基于行波的电力电缆故障测距组合方法研究

Research on Combined Method of Power Cable Fault Location Based on Travelling Wave

分析了现有行波故障测距方法所存在的问题,在单端行波测距法的基础上推导出一种与行波波速无关的测距方法,然后将此方法与传统双端行波测距方法相结合形成一种组合测距方法。这种方法在测量端的近端线路故障时采用传统双端测距方法,解决了近端测距的盲区问题;在非近端故障时采用波速无关的测距方法,提高了测距精度。

The existing problems of the current fault location methods based on travelling wave are analyzed,and a location method is derived which is unrelated to wave velocity.Then a combined location method is formed which combines the above-mentioned location method with the traditional two-terminal location method.The traditional two-terminal location method is used to solve the blind zone problem of near-end fault location,and the location method which is unrelated to wave velocity is used to improve the location precision of the far-end fault.