Protective Performance of Different Passivators on Oil-Paper Insulation Containing Multiple Corrosive Sulphides
Protective Performance of Different Passivators on Oil-Paper Insulation Containing Multiple Corrosive Sulphides
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DOI：
10.1109/access.2018.2888818
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发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
Haoxi Cong;Minhao Zhang;Xiang Shu;Qingmin Li
中科院分区：
文献类型：
--
作者：
Haoxi Cong;Minhao Zhang;Xiang Shu;Qingmin Li
硫腐蚀问题严重影响了电力变压器的安全稳定运行。目前，在变压器油中加入钝化剂是抑制该问题最有效的方法。然而，没有明确规定特定钝化剂的最佳浓度。本文以含不同腐蚀硫含量和不同老化程度的变压器油为研究对象，研究了三种不同钝化剂的防护性能。通过对铜表面的比较，得到了各种钝化剂的最佳浓度。此外，通过测试加入最佳钝化剂浓度后绝缘油的击穿电压、介质损耗因子、体积电阻率和含水率，得到了三种钝化剂对绝缘油品质的影响。结果表明，三种钝化剂对不同类型的腐蚀性硫具有不同的防护性能。Irgamet 39在较低浓度下具有较好的保护作用。三种钝化剂对十二烷基硫醇的保护效果都较差，需要开发一种新型的十二烷基硫醇保护钝化剂。此外，三种钝化剂对不同老化程度的变压器油具有不同的保护性能。特别是对于运行年限较长或钝化剂浓度较低的油类，其防护性能较差。3种钝化剂中，Irgamet 39对油品质量影响最小，T571次之，TTA次之。上述研究可为指导实际工程中钝化剂的添加，防止硫腐蚀失效的发生提供一定的参考。
The problem of sulfur corrosion has seriously affected the safe and stable operation of the power transformers. Currently, adding passivators into the transformer oil is the most effective method to suppress the problem. However, no explicit provisions have been made for the optimum concentration of the specific passivators. In this paper, the transformer oils with different corrosive sulfurs and different aging degrees were used to study the protective performance of three different passivators. By comparing the copper surface, the optimum concentrations for each passivators were acquired. Moreover, by testing the breakdown voltage, dielectric loss factor, volume resistivity, and moisture content of the insulating oil after adding passivators with the optimal concentration, the effect of three passivators on the oil quality was obtained. Results show that the three passivators have different protective performance on different types of corrosive sulfurs. Irgamet 39 has a better protective effect at lower concentrations than the other two. The protective effect of all three passivators on dodecyl mercaptan is poor, and a new type of passivator capable of protecting against dodecyl mercaptan needs to be developed. Moreover, the three passivators have different protection performance on the transformer oils with different aging degrees. The protective performance is poor especially for the oils with longer running years or passivators with lower concentrations. Among the three passivators, Irgamet 39 had the smallest impact on the oil quality, followed by T571 and then TTA. The above research can provide some references for guiding the passivator addition in actual projects and preventing the occurrence of sulfur corrosion failures.