高速铁路AT供电故障测距同相差流比算法研究与实践

Study and Practice on Same Phase Differential Current Ratio Algorithm for Fault Location of High-speed Railway under AT Power Supply Mode

高速铁路AT供电方式下发生故障时必须对故障点准确定位,这对故障测距算法的准确性提出较高要求。同相差流比算法可以准确计算出故障点位置,最大误差不超过50 m。本文对同相差流比算法进行理论研究,对算法中各种故障类型测距计算式进行理论推导,并基于故障实例对该算法的测距误差进行验证。

The fault point must be located accurately when the fault is occurred in a high-speed railway under AT power supply mode,it will put forward higher requirements for the algorithms of the fault location.The same phase difference current ratio algorithm can accurately calculate the location of the fault point,with a maximum error not more than 50 meters.The paper studies theoretically the same phase difference current ratio algorithm,deduces the calculation formulae for various fault types in the algorithm,and verifies the error of fault location of the algorithm based on fault examples.