摘要
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 differ-ences 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.
出处
《浙江电力》
2014年第8期15-18,共4页
Zhejiang Electric Power
关键词
混合线路
故障测距
行波
查表法
hybrid lines
fault location
traveling wave
table look-up method
