At present, there are few studies on the influence of antioxidants on the protective effect of transformer oil paper insulation system and passivator. Therefore, the widely used antioxidant DBPC(dibenzyl disulfide), passivator Irgamet 39, sulfides dibenzyl disulfides and dodecyl mertan were selected and simulated by reaction molecular dynamics. By measuring the van der Waals energy, mean square displacement, elastic modulus and the number of hydrogen bonds, the effects of different contents of antioxidant DBPC molecules on the insulation properties of oil paper and the protective effect of passivating agents were studied. The results show that the amount of DBPC should be added according to the standard, that is, the antioxidant content in the transformer is between 0.15% and 0.3%. If it is greater than or less than this range, it will accelerate the aging of oil paper insulation to varying degrees and reduce its insulation performance. The DBPC-Cu complex produced by DBPC dissolves in the insulating oil, and then the cuprous sulfide is deposited on the insulating paper. Even if the content is added according to the standard content, the insulation performance of the insulating paper will be slightly affected. If DBPC is added according to the standard of 0.15%~0.3%, it has little effect on the insulation performance of the transformer oil-paper insulation system, and has almost no effect on the protection effect of passivator.
LI Guan-nan, DAI Jing-qi, DONG Ming, JIAO Zai-bin, ZHENG Lu, LIU Xin-rong.
Effect of Antioxidant DBPC on Protection Performance of Passivator in Oil Paper Insulation System of Transformer[J].
Science Technology and Engineering, 2026, 26(2): 655-662 DOI:10.12404/j.issn.1671-1815.2502208
GaoSihang, YangLijun, DengBangfei, et al. Investigation on the influence of sulfur corrosion on insulation winding electrical life and the mechanism of insulation failure induced by copper sulfide[J]. High Voltage Engineering, 2020, 46(5): 1612-1621.
LiuDaosheng, ZhouChunhua, DingJin, et al. Research overview of oil-paper composite insulation modified by nano particles for transformer[J]. Transactions of China Electrotechnical Society, 2023, 38(9): 2464-2479, 2490.
HuXuechao, XueShouhong, SunLiqiang, et al. Effect of antioxidant types in transformer oil on thermal ageing performance of insulating paper[J]. Insulating Materials, 2023, 56(11): 47-52.
ZhouYuanxiang, LiuJun, WangJianyi, et al. Effect of the addition of isomeric non-naphthenic components on the physicochemical and electrical properties of naphthenic transformer oils[J]. High Voltage Engineering, 2022, 48(12): 4679-4687.
SuZiming, WuYingrui, ZengZhenglin, et al. Research progress on electrical properties of nano modified vegetable insulating oil[J]. Insulating Materials, 2024, 57(5): 1-9.
[13]
OthmanN A, ZainuddinH, YahayaM S, et al. Prerequisites for accelerated aging of transformer oil: a review[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2025, 32(1): 444-455.
WangJianyi, ZhouYuanxiang, ChengHuanchao, et al. Recent progress and prospect of hydroisomerized non-naphthenic transformer oil[J]. Proceedings of the CSEE, 2020, 40(16): 5373-5383.
[16]
RaoU M, SoodY R, JarialR K. Performance analysis of alternate liquid dielectrics for power transformers[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2016, 23(4): 2475-2484.
[17]
CongH X, PanH, QianD Y, et al. Reviews on sulphur corrosion phenomenon of the oil-paper insulating system in mineral oil transformer[J]. High Voltage, 2021, 6(2): 193-209.
[18]
LyutikovaM N, KorobeynikovS M, RidelA V. Method for reducing sediment formation in transformer oil[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2024, 31(4): 2208-2215.
ZhouPan, YangWeiqi, TianChen, et al. Influence of adding different antioxidants on thermal aging properties of transformer oil-paper insulation[J]. Thermal Power Generation, 2022, 51(8): 174-179.
[21]
ZhangH, ZhangZ, YanJ, et al. Revealing the intrinsic correlation between cu scales and free radical chain reactions in the regulation of catalytic behaviour[J]. Molecules, 2024, 29(19): 1-13.
LinMusong, QianYihua, LiZhi, et al. Study on chemical diagnosis and processing technology for declination of transformer oil insulation performance[J]. Guangdong Electric Power, 2023, 36(7): 70-76.
CongHaoxi, PanHao, ZhangMinhao, et al. Protection effectiveness of multiple corrosive sulfurs on transformer oil and their effect on oil quality[J]. High Voltage Engineering, 2020, 46(8): 2864-2871.
[26]
FilhoA A P, LunaF M T, CavalcanteC L. Oxidative stability of mineral naphthenic insulating oils: optimization of commercial antioxidants and metal passivators[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2019, 26(1): 240-246.
[27]
YangL, GaoS, LiJ, et al. Influence of the antioxidant on the long-term ageing characteristics of oil-paper insulation and the deposition and migration of copper sulphide in oil-immersed transfor-mers[J]. IET Electric Power Applications, 2016, 10(7): 675-680.
ZhengLu, DaiJingqi, GaoGuofeng, et al. Micromechanism of protective effect of metal passivator against multiple sulfides in power transformers[J]. Science Technology and Engineering, 2024, 24(36): 15497-15503.
[30]
RaghuP, MurugesanM. Molecular interactions of the antioxidant in the coolant oil for energy transformers: dielectric and simulation studies[J]. Journal of Molecular Liquids, 2024, 411: 1-11.
[31]
ObebeE O, HadjadjY, OparantiS O, et al. Enhancing the performance of natural ester insulating liquids in power transformers: a comprehensive review on antioxidant additives for improved oxidation stability[J]. Energies, 2025, 18(7): 1-16.
Guodian Thermal Engineering Research Institute. Operatingtransformeroilmaintenancemanagementguidelines:GB/T14542—2005[S]. Beijing: Standards Press of China, 2005.
[34]
DuD, TangC, ZhangJ, et al. Effects of hydrogen sulfide on the mechanical and thermal properties of cellulose insulation paper: a molecular dynamics simulation[J]. Materials Chemistry and Physics, 2020, 240(15): 1-12.