Influence of DBPC in Insulating Oil on Aging Rate of Oil-Paper System and Production Characteristics of Furfural
Liao Ruijin1, Feng Dawei1, Deng Bangfei2, Lin Yuandi1
1.State Key Laboratory of Power Transmission Equipment & System Security and New TechnologyChongqing University Chongqing 400044 China; 2.Chongqing Electric Power Test and Research Institute Chongqing 401123 China
Abstract：Dibutylparactesol(DBPC)is the most commonly used antioxidant in insulating oil. The study indicated that adding dibutylparactesolto insulating oil influenced the aging of insulating paper and production of furfural in laboratory. To further study the impact of DBPC on the aging of oil-paper insulation system and furfural production, different concentrations of DBPC were added to the oil-immersed insulating paper system,which were aged at 130℃ then. After that, the DP of insulating paper and the content of furfural in insulating oil as well as paper were periodically measured. Finally, the effect of antioxidants on aging rate of paper, furfural production and furfural ageing assessment of transformer was analyzed. The following conclusions were obtained. Firstly, the existence of antioxidants in insulating oil accelerates the aging of insulating paper. Therefore, the appending proportion of antioxidants in insulating oil should be minimized on the premise that its good antioxidant property is guaranteed. Secondly, the addition of antioxidants in insulating oil increases the furfural production and the lager amount of antioxidant was added, the more furfural was produced. Consequently, it is of vital significance to premeditate the amount of antioxidant in insulating oil when using furfural to evaluate the aging of transformer. Thirdly, the acid value of the oil increase when DBPC was added, and the hydrogen ions ionized by DBPC at high temperature is the main reason lead to paper accelerative age and increasingfurfural production.
廖瑞金, 冯大伟, 邓帮飞, 林元棣. 绝缘油中抗氧化剂DBPC对油纸绝缘老化速率及糠醛生成特性影响研究[J]. 电工技术学报, 2018, 33(7): 1652-1661.
Liao Ruijin, Feng Dawei, Deng Bangfei, Lin Yuandi. Influence of DBPC in Insulating Oil on Aging Rate of Oil-Paper System and Production Characteristics of Furfural. Transactions of China Electrotechnical Society, 2018, 33(7): 1652-1661.
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2018, Vol. 33 
