We have developed a new heating test to investigate the influence of dissolved copper (DBDS-Cu complex) and oxygen on copper sulfide generation in alkyl benzene insulating oil with dibenzyl disulfide (DBDS) added. The weight of the deposited and dissolved copper was systematically studied in atmospheres of nitrogen and artificial air. The copper sulfide was deposited on the insulating paper using the heating test by separating the insulating paper from the copper strips in the insulating oil. It was found that dissolved copper (DBDS-Cu complex) has influence to the copper sulfide generation on the insulating paper. The weight of the copper deposited on the insulating paper was increased by the existence of oxygen. The acceleration effect on copper sulfide deposition on insulating paper was clarified for the first time by strictly controlling the experimental atmosphere. Moreover, the influence of the existence of oxygen was investigated individually on insulating oil and insulating paper. The oxidation of both alkyl benzene and insulating paper was found to accelerate copper sulfide generation.
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Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R ChinaChongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
Yang, Li-jun
Gao, Si-hang
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Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R ChinaChongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
Gao, Si-hang
Deng, Bang-fei
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State Grid Chongqing Elect Power Res Inst, Chongqing 400015, Peoples R ChinaChongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
Deng, Bang-fei
Tang, Jie
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Chongqing Elect Power Corp, Chongqing 400014, Peoples R ChinaChongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
Tang, Jie
Huang, Jia-jia
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State Grid Wenzhou Elect Power Supply Co, Wenzhou 325000, Peoples R ChinaChongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China