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Study on space charge characteristics of epoxy resin composite for insulation support
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Peng WU1, Jingxin WANG2, Zhanfei LEI1, Dingxin WEI2, Lei SHI1, Yousu QIN1, Zongliang XIE2, Peng LIU2
Insulating Materials | 2023, 56(10) : 66 - 74
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Insulating Materials | 2023, 56(10): 66-74
• Insulation Technology •
Study on space charge characteristics of epoxy resin composite for insulation support
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Peng WU1, Jingxin WANG2, Zhanfei LEI1, Dingxin WEI2, Lei SHI1, Yousu QIN1, Zongliang XIE2, Peng LIU2
Affiliations
  • 1Ultra High Voltage Company of State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
  • 2State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
Published: 2023-10-20 doi: 10.16790/j.cnki.1009-9239.im.2023.10.009
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In order to explore the internal mechanism of the difference in space charge characteristics of epoxy based materials used for insulation support in ultra-high voltage power equipment, the dynamic characteristics of space charge of epoxy resin and micro-alumina/epoxy composites under different electrical and thermal environments were studied, and the trap distribution characteristics were discussed. The results show that the space charge distribution of epoxy resin and its composites exhibit obvious temperature characteristics and field strength characteristics. Under high temperature and high electric field strength, space charge is more easily injected from electrodes and migrates in the samples, and the amount of trapped charges increases. The high thermal conductivity of alumina fillers at high temperatures makes charge dissipation faster,and the charge accumulation of alumina/epoxy composite material is improved. At high field conditions, alumina/epoxy composites are more likely to accumulate homopolar charges than epoxy materials, the trap density of alumina material is smaller, resulting in a greater degree of charge accumulation and field strength distortion inside the sample under the same conditions.

epoxy resin composite  /  space charge  /  trap characteristics  /  insulation support
Peng WU, Jingxin WANG, Zhanfei LEI, Dingxin WEI, Lei SHI, Yousu QIN, Zongliang XIE, Peng LIU. Study on space charge characteristics of epoxy resin composite for insulation support[J]. Insulating Materials, 2023 , 56 (10) : 66 -74 . DOI: 10.16790/j.cnki.1009-9239.im.2023.10.009
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Year 2023 volume 56 Issue 10
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.10.009
  • Receive Date：2022-11-16
  • Online Date：2025-11-24
  • Published：2023-10-20
Article Data
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History
  • Received：2022-11-16
  • Revised：2023-01-05
Funding
Affiliations
    1Ultra High Voltage Company of State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
    2State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.10.009
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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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