储能科学与技术 ›› 2017, Vol. 6 ›› Issue (1): 78-84.doi: 10.12028/j.issn.2095-4239.2016.0006

• 研究开发 • 上一篇    下一篇

全钒液流电池的柔性充放电控制

邱  亚1，李  鑫1，魏  达2，余  玲1   

  1. 1合肥工业大学电气与自动化工程学院，安徽 合肥 230009；2湖南德沃普电气股份有限公司，湖南 邵东 422800
  • 收稿日期:2016-03-28 修回日期:2016-05-26 出版日期:2017-01-03 发布日期:2017-01-03
  • 通讯作者: 邱亚（1989—），女，博士研究生，研究方向为储能系统建模与控制，E-mail：qiuya123634@163.com；
  • 作者简介:邱亚（1989—），女，博士研究生，研究方向为储能系统 建模与控制，E-mail：qiuya123634@163.com；
  • 基金资助:
    国家能源局“2015年能源自主创新和能源装备专项”专项。

Flexible charge-discharge control of vanadium redox battery

QIU Ya1, LI Xin2, WEI Da1, YU Ling2   

  1. 1School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, Anhui, China;
    2 Hunan DOVOP Electric incorporated company, Shaodong 422800, Hunan, China
  • Received:2016-03-28 Revised:2016-05-26 Online:2017-01-03 Published:2017-01-03

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摘要： 全钒液流电池（vanadium redox battery，VRB）具有大容量，长寿命、安全可靠、对环境无污染等特点。为了保证全钒液流电池安全充放电并提高电池充电速度，本文提出基于内核电压估计的三闭环柔性充放电控制策略。该策略采用SOC环、电压环和电流环的三闭环结构，三个控制器均采用带限幅值的PI调节器。SOC外环可根据给定SOC值和实际SOC大小，判断电池充电或者放电；电压环采用预估的内核电压进行反馈，实现电池恒压充电；电流环可实现电池恒流充电。其中内核电压可根据全钒液流电池端电压、充放电电流及电池参考模型去预估。最后本文在Simulink上搭建了5 kW/30 kW·h的VRB模型进行仿真验证。结果表明，该控制策略下，电池充电时间缩短近40%，且保证内核电压不超调，实现了VRB的安全充放电。

关键词: 全钒液流电池, 柔性充放电控制, 内核电压估计, 三闭环

Abstract: Vanadium Redox Battery (VRB) has the advantages of large capacity, long service, safety and environmentally friendly. In order to ensure safe charge-discharge and increase the charge speed of Vanadium Redox Battery (VRB), the three closed-loop flexible charge-discharge control strategy which is based on estimated core voltage is proposed. This strategy uses three closed-loop structure, namely SOC loop, voltage loop and current loop. PI regulator with the limit value is used in these three loops. It determines the battery to charge or discharge by comparing the given SOC value and actual SOC value in SOC outer loop. The estimated core voltage is used as feedback in voltage loop, achieving constant voltage charge of VRB. Current loop can achieve constant current charge of VRB. Kernel voltage can be estimatyed by VRB voltage, charge and discharge current and reference model. Finally, a 5 kW/30 kW·h VRB model is builded on Simulink to verify the characteristic of VRB. The results show that the charge time decreases by nearly 40% via using the control strategy, which also ensures the core voltage non-overshoot and achieves safe charge-discharge of VRB.

Key words: vanadium redox battery (VRB), flexible charge-discharge control, estimated core voltage, three closed-loop