Research on Crack Detection of High Voltage Cable Lead Sealing Based on Eddy Current Technology

CAO Junping; SUN Xingtao; WANG Shaohua; LYU Fuzai; TANG Zhifeng

doi:10.13296/j.1001-1609.hva.2020.08.026

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Research on Crack Detection of High Voltage Cable Lead Sealing Based on Eddy Current Technology

更新时间：2025-04-26

- Research on Crack Detection of High Voltage Cable Lead Sealing Based on Eddy Current Technology
- High VoltageApparatus Vol. 56, Issue 8, Pages: 168-175(2020)
- 作者机构：
  
  1. 国网浙江省电力公司电力科学研究院
  2. 浙江大学流体动力与机电系统国家重点实验室
  3. 浙江大学数字技术与仪器研究所
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.08.026
  CLC： TM75
- Published：2020
- 稿件说明：
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[1]曹俊平,孙兴涛,王少华,吕福在,唐志峰.基于涡流技术的高压电缆铅封裂纹缺陷检测研究[J].高压电器,2020,56(08):168-175.

CAO Junping, SUN Xingtao, WANG Shaohua, et al. Research on Crack Detection of High Voltage Cable Lead Sealing Based on Eddy Current Technology[J]. High voltageapparatus, 2020, 56(8): 168-175.
[1]曹俊平,孙兴涛,王少华,吕福在,唐志峰.基于涡流技术的高压电缆铅封裂纹缺陷检测研究[J].高压电器,2020,56(08):168-175. DOI： 10.13296/j.1001-1609.hva.2020.08.026.

CAO Junping, SUN Xingtao, WANG Shaohua, et al. Research on Crack Detection of High Voltage Cable Lead Sealing Based on Eddy Current Technology[J]. High voltageapparatus, 2020, 56(8): 168-175. DOI： 10.13296/j.1001-1609.hva.2020.08.026.

摘要

铅封作为最普遍的高压电缆金属铅护套或铝护套的中间连接方式

有着极重要的密封防水作用。为了确保高压电缆安全稳定运行并提升电缆服役寿命

需要对电缆接头的铅封状态进行定期检查

降低铅封开裂带来的安全隐患。文中首先分析了高压电缆铅封开裂的原因

并对比了针对其裂纹缺陷常用的检测方法

提出了利用涡流检测技术对高压电缆铅封裂纹缺陷进行检测的方法。文中分析了涡流检测技术的原理及信号处理方法

并通过COMSOL有限元软件仿真、模拟实验和现场检测验证了采用涡流技术对高压电缆铅封开裂进行检测的可能性。研究结果表明

涡流探伤技术可有效检测出高压电缆铅封是否开裂

且铅封开裂越严重

探头线圈阻抗幅值和相位的变化越明显。

Abstract

Lead seal is the connection between lead sheaths or aluminum sheaths of high voltage cable

and it has waterproof function. For regular inspection of the lead seal to prevent cracking hazard

the causes of lead seal cracking of high voltage cable are analyzed

and the common crack detection methods are compared. A crack defect detection method of lead seal of high voltage cable is proposed by means of the eddy current detection technology. The principle and signal processing method of the eddy current detection technology are analyzed

and the feasibility of applying the eddy current detection technology to high-voltage cable lead seal cracking detection is verified by COMSOL finite element software simulation

simulation experiment and field test. The results show that the eddy current detection technology can effectively detect whether a crack exists in the lead seal or not

and the larger the crack size is

the more obvious the changes of probe coil’s impedance amplitude and phase become.

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