摘要
为了求得轨道电路时域解,对轨道电路传输线方程进行拉氏变换,在复频域求得钢轨线路中每根钢轨电流和钢轨对地电压的通解。在轨道电路送电端阻抗匹配、受电端短路的条件下,求得调整态受电端轨面电流的时域解。通过算例,在不同的初始电气参数下仿真分析了受电端轨面电流的变化情况。结果表明:所得时域解符合轨道电路传输特性,为轨道电路暂态分析提供了有力的理论基础。
In order to obtain the time domain solutions of track circuits,the Laplace transform of the track circuit transmission equation was conducted and the general solutions of the current of each rail and voltage of rail to ground were found in the comlplex frequency domain.Under the condition of sending end impedance matching and receiving end short circuiting,the time domain solution of the receiving end current was obtained for the adjusting state.Through a numerical example,changes of the receiving end current was simulated corresponding to different initial electrical parameters.The results show that the time domain solutions conform to the transmission characteristics of track circuits,thus providing apowerful theoretical basis for transient analysis on track circuits.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2014年第9期68-72,共5页
Journal of the China Railway Society
基金
国家自然科学基金(51247002)
关键词
轨道电路
时域解
拉氏变换
传输线方程
track circuit
solution of time domain
Laplace transform
transmission equation
