高压输电线路行波测距的行波波速确定方法

TRAVELLING WAVE VELOCITY MEASUREMENT IN FAULT LOCATION BASED ON TRAVELLING WAVE FOR HIGH VOLTAGE TRANSMISSION LINE

行波故障测距系统中的行波波速测量的准确性在一定程度上影响了行波测距的精度,文章在对影响行波波速测量准确性的因素、行波波速对测距精度的影响及现有行波波速测量方法进行分析的基础上,提出线路区外故障时利用双端行波测距系统本身测量行波波速,实现了行波波速的在线测量和调整。理论分析和实测数据均表明,该方法实现简单对提高行波故障测距精度有一定的效果。

In fault location system based on travelling wave, the measurement accuracy of travelling wave velocity influenced the fault location accuracy to a certain extent. On the basis of analyzing the factors influencing the measurement accuracy of travelling wave velocity, the influence of travelling wave velocity on fault location accuracy and existing travelling wave velocity measuring methods, the authors proposed that for the faults beyond the protection zone the two terminal travelling wave fault location system itself can be used to measure the travelling wave velocity, thus, the on-line measurement and adjustment of travelling wave velocity were implemented. Both theoretical analysis and measured data indicate that the proposed method is easy to implement and it is effective for the improvement of fault location accuracy based on travelling wave.