基于分布式策略的直流微电网下垂控制器设计  

Design of Droop Controller for DC Microgrid Based on Distributed Strategy

作　　者：卢自宝[1,2] 钟尚鹏 郭戈 LU Zi-Bao;ZHONG Shang-Peng;GUO Ge(College of Physics and Electronic Information,Anhui Nor-mal University,Wuhu 241000;Anhui Provincial Engineering Laboratory on Information Fusion and Contrt of Intelligent Ro-bot,Anhui Normal University,Wuhu 241000;State Key Laboratory of Synthetical Automation for Industrial Process,Northeastern University,Shenyang 110004;Northeastern University Qinhuangdao Campus,Qinhuangdao 066004)

机构地区：[1]安徽师范大学物理与电子信息学院,芜湖241000 [2]安徽师范大学安徽省智能机器人信息融合与控制实验室,芜湖241000 [3]东北大学流程工业综合自动化国家重点实验室,沈阳110004 [4]东北大学秦皇岛分校,秦皇岛066004

出　　处：《自动化学报》2021年第10期2472-2483,共12页Acta Automatica Sinica

基　　金：国家自然科学基金(61503003,U1808205);安徽省自然科学基金(2008085MF199)资助。

摘　　要：本文研究了分布式控制策略下直流微电网的负荷分配和电压平衡问题.给出一种新的基于分布式策略的下垂控制器设计方法,能够在统一的框架下实现直流微电网负载共享和电压平衡.首先,将直流微电网的负载共享和电压平衡问题转化为多目标优化问题,其性能指标与微源的容量密切相关.然后,通过求解多目标优化问题获得实现负载共享和电压平衡的集中式控制策略,并给出下垂控制器的设计方法.为了降低系统的通信负担,给出一种新的只需与邻居节点交换信息的分布式控制策略,通过理论分析可知该分布式控制策略能够收敛到多目标优化问题的最优解.最后,通过对新能源汽车充换电站系统的仿真验证了本文提出的方法的有效性.This paper is concerned with the issue of load sharing and voltage balance of DC microgrid under distributed control strategy.A new design method of droop controller based on distributed strategy is presented,which can realize load sharing and voltage balance under a uniform framework.Firstly,the problems of the load sharing and voltage balance of DC microgrid are transformed into multi-objective optimization problems which performance index is closely related to the capacity of distributed generations.Then,the centralized control strategy achieving load sharing and voltage balance is obtained by solving the multi-objective optimization problem,and the design method of droop controller is given.In order to reduce the communication burden of the system,a new distributed control strategy which only needs to exchange information with neighbor nodes is proposed.The theoretical analysis shows that the distributed control strategy can converge to the optimal solution of multi-objective optimization problem.Finally,the effectiveness of the proposed method is verified by the simulation of the new energy vehicle charging and changing station system.

关 键 词：分布式控制 多目标优化 电压平衡 负载分配 下垂控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]