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Electrical–Thermal Aging Performance of PAH-Modified Interfacial Coating Agent for HVDC Cable Accessory

Author

Listed:
  • Wenbo Zhu

    (Electric Power Research Institute, China Southern Power Grid Company, Guangzhou 510080, China
    These authors contributed equally to this work.)

  • Kaulya Pathiraja

    (Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
    These authors contributed equally to this work.)

  • Xu Guo

    (Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

  • Baojun Hui

    (Electric Power Research Institute, China Southern Power Grid Company, Guangzhou 510080, China)

  • Mingli Fu

    (Electric Power Research Institute, China Southern Power Grid Company, Guangzhou 510080, China)

  • Linjie Zhao

    (Electric Power Research Institute, China Southern Power Grid Company, Guangzhou 510080, China)

  • Yuhuai Wang

    (Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

  • Jin Li

    (Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

Abstract

A novel interfacial coating agent was developed by modifying silicone oil with polycyclic aromatic hydrocarbons (PAHs) to enhance the insulation performance of HVDC cable accessories. This study investigates the effects of corona and hot–cold cycle aging on the DC breakdown characteristics of the Cross-Linked Poly Ethylene and Ethylene Propylene Diene Monomer (XLPE/EPDM) interface. Interfacial breakdown tests, infrared spectroscopy, and a microstructural analysis were employed to investigate aging mechanisms. The results show that PAH-modified silicone oil significantly increases the breakdown voltage, with 2,4-dihydroxybenzophenone (C 13 H 10 O 3 ) identified as the optimal additive via quantum chemical calculations (QCCs). Even after aging, the modified interface maintains its superior performance, confirming the long-term reliability of the coating.

Suggested Citation

  • Wenbo Zhu & Kaulya Pathiraja & Xu Guo & Baojun Hui & Mingli Fu & Linjie Zhao & Yuhuai Wang & Jin Li, 2025. "Electrical–Thermal Aging Performance of PAH-Modified Interfacial Coating Agent for HVDC Cable Accessory," Energies, MDPI, vol. 18(14), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:14:p:3767-:d:1702932
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