并接道岔跳线对轨道电路传输特性影响分析OA

The turnout jumper wire is a key component of the integrated track circuit within high-speed railway stations,and its configuration directly impacts the transmission performance and signal stability of the track circuit.Taking the ZPW-2000 track circuit as the research object,this paper systematically investigated effects of parallel-connected turnout jumper wires on the track circuit's transmission characteristics.Utilizing uniform transmission line theory,a four-terminal network transmission model for the track circuit with multiple parallel jumper wires was established,and a cascaded transmission matrix formula incorporating the jumper wire connection effects was derived.Under different carrier frequency conditions(1 700 Hz,2 000 Hz,2 300 Hz,and 2 600 Hz),the rail surface voltage at the receiving end obtained from theoretical calculations was compared with results from a Simulink simulation model.The results show that the relative error between the theoretical and simulated values is controlled within 6.7%,verifying the accuracy of the model.In addition,the number of jumper wires exhibits a nonlinear positive correlation with the receiving-end voltage,and an optimal balance between transmission performance and engineering economy can be achieved when the jumper wire spacing is 15-20 m.The proposed method provides a theoretical foundation and technical support for the optimized design of track circuits in turnout sections.