不同牵引策略下地铁杂散电流动态分布研究

基于3种经典牵引策略思想,建立了不同牵引策略下的列车牵引模型。将回流系统等效为4层结构的平面分布参数电阻网络,建立了地铁杂散电流分布模型。通过牵引供电等效计算,将不同牵引策略下的列车牵引模型与杂散电流分布模型相结合,构建了动态边界条件,得到了不同牵引策略下的杂散电流动态分布模型。在所建立的杂散电流动态分布模型的基础上,提出一种杂散电流泄漏总量的计算方法。利用MATLAB软件,对不同牵引策略下的杂散电流动态分布模型进行仿真研究,可为杂散电流的腐蚀防护提供一定的理论参考。

Dynamic Distribution of Metro Stray Current under Different Traction Strategies

According to 3 classical traction strategies,corresponding train traction models are introduced.In this paper,a stray current distribution model is established,in which the reflow system is equivalent to plane distributed parameter resistor network in a four-layer structure.Through equivalent calculation of the traction power supply,the train traction models under different traction strategies are integrated with the stray current distribution models to build dynamic boundary conditions,thus the stray current dynamic distribution models under different traction strategies are obtained.Meanwhile,based on the distribution models,a method to calculate the total amount of stray current leakage is proposed.Then,MATLAB software is used to simulate the stray current dynamic distribution models under different traction strategies,the result could provide a theoretical reference for the stray current corrosion protection.