The influence of power factor and traction current on pantograph-catenary arc energy

摘要

Due to the increase of the train velocity, the pantograph-catenary arc occurs even more frequently, which results in severe erosion on the pantograph pan and the catenary wire. This leads to a serious threat to the normal operation of the pantograph-catenary system. As the level of the arc erosion has a close relationship with its energy, it is necessary to study the influencing factors and suppression means of the pantograph-catenary arc energy. In this paper, based on the actual working conditions of the simple catenary wire-supported overhead contact system, the calculations of the simulation parameters of the traction network and the load was carried out respectively. Based on the general modules provided by Sim Power System toolbox of MATLAB/SIMULINK, the model of the traction power supply system to produce arc is established. With the help of MATLAB/SIMULINK, it is also finished to calculate and analyze the change laws of the pantograph-catenary arc voltage and current under different influencing factors, mainly including the power factor and the traction current. It is found that the pantograph-catenary arc energy increases in index with the increase of the traction current, and the pantograph-catenary arc energy decreases with the increase of the power factor. At the same time, the pantograph-catenary arcing test system has been used to study the change laws of the pantograph-catenary arc voltage and current under different power factors and traction currents, which proved the simulation above to be effective and correct. This experiment also studied the influence of different traction currents and power factors on the average pantograph-catenary arc duration respectively. The results showed that the average pantograph-catenary arc duration has an approximate index relation with the traction current, and the arc duration of inductive load is longer than that of capacitive load apparently.