Concentration dependence of corrosive sulfur on copper-sulfide deposition on insulating paper used for power transformer insulation
Concentration dependence of corrosive sulfur on copper-sulfide deposition on insulating paper used for power transformer insulation
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DOI：
10.1109/tdei.2009.5293964
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发表时间：
2009-10
影响因子：
3.1
通讯作者：
T. Amimoto;N. Hosokawa;E. Nagao;J. Tanimura;S. Toyama
中科院分区：
文献类型：
--
作者：
T. Amimoto;N. Hosokawa;E. Nagao;J. Tanimura;S. Toyama
研究了硫化铜在电力Transformer绝缘用线圈绝缘纸上的沉积，旨在获得腐蚀性硫的浓度依赖性。几种含有二苄基二硫（DBDS）的矿物绝缘油，这是典型的腐蚀性硫引起硫化铜沉积，被用作样品油。热老化测试是在140摄氏度的空气气氛中进行长达1296小时的牛皮纸包裹和裸铜板。试验结果表明，沉积速率与DBDS浓度成正比，硫化铜沉积开始前的潜伏期与DBDS浓度成反比。这些浓度依赖性可以通过考虑三种化合物之间的平衡来推导，例如溶解的DBDS-Cu络合物在油中，吸附的DBDS-Cu络合物和沉积的硫化铜在绝缘纸上。
Copper-sulfide deposition on coil insulating paper used for power transformer insulation is investigated with the aim of obtaining the concentration dependence of corrosive sulfur. Several mineral insulating oils containing dibenzyl disulfide (DBDS), which is typical corrosive sulfur causing the copper sulfide deposition, are used as sample oils. Thermal aging tests are done at 140degC with an air atmosphere up to 1296 h with Kraft paper-wrapped and bare copper plates. The test results indicate that the deposition rate is proportional to the DBDS concentration and the incubation period before onset of the copper-sulfide deposition is inversely proportional to the DBDS concentration. These concentration dependences can be derived by considering equilibrium between three compounds such as dissolved DBDS-Cu complexes in the oil, adsorbed DBDS-Cu complexes and deposited copper-sulfide on the insulating paper.