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首页> 外文期刊>Dielectrics and Electrical Insulation, IEEE Transactions on >Influences of oxygen and 2,6-di-tert-butyl-p-cresol on copper sulfide deposition on insulating paper in oil-immersed transformer insulation
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Influences of oxygen and 2,6-di-tert-butyl-p-cresol on copper sulfide deposition on insulating paper in oil-immersed transformer insulation

机译：氧和2,6-二叔丁基对甲酚对油浸式变压器绝缘中绝缘纸上硫化铜沉积的影响

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摘要

Copper sulfide deposition on cellulosic insulating materials in oil-immersed transformers was investigated by heating tests stipulated by IEC 62535 with controlled atmospheres to which mineral insulating oils were exposed. Both oxygen in the atmosphere and 2,6-di-tert-butyl-p-cresol (DBPC) in the oil were found to accelerate the copper sulfide deposition on the insulating paper when the oil contains dibenzyl disulfide (DBDS). The weight of copper sulfide deposition on the insulating paper was found to increase when the oxygen concentration was increased up to 20 volume %. X-ray absorption near edge structure (XANES) analysis was applied to study the chemical bonding state of copper atoms in copper deposits on the insulating paper for the first time. It can be clarified the copper deposits on the insulating paper are mainly Cu2S and small amounts of CuO are contained.
机译：通过油浸式变压器的纤维素绝缘材料中硫化铜的沉积，通过IEC 62535规定的加热测试进行了研究，并在暴露于矿物绝缘油的受控气氛下进行。当油中含有二苄基二硫化物（DBDS）时，发现大气中的氧气和油中的2,6-二叔丁基对甲酚（DBPC）均可促进硫化铜在绝缘纸上的沉积。发现当氧浓度增加到20体积％时，硫化铜沉积在绝缘纸上的重量增加。首次采用X射线吸收近边缘结构（XANES）分析法研究了绝缘纸上铜沉积物中铜原子的化学键合状态。可以弄清绝缘纸上的铜沉积物主要是Cu 2 S和少量的CuO。

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