大容量电池储能电网接入系统拓扑研究

摘要

从电池储能电网接入系统PCS的基本功能人手，归纳出两类储能系统的基本运行单元，通过对其运行原理的分析，对比了二者之间的优缺点。研究并比较了将多组基本储能单元接入中压电网的各种大容量系统构建方案。重点介绍了一种基于高频隔离的共直流母线型并联PCS结构，该系统在运行特性上相对于传统PCS具有明显的优势，有望在未来获得广泛应用。%This paper starts from the main function of Battery Energy Storage Power Conversion System, generalizing two types of basic operation cells. The two types of PCS cells are compared through the analysis of their operation principle, on basis of that, schemes on connecting numbers of Cells into middle voltage power system to form a large scaled Battery Energy Storage System are studied and compared. Moreover, this paper particularly introduces one parallel PCS structure based on high frequency transformers and a common dc bus, which has great advantage over traditional PCS on operation characteristics, and is expected of widespread use in the future.