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  • Sensitivity Based Voltage Support Strategy to Enhance Dynamic Stability of Islanded Microgrid

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    Afrin522308-Accepted.pdf (7.004Mb)
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    Version of Record (VoR)
    Author(s)
    Afrin, N
    Islam, M
    Lu, J
    Yang, F
    Griffith University Author(s)
    Yang, Fuwen
    Lu, Junwei
    Year published
    2022
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    Abstract
    Every network contains different characteristics. In particular, microgrids have unique features compared to utility grids such as high resistance to reactance ratio(R/X). Consequently, both active and reactive current injection is likely to improve the dynamic voltage stability (DVS) of the islanded microgrids. Therefore, instead of injecting only reactive current, both active and reactive current is injected in the proposed voltage support(VS) strategy. Contrarily, without considering the distinctive characteristics of the network, other strategies with both active and reactive current injection provide fixed and uniform ...
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    Every network contains different characteristics. In particular, microgrids have unique features compared to utility grids such as high resistance to reactance ratio(R/X). Consequently, both active and reactive current injection is likely to improve the dynamic voltage stability (DVS) of the islanded microgrids. Therefore, instead of injecting only reactive current, both active and reactive current is injected in the proposed voltage support(VS) strategy. Contrarily, without considering the distinctive characteristics of the network, other strategies with both active and reactive current injection provide fixed and uniform active and reactive current for all networks. To convey the distinctive features of network, voltage sensitivity subject to active and reactive current injection is used in the proposed VS strategy. As a consequence, unlike other strategies, the proposed strategy provides unique combination of active and reactive current for every network. The concept and derivation of the proposed strategy is described. Voltage sensitivity analysis is carried out to determine the sensitivity coefficients. The effectiveness of the proposed strategy is theoretically demonstrated and compared with other strategies. Case studies and result analysis on two islanded microgrids show that the proposed VS strategy for photovoltaic system is capable of enhancing the DVS of islanded microgrids compared to other strategies.
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    Journal Title
    IEEE Transactions on Power Delivery
    Volume
    37
    Issue
    4
    DOI
    https://doi.org/10.1109/TPWRD.2021.3123405
    Copyright Statement
    © 2021 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.
    Note
    This publication has been entered as an advanced online version in Griffith Research Online.
    Subject
    Electrical engineering
    Publication URI
    http://hdl.handle.net/10072/410347
    Collection
    • Journal articles

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