基于温升的牵引变电所导线选型研究  

Research onconductor selection of railway traction substation based on temperature rise

作　　者：巨轩同 JU Xuantong(China Railway First Surveyand Design Institute Group Co.,Ltd.,Xi’an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《粘接》2022年第7期161-164,共4页Adhesion

摘　　要：导线温升校验是导线选择的一项重要指标,牵引负荷相对常规负荷波动性大、随机性强,单纯依据导线长期载流量选择牵引变电所导线,会造成导线能力过剩的情况。以实际测试数据为基础,研究了牵引负荷引起的焦耳热,分析化简了热平衡方程内表面散热和对流散热公式,通过吸热与散热功率在时间上的积分得到导体净吸收热量,从而依据导线最大允许吸收热量判断选择牵引变电所导线型号。Conductor temperature rise verification is an important index of conductor selection.Compared with conventional load,traction load has large fluctuation and strong randomness.Simply selecting traction substation conductor based on long-term current carrying capacity of conductor will lead to excess conductor capacity.Based on the actual test data,this paper studies the Joule heat caused by traction load,analyzes and simplifies the internal surface heat dissipation and convective heat dissipation formula of heat balance equation,obtains the net heat absorbed by conductor through the integration of heat absorption and heat dissipation power in time,and then judges and selects the conductor type of traction substation according to the maximum allowable heat absorbed by conductor.

关 键 词：温升校验 热平衡方程 导线选择 

分 类 号：TM922.42[电气工程—电力电子与电力传动]