基于跨相式-背靠背混合结构的铁路牵引用光伏储能系统及其优化控制策略  

Railway Traction Photovoltaic Energy Storage System Based on a Hybrid Structure of Interphase-bridging and Back-to-back Inverters and Its Optimization Control Strategy

作　　者：廉静如 戴朝华[1] 姚志刚 陈维荣[1] LIAN Jingru;DAI Chaohua;YAO Zhigang;CHEN Weirong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,Sichuan Province,China)

机构地区：[1]西南交通大学电气工程学院,四川省成都市611756

出　　处：《中国电机工程学报》2025年第9期3519-3529,I0020,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：北京市自然科学基金项目(L221002);四川省科技计划项目(2022NSFSC1899);国家自然科学基金项目(52107210)。

摘　　要：针对传统背靠背结构的铁路能量路由器因需要两套逆变器导致所需容量大且成本高的问题,该文提出一种跨相式单相逆变器与背靠背结构相结合的混合拓扑结构。首先,分析了混合结构的工作原理及工作模式,以解构两种结构之间的功率互补关系;然后,针对不同工作模式下的优化目标,提出一种混合结构功率优化控制策略,以实现跨相式和背靠背两种结构的有功/无功优化分配;最后,基于典型工况和实测数据,验证所提拓扑结构及控制策略的合理性和有效性。实验结果表明:所提混合结构在实现与传统背靠背结构同样回收再生制动能量、消纳光伏功能的同时,逆变器和变压器的容量均降低21.2%;并且可以改善电能质量,其中三相电网负序电压不平衡度从2.46%降低至1.82%、平均功率因数从0.5838提高至0.924,说明新拓扑具有重要理论和工程价值。To address the challenges of the conventional back-to-back railway energy router,which necessitates two sets of inverters leading to high capacity requirements and costs,this paper introduces a hybrid structure integrating an interphase bridging inverter with the conventional topology.Firstly,the operational principles and modes of the hybrid structure are analyzed.Subsequently,a power flow optimization control strategy is proposed to determine the active and reactive power of the hybrid structure railway energy router for different operational modes.Finally,the correctness and effectiveness of the proposed topology and control strategy are verified based on typical scenarios and measured data.In comparison to the conventional railway energy router,the novel topology offers distinct advantages.While retaining the functionality of recovering regenerative braking energy and accommodating photovoltaic,it also enhances power quality,resulting in a 21.2%reduction in both inverter and transformer capacities.

关 键 词：牵引供电系统 光伏发电系统 储能系统 再生制动 跨相式-背靠背混合结构铁路能量路由器 功率优化控制 

分 类 号：TM922[电气工程—电力电子与电力传动]