冲击电压激励下轨道交通过渡电阻快速测量方法

Rapid Measurement Method of Transition Resistance in Rail Transit Under Impulse Voltage Excitation

钢轨对排流网的过渡电阻是影响杂散电流的最主要因素。为了快速测量过渡电阻,根据钢轨中的波过程和快速傅里叶变换原理,提出了利用冲击电压源的新型测量方法。首先,基于ATP-EMTP软件搭建钢轨模型进行仿真,验证了冲击法的有效性;然后,结合现场实测钢轨对排流网过渡电阻的数据,进一步验证了冲击法的可靠性和准确性。

The transition resistance of the rail to the discharge network is the most important factor affecting the stray current.In order to quickly measure the transition resistance,based on the fast Fourier transform and the wave process in the rail,a new measurement method using the impulse voltage source is proposed.Firstly,based on ATP-EMTP software,the rail model is constructed for simulation to verify the validity of the inrush method,and then combined with the field measurement of the transition resistance of the rail to the discharge network,the reliability and accuracy of the impulse method is further verified.