基于跨相式单相逆变器的牵引供电光伏储能系统多层解耦控制策略  

Multi-layer Optimal Control Strategy for Traction Photovoltaic and Energy Storage System Based on Interphase Bridging Inverter-railway Energy Router

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4期1477-1487,I0020,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

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

摘　　要：在电气化铁路牵引供电系统中,铁路能量路由器(railway energy router,RER)用于回收列车制动能量、接入光伏等新能源,同时改善负序、无功等电能质量,但是既有结构包含两套逆变器和变压器,存在成本高、工程应用难的问题。为此,提出一种基于跨相式单相逆变器的新型铁路能量路由器结构,其交流侧跨接α/β相牵引母线、直流侧接入光伏储能。首先,推导新型结构的数学模型和工作原理;然后,针对逆变器传统两端口模式转变为RER的三端口模式存在的有功/无功耦合问题,提出增加无功补偿装置的硬件解耦方法;其次,针对新型RER三端口间多向能流问题,提出一种多层协调优化控制策略。最后,基于典型工况及实测数据,进行了仿真验证,结果表明:三相电压不平衡度从2.52%降低至1.58%,平均功率因数从0.688上升至0.966,再生制动回收率61.65%,光伏消纳率94.16%;主设备容量降低42.31%,成本降低37.23%,说明所提新型RER在实现现有RER相同功能的前提下大幅降低了成本,具有重要的理论和工程价值。The railway energy router(RER)is a crucial device in electrified railway systems,serving to improve power quality,recover braking energy,and utilize renewable energy.However,the conventional topology of RER requires transformers and inverters with doubled operational power capacity,leading to high costs and limiting industrial applicability.To tackle this issue,this paper proposes a novel interphase bridging inverter structure-based railway energy router(IBI-RER),with its AC side bridging theα-phase andβ-phase traction bus and its DC side integrating photovoltaic power and energy storage.First,the operation principle and energy transfer mode of this structure are analyzed.To address the active and reactive power coupling resulting from the transition of the inverter’s traditional two-port mode to the IBI-RER’s three-port mode,a hardware decoupling method with reactive power compensation devices is proposed.Additionally,to manage multi-directional energy flows among the three ports for the IBI-RER,a multi-layer optimal control strategy is introduced.Finally,based on the typical operation conditions and the measured data,a comparative analysis with the conventional RER is performed.The results show that,under the same function,the proposed IBI-RER has the advantages of simple structure and lower cost.

关 键 词：牵引供电系统 光伏发电系统 储能系统 再生制动 单逆变器跨相式铁路能量路由器 多层优化控制 

分 类 号：TM73[电气工程—电力系统及自动化]