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Insulation structure design and verification of 1 100 kV epoxy resin impregnated paper capacitive bushing at grid side of converter transformer
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Xianshan GUO1, Li CHEN1, Huaping SHAN1, Wenfeng LIAO1, Kunhan WANG2, Xin WANG1, Yunxuan ZHANG1, *
Insulating Materials | 2026, 59(2) : 135 - 141
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Insulating Materials | 2026, 59(2): 135-141
Insulation structure design and verification of 1 100 kV epoxy resin impregnated paper capacitive bushing at grid side of converter transformer
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Xianshan GUO1, Li CHEN1, Huaping SHAN1, Wenfeng LIAO1, Kunhan WANG2, Xin WANG1, Yunxuan ZHANG1, *
Affiliations
  • 1DC Technical Center of State Grid Corporation of China, Beijing 100052, China
  • 2State Grid East Inner Mongolia Electric Power Research Institute, Hohhot 010010, China
Published: 2026-02-20 doi: 10.16790/j.cnki.1009-9239.im.2026.02.015
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The 1 100 kV bushing at the grid side of converter transformer in the converter station commonly adopts oil-impregnated paper capacitive bushing technology, which has prominent issues with abnormal gas production, prone to oil leakage and internal discharge failures. In order to improve the safety and reliability of 1 100 kV grid side bushings, we designed an epoxy resin impregnated paper capacitive bushing at the grid side of converter transformer. Firstly, the insulating materials, insulation structure, insulation coordination, and manufacturing processes of the bushing were studied. Secondly, the theoretical design of the bushing capacitive core was completed, and the designed product was simulated and analyzed using the finite element method. Finally, the prototype was produced and type tests were conducted. The results show that the simulation results of electric field distribution, hot-spot temperature, and mechanical stress of the newly developed 1 100 kV epoxy resin impregnated paper capacitive bushing all meet the application requirements, with an improvement of 3% in electric field safety margin. This bushing has successfully passed the type tests according to domestic and international standards, and all assessment indicators meet expectations.

grid side of converter transformer  /  epoxy resin impregnated paper capacitive bushing  /  insulation design  /  insulation verification  /  test assessment
Xianshan GUO, Li CHEN, Huaping SHAN, Wenfeng LIAO, Kunhan WANG, Xin WANG, Yunxuan ZHANG. Insulation structure design and verification of 1 100 kV epoxy resin impregnated paper capacitive bushing at grid side of converter transformer[J]. Insulating Materials, 2026 , 59 (2) : 135 -141 . DOI: 10.16790/j.cnki.1009-9239.im.2026.02.015
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Year 2026 volume 59 Issue 2
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doi: 10.16790/j.cnki.1009-9239.im.2026.02.015
  • Receive Date：2025-05-28
  • Online Date：2026-09-10
  • Published：2026-02-20
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  • Received：2025-05-28
  • Revised：2025-08-15
Affiliations
    1DC Technical Center of State Grid Corporation of China, Beijing 100052, China
    2State Grid East Inner Mongolia Electric Power Research Institute, Hohhot 010010, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2026.02.015
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
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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