铁路20 kV架空电力贯通线输电能力分析  

Analysis on Transmission Capacity of Railway 20 kV Overhead Power Through the Line

作　　者：郭闻龙 田铭兴[1,2] GUO Wen-long;TIAN Ming-xing(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou730070,China;Rail Transit Electrical Automation Engineering Laboratory of Gansu Province,Lanzhou Jiaotong University,Lanzhou730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]兰州交通大学甘肃省轨道交通电气自动化工程实验室,兰州730070

出　　处：《兰州交通大学学报》2022年第6期62-68,共7页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(52167013);甘肃省高等学校创新基金(2021A-046);甘肃省科技计划项目(17JR5RA083);。

摘　　要：长期以来,我国铁路电力贯通线大多采用10 kV电压等级,但随着国家电网对20 kV配电网建设的推进,铁路电力贯通线采用20 kV电压等级越来越受到重视.为了分析20 kV架空电力贯通线的输电能力,基于架空电力贯通线的集中参数等效电路,推导表示输电能力的电压偏移、输电效率和负荷力矩的计算公式,并将其用于架空电力贯通线的算例分析.结果表明:20 kV架空电力贯通线较10 kV架空电力贯通线的电压偏移明显减少,输电效率明显提高,负荷力矩明显增大,说明了20 kV架空电力贯通线较10 kV架空电力贯通线具有更大的输电能力,可为20 kV架空电力贯通线的建设提供参考.For a long time,most of China′s railway power through the line have adopted the 10 kV voltage level,but with the advancement of the construction of 20 kV distribution network by the State Grid,the use of 20 kV voltage level for railway power through the line has received more and more attention.In order to analyze the transmission capacity of 20 kV overhead power through the line,the study deduces the calculation formulas of voltage offset,transmission efficiency and load torque representing the transmission capacity based on the centralized parameter equivalent circuit of overhead power through the line,and applies them to the overhead power example analysis through the line.The results show that the voltage offset of 20 kV overhead power through line is significantly reduced,the transmission efficiency is significantly improved,and the load torque is significantly increased compared with the 10 kV overhead power through the line.It shows that 20 kV overhead power through the line has greater transmission capacity than the 10 kV overhead power through the line,which can provide a reference for the construction of 20 kV overhead power through the line.

关 键 词：电力贯通线 架空线路 输电能力 

分 类 号：U223[交通运输工程—道路与铁道工程]