单三相组合式同相供电系统的负序影响研究  

Study on Impact on Negative Sequence of Single Three-Phase Combined Co-Phase Power Supply System

作　　者：王平祥[1] WANG Pingxiang(China Railway First Survey and 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：《西南交通大学学报》2018年第6期1110-1116,共7页Journal of Southwest Jiaotong University

摘　　要：负序是我国电气化铁路牵引供电系统中存在的主要电能质量问题之一,为研究单三相组合式同相供电系统负序的影响情况,介绍了单三相组合式同相供电系统结构及特点,采用通用方法分别计算了异相供电系统和单三相组合式同相供电系统下牵引负荷产生的负序电流,并对比分析了单三相组合式同相供电系统和异相供电系统中列车处于牵引或再生制动状态下负序影响情况,计算结果表明,单三相组合式同相供电系统平衡变压器绕组容量利用率比YNvd平衡变压器高,其容量利用率最小为85.7%.The negative sequence is one of the main power quality issues in the tractive power supply system inour country. The structure and characteristics of a single three-phase combined co-phase power supply system areintroduced herein, to study the impact of the negative sequence of a single three-phase combined co-phase powersupply system. Negative-sequence currents produced by traction loads of the different phase power supply systemand the single three-phase combined co-phase power supply system were calculated with the generalized method.In addition, the impact of a single three-phase combined co-phase power supply system and the different phasepower supply system on the negative sequence were analyzed in the situation when traction loads are undertraction and regenerative braking. The calculation results indicated that capacity utilization of single three-phasecombined-type balanced transformer winding is at least 85.7%. This is higher than the YNvd connectedtransformer, and the impact of train regenerative braking is lower on the negative sequence.

关 键 词：单三相组合式同相供电系统 再生制动 负序 

分 类 号：U223.2[交通运输工程—道路与铁道工程]