基于转移阻抗法的带保护线的AT供电测距原理

Impedance Transfer Based Fault Location of AT Feeding Systems with Protection Wire

带保护线的AT供电方式较其他供电方式在结构上更为复杂,故障率也比其他供电方式更高。因此能够快速确定故障地点并及时处理故障显得尤为重要。本文首次提出了应用转移阻抗法对带保护线的AT供电方式故障测距,通过保护线和钢轨的等值计算,找到带保护线的AT供电方式故障测距公式中的阻抗计算方法,解决了目前没有带保护线等值电路情况下的阻抗计算问题,最后运用Matlab/Simulink仿真验证了本文提出的转移阻抗法的阻抗计算可以应用于带保护线的AT供电方式故障测距。

AT power supply system with protection wire is more complex than other power supply systems in framework, so it has more faults than others. For the requirement of the HSR, the fault point should be found out quickly and accurately to repair the power supply systems. This paper put up a method to find the fault location by transfer impedance in AT power supply system with protection wire for the first time. And find a method to calculate the impedance in the fault location expression of AT power system with protection wire. Also works out the problem of calculating impedance without the equivalent circuit. Finally, proved the method of calculating the transfer impedance can be applied to fault location of the AT power system with protection wire by simulation with Matlab/Simulink.