基于公共直流母线的链式可拓展电池储能系统及控制  

Control and Analysis of Extensible Cascaded Battery Energy Storage System Based on a Common DC Bus

作　　者：金一丁[1] 宋强[1] 刘文华[1] 

机构地区：[1]电力系统国家重点实验室,清华大学电机系,北京市100084

出　　处：《电力系统自动化》2010年第15期66-70,共5页Automation of Electric Power Systems

基　　金：国家重点实验室自主研究课题(SKLD09M13)资助

摘　　要：随着储能系统的容量不断增大,储能装置将被接入10kV或更高等级电网。城市电网对于接入装置的电能质量要求越来越高,同时工频变压器的占地与噪声等问题是限制大容量城网储能系统发展的突出问题。对此,文中提出一种基于公共直流母线的链式电池储能系统,该系统采用链式多电平拓扑接入电网,并以多组移相全桥DC/DC变流器替代工频变压器,储能装置通过各自独立的接口电路与直流负荷一起连接到公共直流母线上。该系统易于实现模块化,可灵活拓展,也便于不同种类、不同特性的储能电池接入。设计了该系统的主电路拓扑、控制体系与各部分控制器,并基于电磁暂态仿真验证了控制系统的有效性。Along with the augmentation of energy storage systems’capacity,energy storage devices can be connected to the 10 kV and above networks. The increasing power quality requirement of urban network along with the space and noise of the industrial frequency transformers are the limiting factors to the large scale energy storage system applications in the urban network. To address these issues,this paper proposes a new topology of cascaded battery energy storage system based on a common DC bus. Several dual active bridge DC/DC converters are applied to substitute the industrial frequency transformers,and the energy storage modules are connected to a common DC bus through separate interfacing circuits. The system is more modular and easy to be extended. They also provide easy access for different kinds of batteries. The main circuit of the new energy storage system is designed,with proper mathematical models and control system. The EMTDC simulation results verify the effectiveness of the proposed system.

关 键 词：链式变流器 电池储能系统 移相全桥DC/DC 公共直流母线 

分 类 号：TM910[电气工程—电力电子与电力传动]