摘要
随着电网的高速发展,高压电缆在输配电网中被大量用于地下电力电缆线路。高压电缆金属护套接地系统一旦出现异常和故障,将会导致电缆接地系统悬浮电压和环流异常,长时间运行将会导致电缆绝缘损坏,影响高压电缆的安全稳定运行。因此,对运行高压电缆接地系统回路电阻定期开展带电检测,可以及时发现和排查电缆接地系统的异常和缺陷。结合工程实际情况通过对运行高压电缆接地系统直流电阻测试数据变化的影响因素进行分析,提出改进措施来减小测量偏差,并通过实际测试验证改进措施的有效性,供工程实践参考。
With the rapid development of power grids,high-voltage cables are widely used in underground power cable lines in transmission and distribution grids.Once the high-voltage cable metal sheath grounding system encounters anomalies and failures,it will cause abnormal floating voltage and circulation in the cable grounding system,which will lead to damage to the cable insulation and affect the safe and stable operation of the high-voltage cable for a long time.Therefore,conducting regular live detection on the loop resistance of the operating high-voltage cable grounding system can detect and troubleshoot anomalies and defects in the cable grounding system in a timely manner.By analyzing the influencing factors of the changes in the DC resistance test data of the operating high-voltage cable grounding system,this paper proposes improvement measures to reduce measurement deviations and ensure the accuracy of the test data for engineering practice reference.
作者
屠晔炜
孔德印
汪春萌
刘超
殷哲轩
TU Ye-wei;KONG De-yin;WANG Chun-meng;LIU Chao;YIN Zhe-xuan(Jiaxing Power Supply Company of State Grid Zhejiang Electric Power Co.Ltd.,Jiaxing 314000,China;Jiaxing Hengguang Electric Power Construction Co.Ltd.,Jiaxing 314000,China)
出处
《电气开关》
2025年第4期81-85,共5页
Electric Switchgear
关键词
高压电缆
接地系统
直流电阻
带电检测
high-voltage cable
grounding system
DC resistance
live detection
作者简介
屠晔炜(1977-),男,浙江嘉兴人,高级技师,主要从事电网运检工作。
