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Analysis on Voltage and Current Characteristics of Grounding System Defects in HV Cable Oil Filled Termination
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Chunhua FANG1, 2, Kaige GUO2, Jiayang LU2, Dongsan HU2, Jie CHEN3, Jingying CAO3
Insulating Materials | 2022, 55(2) : 104 - 110
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Insulating Materials | 2022, 55(2): 104-110
• Test and Analysis •
Analysis on Voltage and Current Characteristics of Grounding System Defects in HV Cable Oil Filled Termination
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Chunhua FANG1, 2, Kaige GUO2, Jiayang LU2, Dongsan HU2, Jie CHEN3, Jingying CAO3
Affiliations
  • 1Hubei Provincial Engineering Technology Research Center for Power Transmission Line, Yichang 443002, China
  • 2College of electricity and new energy, Three Gorges University, Yichang 443002, China
  • 3Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210008, China
Published: 2022-02-20 doi: 10.16790/j.cnki.1009-9239.im.2022.02.015
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In order to explore the influence of high voltage cable oil filled terminal grounding system defects such as lack of copper net and lead seal defects of on the voltage and current of oil filled terminal, we built an RLC equivalent model of oil filled terminal. On the basis of capacitance parameters and test parameters computed by COMSOL, the change of terminal voltage and current characteristic under the defects was analyzed, and then it was verified by actual fault cases. The results show that the loss of copper net leads to the grounding failure of the outer semi-conductive layer, and the voltage of the outer semi-conductive layer increases significantly, results in the discharge. The lead seal fracture leads to the unreliability of the connection between the aluminum sheath and the tail pipe, results in the voltage suspension of terminal aluminum sheath, and causes the discharge between the aluminum sheath and the buffer layer under long-term operation. Defects between the lead seals reduce the contact area between the aluminum sheath and the lead seal, the minimum allowable contact area at the lead seal is about 10%.

defects of terminal  /  equivalent circuits  /  aluminum sheath voltage  /  grounding current
Chunhua FANG, Kaige GUO, Jiayang LU, Dongsan HU, Jie CHEN, Jingying CAO. Analysis on Voltage and Current Characteristics of Grounding System Defects in HV Cable Oil Filled Termination[J]. Insulating Materials, 2022 , 55 (2) : 104 -110 . DOI: 10.16790/j.cnki.1009-9239.im.2022.02.015
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.02.015
  • Receive Date：2021-01-28
  • Online Date：2025-12-22
  • Published：2022-02-20
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History
  • Received：2021-01-28
  • Revised：2021-03-30
Funding
Affiliations
    1Hubei Provincial Engineering Technology Research Center for Power Transmission Line, Yichang 443002, China
    2College of electricity and new energy, Three Gorges University, Yichang 443002, China
    3Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210008, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.02.015
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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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