基于查表法的架空线电缆混合线路行波故障测距方法A Traveling Wave Fault Location Method for Hybrid Transmission Lines Consisting of Power Cables and Overhead Lines Based on Table Look-up Method
宣耀伟,余为,俞恩科,李世强,敬强,李乐
Xuan Yaowei,Yu wei,YU Enke,LI Shiqiang,JING Qiang,LI Le
摘要(Abstract)：
针对架空线-电缆混合线路,提出了基于查表法的故障测距算法。将故障距离与混合线路两端测量点接收到故障初始行波的时间差按一一对应的关系制成表格,表格中数据的采样步长根据现场设备的采样频率确定。当线路发生故障时,测量故障初始行波从故障点传播到线路两侧测量点的时间差,然后搜索已制定好的表格来确定故障点位置。ATP仿真结果表明,查表法的测距精度较高,适用于现场设备运行,提高了运算速度,具备较高的实用价值。
Aiming at the hybrid transmission lines consisting of overhead lines and power cables, this paper proposes a fault location algorithm based on table look-up method. Fault distance and the arrival time differences of initial fault traveling wave at two measurement points in hybrid lines are tabulated in accordance to the one-to-one correspondence. The sampled step length of the data in the table is determined by the sampled frequency of the field devices. When the transmission line breaks down, arrival time difference of the initial traveling wave traveling from the fault point to measurement points at both sides of the line is measured and then fault location can be determined by searching the table. The ATP simulation results show that the table look-up method is of high precision and it is suitable for field operation; it improves calculation speed and is of high practicability.
关键词(KeyWords)：
混合线路;故障测距;行波;查表法
hybrid lines;fault location;traveling wave;table look-up method
基金项目(Foundation):
作者(Author):
宣耀伟,余为,俞恩科,李世强,敬强,李乐
Xuan Yaowei,Yu wei,YU Enke,LI Shiqiang,JING Qiang,LI Le
DOI: 10.19585/j.zjdl.2014.08.004
参考文献(References)：
- [1]徐丙垠,李京,陈平,等.现代行波测距技术及其应用[J].电力系统自动化,2001,25(23):62-65.
- [2]陈平,葛耀中,索南加乐,等.基于故障开断暂态行波信息的输电线路故障测距研究[J].中国电机工程学报,2000,20(8):56-64.
- [3]曾祥君,尹项根,林福昌,等.基于行波传感器的输电线路定位方法研究[J].中国电机工程学报,2002,22(6):42-46.
- [4]郑健超,陈祥训,覃剑,等.验证小波变换行波故障测距法的现场试验[J].电网技术,2001,25(3):26-29.
- [5]黄子俊,陈允平.基于小波变换的行波故障定位法在串补输电线路中的应用[J].电网技术,2004,28(18):5-9.
- [6]吴承恩,邰能灵,郁惟铺,等.超高压电缆-架空线混合线路故障测寻方法[J].电力系统自动化,2005,29(10):26-30.
- [7]HUANG YIZHUANG,LI QUANXIAO,XIA MINGCHAO.A new fault location method[C].International Conference on Power System Technology,Singapore,2002.
- [8]徐善琛,张建文,王刚,等.基于波速度归一方法的电缆架空线路双端行波测距研究[C].第十八届全国煤矿自动化学术年会中国煤炭学会自动化专业委员学术会议论文集,2008.
- [9]黄震,江泰廷,张维锡,等.基于双端行波原理的高压架空线-电缆混合线路故障定位方法[J].电力系统自动化,2010,34(14):88-91.
- [10]王奎鑫,陈平,唐毅,等.基于组合行波原理的高压架空线-电缆混合线路故障测距方法[J].电力系统保护与控制,2012,40(10):90-94.
- [11]覃剑,葛维春,邱金辉,等.输电线路单端行波测距法和双端行波测距法的对比[J].电力系统自动化,2006,30(6):92-95.