Effects of Metal Passivator Degradation on the Dissolved Gases Characteristics of Oil in Oil-immersed Transformers
Effects of Metal Passivator Degradation on the Dissolved Gases Characteristics of Oil in Oil-immersed Transformers
复制标题
金属钝化剂降解对油浸变压器油中溶解气体特性的影响
DOI：
10.1109/tdei.2021.009524
复制
发表时间：
2021-10
影响因子：
3.1
通讯作者：
Zhang Guowen
中科院分区：
文献类型：
--
作者：
Gao Sihang;Zeng Xisong;Zhang Guowen
硫腐蚀严重影响油浸式Transformer的绝缘性能，在绝缘油中添加苯并三氮唑钝化剂（BTA）来控制硫腐蚀已被广泛应用。然而，相关研究表明，在油中加入金属钝化剂会导致油中溶解气体的异常产生。因此，本研究进一步探讨了金属钝化剂降解对油浸变压器油中溶解气体特性的影响。对添加和不添加BTA的油纸绝缘进行了几次加速老化试验。结果表明，BTA的加入导致油中异常溶解气体的产生，沿着杂散气体的增加，尤其是H2、CO和CO2的增加。此外，总烃馏分的异常生产被发现，这可能会干扰DGA结果。最后，对绝缘油中杂散气体异常产生与BTA劣化的关系进行了初步分析和讨论。
Sulfur corrosion has been proven to significantly decrease the insulation performance of oil-immersed transformer and the addition of benzotriazole passivator (BTA) to insulating oil has been widely used to control the sulfur corrosion. However, the relevant studies indicate that the addition of metal passivator to oil can cause abnormal generation of dissolved gases in oil. Thus, this study further explores the effects of metal passivator degradation on the dissolved gas characteristics of oil in oil-immersed transformers. Several accelerated aging experiments on oil-paper insulations with and without BTA are conducted. The results indicate that the addition of BTA lead to the generation of abnormal dissolved gases in the oil along with an increase of stray gases, especially the increase of H2, CO and CO2. Moreover, an abnormal production of the total hydrocarbon fraction is found, which may interfere with the DGA results. Finally, the degradation of BTA related to abnormal production of stray gases in the insulating oil was preliminarily analyzed and discussed.