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Numerical algorithm and characteristic analysis on current-carrying capacity of HVDC XLPE insulated cable
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Peng ZHAO1, Jianxin GUAN1, Benhong OUYANG1, Kaiwen HUANG1, Jiankang ZHAO1, Youxiang YAN2
Insulating Materials | 2023, 56(1) : 90 - 95
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Insulating Materials | 2023, 56(1): 90-95
• Test and Analysis •
Numerical algorithm and characteristic analysis on current-carrying capacity of HVDC XLPE insulated cable
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Peng ZHAO1, Jianxin GUAN1, Benhong OUYANG1, Kaiwen HUANG1, Jiankang ZHAO1, Youxiang YAN2
Affiliations
  • 1State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan 430074, China
  • 2Xiamen Power Supply Company, State Grid Fujian Electric Power Company, Xiamen 361006, China
Published: 2023-01-20 doi: 10.16790/j.cnki.1009-9239.im.2023.01.014
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Current-carrying capacity is an important indicator of cable transmission capacity, which directly affects the operation reliability and economy of HVDC cables. According to the electric field distribution characteristics in the insulation layer of DC cable, an analytical calculation method of the electric field distribution inside and outside the insulation layer based on the equivalent conductivity was proposed. Taking a ±535 kV XLPE insulated DC cable as example, considering the highest operating temperature of cable conductor and the maximum allowable temperature difference of insulation layer, we obtained the load control domains of the HVDC cable under different operating conditions. The results show that the current-carrying capacity and application characteristics of HVDC cables can be analyzed by the electric thermal field decoupling method effectively, and the maximum temperature difference of insulation layer is the core factor limiting the current-carrying capacity of DC cable below critical ambient temperature. Under the critical ambient temperature, raising the highest operating temperature of conductor has limited influence on the current-carrying capacity, while optimizing the electrical resistance of insulating materials and cable structure is the key to improving the current-carrying capacity.

HVDC cable  /  current carrying capacity  /  equivalent conductivity  /  critical ambient temperature  /  load control region
Peng ZHAO, Jianxin GUAN, Benhong OUYANG, Kaiwen HUANG, Jiankang ZHAO, Youxiang YAN. Numerical algorithm and characteristic analysis on current-carrying capacity of HVDC XLPE insulated cable[J]. Insulating Materials, 2023 , 56 (1) : 90 -95 . DOI: 10.16790/j.cnki.1009-9239.im.2023.01.014
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.01.014
  • Receive Date：2022-01-23
  • Online Date：2025-11-21
  • Published：2023-01-20
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  • Received：2022-01-23
  • Revised：2022-03-10
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Affiliations
    1State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan 430074, China
    2Xiamen Power Supply Company, State Grid Fujian Electric Power Company, Xiamen 361006, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.01.014
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