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A new stability enhancement method using KF estimation for the PWM-SMC-based grid-tied inverter under weak grid condition

Chen Bolin, Wu Weimin, Gao Chunxiao, Orabi Mohamed, Koutroulis Eftychios, Chung Henry, Blaabjerg, Frede, 1963-

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URIhttp://purl.tuc.gr/dl/dias/73BC042C-026F-42FB-8F7B-8F5A542D3D9F-
Identifierhttps://doi.org/10.1109/JESTPE.2022.3178733-
Identifierhttps://ieeexplore.ieee.org/document/9784841-
Languageen-
Extent10 pagesen
TitleA new stability enhancement method using KF estimation for the PWM-SMC-based grid-tied inverter under weak grid conditionen
CreatorChen Bolinen
CreatorWu Weiminen
CreatorGao Chunxiaoen
CreatorOrabi Mohameden
CreatorKoutroulis Eftychiosen
CreatorΚουτρουλης Ευτυχιοςel
CreatorChung Henryen
CreatorBlaabjerg, Frede, 1963-en
PublisherInstitute of Electrical and Electronics Engineersen
DescriptionThis work was supported in part by the program Bilateral and Multilateral Research and Technology Co-Operation between Greece and China under Grant 2017YFE0134300 and Grant eSOLAR/T7ΔKI-00066.en
Content SummaryA sliding-mode control (SMC) technology is widely used in inductor-capacitor-inductor (LCL)-filtered grid-tied inverters (GTIs) due to its strong robustness against parameter drift. However, under weak grid conditions, the steady performance of GTI using conventional pulsewidth-modulation-based SMC (PWM-SMC) degrades, resulting in increased harmonics in grid-injected currents. One reason is that the voltage feedforward term at the point of common coupling (PCC) in the SMC loop causes the phase margin of the inverter output impedance to decrease. Another reason is that the gain of conventional PWM-SMC-based systems is not high enough, especially under weak grid conditions. This article proposes a PCC feedforward voltage reconstruction method (named KF-PWM-SMC) for a PWM-SMC-based controller using Kalman filter (KF) estimation. As a result, the phase and magnitude of the inverter output impedance at the desired frequency can be significantly improved. Moreover, the proposed PCC feedforward voltage extraction method can save the PCC voltage control sensor, thereby improving the reliability of the whole system. A 3-kW experimental GTI based on the dSPACE DS1202 platform has been developed to verify the feasibility of the proposed control strategy.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2023-12-07-
Date of Publication2022-
SubjectGrid-tied inverter (GTI)en
SubjectKalman filter (KF)en
SubjectInductor-capacitor-inductor (LCL) filteren
SubjectPoint of common coupling (PCC) voltage feedforwarden
SubjectSliding-mode control (SMC)en
SubjectWeak griden
Bibliographic CitationB. Chen, W. Wu, C. Gao, M. Orabi, E. Koutroulis, H. Chung, and F. Blaabjerg, "A new stability enhancement method using KF estimation for the PWM-SMC-based grid-tied inverter under weak grid condition," IEEE J. Emerging Sel. Top. Power Electron., vol. 10, no. 6, pp. 6950-6959, Dec. 2022, doi: 10.1109/JESTPE.2022.3178733.en

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