SOC equalization control strategy for DC microgrid based on voltage compensation
尹聪聪 1王大治 1刘博 1张千一 2高家元 3赵晋斌4
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作者信息
1. 国网浙江省电力有限公司余姚市供电公司,浙江 余姚 315400
2. 上海电力大学电气工程学院,上海 200090
3. 长沙理工大学 电气与信息工程学院,湖南 长沙 410000
4. 教育部海上风电技术工程研究中心(上海电力大学),上海 200090
折叠
摘要
储能系统是直流微电网的关键组成部分,针对多个储能单元荷电状态(state of charge,SOC)不一致产生的过充或过放问题,提出了一种具有电压补偿的SOC均衡控制策略.该方法在下垂控制中引入一个与SOC有关的补偿函数,且能根据SOC的变化进行动态调整,从而改变储能变流器输出电流的大小,实现SOC均衡和负荷电流的合理分配.最后通过对比试验验证了该方法的有效性,与传统方法相比,能够更加快速实现SOC的均衡,确保直流微电网的稳定运行.
Abstract
Energy storage systems are a crucial component of direct current microgrids.To address the issues of overcharging or over-discharging caused by inconsistent state of charge(SOC)among multiple energy storage units,we propose a SOC balancing control strategy that incorporates voltage compensation.This method introduces a compensation function related to SOC within the droop control framework,allowing for dynamic adjustments based on SOC variations.Consequently,this approach modifies the output current of the energy storage converters,facilitating SOC balancing and the rational distribution of load currents.Experimental comparisons demonstrate the effectiveness of this method,which achieves SOC equilibrium more rapidly than traditional approaches,ensuring stable operation of the direct current microgrid.
关键词
光伏/直流微电网/电压补偿/SOC/下垂控制
Key words
PV/DC microgrid/voltage compensation/state of charge/droop control
维普
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