直流牵引供电系统钢轨电位与杂散电流分析

Rail Potential and Stray Current of DC Traction Power System

通过建立理想的单边供电模型,采用电流注入法,运用叠加原理对直流牵引供电系流的钢轨电位和杂散电流进行了理论分析,并通过实例进行验证。如果钢轨电阻和荷载一定,钢轨电位和杂散电流主要受轨道对大地的泄漏电导率的影响。泄漏电导率越小,钢轨电位就越高,杂散电流越小;泄漏电导率越大,钢轨电位就小,杂散电流就越大。这种分析方法同样适用于双边供电的复杂牵引供电系统。

An ideal simple one way feeding model is established to carry on a basic rasearch on the theory of rail potential and stray current,and the method of the current injection and superimposed principle are adopted to testify the model,a corresponding result is finally attained.The author argues that this method can also be applied to the complex two way feeding DC traction power supply system.