摘要
通过某重载铁路站场牵引回流的现场试验,测量绝缘节2侧4条钢轨、上行侧吸上线及上下行侧横向连接线的回流情况;基于该站场基本参数,采用EMTP软件,建立不考虑各导线相互间耦合影响、仅考虑线路阻抗影响的牵引回流系统基础仿真模型,以及考虑钢轨、回流线、接触线和供电线相互影响的耦合仿真模型,并以实测数据验证耦合仿真模型的正确性;研究直接供电方式下横向连接线、接触线长度和上下行钢轨间距等因素对牵引回流分配的影响,并进行实例验证。结果表明:基于耦合仿真模型的仿真结果与实测结果一致;牵引回流的分配比例主要受接触线、钢轨、回流线及供电线相互之间的耦合影响,且各导线的耦合作用对站场上行侧回流线回流影响最为显著,回流分配系数为0.298;各导线间耦合作用是造成钢轨不平衡电流的主要原因。
Through the field test of traction return current in a heavy haul railway station,the return current conditions of 4 rails on 2 sides of the insulation joint,the upper side suction line on the upper side and the transverse connecting lines on upper and lower sides were measured.Based on the basic parameters of the station,the EMTP software was used to establish the basic simulation model of traction return current system considering only the line impedance effect instead of the mutual coupling effect between the lines and the coupling simulation model considering the mutual effect between the rail,return current line,contact line and power supply line.And the validity of the coupling simulation model was verified by the measured data.The influence of the transverse connecting line,the length of the contact line,the distance between the upper and lower side rails and other factors on the distribution of traction return current under direct power supply mode was studied and the results were verified by the case study.The results show that the simulation results based on the coupling simulation model are consistent with the measured results.The distribution ratio of traction return current is mainly affected by the coupling between the contact line,rail,return current line and power supply line.The coupling effect of each line has the most significant influence on the return current of the upper side return current line of the station,and the return current distribution coefficient is 0.298.The coupling between lines is the main reason for the unbalanced rail current.
作者
曹晓斌
王满想
朱传林
何玉峰
CAO Xiaobin;WANG Manxiang;ZHU Chuanlin;HE Yufeng(School of Electrical Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;Taian Power Supply Company,State Grid Shandong Electric Power Company,Taian Shandong 271000,China)
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2021年第4期137-144,共8页
China Railway Science
基金
国家自然科学基金资助项目(51507145)。
关键词
重载铁路
直接供电
牵引回流
耦合作用
回流分配系数
Heavy haul railway
Direct power supply
Traction return current
Coupling effect
Return current distribution coefficient
