电工技术学报  2018, Vol. 33 Issue (8): 1919-1928    DOI: 10.19595/j.cnki.1000-6753.tces.161812
电池储能与微网应用 |
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
毕恺韬, 安群涛, 段建东, 凡绍桂, 孙力
哈尔滨工业大学电气工程及自动化学院 哈尔滨 150001
Self-Balancing Control Strategy for Super Capacitor Energy Storage System Based on Cascaded Multilevel DC-DC Converter
Bi Kaitao, An Quntao, Duan Jiandong, Fan Shaogui, Sun Li
School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001 China
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摘要 储能系统中能量均衡控制是亟需解决的关键问题之一。针对级联多电平超级电容储能系统,提出一种能量自均衡控制策略。该策略利用超级电容荷电状态(SOC)建立半桥子模组独立电流闭环系统,使各子模组平均工作电流可根据超级电容SOC进行独立控制。因此,在不影响系统电流响应的前提下,该策略可直接利用系统电流进行模组间能量均衡。同时,为了解决能量均衡过程中均衡速度降低的问题,设计一种基于SOC的权重系数以提升均衡速度。该策略不仅不影响储能系统稳定母线电压的能力,同时还避免外加均衡电路的使用,简化了储能系统的整体控制策略。最后,通过实验验证了所提方法的有效性。
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毕恺韬
安群涛
段建东
凡绍桂
孙力
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    
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.
Key wordsSuper capacitor energy management system    cascaded multilevel DC-DC converter    bidirectional DC-DC converter    energy self-balancing control   
收稿日期: 2016-11-18      出版日期: 2018-04-24
PACS: TM921  
基金资助: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
通讯作者: 安群涛 男,1984年生,博士,副教授,研究方向为电机控制以及新能源发电技术。   
作者简介: 毕恺韬 男,1989年生,博士研究生,研究方向为大功率储能系统以及电力电子变换器故障诊断等。E-mail: 1039351556@qq.com
引用本文:   
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. Bi Kaitao, An Quntao, Duan Jiandong, Fan Shaogui, Sun Li. Self-Balancing Control Strategy for Super Capacitor Energy Storage System Based on Cascaded Multilevel DC-DC Converter. Transactions of China Electrotechnical Society, 2018, 33(8): 1919-1928.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.161812          https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I8/1919