不同牵引策略下地铁杂散电流动态分布研究

Dynamic Distribution of Metro Stray Current under Different Traction Strategies

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。

According to 3 classical traction strategies,corre- sponding train traction models are introduced. In this paper, a stray current distribution model is established,in which the re- flow system is equivalent to plane distributed parameter resis- tor network in a four-layer structure. Through equivalent cal- culation 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 condi- tions, 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 mod- els under different traction strategies, the result could provide a theoretical reference for the stray current corrosion protection.