ZPW-2000A型无绝缘移频轨道电路补偿方案研究

在现场的应用中,ZPW-2000A型无绝缘移频轨道电路在安全性和可靠性方面有着显著优势,但其分路特性的改善是需要关注的问题。采用电平衰耗法的计算方法,对无补偿电容、有补偿电容和有最佳补偿电容时的无绝缘轨道电路的分路特性进行分析,并用Matlab软件仿真得到轨面各点的分路灵敏度和分路残压比较结果。结果表明,补偿电容对轨道电路的分路特性有明显的改善作用,而找到最佳补偿电容值对轨道电路进行补偿,不但能同时保证轨道电路全程可靠分路,并且降低了分路残压,使得无绝缘轨道电路的分路特性更稳定。

Research on Compensation Capacitance Scheme of ZPW-2000A Non-insulated Track Circuit

The field application shows the obvious advantages of ZPW-2000 A non-insulated track circuit in security and reliability, but its shunt characteristic still needs to be improved. The shunt characteristics of the track circuit with and without compensation capacitor and with optimal compensation capacitor are analyzed and shunt sensitivity and shunt residual voltage of the track circuit at each track surface point are compared and simulated with MATLAB simulation software. The results show that the compensation capacitor improves remarkably the shunt characteristic of the track circuit and the best compensation capacitance can not only guarantee track circuit reliability but also reduce the shunt residual pressure,and make the shunt characteristic of the non-insulated track circuit more stable.