考虑高频损耗的ZPW-2000A轨道电路暂态响应分析  

Transient Response Analysis Considering ZPW-2000A Track Circuit with High Frequency Loss

作　　者：赵斌[1] 陈磊 欧静宁 王东 于光昊 ZHAO Bin;CHEN Lei;OU Jingning;WANG Dong;YU Guanghao(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070

出　　处：《中国铁道科学》2023年第1期186-193,共8页China Railway Science

基　　金：国家自然科学基金资助项目(51967010)。

摘　　要：针对ZPW-2000A轨道电路高频损耗下暂态响应采用现有方法存在的计算难度大、耗时长的问题,提出在复频域内轨道电路接收端轨面电压的求解方法。首先,基于传输线理论,建立轨道电路传输线模型;其次,利用该模型及节点导纳法,得到节点导纳时域方程并对其进行拉普拉斯变换,考虑高频损耗后将复频域方程变换解耦,求得轨道电路接收端轨面电压复频域解;最后,采用傅里叶变换及Q-D算法,得到轨面电压时域解。在对求解方法进行验证的基础上,分析高频损耗、频率、分路电阻、调谐区状态和道床电阻等因素对轨道电路暂态响应的影响。结果表明:与时域有限差分法对比,求解方法的误差在8%以内,且计算耗时短;考虑高频损耗的轨道电路接收端轨面电压小于未考虑高频损耗;轨面电压降随分路电阻的增大而减小,而随道床电阻的增大而增大。求解方法可以准确、高效地分析高频损耗下ZPW-2000A轨道电路暂态响应,可为轨道电路的暂态响应分析提供理论参考。Aiming at the difficulties in application and time-consuming problems in existing methods when calculating the transient response of ZPW-2000A track circuit with high frequency loss,a method for solving rail surface voltage at the receiving end of the track circuit in the complex frequency domain is proposed.Firstly,based on the transmission line theory,the transmission line model of track circuit is established.Secondly,using the model and the node admittance method,the time-domain equation of node admittance is obtained,which allows Laplace transform to be performed onto the equation.Since considering the high frequency loss,the complex frequency domain equation is transformed and decoupled to obtain the solution of the complex frequency domain of the rail surface voltage at the receiving end of the track circuit.Finally,the time-domain solution of the rail surface voltage is obtained using Fourier transform and Q-D algorithm.Based on the verification of the solution method,the influences of factors such as high frequency loss,frequency,shunt resistance,state of tuning area and ballast resistance on the transient response of track circuit,are analyzed.The results show that compared with the finite-difference time-domain method,the error of the proposed solution method is less than 8%,and the calculation time is short.The rail surface voltage at the receiving end of the track circuit with high frequency loss is less than that without considering high frequency loss.The rail surface voltage drop decreases with the rise of shunt resistance and increases with the rise of ballast resistance.The proposed solution method can accurately and efficiently analyze the transient response of ZPW-2000A track circuit with high frequency loss and provide a theoretical reference for the transient response analysis of track circuit.

关 键 词：ZPW-2000A轨道电路 高频损耗 节点导纳法 Q-D算法 复频域 暂态响应 

分 类 号：U284.22[交通运输工程—交通信息工程及控制]