高压直挂大容量储能系统的电池堆分割方法  

Battery Stack Segmentation Method of the Large-capacity High-voltage Transformerless Battery Energy Storage System

作　　者：刘畅[1] 吴西奇 姜新宇 李睿[1] 周党生 付金建 蔡旭[1] LIU Chang;WU Xiqi;JIANG Xinyu;LI Rui;ZHOU Dangsheng;FU Jinjian;CAI Xu(The Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education(Department of Electrical Engineering,Shanghai Jiao Tong University),Minhang District,Shanghai 200240,China;Guangzhou Zhiguang Energy Storage Technology Co.,Ltd.,Guangzhou 510760,Guangdong Province,China;Shenzhen Hopewind Electric Co.,Ltd.,Shenzhen 518055,Guangdong Province,China)

机构地区：[1]电力传输与功率变换控制教育部重点实验室(上海交通大学电气工程系),上海市闵行区200240 [2]广州智光储能科技有限公司,广东省广州市510760 [3]深圳市禾望电气股份有限公司,广东省深圳市518055

出　　处：《中国电机工程学报》2023年第19期7483-7496,共14页Proceedings of the CSEE

基　　金：国家自然科学基金(面上项目)(51777124)。

摘　　要：高压直挂电池储能系统每相所需电池单体数量巨大,这些电池单体可被等效看作一个大容量电池堆,级联的H桥功率单元将此电池堆分割成一定数量的电池簇接入其直流侧,不同分割簇数对应每相级联功率模块数,是系统的最重要参数,对系统性能影响显著,应综合考虑系统效率及安全性对分割簇数进行优化设计。系统效率及安全性与电池参数密切相关,但基于电池单体详细物理参数建立系统效率和安全性评估模型的实施难度大,因此,该文提出一种基于电池单体容量参数分布情况建立系统效率和安全性评估模型的方法,避免大量的电池参数辨识及海量数据的处理工作,为系统功率模块数优化设计提供了理论指导。A large quantity of battery cells are required by each phase of the high-voltage transformerless battery energy storage system(BESS),which can be equivalent to a large battery stack.The cascaded H-bridge converter segments the stack into battery clusters,which are connected to the DC side of the H-bridge converter.The number of segmented clusters is corresponding to the number of cascaded power modules in per phase,which is the most important parameter of the system and has a significant influence on system performance,such as system efficiency and security.And they are closely related to battery parameters.The number of cascaded power modules should be optimized by considering system efficiency and security comprehensively.However,it is impossible to establish the system efficiency evaluation model and safety model under different number of segmentation clusters based on the detailed parameters of each cell.Therefore,a method for establishing system efficiency and safety evaluation model based on the capacity distribution of the cells is proposed.The massive battery parameter identifications and data processing are avoided.The proposed method provides theoretical guidance for the optimization design of the cascaded number of power modules.

关 键 词：高压直挂电池储能系统 电池堆分割 效率 安全性 优化设计 

分 类 号：TM911[电气工程—电力电子与电力传动]