利用铜离子质量分数监测变压器中硫腐蚀状态的研究  

Condition Monitoring of Corrosive Sulfur Reaction in Transformer by Copper Ion Analysis

作　　者：万涛[1] 钱晖[1] 冯兵[1] 周舟[1] 龚尚昆[1] 

机构地区：[1]湖南省电力公司科学研究院,长沙410007

出　　处：《高电压技术》2013年第5期1128-1134,共7页High Voltage Engineering

基　　金：国家自然科学基金(51007021)~~

摘　　要：为了研究变压器中硫腐蚀作用的监测方法,考察了40台运行变压器油中铜离子质量分数与腐蚀性硫测试结果的关系。将变压器油样品充入氮气、空气和氧气条件下进行了腐蚀过程动态模拟试验,确定了铜腐蚀过程中油中铜离子和铜片表面元素含量变化的规律和氧气含量的影响。结果表明,铜离子质量分数检测与腐蚀性硫试验一致性>70%,油中铜离子和铜片表面硫化亚铜离子质量分数随腐蚀过程不断增加,通过铜离子质量分数检测能够有效监测变压器铜腐蚀状态;腐蚀性硫试验中铜片颜色能够准确反映硫化亚铜离子质量分数变化.不含氧气时,铜的腐蚀过程主要为铜→铜复合离子→硫化亚铜,含氧气时铜的腐蚀过程同时具有铜→氧化铜→铜复合离子→硫化亚铜和铜→铜复合离子→硫化亚铜。In order to investigate monitoring methods of sulfur corrosion in transformer,the copper content in oil and the sulfur-corrosion test results of 40 operating transformers were compared.Moreover,dynamic copper strip corrosion was tested by simulation in transformer oil samples filled with nitrogen,air and oxygen,respectively,and the change of copper content in oil and copper sulfide on copper strip and the influence of oxygen in the corrosion process were determined.The results showed that the consistency between the copper content tests and the corrosive sulfur tests exceeded 70%.The amounts of copper ion in oil and cuprous sulfide on copper strip both increased while the corrosion developed,indicating that copper corrosion of a transformer could be effectively monitored through copper content analysis.Meanwhile,corrosive sulfur tests could accurately reflect the accumulation of cuprous sulfide on copper strip from the color of copper strip.In the absence of oxygen,the main copper corrosion process should be copper→copper complex ion→cuprous sulfide,and the oxygen-contained copper corrosion process includes both copper→copper oxide→copper complex ion→cuprous sulfide and copper→copper complex ion→cuprous sulfide.

关 键 词：变压器 变压器油 铜 腐蚀性硫 绝缘纸 硫化亚铜 

分 类 号：TM406[电气工程—电器]