{"title":"An Overcurrent Protection Control Strategy of Three-Phase Inverter for Stand-alone Distributed Generation Systems","authors":"Guanjun Li, Saijin Huang, Haojie Yu, Xiangyu Wang","doi":"10.1109/ICCSI55536.2022.9970566","DOIUrl":null,"url":null,"abstract":"This paper investigates the output voltage tracking problem of three-phase inverters for the stand-alone distributed generation systems (DGSs). Overcurrent protection is also taken into consideration. Conventionally, cascade control scheme is utilized to restrict the currents by reference current signals. However, it is hard to realize rapid dynamic response due to the limited bandwidth of the inner current control loops. To solve the above problems, this paper designs a novel current-constraint controller under a noncascade structure. The proposed single-loop control scheme not only ensures the currents within specified ranges but also retains good dynamic performances. Moreover, the proposed controller has a simple structure which overcomes drawbacks of the cascade controller and reduces cost of hardware. Rigorous stability analysis is given under the proposed control scheme. Simulation results are also illustrated to validate the feasibility and effectiveness of the presented controller.","PeriodicalId":421514,"journal":{"name":"2022 International Conference on Cyber-Physical Social Intelligence (ICCSI)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 International Conference on Cyber-Physical Social Intelligence (ICCSI)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICCSI55536.2022.9970566","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
This paper investigates the output voltage tracking problem of three-phase inverters for the stand-alone distributed generation systems (DGSs). Overcurrent protection is also taken into consideration. Conventionally, cascade control scheme is utilized to restrict the currents by reference current signals. However, it is hard to realize rapid dynamic response due to the limited bandwidth of the inner current control loops. To solve the above problems, this paper designs a novel current-constraint controller under a noncascade structure. The proposed single-loop control scheme not only ensures the currents within specified ranges but also retains good dynamic performances. Moreover, the proposed controller has a simple structure which overcomes drawbacks of the cascade controller and reduces cost of hardware. Rigorous stability analysis is given under the proposed control scheme. Simulation results are also illustrated to validate the feasibility and effectiveness of the presented controller.