电缆参数对ZPW-2000A轨道电路接收侧传输性能的影响研究

Study on Impacts of Cable Parameters on Transmission Performance of ZPW-2000A Track Circuit'Receiving Side

电缆参数对ZPW-2000A轨道电路信号传输性能具有显著的影响.在构建轨道电路传输模型的基础上,利用轨道电路计算的方法,系统地研究了电缆电阻、电感、电容及长度等参数对轨道电路接收侧传输性能的影响规律.研究结果表明,随着电缆线间电容的增加,接收侧电缆输入阻抗模值出现先增大后减小,输入阻抗相位角逐渐降低的趋势.该研究对基于电缆固有特性设计的轨道电路产品维护及轨道电路故障排除,具有重要的意义.

Cable parameters have substantial impacts on the signal transmission performance of ZPW-2000 A track circuit. By building a transmission model of the track circuit, the impacts of cable parameters including resistance, inductance, capacitance and length of cable on the transmission properties of the receiving side of ZPW-2000 A track circuit are systematically studied. It turns out that the input impedance magnitude may firstly increases and then decrease while the phase angle of the input impedance tends to decreases gradually with increase of the inter-cable capacitance. The study is significant for the maintenance of the track circuit products that are designed based on the inherent characteristics of the cables as well as the trouble shooting of the track circuit.