Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/84454
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dc.contributor.authorLi, Xiaoqiangen
dc.contributor.authorFang, Jingyangen
dc.contributor.authorTang, Yien
dc.contributor.authorWu, Xiaojieen
dc.date.accessioned2019-10-10T05:34:22Zen
dc.date.accessioned2019-12-06T15:45:30Z-
dc.date.available2019-10-10T05:34:22Zen
dc.date.available2019-12-06T15:45:30Z-
dc.date.issued2018en
dc.identifier.citationLi, X., Fang, J., Tang, Y., & Wu, X. (2018). Robust Design of LCL Filters for Single-Current-Loop-Controlled Grid-Connected Power Converters With Unit PCC Voltage Feedforward. IEEE Journal of Emerging and Selected Topics in Power Electronics, 6(1), 54-72. doi:10.1109/JESTPE.2017.2766672en
dc.identifier.issn2168-6777en
dc.identifier.urihttps://hdl.handle.net/10356/84454-
dc.description.abstractThe point of common coupling (PCC) voltage feedforward control is widely employed for LCL-type grid-connected converters to prevent large inrush current during startup, reduce steady-state tracking error, and suppress disturbances of grid voltage. Generally, this feedforward loop is ignored in the system modeling and stability analysis for simplicity. However, the grid impedance would be introduced to the control system through the feedforward loop under practical power grids, leading to a different current loop model from the original one, then conventional LCL filter design for single-current-loop control may be inappropriate. In this paper, the detailed modeling of current control loop with unit PCC voltage feedforward is presented. Based on the established model, it is found that unstable open-loop poles may appear under grid impedance variation, which thus may cause system instability. Therefore, the robust design regions of LCL filters against grid impedance variation are proposed for single-current-loop control schemes. Moreover, another interesting finding is that the feedforward control can help maintain a high current control bandwidth under grid impedance variation. This feature is highly desirable if multiple resonant controllers are employed for harmonic compensation. Experimental results are finally presented to verify the theoretical analysis and robust design presented in this paper.en
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en
dc.format.extent19 p.en
dc.language.isoenen
dc.relation.ispartofseriesIEEE Journal of Emerging and Selected Topics in Power Electronicsen
dc.rights© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/JESTPE.2017.2766672.en
dc.subjectEngineering::Electrical and electronic engineeringen
dc.subjectGrid Impedanceen
dc.subjectLCL Filteren
dc.titleRobust design of LCL filters for single-current-loop-controlled grid-connected power converters with unit PCC voltage feedforwarden
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.identifier.doi10.1109/JESTPE.2017.2766672en
dc.description.versionAccepted versionen
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item.grantfulltextopen-
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