考虑通信延时的不确定直流微电网H_∞控制器设计  

H_∞ Controller Design for Uncertain DC Microgrid Considering Communication Time Delays

作　　者：邓玮璍 王淑芬 DENG Weihua;WANG Shufen(College of Electrical Engineering,Shanghai University of Electric Power,Yangpu District,Shanghai200090,China)

机构地区：[1]上海电力学院电气工程学院

出　　处：《电网技术》2018年第12期4053-4060,共8页Power System Technology

基　　金：国家自然科学基金项目(51607110);上海市自然科学基金项目资助(15ZR1417500)~~

摘　　要：针对直流微电网中参数不确定和通信延时问题,提出了控制器设计方法以保证系统母线电压稳定。首先,基于范数有界不确定和时滞依赖模型采用小信号法建立直流微电网系统模型。其次,利用Lyapunov方法分析系统稳定性并给出了以线性矩阵不等式(linear matrix inequality,LMI)表示的控制器求解条件。最后,通过数值仿真验证了所提模型和控制方法的有效性。An H∞ control approach of the DC microgrid system with uncertain parameters and communication delays is investigated.Firstly,norm bounded uncertainty and delay-dependent model are employed to depict indeterminacy and delays.And the small-signal method is used to establish the microgrid system model.Then,Lyapunov method is adopted to analyze stability of the system and sufficient existence condition of the controller is given in form of linear matrix inequality(LMI).Finally,simulations verify validity of the proposed model and control method.

关 键 词：直流微电网 不确定系统 时滞系统 线性矩阵不等式 H∞控制器 

分 类 号：TM721[电气工程—电力系统及自动化]