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The outer sheath of the cable is located at the outermost layer, which can effectively prevent the armor layer from being grounded, forming circulating currents, and being corroded. The aging performance of the outer sheath will further affect the armor layer and main insulation. Due to external factors such as immersion and temperature rise, the mechanical and electrical properties of the outer sheath may decrease and gradually form faults, seriously threatening the safe operation of the power system. This article is based on the orthogonal decomposition method, using temperature, immersion time, and pH value as variables to conduct experiments on polyethylene and polyvinyl chloride outer sheaths. The aging degree of the cable outer sheath is measured by parameters such as resistivity and elongation at break. The corresponding experimental results are used to explore the degree of influence of various external factors on the aging of the outer sheath, and corresponding measures to slow down aging are proposed based on the analysis results.

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Research on Aging of Cable Outer Sheath Based on Orthogonal Design

  • 会议论文

  • 发表日期：

    2026年

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  • Mu-song Lin,
  • Min-ying Wu,
  • Qiang Fu,
  • Zhong Zheng,
  • Yuan-zhao Han,
  • Meng Sun,
  • Kasimu Aihemaiti,
  • Meng-qi Ma,
  • Wen-hong Ruan

摘要

The outer sheath of the cable is located at the outermost layer, which can effectively prevent the armor layer from being grounded, forming circulating currents, and being corroded. The aging performance of the outer sheath will further affect the armor layer and main insulation. Due to external factors such as immersion and temperature rise, the mechanical and electrical properties of the outer sheath may decrease and gradually form faults, seriously threatening the safe operation of the power system. This article is based on the orthogonal decomposition method, using temperature, immersion time, and pH value as variables to conduct experiments on polyethylene and polyvinyl chloride outer sheaths. The aging degree of the cable outer sheath is measured by parameters such as resistivity and elongation at break. The corresponding experimental results are used to explore the degree of influence of various external factors on the aging of the outer sheath, and corresponding measures to slow down aging are proposed based on the analysis results.