【摘要】 输电线路发生故障后,行波从故障点出发向不同方向行进,基于单端行波测距原理,故障点反射波以及其他折射反射行波到达检测母线的各个行波波头极性组合,反映了线路的不同故障区段,可以直接判断出故障点所属区段。文中对随机故障发生的4个区段,利用各类行波到达检测母线的时间,分别推导了不受行波速度影响的故障测距算法。现场应用验证了该算法的有效性。更多还原

【Abstract】 When faults occur in a transmission line,traveling waves generated from the short circuit should travel to bus-bars on both sides.Based on the single-ended traveling wave fault location principle,the wave polarity combining the first and subsequent arrival instants of the traveling waves can be measured at the detecting bus-bar terminal to enable direct determination of the fault sections.A fault location method for power transmission systems depending on the arriving time of the traveling waves is presented.A novel algorithm free from the influence of the speed of traveling waves is derived respectively,the availability of which is shown by examples.更多还原