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Study on enhancing transformer oil-paper insulation performance based on plasma technology
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Ming WANG1, Aiwu GUO1, Bifang CHEN2, Runhua LI1, *, Xiaoli LIU3, Changjun TANG4, Xinglei CUI5
Insulating Materials | 2026, 59(5) : 95 - 103
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Insulating Materials | 2026, 59(5): 95-103
• Insulation Technology •
Study on enhancing transformer oil-paper insulation performance based on plasma technology
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Ming WANG1, Aiwu GUO1, Bifang CHEN2, Runhua LI1, *, Xiaoli LIU3, Changjun TANG4, Xinglei CUI5
Affiliations
  • 1Shenyang Branch of National Energy Group Science and Technology Research Institute Co., Ltd., Shenyang 110102, China
  • 2Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China
  • 3Liaoning Dongke Electric Power Co., Ltd., Shenyang 110122, China
  • 4Guoneng Shuangyashan Power Generation Co., Ltd., Shuangyashan 155136, China
  • 5College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China
Published: 2026-05-20 doi: 10.16790/j.cnki.1009-9239.im.2026.05.011
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To improve the oil-paper insulation performance in oil-immersed transformers, this paper utilized hexamethyldisilazane coupled with dielectric barrier discharge (DBD) plasma to modify cellulose insulation paper. The physical morphology and chemical composition of the surface and cross-section of the modified insulation paper were characterized, and the influence of the medium flow rate on the insulation paper properties and oil-paper insulation performance was investigated. The results show that at a medium flow rate of 15 mL/min, the oil-paper insulation performance is significantly enhanced. The dielectric constant of the modified insulation paper decreases to 2.5, the flashover voltage and electric strength increase by 33.8% and 25.0%, respectively, the water contact angle increases by 194.3%, and the water absorption decreases by 44.9%. Silicon-containing thin films are deposited on the surface of the insulation paper and penetrate into the interior of the fibers, which can introduce deep traps to restrict charge migration and fill the fiber pores with hydrophobic substances. The introduction of the low-polarity film reduces the dielectric constant of the insulation paper, mitigates the electric field distortion at the oil-paper interface, and improves the interfacial bonding ability of the oil-paper interface, thereby enhancing the oil-paper insulation performance.

cellulose insulating paper  /  oil-paper insulation  /  dielectric barrier discharge  /  film deposition with plasma  /  hexamethyldisilazane
Ming WANG, Aiwu GUO, Bifang CHEN, Runhua LI, Xiaoli LIU, Changjun TANG, Xinglei CUI. Study on enhancing transformer oil-paper insulation performance based on plasma technology[J]. Insulating Materials, 2026 , 59 (5) : 95 -103 . DOI: 10.16790/j.cnki.1009-9239.im.2026.05.011
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Year 2026 volume 59 Issue 5
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doi: 10.16790/j.cnki.1009-9239.im.2026.05.011
  • Receive Date：2025-07-16
  • Online Date：2026-09-10
  • Published：2026-05-20
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  • Received：2025-07-16
  • Revised：2025-10-14
Affiliations
    1Shenyang Branch of National Energy Group Science and Technology Research Institute Co., Ltd., Shenyang 110102, China
    2Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China
    3Liaoning Dongke Electric Power Co., Ltd., Shenyang 110122, China
    4Guoneng Shuangyashan Power Generation Co., Ltd., Shuangyashan 155136, China
    5College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2026.05.011
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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