080 China
Abstract：In recent years, abnormal heating phenomenon have occurred in composite insulators of AC 500 kV transmission lines in China, which have brought potential trouble to the safely operation of transmission lines. In order to study the mechanism of thermal decomposition of the composite insulator core, the article adopted the thermogravimetric infrared technology (TG-FTIR) and distributed activation energy model (DAEM), discussed the pyrolysis process and gas production law at different heating rate. The results show that both TG and DTG curves of the mandrel exhibit an identical variation tendency under different heating rates, and the initial and final temperatures of the pyrolysis move upwards with the increase of heating rate. The weight loss occurs mainly in the temperature ranging from 270~620℃, which can be divided into two stages. In the first stage (270~470℃), the thermal weight loss of the mandrel is mainly caused by decomposition of the epoxy resin matrix, during which the main gases products are aldehydes, ketones, acids and CH4. In the second stage (470~620℃), the thermal weight loss is due to the further oxidation of the residues produced by pyrolysis, the main gases outcome in this process are H2O, CO2 and CO. The apparent activation energy during the pyrolysis ranges from 104~524kJ/mol, and the increase and decrease of activation energy correspond to the first and second stage of the pyrolysis, respectively. Those results provide theoretical references for further relevant studies.
谢从珍, 曾磊磊, 甘永叶, 贲成, 周福升. 基于热重红外联用的复合绝缘子芯棒热解特性研究[J]. 电工技术学报, 2018, 33(zk1): 227-233.
Xie Congzhen, Zeng Leilei, Gan Yongye, Ben Cheng, Zhou Fusheng. Study on Pyrolysis Characteristics of Fiber Reinforced Plastic Rod of Composite Insulators Based on TG-FTIR Analysis. Transactions of China Electrotechnical Society, 2018, 33(zk1): 227-233.
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2018, Vol. 33 
