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| Influence of Corrosive Sulfur in Transformer Oil on the Copper Wire and Oil Immersed Insulation Paper |
| Ren Shuangzan, Cao Xiaolong, Zhong Lisheng |
| State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an 710049 China |
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Abstract In order to research the influence of corrosive sulfur in transformer oil on the copper wire and oil immersed insulation paper, a series of thermal aging tests was carried on one kinds of Nynas oil, which had been running for five year on field, in the laboratory. The surface’s color changing, microstructure and elements component of copper line and insulation paper were analyzed by naked eyes’ examination and via scanning electron microscope (SEM) together with energy-dispersive X-ray (EDX) analyzer; the dissipation factor and permittivity of oil immersed insulation paper while before and after aging were measured by broad frequency dielectric spectroscopy, and its breakdown strength was tested as well. The results show that: the color changing of copper surface represents its corrosive level. The oxygen concentration in oil has no significant effect on the reaction between dibenzyl disulfide (DBDS) and copper, but would affect the deposited condition of copper sulfide (Cu2S) on copper wire and insulation paper surface, when there are Cu2S deposited, the copper wire surface structure and insulation paper fiber structure would change a lot, moreover, the dielectric properties of oil immersed paper would decrease. All of the above results are the basic experiment foundation for a further study on the risk of corrosive sulfur in transformer oil and related mechanisms.
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Received: 04 January 2010
Published: 07 March 2014
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[1] Lance R Lewand. Corrosive sulfur in oils, and transformers; why it is such a problem[C]. Doble Presentation at IEEE/PES transformers committee 2005 fall meeting, Memphis, America, 2005: 23-27.
[2] Dahlund M, et al. Failures due to copper sulphide in transformer insulation[J]. Energize, April, 2006: 20-23.
[3] 钱艺华, 姚唯建, 周永言. 变压器油中腐蚀性硫研究[J]. 广东电力, 2007, 20(11): 38-40.
Qian Yihua, Yao Weijian, Zhou Yongyan. Research on corrosive sulfur in transformer oil[J]. Guangdong Electric Power, 2007, 20(11): 38-40.
[4] 钱艺华, 胡红红, 姚唯建. 腐蚀性硫导致变压器故障的综合分析及处理[J]. 变压器, 2008, 45(1): 28-30.
Qian Yihua, Hu Honghong, Yao Weijian. Analysis and treatment of transformer fault caused by corrosive sulfur[J]. Transformer, 2008, 45(1): 28-30.
[5] 彭伟, 陆志浩, 黄华, 等. 大型变压器绝缘油含硫量测试方法及腐蚀性硫初步研究[J]. 华东电力, 2008, 36(1): 61-63.
Peng Wei, Lu Zhihao, Huang Hua, et al. Research on oil sulfur erosion of large scale transformer[J]. East China Electric Power, 2008, 36(1): 61-63.
[6] CIGRE WG A2-32. Copper sulphide in transformer insulation[R], May 2006.
[7] Scatiggio F, Tumiatti V, Maina R, et al. Corrosive sulfur in insulating oils: its detection and correlated power apparatus failures[J]. IEEE Transaction on Power Delivery, 2008, 23(1): 508-509.
[8] CIGRE WG A2-32. Copper sulphide in transformer insulation[R], 2009.
[9] Lance R Lewand. The negative effects of corrosive sulfur on transformer components[J]. Neta World, Spring, 2004: 1-4.
[10] Hajek J, Bennstam G, Dahlund M, et al. Quality of oil makes the difference, ABB discovers the solution to transformer breakdowns[J]. ABB Review, 2004: 61-63.
[11] Ren Shuangzan, Li Huaqiang, Zhong Lisheng, et al, Research on streaming electrification of insulation mineral oil[C]. IEEE 9th International Conference on the Properties and Application of Dielectric Materials, Harbin, China, 2009: 988-991.
[12] GB-T 1408. 1—2006, 绝缘材料电气强度试验方法 第1部分: 工频下试验[S].
[13] 金维芳. 电介质物理学[M]. 北京: 机械工业出版社, 1997.
[14] Toyama S, Tanimura J, Yamada N, et al. Highly sensitive detection method of dibenzyl disulfide and the elucidation of the mechanism[J]. IEEE Transac- tions on Dielectrics and Electrical Insulation, 2009, 16(2): 509-515. |
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2011, Vol. 26 
