基于精细时程积分法的轨道电路暂态分析

Transient Analysis for Track Circuit Based on Precise Time-integration

轨道电路分路不良会导致轨道电路分路态的误判,严重影响列车的行车安全和运输效率。依据传输线理论建立轨道电路传输线的数学模型,提出基于精细时程积分法的轨道电路时域响应求解方法。在此基础上结合轨道电路调整态和分路态的边界条件,仿真分析了接收端轨面电流信号的变化情况,并针对不同初始参数对其影响进行了分析。结果表明,利用精细时程积分法求得的时域解符合轨道电路的传输特性;轨道电路在工作状态改变的瞬间,接收端轨面电流信号将发生暂态变化,该过程可作为轨道电路分路态的一种判断依据。可消除分路不良对其影响。

Shunt malfunction can lead to misjudging of the shunt state of track circuit, which has an adverse effect on operation safety and efficiency of trains. In this paper, a mathematical model of the transmission lines for track circuit is established based on the transmission-line theory. The time domain solution of track circuit are calculated with the precise time-integration method. With the combination of the boundary conditions of track circuit in adjusting and the shunt state, changes of the receiving end current are simulated, with investigation into the influence of the variation of the different initial parameters. The results show that the time domain solutions by the precise time-integration method, conform to transmission characteristics of track circuit. And there exists a transient current signal when the working state of track circuit changes, which can be used as a judgment of the shunt state of track circuit and can eliminate the effects of shunt malfunction.