一种三芯电缆状态在线监测与短路故障定位方法的研究  

Method for On-line Monitoring and Short-circuit Fault Location of Three-core Cables

作　　者：佘建宁 江波 唐玲 马朝瑜 陆冲 曾翔君[4] 胡红利[4] SHE Jianning;JIANG Bo;TANG Ling;MA Zhaoyu;LU Chong;ZENG Xiangjun;HU Hongli(State Grid Tongchuan Power Supply Company,Tongchuan 7270312,China;Hubei Longyuan New Energy Co.,Ltd.,Wuhan 430066,China;Shaanxi Xixian New Area Fengxi New City Development and Construction Group Co.,Ltd.,Xi’an 710032,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网铜川供电公司,陕西铜川7270312 [2]湖北龙源新能源有限公司,湖北武汉430066 [3]陕西省西咸新区沣西新城开发建设集团有限公司,陕西西安710032 [4]西安交通大学电气工程学院,陕西西安710049

出　　处：《智慧电力》2023年第11期91-97,105,共8页Smart Power

基　　金：国家自然科学基金资助项目(52177009)。

摘　　要：针对10 kV中压配电网故障定位不够精确问题,提出一种三芯电缆状态在线监测与短路故障定位方法。首先,研究三芯电缆周围泄漏磁场的分布规律,得出三芯电缆运行状态与泄漏磁场的关联关系;其次,分析三芯电缆故障判断与电流监测原理,提出一套三芯电缆状态在线监测系统的结构设计;再次,通过仿真分析与实验,得到三芯电缆故障运行参数;最后,给出三芯电缆状态在线监测与短路故障定位方法,并以10 kV中压电缆为例进行实验,验证了此方法的有效性。Targeting the problem of inaccurate fault positioning of 10 kV medium voltage distribution network,the paper proposes a online condition monitoring and short-circuit fault location method for three-core cable.Firstly,the distribution of leakage magnetic field around the three-core cable is studied,and the relation between the operation state of the three-core cable and leakage magnetic field is obtained.Then the principle of fault judgment and current monitoring of the three-core cable is analyzed,and the structure design of the three-core cable online condition monitoring system is proposed.Through simulation analysis and laboratory experiment,the fault operation parameters of the three-core cable are obtained.Finally,the on-line monitoring and short-circuit fault location method for the three-core cable is given,and the effectiveness of this method is verified by experiments on a 10 kV medium voltage cable.

关 键 词：三芯电缆 泄漏磁场 状态监测 故障定位 

分 类 号：TM930[电气工程—电力电子与电力传动]