【摘要】 弄清电气化铁道牵引电流沿钢轨的分布规律与特征，是进一步研究电化牵引对沿线通信信号等设备干扰的基础，同时也为现场铁路沿线扼流变压器容量配置提供参考数据。本文分析了我国现有的直供，ＡＴ，ＢＴ供电方式下沿线轨流分布的数学模型，通过不同的边界条件，确定其沿线钢轨回流的分布情况。更多还原

【Abstract】 Getting the distribution rule and related characteristics of return propulsion current in rails on electrified railway line has to be done, because it is a basis for understanding how the propulsion current to interfere with signalling and telecommunication systems along the railway and providing the reference for selecting measures of capacity of impedance bonds along the electrified railway.Emphasis is put on analysizing the current existing electrical supply system in Chinese railway such as direct supply type,AT type and BT type.Then mathematical models for these type sare constructed. Based on various boundary conditions,and using mathematical models,the distribution rule of return propulsion current in rails can be built.更多还原