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牵引供电系统是电气化铁路的基础,牵引供电系统由于受到机车运行的工况变化的影响,以及一些不确定的因素,容易出现接地故障,又由于牵引供电系统不同于高压输电线路,所以牵引网的故障测距有着自身的特点。根据AT牵引网的实际电路在PSCAD中构造带机车负荷的仿真模型,对机车在牵引网上运行时的电压电流变化进行模拟,得出牵引网在发生短路情况下的故障数据,再利用MATLAB对仿真得到的数据进行阻抗法和行波法测距,比较两者的优缺点,最终提出将二者结合实现信息融合测距。
Traction power supply system is the basis of electrified railway. Traction power supply system is prone to ground fault due to the change of working conditions of locomotive running, as well as some uncertainties. Because traction power supply system is different from high-voltage power transmission lines, Fault location has its own characteristics. According to the actual circuit of AT traction network, a simulation model with locomotive load is constructed in PSCAD to simulate the voltage and current changes of locomotive when it runs on traction network. The fault data of traction network in the case of short circuit are obtained. The data obtained by the impedance method and traveling wave method to measure the distance, compare the advantages and disadvantages of the two, and ultimately proposed the combination of the two to achieve information fusion ranging.