Research on Plasma Repair of Insulation Surface Defects in EPDM Cable Accessories

ZHANG Wei; WU Qiang; GAO Chao; CHEN Jie; TAN Xiao; LI Chenying; CAO Jingxing

doi:10.13296/j.1001-1609.hva.2026.08.016

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Research on Plasma Repair of Insulation Surface Defects in EPDM Cable Accessories

Research & Analysis | 更新时间：2026-08-12

- Research on Plasma Repair of Insulation Surface Defects in EPDM Cable Accessories
- High Voltage Apparatus Vol. 62, Issue 8, Pages: 125-131(2026)
- 作者机构：
  
  国网江苏省电力有限公司电力科学研究院，南京 211103
  国网江苏省电力有限公司，南京 210024
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.08.016
  CLC：
- Received：16 February 2026，
  
  Revised：2026-04-24，
  
  Published：16 August 2026
- 稿件说明：
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ZHANG Wei, WU Qiang, GAO Chao, et al. Research on Plasma Repair of Insulation Surface Defects in EPDM Cable Accessories[J]. High Voltage Apparatus, 2026, 62(8): 125-131.
DOI：

ZHANG Wei, WU Qiang, GAO Chao, et al. Research on Plasma Repair of Insulation Surface Defects in EPDM Cable Accessories[J]. High Voltage Apparatus, 2026, 62(8): 125-131. DOI： 10.13296/j.1001-1609.hva.2026.08.016.

摘要

为提升电缆附件的运行性能和使用寿命，采用大气压等离子体技术对电缆附件绝缘表面裂纹缺陷进行修复研究。从三元乙丙橡胶绝缘电缆附件取样，在绝缘样品表面模拟裂纹缺陷，采用大气压等离子体射流沉积技术对绝缘表面缺陷开展修复实验，测量等离子体修复前后乙丙橡胶样品的表面化学成分、电阻率、沿面耐压和憎水性，分析不同处理条件对三元乙丙橡胶绝缘缺陷修复效果的影响。同时，对比分析了电晕老化对修复前后绝缘样品表面特性的影响。结果表明：采用六甲基二硅氧烷为前驱物，氩气作为载气时，等离子体修复在绝缘缺陷处沉积了含甲基的硅氧涂层，并有效提高了三元乙丙橡胶绝缘表面缺陷处的电阻率和沿面耐压，同时绝缘表面的憎水性获得提升，等离子体修复效果优于直接涂抹前驱物的修复效果；电晕老化使附件绝缘的电气性能下降，而经等离子体修复后的绝缘样品，其体绝缘性能和沿面绝缘性能在电晕老化后仍高于缺陷样品和完好样品。

Abstract

In order to enhance the operational performance and extend the service life of cable accessories

atmospheric pressure plasma technology is adopted to study the repair the surface crack defects on cable accessory insulation. Samples taken from the accessories of EPDM insulated cables

and the crack defects are simulated on the surface of the insulation samples. Atmospheric pressure plasma jet deposition technology is used to carry out repair experiments on the insulation surface defect. The surface chemical composition

resistivity

flashover voltage and hydrophobicity of EPDM samples are measured before and after plasma repair

and the effects of different treatment conditions on the repair effectiveness of EPDM insulation defects are analyzed. At the same time

the influence of corona aging on the surface characteristics of insulation samples before and after repair is compared and analyzed. The results show that

with hexamethyldisiloxane as the precursor and argon gas as the carrier gas

the plasma repair pricess deposits a methyl-bearing siloxane coating onto the insulation defects.This treatment effectively increases the resistivity and flashover voltage at the surface defect sites of EPDM insulation

and concurrently improves surface hydrophobicity. Corona aging leads to a deterioration in the electrical properties of the accessory insulation

while the body insulation performance and urface insulation performance of the plasma repaired samples are still superior to those of the defective and intact samples after corona aging.

关键词

Keywords

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