ZPW-2000A调谐区SVA阻抗值对调谐区品质因数的影响分析  

Analysis of Influence of SVA Impedance on Quality Factor of ZPW-2000A Tuning Zone

作　　者：黄文轩 Huang Wenxuan(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi’an 730000,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安730000

出　　处：《铁路通信信号工程技术》2021年第1期101-108,共8页Railway Signalling & Communication Engineering

摘　　要：ZPW-2000A无绝缘轨道电路调谐区由1型调谐单元、钢轨、空心线圈、2型调谐单元构成,本区段所连接的调谐单元显容性,钢轨、空心线圈和邻区段连接的调谐单元呈感性,这两部分形成并联谐振。分析普速铁路ZPW-2000A空心线圈SVA阻抗值对整体谐振电路的影响,提出调谐区小轨道电路品质因数的计算方法,通过提高调谐区品质因数,可以改善钢轨传输的稳定性,增强调谐区选频性能。The tuning zone of ZPW-2000A jointless track circuit is composed of type 1 tuning unit,rail,air core coil,and type 2 tuning unit.The tuning unit to which the section is connected is capacitive,and the tuning unit to which the adjacent section is connected with the rails and air core coils is inductive.The two parts form a parallel resonance.This paper analyzes the influence of the SVA impedance value of the ZPW-2000A air core coil on the whole resonant circuit,and proposes a method for calculating the quality factor of the small rail circuit in the tuning zone.By improving the quality factor of the tuning zone,the stability of the rail transmission can be improved and the frequency selection performance of the tuning zone can be enhanced.

关 键 词：无绝缘轨道电路 空心线圈 调谐区 品质因数 

分 类 号：U284.238[交通运输工程—交通信息工程及控制]