直流微电网电压恢复与电流分配分布式控制策略  

Distributed Control Strategy for Voltage Restoration and Current Sharing of DC Microgrid

作　　者：吴涵 高浩林 朱振华 郑皖宁 桑子夏 黄家祺 WU Han;GAO Haolin;ZHU Zhenhua;ZHENG Wanning;SANG Zixia;HUANG Jiaqi(School of Information Science and Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Economic&Technology Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077,China)

机构地区：[1]武汉科技大学信息科学与工程学院,湖北武汉430081 [2]国网湖北省电力有限公司经济技术研究院,湖北武汉430077

出　　处：《控制工程》2023年第12期2333-2339,共7页Control Engineering of China

基　　金：国家自然科学基金资助项目(61903283,62173259,62303360);湖北省自然科学基金资助项目(2022CFB110)。

摘　　要：针对直流微电网电压恢复与电流分配问题,提出一种基于离散时间分布式二次控制的分层控制方法。首先,基于下垂控制的压降来设计二次控制的输入,从而实现对下垂控制造成电压偏差的补偿;然后,对于二次控制输入中包含的全局信息,分别设计了一阶和二阶动态平均一致算法,用于实现对全局平均值的分布式估计,并给出了平均一致算法的收敛性分析和系统稳定性分析,建立了实现电压恢复和电流分配时控制参数与步长的表达式关系;最后,采用仿真实验验证了所提控制方法的可行性,并对比了所提2种算法下分布式二次控制的性能,实验结果验证了所提方法的可行性与有效性。A hierarchical control method based on discrete-time distributed secondary control is proposed for the voltage recovery and current distribution in DC microgrid.Firstly,the input of the secondary control is designed based on the voltage drop of the droop control,so as to realize the compensation of the voltage deviation caused by the droop control;Then,for the global information contained in the secondary control input,the first-order and second-order dynamic average consensus algorithms are designed respectively to realize the distributed estimation of the global average value,and the convergence analysis and system stability analysis of the average consensus algorithm are given,and the expression relationship between the control parameters and the step size in the realization of voltage recovery and current distribution is established.Finally,the feasibility of the proposed control method is verified by simulation experiments.The performance of distributed secondary control under the two proposed algorithms is compared,and the experimental results show the feasibility and effectiveness of the proposed method.

关 键 词：直流微电网 电压恢复 电流调节 分布式控制 二次控制 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]