Effects of sulfur corrosion on the properties of oil–paper insulation induced by dibenzyl disulfide
Effects of sulfur corrosion on the properties of oil–paper insulation induced by dibenzyl disulfide
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DOI：
10.1109/tdei.2019.007866
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发表时间：
2019-08
影响因子：
3.1
通讯作者：
Si-hang Gao;Lijun Yang
中科院分区：
文献类型：
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作者：
Si-hang Gao;Lijun Yang
二苄基二硫（DBDS）是一种具有腐蚀性的硫，是油浸绝缘中一种有效的抗氧剂。通过IEC 62535规定的加热实验，探讨了腐蚀性硫与铜的反应机理。在130 °C氮气气氛下进行热老化实验，研究DBDS的抗氧化性和腐蚀性对油纸绝缘性能的综合影响。实验结果表明，DBDS在高温下会分解为具有腐蚀性的苄基醚。二苄基硫醚在150 °C下不能腐蚀铜形成硫化铜。此外，DBDS的抗氧化性和腐蚀性取决于DBDS浓度的动态变化。本研究建议将25 mg/kg作为油脂中DBDS的最大添加量。采用此添加剂含量，可提高油的抗氧化性，并在一定程度上控制绝缘绕组的腐蚀损坏。
As a corrosive sulfur, dibenzyl disulfide (DBDS) is an efficient antioxidant in oil-immersed insulation. This study explored the reaction mechanism of corrosive sulfur with copper through heating experiments stipulated by IEC 62535. Thermal aging experiments were further conducted at 130 °C under nitrogen to investigate the comprehensive effect of the oxidation resistance and corrosivity of DBDS on the properties of oil-paper insulation. Experimental results showed that DBDS can decompose into corrosive benzyl mercaptan at a high temperature. Dibenzyl sulfide cannot corrode copper to form copper sulfide at 150 °C. Furthermore, the oxidation resistance and corrosivity of DBDS depend on the dynamic change in DBDS concentrations. This study suggests that 25 mg/kg should be used as the maximum additive content of DBDS in oil. With this additive content, the oxidation resistance of oil can be improved, and the corrosion damage of insulation winding can be controlled to a certain extent.