交叉互联电缆对故障工频电流的影响研究  

Study on the Influence of Cross-interconnection Cable on Fault Power Frequency Current

作　　者：王全恒 纪方玺 范志鹏 刘巧玉 王权 WANG Quanheng;JI Fangxi;FAN Zhipeng;LIU Qiaoyu;WANG Quan(Operation Branch of Qingdao Metro Group Co.,Ltd.,Qingdao 266000,China)

机构地区：[1]青岛地铁集团有限公司运营分公司,山东青岛266000

出　　处：《电工技术》2022年第7期81-84,共4页Electric Engineering

摘　　要：探讨了交叉互联方式下不同电缆段故障电缆末端接地方式对工频故障电流方向的影响,利用ATP仿真建模,研究了三芯电缆在不同交叉互联段时故障电流方向和大小,并将ATP仿真数据进行归纳得出了直接接地和经过渡阻抗接地时电缆的故障电流方向和大小判定规律。利用此类故障规律,可实现不同种类的电缆段的故障监测,从而合理配置电缆段故障监测装置,实现电缆关键部位的故障精确定位,减少不必要的因电缆故障造成的停电时间。The influence of the grounding method of the end of the faulty cable in different cable segments on the direction of the power frequency fault current under the cross-connection mode is discussed.Using ATP simulation modeling,the direction and magnitude of fault current in different cross-connection sections of three-core cables are studied.The ATP simulation data is summed up to obtain the judgment rule of the fault current direction and magnitude of the cable when it is directly grounded and grounded through a transition impedance.Using this kind of fault law,fault monitoring of different kinds of cable segments can be realized.In this way,the fault monitoring device of the cable section is reasonably configured to realize the precise location of faults in key parts of the cable and reduce unnecessary power outages caused by cable faults.

关 键 词：电力电缆故障 交叉互联 ATP仿真 故障判定 

分 类 号：TM247[一般工业技术—材料科学与工程]