现代行波故障测距原理及其在实测故障分析中的应用—A型原理

长期以来,对输电线路暂态行波现象的研究只停留在理论分析和EMTP仿真方面,而线路上的实际暂态行波波形要比通过仿真获得的暂态行波波形复杂得多,这使得迄今为止所提出的各种单端行波测距算法难以发挥作用。为了将利用故障暂态行波的A型单端现代行波故障测距原理更好地用于实测波形分析,将其划分为3种独立的运行模式,即标准模式、扩展模式和综合模式,并给出了各自用于实测电流暂态波形分析的典型实例。实测故障分析表明,A型现代行波故障测距原理具有很高的准确性,其绝对测距误差不超过500m。

Modern travelling wave based fault location principle and its applications to actual fault analysis-Type A principle

For a long time, studies of transient travelling transmission lines only concentrate on theory analysis and EMTP simulations,but actual transient waveforms of travelling waves are much more complicated,which makes it unapplicable to act fault analysis of all sorts of single-ended travelling wave-based location algorithms till now. In order to make the Type A single ended modern travelling wave based fault location principle for transmission lines using fault induced transient travelling waves to be better used in actual waveform based transient analysis, it is classified into three independent modes of operation,namely standard mode, extended mode and consolidated mode, and the corresponding demonstrations of actual current transient waveform analysis are given. The actual fault analysis shows that the Type A principle possesses very high accuracy, and its absolute location error does not exceed 500 m.