基于切换系统的独立微电网稳定控制设计  

Stability Control Design of Isolated Microgrid Based on Switched System

作　　者：孙丽颖[1] 林永鑫 SUN Liying;LIN Yongxin(School of Electrical Engineering,Liaoning University of Technology,Jinzhou 121000,China)

机构地区：[1]辽宁工业大学电气工程学院,辽宁锦州121000

出　　处：《控制工程》2024年第2期203-211,共9页Control Engineering of China

基　　金：辽宁省教育厅重点攻关项目(JZL201915401)。

摘　　要：独立微电网是一个复杂的非线性系统,为解决典型光储柴独立微电网在能源约束下存在控制单元切换的问题,提出将非线性切换系统理论应用到主从控制下的主控单元切换问题上。首先,当主从控制下的储能系统和柴油发电机分别作为主控单元时,将它们视为两个子系统,建立非线性切换系统模型。然后,应用多Lyapunov函数法分析切换系统的稳定性,同时利用backstepping方法分别设计子系统的非线性控制器,保留系统的非线性特征。最后,采用美国国家能源实验室开发的仿真软件中的硬充电策略作为切换策略,保证切换过程中系统的稳定性。通过MATLAB仿真证明了所设计方法的有效性。In order to solve the problem of control unit switched in typical isolated microgrid with light and diesel storage under energy constraints,since the isolated microgrid is a complex nonlinear system,the nonlinear switched system theory is applied to the switching problem of master control unit under master-slave control.Firstly,the energy storage system and diesel generator under master-slave control are regarded as two subsystems when they are the main control units,and a nonlinear switched system model is established.Then,the multiple Lyapunov functions method is used to analyze the stability of the switched system,and the backstepping method is used to design the nonlinear controllers of the subsystems,which preserves the nonlinear characteristics of the system.Finally,the hard charging strategy in the simulation software developed by the National Energy Laboratory of the United States is adopted as the switching strategy to ensure the stability of the system during the switching process.MATLAB simulation proves the effectiveness of the design method.

关 键 词：微电网 主从控制 切换系统 反步法 多LYAPUNOV函数 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]