Aging State Assessment of Cable Sheath Protector Based on High-order Harmonic Ratio of Leakage Current

FANG Chunhua; LI Fang; ZHANG Yilin; ZHUANG Li; HU Tao; SUN Aoqi; ZHANG Yao; LYU Junjie

doi:10.13296/j.1001-1609.hva.2024.12.017

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Aging State Assessment of Cable Sheath Protector Based on High-order Harmonic Ratio of Leakage Current

Research & Analysis | 更新时间：2025-04-26

- Aging State Assessment of Cable Sheath Protector Based on High-order Harmonic Ratio of Leakage Current
- High Voltage Apparatus Vol. 60, Issue 12, Pages: 152-159(2024)
- 作者机构：
  
  三峡大学电气与新能源学院，湖北　宜昌　 443002
- 作者简介：
- 基金信息：
  
  Open Fund of State Key Laboratory of Power Grid Environmental Protection(GYW51202201415)
- DOI：10.13296/j.1001-1609.hva.2024.12.017
  CLC：
- Received：20 July 2024，
  
  Revised：25 September 2024，
  
  Published：16 December 2024
- 稿件说明：
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FANG Chunhua, LI Fang, ZHANG Yilin, et al. Aging State Assessment of Cable Sheath Protector Based on High-order Harmonic Ratio of Leakage Current[J]. High voltage apparatus, 2024, 60(12): 152-159.
DOI：

FANG Chunhua, LI Fang, ZHANG Yilin, et al. Aging State Assessment of Cable Sheath Protector Based on High-order Harmonic Ratio of Leakage Current[J]. High voltage apparatus, 2024, 60(12): 152-159. DOI： 10.13296/j.1001-1609.hva.2024.12.017.

摘要

氧化锌电缆护层保护器是电力系统中保证电缆供电安全的重要设备，其运行状态将直接影响到线路安全。由于长期受到各种过电压的影响，电缆护层保护器极易发生老化，导致其性能发生明显劣化。基于泄漏电流分析的状态检测对于预测电缆护层保护器的老化状态具有重要作用。文中采用雷电冲击老化的方法，研究了电缆护层保护器冲击老化后的高频特性，提出了基于泄漏电流高次谐波比的老化状态诊断检测指标，该指标随老化程度的加深呈现逐渐增大的趋势。因此，能够用来有效评估电缆护层保护器的老化状态，为电缆护层保护器老化状态检测提供技术支撑。

Abstract

The zinc oxide cable sheath protector in power system is an important equipment to assure the safety of the cable supply and its operating condition will directly affect the safety of the line. Due to the long-term influence of various overvoltages

the cable sheath protector is susceptible to aging

resulting in significant deterioration of its performance. The leakage current analysis-based condition detection is important for predicting the aging state of the cable sheath protector. In this paper

the high frequency characteristics of the cable sheath protector after impact aging are studied by using the lightning impulse aging method

and a diagnostic test index for the aging state based on the high harmonic ratio of the leakage current is proposed

which tends to increase gradually with the increase of aging. Therefore

it can be used to effectively assess the aging state of the cable sheath protector and provide technical support for the detection of the aging state of the cable sheath protector.

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