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This paper studies the output tracking control problem for this type of inverter system with unknown state variables and external disturbance. Firstly, the system\u2019s mathematical model is established by using Kirchhoff\u2019s voltage\/current law. And the model is transformed into a Brunovsky state space form by choosing appropriate state variables. Based on the characteristics of the state space equations, a Levant differentiator state observer is designed to estimate the unknown state variables within finite time. Next, a high gain disturbance observer is constructed to estimate the unknown external disturbance. Subsequently, an output feedback robust tracking controller is designed using the sliding mode control technique, the estimated values of the state variables and disturbance. The presented controller can eliminate the influence of disturbance and enables the inverter system to quickly track the desired trajectory. The numerical simulation experimental results verify the effectiveness and superiority of our developed method.<\/jats:p>","DOI":"10.1177\/09596518251326969","type":"journal-article","created":{"date-parts":[[2025,3,26]],"date-time":"2025-03-26T03:30:37Z","timestamp":1742959837000},"page":"1506-1514","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Output feedback tracking control of LCL-type inverter system based on state and disturbance observers method"],"prefix":"10.1177","volume":"239","author":[{"given":"Mengling","family":"Ma","sequence":"first","affiliation":[{"name":"School of Automation and Electrical Engineering, Linyi University, Linyi, Shandong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3776-7945","authenticated-orcid":false,"given":"Ancai","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Automation and Electrical Engineering, Linyi University, Linyi, Shandong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenbo","family":"Zheng","sequence":"additional","affiliation":[{"name":"School of Automation and Electrical Engineering, Linyi University, Linyi, Shandong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinghui","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Automation and Electrical Engineering, Linyi University, Linyi, Shandong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jianlong","family":"Qiu","sequence":"additional","affiliation":[{"name":"School of Automation and Electrical Engineering, Linyi University, Linyi, Shandong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,3,26]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-pel.2019.1049"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1515\/ijeeps-2021-0040"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.3390\/en14133907"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2019.2897544"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2017.2667409"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2018.2875030"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.23919\/CJEE.2018.8409353"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.3390\/en7128036"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.matpr.2020.10.116"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-rpg.2013.0078"},{"issue":"3","key":"e_1_3_2_12_2","article-title":"Single-phase inverter-control techniques for interfacing renewable energy sources with microgrid\u2014part II: series-connected inverter topology to mitigate voltage-related problems along with active power flow control","volume":"26","author":"Dasgupta S","year":"2011","unstructured":"Dasgupta S, Sahoo SK, Panda SK, et al. 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