电气化铁路牵引变电所群贯通供电系统及其关键技术  

Interconnected Power Supply System of Traction Substation Group and Its Key Technologies for the Electrified Railway

作　　者：李群湛[1] 王辉[1] 黄文勋[2] 解绍锋[1] 马庆安[1] Li Qunzhan;Wang Hui;Huang Wenxun;Xie Shaofeng;Ma Qing’an(School of Electric Engineering Southwest Jiaotong University,Chengdu 611756 China 2.China;Railway First Survey and Design Institute Group Co.Ltd,Xi’an 710043 China)

机构地区：[1]西南交通大学电气工程学院,成都611756 [2]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《电工技术学报》2021年第5期1064-1074,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51877182);中国国家铁路集团有限公司科技研究开发计划(SY2020G001);四川省科技计划(21YYJC3324)资助项目。

摘　　要：结合电气化铁路外部电源供电方式及牵引供电系统供电方式,提出一种牵引变电所群贯通供电系统,并研究相关关键技术方案。首先,根据负序补偿方式将牵引变电所群贯通供电方案分为集中式补偿和分布式补偿两类,其中,集中式补偿方案分为N模式和N+1模式。其次,针对无功型负序补偿方式,将其分为二端口和三端口补偿模式,以YNd11联结变压器为例阐述负序补偿的基本原理,并介绍集中式补偿方案的潮流控制系统。然后,介绍贯通牵引网分段保护与状态辨识技术方案。最后,探讨外部电源方案,并以某线路实测数据为例,研究树形结构下的均衡电流情况,结果表明,构成树形结构的供电方式能够最大限度实现无均衡电流供电。Combined with the external power supply modes of electrified railway and the power supply modes of traction power supply system,the interconnected power supply system of traction substation group is proposed,and its key technical schemes are studied.Firstly,according to the methods of negative sequence compensation,the interconnected power supply schemes of traction substation group are divided into centralized compensation and distributed compensation.Among them,the centralized compensation schemes are divided into N mode and N+1 mode.Secondly,the compensation modes are divided into two-port and three-port for the compensation methods of negative sequence with reactive power.Taking YNd11 connection transformer as an example,the basic principle of negative sequence compensation is illustrated,and the power flow control system of centralized compensation is introduced.Then,the technical scheme of section protection and state identification for interconnected traction network is introduced.Finally,the external power supply scheme is discussed.Taking the measured data of a certain line an example,the balanced current under the situation of tree structure is studied.The results show that the power supply mode of the structure of the tree structure can maximize the power supply without balanced current.

关 键 词：牵引变电所群 贯通供电 负序补偿 静止无功发生器 分段保护与状态辨识 

分 类 号：TM922.3[电气工程—电力电子与电力传动] U223[交通运输工程—道路与铁道工程]