套管硫腐蚀及其对油纸绝缘性能的影响

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40 d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。

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

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.