城市轨道交通轨道电路基本参数的研究

Research on the Basic Parameter of Track Circuit in Urban Rail Transit

针对上海轨道交通轨道电路基本参数研究现状,分析了城市轨道交通轨道电路的原理及传输特性。提出利用开路短路二电压法测算城市轨道交通轨道电路的基本参数。轨道交通整体道床或碎石道床的轨道电路,其钢轨电阻随频率的增大而增大,钢轨电感随频率的增大而减小,道床电阻随频率的增大而减小,轨间电容随频率的增加而减小。

According to some researches of the track circuit parameter for Shanghai rail transit, this paper analyzes the principle and the transmission characters of the track circuit for urban rail transit,discusses the method for testing and calculating the track circuit parameters, and comes to the conclusion that the frequency is a key to decide the track resistance, track inductance and the capacity volume between tracks.