摘要
为了在高压单芯电缆线路上实现有效的短路故障定位,提出一种基于护层电流时域反演信号的故障定位方法。根据短路故障点能量最大的原理,该方法在高压电缆的金属护层接地处提取护层电流,并通过故障信号的传递函数计算出各猜测故障点位置的能量,能量最大点即故障点位置。仿真分析典型高压电缆线路结构,结果表明,该方法能够有效地定位故障点位置,定位精度随采样频率的增加而增加,建议实际应用时的采样频率在10MHz以上。
In order to effectively locate short-circuit faults in the high-voltage single-core cable,this paper presents a new method based on the electromagnetic time-reversal(EMTR)theory.As the fault location is the maximum energy point,this method monitors the sheath current at the grounding position of the high-voltage terminal and calculates the energy of each guessing fault location by the transfer function of the fault signal.A typical high-voltage cable structure is simulated and analyzed.The results show that the method can effectively locate the fault point,and the accuracy can be improved with the increase of the sampling rate.It is recommended of the above 10MHz sampling rate in practical applications.
作者
柴鹏
周灏
张煜
史筱川
李爽
杨潇
周苗
CHAI Peng;ZHOU Hao;ZHANG Yu;SHI Xiaochuan;LI Shuang;YANG Xiao;ZHOU Miao(Huangshi Power Supply Branch,State Grid Hubei Electric Power Co.,Ltd.,Huangshi 435000,China;Wuhan Intelligent Monitoring Technology Co.,Ltd.,Wuhan 430000,China)
出处
《电力科学与技术学报》
CAS
北大核心
2021年第6期189-195,共7页
Journal of Electric Power Science And Technology
基金
国网湖北省电力有限公司科技项目(SGHBHS00YJJS1800964)。
