变压器油中Cu2 S生成规律及影响

doi:10.11930/j.issn.1004-9649.2016.12.031.06

中国电力 ›› 2016, Vol. 49 ›› Issue (12): 31-36.DOI: 10.11930/j.issn.1004-9649.2016.12.031.06

变压器油中Cu2 S生成规律及影响

何志满，王剑飞

国网重庆市电力公司万州供电分公司，重庆 404000

收稿日期:2016-02-19 修回日期:2016-12-29 出版日期:2016-12-20 发布日期:2016-12-29
作者简介:何志满（1986—），男，重庆人，博士，工程师，从事高电压与绝缘技术研究及输变电设备在线监测与智能化故障诊断技术研究。E-mail: hezhiman@cqu.edu.cn

Formation Pattern and Effect of Copper Sulfide in Transformer Oil

HE Zhiman, WANG Jianfei

State Grid Chongqing Electric Power Company Wanzhou Power Supply Branch, Chongqing 404000, China

Received:2016-02-19 Revised:2016-12-29 Online:2016-12-20 Published:2016-12-29

摘要/Abstract

摘要： 变压器油中的腐蚀性硫可对变压器绝缘性能造成不良影响。为研究变压器油中腐蚀性硫对铜导线及油纸绝缘的影响特性，在实验室以某油品（油样1）为主要研究对象（以另一油品（油样2）作为对比），在130 ℃和150 ℃下进行加速热老化试验。通过分析老化过后的裸铜片、纸包铜片、绝缘纸和油样相关特性的变化，发现油样1具有明显的硫腐蚀性，而油样2没有这一特性；铜片表面及绝缘纸内表面的腐蚀程度随着老化时间的增加而加剧；Cu2S在绝缘纸表面的沉积不仅与腐蚀程度有关，还与老化时间有关；Cu2S的沉积会改变铜片的表面结构、绝缘纸的纤维分布以及油-纸复合绝缘介质的介电特性，沉积了Cu2S的复合介质，其击穿场强大大降低。关于变压器油腐蚀性硫防治措施的研究结果将另行详述。

关键词: 变压器油, 腐蚀性硫, 硫化亚铜, 油纸绝缘, 热老化试验

Abstract: The corrosive sulfur in transformer oil may cause bad impacts on the transformer insulation. In order to study the influence of corrosive sulfur in transformer oil on the copper line and the oil immersed insulation paper, a series of thermal aging tests are carried out on Oil Samples 1 and 2 at 130 ℃ and 150 ℃ in laboratory. By analyzing the property changes of bared copper line, paper wrapped copper line, paper and oil, Sample 1 exhibits strong sulfur corrosiveness while Sample 2 does not. In addition, the corrosion on the copper line surface and the insulating paper inner surface deteriorates with the aging time. The Cu2S deposition on the insulating paper is related to not only the severity of corrosion, but also the aging time. Moreover, it may change the copper line surface structure and the insulation paper fiber distribution significantly, as well as the dielectric properties of oil immersed paper. With Cu2S deposition, the breakdown field of a strong composite medium will also decrease substantially. The study results on corresponding corrosion preventive measures will be elaborated separately.

Key words: transformer oil, corrosivity sulfur, copper sulfide, oil-paper insulation, thermal aging test

中图分类号:

TM411

何志满，王剑飞. 变压器油中Cu2 S生成规律及影响[J]. 中国电力, 2016, 49(12): 31-36.

HE Zhiman, WANG Jianfei. Formation Pattern and Effect of Copper Sulfide in Transformer Oil[J]. Electric Power, 2016, 49(12): 31-36.

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变压器油中Cu2 S生成规律及影响

Formation Pattern and Effect of Copper Sulfide in Transformer Oil

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变压器油中Cu2 S生成规律及影响

Formation Pattern and Effect of Copper Sulfide in Transformer Oil

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