电缆交叉互联接地系统缺陷带电诊断分析  

Analysis of Energized Diagnosis of Defects in Cable Cross Connection System

作　　者：姚舜禹 YAO Shunyu(State Grid Zhengzhou Power Supply Company,Zhengzhou 450000,China)

机构地区：[1]国网郑州供电公司,郑州450000

出　　处：《电线电缆》2022年第2期37-42,46,共7页Wire & Cable

摘　　要：通过接地环流检测能有效地发现交叉互联接地系统缺陷,但诊断缺陷原因和缺陷位置有一定难度,传统的诊断方法会消耗大量的人力和时间。以一起220 kV某电缆线路的交叉互联接地系统缺陷为例,在不停电且不打开接地箱的条件下,通过检测绝缘接头两个接地柱的电流,再经过分析和理论计算,诊断出是8;中间接头交叉互联箱处A相同轴电缆内外芯与铜壳接地柱接反导致了缺陷,之后快速停电消缺,消缺后环流恢复正常。通过带电检测和分析计算,能够快速定位缺陷,并推断出缺陷产生的原因快速消缺,实现计划检修向状态检修的转变。By detecting earth current, the defects of the cross-bonding grounding system can be found effectively. However, it is difficult to figure out the cause and locate the defects by traditional means, which needs lots of manpower and time. Taking a 220 kV cable line as an example, an energized method was presented to deal with such defects, without opening the grounding boxes. By analysing and calculating the data of current measured separately at the two grounding columns on the copper shell of the insulation joint, the cause and location of the defect were figured out.Defect-elimination was fulfilled quickly, and then the earth current returned to normal. In conclusion, energized test, followed by analysis and calculation can diagnose the defects efficiently, to shorten the schedule outage duration. This method means a change from schedule overhaul to condition maintenance.

关 键 词：交叉互联 接地环流检测 感应电压 接地柱 状态检修 

分 类 号：TM247[一般工业技术—材料科学与工程]