大容量链式电池储能系统及其充放电均衡控制  

Large scaled cascaded battery energy storage system with charge/discharge balancing

作　　者：金一丁[1] 宋强[1] 刘文华[1] 

机构地区：[1]清华大学电力系统及发电设备控制和仿真国家重点实验室,北京100084

出　　处：《电力自动化设备》2011年第3期6-11,共6页Electric Power Automation Equipment

基　　金：国家重点实验室自主研究课题(SKLD09M13)~~

摘　　要：为实现高母线电压、大容量的城网储能,结合链式DC/AC变流器拓扑及多重化双向DC/DC变流技术,提出一种适合于大容量、多储能模块的电池储能系统结构。该储能系统可以不通过升压变压器直接接入10 kV以上电压等级母线,并可在较低开关频率下达到良好的输出谐波特性;系统中每个串联单元的直流电压可在电池组端电压的基础上进一步提高,并允许多组电池并联接入。针对三角接链式系统提出了三级电池充放电均衡策略。电磁暂态仿真实验的结果验证了相关控制策略的有效性。In order to connect large scaled energy storage to high voltage bus in urban distribution network,a battery energy storage system topology for the large scaled and multi-modular systems is proposed,which combines the cascaded converter topology with the interleaved bi-directional DC / DC conversion technology.The designed system can directly connect to 10 kV bus and above without transformer and achieve better output harmonics performance under lower switching frequency.The DC voltage of each serial module can be boosted based on the battery output voltage and the parallel connection of battery groups is allowed.A simulation system based on delta configuration is built with three-level charge / discharge balancing control.The control effectiveness is verified by EMTDC simulative results.

关 键 词：电池储能 链式变流器 多重化双向DC/DC 电池充放电均衡控制 

分 类 号：TM912[电气工程—电力电子与电力传动]