电工技术学报  2018, Vol. 33 Issue (7): 1652-1661    DOI: 10.19595/j.cnki.1000-6753.tces.170169
高电压与绝缘 |
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
廖瑞金1, 冯大伟1, 邓帮飞2, 林元棣1
1. 输配电装备及系统安全与新技术国家重点实验室(重庆大学)重庆400044
2. 国网重庆市电力科学研究院重庆401123
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
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摘要 二叔丁基对甲酚(DBPC)是绝缘油最常用的抗氧化剂,试验发现绝缘油中DBPC的添加量会影响绝缘纸老化速率和糠醛的产生。为确定DBPC对油纸绝缘系统老化及糠醛产生的影响,在实验室条件下使用添加不同浓度DBPC的绝缘油与绝缘纸组成油纸绝缘样品,在130℃下进行恒温老化。通过定期对绝缘纸的聚合度、绝缘油中糠醛含量以及绝缘纸中糠醛含量进行测量,分析抗氧化剂对绝缘纸老化、糠醛产生及糠醛评估变压器老化的影响。得出如下结论:绝缘油中添加抗氧化剂会加速绝缘纸的老化,建议工程中在能达到抗氧化性能的前提下降低绝缘油中抗氧化剂的添加比例,待DBPC部分消耗后勤于补加;DBPC会使绝缘纸老化到相同程度时糠醛产量提高,并且油中抗氧化剂添加量越大糠醛产量越多,因而建议运用糠醛评估变压器老化时需要区别变压器油中是否添加抗氧化剂或者考虑抗氧化剂的大致含量。油中添加DBPC后酸值增加,DBPC在高温下电离出的氢离子是绝缘纸加速老化和糠醛产量提高的主要原因。
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关键词 变压器二叔丁基对甲酚老化速率糠醛产量酸值    
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.
Key wordsTransformer    dibutylparactesol    aging rate    furfural production    acid value   
收稿日期: 2017-02-19      出版日期: 2018-04-12
PACS: TM407  
基金资助:国家电网公司科技项目(SGTJ0000KXJS1400075)和国家创新研究群体基金(51321063)资助
通讯作者: 冯大伟男,1992年生,硕士研究生,研究方向为电气设备绝缘在线监测与故障诊断等。E-mail:josaturday@163.com   
作者简介: 廖瑞金男,1963年生,博士,教授,研究方向为电气设备绝缘在线监测与故障诊断等。E-mail:rjliao@cqu.edu.cn
引用本文:   
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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