Division strategy study for gas insulation surface discharge stage based on multi-physical information

LI Yujie; Lu Yongling; Wang Zhen; Li Hongtao; Xiao Hanyan; Zhuang Tianxin

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Division strategy study for gas insulation surface discharge stage based on multi-physical information

更新时间：2025-06-09

- Division strategy study for gas insulation surface discharge stage based on multi-physical information
- Moren Journal (2025)
- 作者机构：
  
  国网江苏省电力有限公司电力科学研究院,江苏省南京市211103
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 July 2024，
  
  Revised：18 July 2024，
  
  Accepted：26 July 2024，
- 稿件说明：
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LI Yujie, Lu Yongling, Wang Zhen, et al. Division strategy study for gas insulation surface discharge stage based on multi-physical information[J/OL]. Moren journal, 2025.
DOI：

LI Yujie, Lu Yongling, Wang Zhen, et al. Division strategy study for gas insulation surface discharge stage based on multi-physical information[J/OL]. Moren journal, 2025. DOI：

摘要

气体绝缘金属封闭设备（GIS设备）内部绝缘缺陷导致的局部放电会影响设备的绝缘性能，其中沿面放电是引发GIS设备闪络故障的主要原因。为有效实现局放异常严重程度判定，指导现场GIS局放异常处置，本文提出了基于多物理量的GIS绝缘件沿面放电精细化放电阶段划分策略。首先建立了气体绝缘多物理信号检测试验平台，应用光学传感器、特高频（UHF）传感器和超声波（AE）传感器测量绝缘件不同阶段沿面放电电气量，并与脉冲电流法局放进行数据对照，依照GIS设备绝缘件实际沿面放电可能因素设计沿面放电缺陷模型，并根据多物理信息推导出放电过程中产生的相对光辐射功率、相对电磁辐射功率和相对超声辐射功率。针对不同能量随外加电压增加而变化的情况，对检测到的三种局放能量之间的关系进行了研究，提出了沿面放电多物理能量比的方法评估放电的严重程度，并绘制基于三角坐标系的沿面放电局放严重程度发展路径，并使用该方法对现场检测到沿面放电局放异常信号进行严重程度评估。

Abstract

The internal insulation defects in gas insulated equipment leading to partial discharges will affect the insulation performance of the equipment. Among them

surface discharges are a typical type of partial discharge

which often occurs at basin-type insulators. To realize effective discharge detection and discharge degree determination

a refined discharge stage division strategy for gas-insulated creeping discharge based on multi-physical information is investigated in this study. First

an experimental platform for gas-insulated multi-physical signal detection is established

of which high frequency current transformer (HFCT)

optical sensor

ultra-high frequency (UHF) and acoustic emission (AE) sensors are applied to measurement the multi-physical energy releases in the process of creeping discharge. Then an artificial surface discharge defect is developed following the actual surface discharge of basin insulator. Subsequently

the relative optical radiation power

electromagnetic radiation power and ultrasonic radiation power produced in the process of discharge are deduced from the multi-physical information. Meanwhile

the relationships among the three energy releases are carried out for variation of different energy with the applied voltage increases. Finally

development path of multi-physical energy ratio for surface discharge is proposed to evaluate the severity of discharge.

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references

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