基于傅立叶-阻抗轨迹圆算法的电力电缆故障选线  

Fault Line Selection of Power Cable Based on Fourier Impedance Locus Circle Algorithm

作　　者：姬和静 JI He-jing(Weinan Power Supply Branch of Shaanxi Local Power(Group)Co.,Ltd.,Weinan 714000,China)

机构地区：[1]陕西地方电力(集团)有限公司渭南供电分公司,陕西渭南714000

出　　处：《通信电源技术》2020年第7期161-163,共3页Telecom Power Technology

摘　　要：本文提出一种基于傅立叶-阻抗轨迹圆算法的电力电缆故障选线方法。首先,应用傅立叶算法获得基频附近的三相电压和三相电流。其次,利用相序滤波算子,计算正序和零序分量;同时,利用线路参数计算其阻抗轨迹圆。然后,计算被测线路的测量阻抗,并与线路的阻抗轨迹圆进行比较,检测线路是否出现接地故障。最后,对不同接地故障进行选线实验,结果表明本文提出的算法能够快速完成电缆故障选线。This paper presents a fault line selection method for power cable based on Fourier impedance locus circle algorithm.Firstly,the three-phase voltage and current near the fundamental frequency are obtained by Fourier algorithm.Secondly,the phase sequence filter operator is used to calculate the positive sequence and zero sequence components,and the circuit parameters are used to calculate the impedance trace circle.Then,the measured impedance of the tested line is calculated and compared with the impedance trace circle of the line to detect whether the line has ground fault.Finally,the experiments of different ground faults are carried out,and the results show that the algorithm proposed in this paper can complete the fault line selection quickly.

关 键 词：距离保护 傅立叶算法 阻抗轨迹圆 

分 类 号：TM75[电气工程—电力系统及自动化]