EN220 kV高压电缆交叉互联接地回路电阻异常的定位检测
Localization and Detection of Abnormal Resistance in Cross-Interconnection Grounding Circuit of 220 kV High Voltage Cable
- 电线电缆 2025年68卷第11期 页码：55-60
- 作者机构：
国网南通供电公司，南通 226000
- 作者简介：
[ "", "1992—，男，工程师主要从事输电电缆运维和检修工作E-mail：2218173428@qq.com" ]
- 基金信息：
DOI：10.16105/j.dxdl.1672-6901.20252028
中图分类号： [TM757.2收稿：2025-01-24，
修回：2025-04-26，
录用：2025-05-12，
纸质出版：2025-11-25
- 稿件说明：
移动端阅览
葛良军, 孙杰. 220 kV高压电缆交叉互联接地回路电阻异常的定位检测[J]. 电线电缆, 2025, 68(11): 55-60
GE L J, SUN J. Localization and detection of abnormal resistance in cross-interconnection grounding circuit of 220 kV high voltage cable[J]. Wire & Cable, 2025, 68(11): 55-60
葛良军, 孙杰. 220 kV高压电缆交叉互联接地回路电阻异常的定位检测[J]. 电线电缆, 2025, 68(11): 55-60 DOI： 10.16105/j.dxdl.1672-6901.20252028.
GE L J, SUN J. Localization and detection of abnormal resistance in cross-interconnection grounding circuit of 220 kV high voltage cable[J]. Wire & Cable, 2025, 68(11): 55-60 DOI： 10.16105/j.dxdl.1672-6901.20252028.
摘要
近年来，接地系统缺陷已成为高压电缆故障跳闸主要原因之一，尤其是电缆终端或接头部位封铅腐蚀、开裂、脱落等造成电缆金属护套接地不良缺陷。通过介绍一起采用交叉互联接地方式的220 kV高压电缆接地回路电阻检测数值异常案例，详细阐述高压电缆等效电路模型，从故障机理角度深入分析接地不良缺陷对电缆安全运行影响和消缺紧急程度；介绍交叉互联接地系统回路电阻检测基本原理，针对该检测方法缺陷定位能力不足问题，提出应用分流检测法和“开窗”检测法相结合开展缺陷测寻定位，最终锁定缺陷位于15#塔电缆终端尾管封铅位置，支撑运维人员针对性开展检修消缺。最后，针对电缆接地回路电阻缺陷和封铅工艺质量管控，提出相关防范措施和建议。
Abstract
In recent years
grounding system defects have become one of the main causes of high voltage cable fault trips
especially the corrosion
cracking
and falling off of lead sealing at cable terminals or joints
which cause poor grounding defects of the cable metal sheath. By introducing an abnormal defect in the grounding circuit resistance detection value of a 220 kV high voltage cable using cross-interconnection grounding method
the equivalent circuit model of high voltage cables was elaborated in detail. Starting from the fault mechanism
impact of poor grounding defects on the safe operation of cables and the urgency of defect elimination was deeply analyzed. The basic principle of grounding circuit resistance detection of cross-interconnection system was introduced in detail. In response to the insufficient defect positioning ability of this detection method
it was proposed to combine shunt detection method and “window opening” detection method to carry out defect search and positioning. The defect was finally located at the lead sealing position of cable terminal tail pipe of Tower No. 15
which supported the operation and maintenance personnel to carry out targeted maintenance and defect elimination. Finally
in view of the resistance defects of cable grounding circuit resistance and the quality control of lead sealing process
relevant preventive measures and suggestions were put forward.
关键词
Keywords
references
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