一类电缆交叉互联接地系统缺陷的环流特征研究  

Study on Circulation Characteristics of a Kind of Defects inCable Cross-Connected Grounding 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》2023年第2期48-53,共6页Wire & Cable

摘　　要：在输电电缆运行维护过程中,交叉互联接地系统环流异常的缺陷时有发生,此类缺陷原因和位置的确定具有一定难度。针对同一交叉互联接地单元中同轴接地电缆内外芯与接地柱连接方向不一致的缺陷,对其等效电路进行相量分析和推导计算,归纳了21种常见情况的环流特征,为此类缺陷的带电诊断提供了缺陷数据库和科学思路。此外,以一起220 kV电缆线路交叉互联接地系统缺陷为例,将实测值与理论分析结果进行对比,验证了实测值符合理论推导出的环流特征,证明了环流特征研究结果的正确性。In the operation and maintenance of transmission cable,abnormal circulation sometimes occurs in a cross-connected grounding unit,and it is difficult to determine the cause and location of such defects.The defects which resulted from the inconsistent connection modes between the inner and outer core of the coaxial cable and the grounding columns in the same cross-connected grounding unit was introduced.Based on the schematic diagram and equivalent circuit diagram,phasor analysis,calculation and deduction were conducted,to sum up the circulation characteristics of 21 common kinds of defects,providing a defect library and scientific thought for energized diagnosis.In addition,taking a 220 kV cable line with a defect in cross-connected grounding system as an example,the measured data was compared with the theoretical analysis results,and it was found that the measured data was consistent with the theoretically derived circulation characteristics,which proved the correctness of the result of this work.

关 键 词：交叉互联 环流特征 带电诊断 

分 类 号：TM247[一般工业技术—材料科学与工程]