{"title":"Robust tracking control of LCL-type inverter based on fixed-time extended observer method","authors":"Menglin Ma, A. Zhang, Fengzeng Zhu, Haonan Zhang","doi":"10.1109/ICPS58381.2023.10128017","DOIUrl":null,"url":null,"abstract":"Single-phase LCL-type inverter has been widely used in the process of grid connection of photovoltaic system. This paper studies the output tracking control problem for this kind of inverter system with unknown external disturbance. First, the mathematical model of the inverter system is established using Kirchhoff's voltage/current law. And an extended system is constructed based on the inverter model and disturbance. And then, an observer is designed to estimate unknown state variables and external disturbance in a fixed time. After that, an input-output linearization method and the observer variables are used to design a robust tracking controller, which ensures the output of inverter system to accurately track a desired trajectory. Finally, numerical examples demonstrate the validity of the presented theoretical results.","PeriodicalId":426122,"journal":{"name":"2023 IEEE 6th International Conference on Industrial Cyber-Physical Systems (ICPS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2023 IEEE 6th International Conference on Industrial Cyber-Physical Systems (ICPS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPS58381.2023.10128017","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Single-phase LCL-type inverter has been widely used in the process of grid connection of photovoltaic system. This paper studies the output tracking control problem for this kind of inverter system with unknown external disturbance. First, the mathematical model of the inverter system is established using Kirchhoff's voltage/current law. And an extended system is constructed based on the inverter model and disturbance. And then, an observer is designed to estimate unknown state variables and external disturbance in a fixed time. After that, an input-output linearization method and the observer variables are used to design a robust tracking controller, which ensures the output of inverter system to accurately track a desired trajectory. Finally, numerical examples demonstrate the validity of the presented theoretical results.