电工技术学报  2018, Vol. 33 Issue (7): 1616-1625    DOI: 10.19595/j.cnki.1000-6753.tces.170110
高电压与绝缘 |
电场对变压器绕组油纸绝缘油硫腐蚀的影响及机理研究
杨丽君1, 张将1, 陆云才2, 蔚超2, 高思航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. 国网江苏省电力公司电力科学研究院 南京 211102
Study on Influence and Mechanismof Oil Sulfur Corrosion in Oil-Paper Insulation of Transformer Winding under the Electric Field
Yang Lijun1, Zhang Jiang1, Lu Yuncai2, Wei Chao2, Gao Sihang1
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China;
2. Electric Power Research InstituteState Grid Jiangsu Electric Power CompanyNanjing 211102 China
全文: PDF (22264 KB)  
输出: BibTeX | EndNote (RIS)      
摘要 为了探究电场对变压器绕组油纸绝缘油硫腐蚀的影响及机理,在实验室将Pig-tail绕组模型浸渍于添加了典型腐蚀性硫——二苄基二硫(DBDS)的绝缘油中,在交、直流电场和热(130℃)联合作用下开展20天的油硫腐蚀试验,对腐蚀试验后的绝缘绕组和绝缘油的理化性能和电气性能参数以及绝缘纸上硫化亚铜沉积量进行测试,对比分析电场对绕组硫腐蚀的影响规律和作用机制。结果表明:相比于单一热作用,交流和直流电场的加入均能加速油硫腐蚀过程,且电场强度越大,加速效果越明显。交流电场作用下,绕组模型两电极的腐蚀程度相当;而直流电场作用下,两电极腐蚀程度不对称,与直流高压电源极性相关。分析认为,电场作用下两电极的铜条形成电解池,并发生电化学腐蚀,电极表面析出的铜离子是加速油硫腐蚀进程的主要原因。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
杨丽君
张将
陆云才
蔚超
高思航
关键词 变压器油硫腐蚀绝缘油电-热联合油纸绝缘    
Abstract:In order to study the effect of corrosive sulfur in transformer oil on the performance of Oil-paper Insulation under electric field, a typical kind of corrosive sulfur-dibenzyl disulfide (DBDS) was added into the transformer insulating oil with Pig-tail winding modelunder laboratory conditions, carried out oil sulfur corrosion test under AC and DC electric field with thermal aging at 130℃for 20 days.The physicochemical properties and electrical properties of the insulating oil aged after electro-thermal impact were tested and the sulfur corrosion mechanism under the effect of electric field was studied and obtained. The results showed that the addition of AC and DC electric field could accelerate the corrosion process, and the greater the electric field intensity was, the more obvious the effect occurred. Under the AC electric field, the corrosion degree of two electrodes was similar, but under the DC electric field, the corrosion degree of two electrodes was asymmetric, which is related to the polarity of the DC high voltage power supply. It is analyzed that the copper strips of the two electrodes formed an electrolytic cell and the electrochemical corrosion occurred, copper ion released from the surface of the electrode was the main reason to accelerate the sulfur corrosion process in oil.
Key wordsTransformer    oil sulfur corrosion    insulating oil    electro-thermal    oil-paper insulation   
收稿日期: 2017-02-08      出版日期: 2018-04-12
PACS: TM855  
基金资助:国家电网公司科技项目资助(J2017034)
通讯作者: 张 将男,1993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。E-mail:2544723715@qq.com   
作者简介: 杨丽君女,1980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。E-mail:yljcqu@cqu.edu.cn
引用本文:   
杨丽君, 张将, 陆云才, 蔚超, 高思航. 电场对变压器绕组油纸绝缘油硫腐蚀的影响及机理研究[J]. 电工技术学报, 2018, 33(7): 1616-1625. Yang Lijun, Zhang Jiang, Lu Yuncai, Wei Chao, Gao Sihang. Study on Influence and Mechanismof Oil Sulfur Corrosion in Oil-Paper Insulation of Transformer Winding under the Electric Field. Transactions of China Electrotechnical Society, 2018, 33(7): 1616-1625.
链接本文:  
https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170110          https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I7/1616