套管硫腐蚀及其对油纸绝缘性能的影响  

Oil-sulfur Induced Corrosion in Bushing and its Effect on Oil-paper Performance

作　　者：刘国勇 袁媛[2] 任啸 廖瑞金[1] 周江[1] 姜有东 Guoyong LIU;Yuan YUAN;Xiao REN;Ruijin LIAO;Jiang ZHOU;Youdong JIANG(State Key Laboratory of Transmission & Distribution Equipment and Power System Safety and New Technology, Chongqing University, Chongqing 400044, China;College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;Electric Power Research Institute, State Grid Chongqing Electric Power Company, Chongqing 401123, China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆大学材料科学与工程学院,重庆400044 [3]国网重庆市电力公司电力科学研究院,重庆401123

出　　处：《腐蚀科学与防护技术》2019年第2期137-143,共7页Corrosion Science and Protection Technology

基　　金：国家自然科学基金(51677015和51407018)~~

摘　　要：为了探索高压套管中铜芯与铝箔的油硫腐蚀问题,将铜-纸-铝交替缠绕的套管模型浸入含有不同浓度腐蚀性硫(DBDS)的绝缘油中,在130℃下进行40d热腐蚀实验。对铜芯,铝箔的腐蚀情况和腐蚀产物在油纸中生成情况进行了研究。结果表明:Cu和Al均发生了明显腐蚀现象。随着时间增加和DBDS浓度增大,绝缘纸上Cu2S沉积量增大,Cu和Al含量也增大,导致介电常数和介质损耗增大。随着DBDS浓度增大,绝缘油中Cu和Al含量增大,导致介损增大和击穿电压降低。Corrosion behavior of simulated high voltage bushing models in insulation oil with different concentration of dibenzyl disulfide (DBDS) was assessed at 130 ℃ for 40 d in order to understand the sulfur induced corrosion of Cu core and Al foil in bushings. In addition, corrosion products of Cu core and Al-foil were characterized, while their effect on insulating properties was also discussed. Results show that the corrosion of Cu core and Al foil became severer when corrosion time and the concentration of DBDS increased. The deposited amount of Cu and Al on the insulation paper and oil increased with the increasing time and concentration of DBDS. The dielectric loss and dielectric constant of the insulation paper increased with increasing deposition of Cu2S. The dielectric loss increased and the breakdown voltage decreased with increasing amount of Cu and Al in the insulation oil.

关 键 词：变压器套管 油硫腐蚀 油纸绝缘性能 铝箔 

分 类 号：TG172[金属学及工艺—金属表面处理]