电工技术学报2018，Vol.33Issue(8)：1919-1928,10.DOI:10.19595/j.cnki.1000-6753.tces.161812
基于级联多电平直流变换器的超级电容储能系统能量自均衡控制策略
Self-Balancing Control Strategy for Super Capacitor Energy Storage System Based on Cascaded Multilevel DC-DC Converter
摘要
Abstract
Energy-balancing control is one of the key problems to be solved urgently in energy storage system. This paper proposes an energy self-balancing control strategy based on cascaded multilevel super capacitor energy storage system. This strategy adopts super capacitor state-of-charge (SOC) to build separated half bridge sub-module current loops. Accordingly, the average operating current of each module can be independently controlled according to super capacitor SOC. Therefore, the proposed strategy can directly use system current to achieve energy balance between sub-modules without affecting the current response of system. Meanwhile, to solve the issue of the balancing speed reduction in the process of energy balance, a weight coefficient based on SOC is designed to promote the balancing speed. The proposed strategy does not affect the ability of energy storage system to stabilize DC bus voltage, avoids the external balancing circuit, and simplifies the entire control of energy storage system. At last, the proposed strategy is verified by the experimental results.关键词
超级电容能量管理系统/级联多电平直流变换器/双向/DC-DC/变换器/能量自均衡控制Key words
Super capacitor energy management system/cascaded multilevel DC-DC converter/bidirectional DC-DC converter/energy self-balancing control分类
信息技术与安全科学引用本文复制引用
毕恺韬,安群涛,段建东,凡绍桂,孙力..基于级联多电平直流变换器的超级电容储能系统能量自均衡控制策略[J].电工技术学报,2018,33(8):1919-1928,10.基金项目
国家自然科学基金(51207029、51277040、51507039),中央高校基本科研业务费专项资金(HIT.NSRIF.2017013)和中国博士后科学基金(2016M591529)资助项目. （51207029、51277040、51507039）
