考虑执行器故障的直流微电网主动容错控制  

Active Fault Tolerant Control for DC Microgrids with Actuator Faults

作　　者：焦炎涛 丁李 JIAO Yantao;DING Li(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《控制工程》2023年第12期2347-2354,共8页Control Engineering of China

基　　金：国家自然科学基金资助项目(62373290,62173256);国家重点研发计划项目(2019YFE0118700)。

摘　　要：针对直流微电网电压调节控制系统中的执行器故障问题,提出了一种基于故障诊断观测器的H∞容错控制方案。首先,通过分析直流微电网的电气结构,构造了故障诊断观测器,并给出了基于传统自适应观测器的故障估计算法,实现了执行器故障的实时在线观测;在此基础上,利用故障信息,设计了基于静态输出反馈的H∞容错控制器,保证了直流微电网电压调节控制系统的稳定性;最后,采用仿真实验测试所提控制方案的性能。实验结果表明,相对于传统的被动容错控制,基于故障诊断观测器的主动容错控制在提升系统的鲁棒性与容错能力上具有更好的效果。A fault diagnosis observer-based H∞fault tolerant control scheme is proposed to solve the problem of actuator faults in voltage regulation control system of DC microgrids.Firstly,by analyzing the electrical structure of the DC microgrid,a fault diagnosis observer is constructed,and the conventional adaptive observer-based fault estimation algorithm is given to online real-time estimate the actuator faults occurred in the system.On this basis,using the fault information,a static output feedback-based H∞fault tolerant controller is designed to ensure the stability of voltage regulation of the DC microgrid.Finally,the performance of the proposed control scheme is tested by simulation experiments.The experimental results show that,compared with the conventional passive fault tolerant control methods,the fault diagnosis observer-based active fault tolerant control strategy has a better performance on improving the robustness and fault tolerant ability of the system.

关 键 词：直流微电网 执行器故障 容错控制 故障诊断观测器 

分 类 号：TP11[自动化与计算机技术—控制理论与控制工程]