Insulation Thermal Aging Properties of Natural Ester Immersed Paper Comparing With That of Conventional and Thermally Upgraded Papers
Liao Ruijin1, Liang Shuaiwei2, Yang Lijun1, Wang Hongmei4, Sun Caixin1, Sun Huigang3
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China 2. Ningbo Electric Power Bureau Ningbo 315010 China 3. ABB Corporate Research Beijing 100016 China 4. Sichuan Electric Power Corporation Chengdu 610016 China
Abstract：In order to compare the properties of natural ester impregnated Kraft paper and thermally upgraded paper, sealed aging vessels containing copper, insulation paper (Kraft paper and thermally upgraded paper), and natural ester were aged at 90℃, 110℃, and 130℃ 399 days. The results show that both degree of polymerization(DP) and leveling-off degree of polymerization (LODP) for thermally upgraded paper were higher than the ones of Kraft paper at the same aging condition. The infrared spectrum evidence was given that there was dicyandiamide in thermally upgraded paper, and the aging resistance mechanisms of thermally upgraded paper were analyzed. Furfural can be absorbed by thermally upgraded paper and can be used to monitor the aging condition of a certain natural ester impregnated paper insulation. However, furfural can not be used to compare the aging condition of different types of paper immersed in natural ester. The different disciplinarians of the water content in natural ester were analyzed and the suggestion is given that the thermally upgraded paper are more suitable for natural ester impregnated paper insulation.
廖瑞金, 梁帅伟, 杨丽君, 王红梅, 孙才新, 孙会刚. 天然酯-普通纸（或热稳定纸）绝缘热老化特性[J]. 电工技术学报, 2009, 24(12): 12-17.
Liao Ruijin, Liang Shuaiwei, Yang Lijun, Wang Hongmei, Sun Caixin, Sun Huigang. Insulation Thermal Aging Properties of Natural Ester Immersed Paper Comparing With That of Conventional and Thermally Upgraded Papers. Transactions of China Electrotechnical Society, 2009, 24(12): 12-17.
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2009, Vol. 24 
