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Creeping Discharge Characteristics of Three-element Mixed Insulating Oil-paper Composite System Under Needle-plate Electrode Structure
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Xin CHEN1, 2, Jian HAO2, Chenyu GAO2, Dawei FENG2, Ruijin LIAO2, Wenyu YE2
Insulating Materials | 2022, 55(1) : 52 - 61
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Insulating Materials | 2022, 55(1): 52-61
• Insulation Technology •
Creeping Discharge Characteristics of Three-element Mixed Insulating Oil-paper Composite System Under Needle-plate Electrode Structure
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Xin CHEN1, 2, Jian HAO2, Chenyu GAO2, Dawei FENG2, Ruijin LIAO2, Wenyu YE2
Affiliations
  • 1State Grid Wuxi Power Supply Company, Wuxi 214000, China
  • 2State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
Published: 2022-01-20 doi: 10.16790/j.cnki.1009-9239.im.2022.01.009
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On the basis of a new type of three-element mixed insulating oil with excellent physichemical and electrical properties, and taking the mineral insulating oil-paper composite system as a reference, the creeping discharge characteristics of the three-element mixed insulating oil-paper composite system were analyzed under needle-plate electrode structure. The electric field distribution of two insulating oil-paper composite systems were simulated under needle-plate electrode structure. On the basis of density functional theory, the energy band structures of natural ester molecule and mineral oil molecule were studied comparatively. The results show that compared with the mineral insulating oil-paper composite system, the three-element mixed insulating oil-paper composite system has smaller partial discharge inception voltage, flashover voltage and larger maximum discharge magnitude, discharge pulse number under creeping discharge fault. There is small difference on electric field distribution between two insulating oil-paper composite systems under needle-plate electrode structure. The energy gap of palm oil molecule and soybean oil molecule in mixed oil are smaller than that of the mineral oil molecule, therefore, the mixed oil molecule is more likely to ionize under strong electric field.

mixed oil  /  creeping discharge  /  needle-plate electrode  /  energy band structure
Xin CHEN, Jian HAO, Chenyu GAO, Dawei FENG, Ruijin LIAO, Wenyu YE. Creeping Discharge Characteristics of Three-element Mixed Insulating Oil-paper Composite System Under Needle-plate Electrode Structure[J]. Insulating Materials, 2022 , 55 (1) : 52 -61 . DOI: 10.16790/j.cnki.1009-9239.im.2022.01.009
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.01.009
  • Receive Date：2021-02-27
  • Online Date：2025-12-23
  • Published：2022-01-20
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History
  • Received：2021-02-27
  • Revised：2021-11-18
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Affiliations
    1State Grid Wuxi Power Supply Company, Wuxi 214000, China
    2State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
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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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