摘要
地铁供电计算是地铁中压环网设计的关键部分,决定着地铁安全运行的可靠、稳定性。首先提出了地铁某线在正常运行、相邻主变电所解列、相邻牵引所故障、任一段电缆故障四种工况下,电缆载流量的计算方法;基于此初步选出了中压环网的电缆截面。为了验证所选电缆是否合理,分别推导出了电缆在地铁正常运行和主变电所解列时电压降的计算方法。经计算可得,电缆电压降未超过额定电压的5%,且在西安地铁3号线的设计中得到验证,从而为地铁设计前期中压环网的供电计算提供了依据。
The calculation of subway power supply is the key part of the design of subway medium voltage ring network,which determines the reliability and stability of subway safe operation.In this paper,the calculation method of cable load flow under four working conditions of normal operation,adjacent main substation,adjacent traction station and any section of cable fault is put forward,and the cable cross section of medium voltage ring network is preliminarily selected.In order to verify the reasonableness of the selected cable,the calculation methods of voltage drop of the cable when the subway is in normal operation and the main substation is unlisted are derived respectively.The calculated results show that the cable voltage drop does not exceed 5%of the rated voltage,and has been verified in the design of Xi′an Metro Line 3.Thus,it provides the basis for the power supply calculation of the middle voltage ring network in the early stage of subway design.
作者
李敏华
郭昆丽
高子伟
Li Minhua;Guo Kunli;Gao Ziwei(School of Electronic Information,Xi′an Polytechnic University,Xi′an 710048,China)
出处
《国外电子测量技术》
2020年第2期132-137,共6页
Foreign Electronic Measurement Technology
基金
陕西省大学生创新创业训练计划项目(20190808)资助.
关键词
中压环网
供电计算
电缆载流
电压降
电缆选型
medium voltage ring network
power supply calculation
cable carrier current
voltage drop
cable selection
作者简介
李敏华,硕士,主要研究方向为城市轨道交通供电系统设计,E-mail:liminhua363@163.com;郭昆丽,硕士,副教授,主要研究方向为电力系统运行与控制,E-mail:761104139@qq.com;高子伟,本科,主要研究方向为电力系统运行与控制,E-mail:1639791573@qq.com
