中央发送两端电流接收式无绝缘轨道电路的断轨态分析  

Analysis on the Broken Rail Mode of a Track Circuit of Centre-Fed Double-Side Current-Received Type

作　　者：田铭兴[1] 陈云峰[2] 赵斌[1] 闵永智[1] 

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]兰州铁路局工务处,甘肃兰州730000

出　　处：《中国铁道科学》2010年第6期103-108,共6页China Railway Science

基　　金：甘肃省自然科学基金资助项目(2008GS02623)

摘　　要：分析中央发送两端电流接收式无绝缘轨道电路,必须考虑电流传感器参数及其接收电路等效阻抗对轨道电路的影响。通过电路变换,推导轨道电路接收端及轨道电路的等效电路,建立轨道电路断轨态等效电路及其二端口网络模型。根据等效电路,推导断轨态数学模型,给出传输矩阵参数以及接收端钢轨电流、感应电压和转移阻抗的计算公式。算例结果表明:电流传感器参数及其接收电路等效阻抗对轨道电路的影响,可以通过分析传感器等效阻抗参数对轨道电路的转移阻抗的影响得到;传感器等效阻抗越小,转移阻抗越小,则电流传感器处钢轨电流及其感应电压越大;当传感器等效阻抗为零时的算例结果与文献[4]的有关结果一致,说明给出的分析方法和结论是可信的,并且说明文献[4]是本文在传感器等效阻抗为零条件下的特例。While analyzing a track circuit of centre-fed double-side current-received type,the impact of the parameters of the current sensors and the equivalent impedances of the receiving circuits on the track circuit must be taken into account.By transforming the circuits,the equivalent circuits of the receiving ends and the track circuit are derived,and the two-port network model of the track circuit are developed under the broken rail mode of operation.According to the equivalent circuit,the mathematical model under the broken rail mode of operation,and the formulae for calculating the parameters of the transfer matrix,the currents of rails at the receiving ends,the induced voltages of the current sensors and the transfer impedances of the track circuit are presented.The results of an example show that the impact of the parameters of the current sensors and the equivalent impedances of the receiving circuits on the track circuit can be known by analyzing the impact of the equivalent impedance parameters of the current sensors on the transfer impedances of the track circuit.The smaller the equivalent impedance of the sensor is,the smaller the transfer impedance is,and then the larger the current of a rail at the sensor and the induced voltage are. While the equivalent impedance of the sensor is zero,the results of the example agree well with the rele-vant one of reference[4].This interprets the analysis methods and conclusions are credible,and reference [4]is a special case under the condition that the equivalent impedance of the sensor is zero in this paper.

关 键 词：轨道电路 断轨 电流传感器 等效电路 数学模型 

分 类 号：U216.3[交通运输工程—道路与铁道工程]