基于荷电状态图权重的储能系统电池网络重构研究  

Research on Battery Network Reconstruction for Energy Storage Systems Based on Charge State Diagram Weight

作　　者：赵航 张旭[2] 刘欢 肖逗 张博 党建[2] ZHAO Hang;ZHANG Xu;LIU Huan;XIAO Dou;ZHANG Bo;DANG Jian(Xianyang Power Supply Company of Shaanxi Electric Power Company,Xianyang 712099,China;College of Electrical Engineering,Xi′an University of Technology,Xi′an 710054,China)

机构地区：[1]国网陕西省电力公司咸阳供电公司,陕西咸阳712099 [2]西安理工大学电气工程学院,陕西西安710054

出　　处：《电工技术》2023年第7期13-18,共6页Electric Engineering

摘　　要：电化学储能系统中单体电池的特性差异给储能系统的能量效率、安全可靠运行造成了一定隐患。可重构网络式数字储能利用高频电力电子装置对连续能量流的离散化和数字化是储能未来研究方向之一。为此,开展了基于荷电状态图的储能系统电池网络重构研究。首先,在分析现有重构电池网络特点的基础上提出了一种旁路阵列式可重构电池拓扑,并通过灵活控制开关获取开路电压和荷电状态SOC。其次,基于图深度优先遍历的思路,提出了一种荷电状态图的储能系统电池网络重构策略。最后,在搭建的可重构式电池网络实验平台进行了验证。结果表明,基于荷电状态图的储能系统电池网络重构可有效避免单体电池劣化带来的木桶效应,对提升储能系统高效运维有一定指导意义。Differences in the characteristics of individual cells in electrochemical energy storage systems make the energy efficiency,safe and reliable operation of energy storage systems a hidden problem.Reconfigurable network digital energy storage is one of the future research directions of energy storage,which uses high-frequency power electronic devices to discretize and digitize the continuous energy flow.In this regard,the battery network reconstruction of energy storage system based on state of charge diagram is studied.Firstly,based on the analysis of the characteristics of the existing reconstructed battery network,a bypass array reconfigurable battery topology is proposed,and the open-circuit voltage and state-of-charge SOC are obtained through the flexible control switch.Secondly,based on the idea of graph depth priority traversal,a battery network reconstruction strategy of energy storage system with state of charge diagram is proposed.Finally,a reconfigurable battery network experimental platform is built for validation.The results show that the reconfiguration of the battery network of the energy storage system based on the charge state diagram can effectively avoid the barrel effect caused by the degradation of the single battery,and has certain guiding significance for improving the efficient operation and maintenance of the energy storage system.

关 键 词：电池荷电状态 图计算 可重构网络 电池储能 

分 类 号：TM910[电气工程—电力电子与电力传动]