摘要
高压电缆金属护套接地系统对电缆安全运行至关重要,同时故障占比较高。金属护套接地电流的监测结果能够反映电缆金属护套接地系统健康状态,是评价高压电缆线路运行状态的重要依据。解释了金属护套环流的形成机理,介绍了金属护套接地系统的常见缺陷,对国内外应用金属护套电流诊断金属护套接地系统缺陷的判据进行了全面梳理,并通过现场案例比较了现行判据的效果,为进一步提出更准确和全面的诊断判据提供参考。
The metal sheath grounding system of high⁃voltage cables is critical to the safe operation of cables and,at the same time,its fault rate is high.The monitoring results of metal sheath grounding current can reflect the health status of the cable metal sheath grounding system and is an important basis for assessing the operation status of high⁃voltage cable lines.In this paper the formation mechanism of the metal sheath current is explained.The common de⁃fects of the metal sheath grounding system is also described briefly.Finally,the criteria for diagnosing the defects of metal sheath grounding system by using metal sheath current both at home and abroad are comprehensively sorted out,and the effect of the existing criteria is compared through field cases to provide reference for proposing more ac⁃curate and comprehensive diagnostic criteria further.
作者
赵洋
马宪伟
程养春
黄子健
周戈
郭甜
ZHAO Yang;MA Xianwei;CHENG Yangchun;HUANG Zijian;ZHOU Ge;GUO Tian(State Grid Beijing Power Supply Company Cable Branch,Beijing 100031,China;North China Electric Power University,Beijing 102206,China)
出处
《高压电器》
北大核心
2026年第4期17-28,共12页
High Voltage Apparatus
基金
北京电力公司项目(520246220003)。
关键词
高压电缆
护套电流
故障诊断
综述
HV cables
sheath current
fault diagnosis
overview
