Insulation Condition Assessment of Vehicle High Voltage Cable Based on IRC Method and Partial Discharge Method

SONG Wei; JIA Buchao; ZHANG Peng; ZHANG Pengpeng; LI Feifei; XIN Dongli

doi:10.13296/j.1001-1609.hva.2024.01.014

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Insulation Condition Assessment of Vehicle High Voltage Cable Based on IRC Method and Partial Discharge Method

Research & Analysis | 更新时间：2025-04-26

- Insulation Condition Assessment of Vehicle High Voltage Cable Based on IRC Method and Partial Discharge Method
- High Voltage Apparatus Vol. 60, Issue 1, Pages: 118-127(2024)
- 作者机构：
  
  1.中国铁路济南局集团有限公司，济南　 250001
  2.中车青岛四方机车车辆股份有限公司，山东　青岛　 266111
  3.西南交通大学电气工程学院，成都　 610031
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(52007158)
- DOI：10.13296/j.1001-1609.hva.2024.01.014
  CLC：
- Received：01 September 2023，
  
  Revised：14 December 2023，
  
  Published：16 January 2024
- 稿件说明：
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SONG Wei, JIA Buchao, ZHANG Peng, et al. Insulation Condition Assessment of Vehicle High Voltage Cable Based on IRC Method and Partial Discharge Method[J]. High voltage apparatus, 2024, 60(1): 118-127.
DOI：

SONG Wei, JIA Buchao, ZHANG Peng, et al. Insulation Condition Assessment of Vehicle High Voltage Cable Based on IRC Method and Partial Discharge Method[J]. High voltage apparatus, 2024, 60(1): 118-127. DOI： 10.13296/j.1001-1609.hva.2024.01.014.

摘要

为准确评估乙丙橡胶（EPDM）车载电缆的绝缘老化状态，引用了等温松弛电流（IRC）法和局部放电（PD）法，分别讨论了老化因子、局部放电特征信息与电缆老化状态之间的映射关系，结果表明：随着车载电缆运行里程的增加，老化因子、局部放电量、放电次数和放电电流均呈现规律性增长趋势，多种老化应力协同作用是造成车载电缆绝缘劣化的主要原因，绝缘材料内部陷阱的增多和加深是车载电缆老化的微观表现。协同等温松弛电流法和局部放电法对车载电缆绝缘状态的评估具有有效性和可行性，通过建立微观陷阱分布特性与宏观局部放电特性之间的联系，分析可得：深陷阱捕获电荷的能力较强，电荷极易集聚，局部放电容易发生，因此基于IRC法和局部放电法对车载电缆绝缘状态进行评估具有一定的价值意义，可指导高速动车组电网规划及电缆检修工作。

Abstract

For accurately assessing the insulation aging condition of ethylene propylene rubber (EPDM) vehicle cable

the isothermal relaxation current (IRC) method and the partial discharge (PD) method are used

and the mapping relationship among the aging factor

the characteristic information of partial discharge and the aging condition of the cable is discussed respectively. The results show that with the increase of the operating mileage of the vehicle cable

the aging factor

the amount of partial discharge

the number of discharges and the discharge current show a regular growth trend. The synergistic effect of multiple aging stresses is the cause of the deterioration of the vehicle cable insulation. The increase and deepening of internal traps in insulating materials are the microscopic manifestations of the aging of vehicle cables. Both synergistic isothermal relaxation current (IRC) method and the partial discharge (PD) method have effectiveness and feasibility on the insulation condition of the vehicle cable. It is known by setting up the relation and analysis between micro trap distribution characteristic and macro partial discharge characteristic that the deep traps have a strong ability to capture charges. It is very easy to agglomerate and partial discharge is prone to occur. Therefore

the IRC method and the partial discharge method have a definite significanc

which can guide the grid planning and maintenance of cable of high-speed EMUs.

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