A multi-objective control strategy for three phase grid-connected inverter during unbalanced voltage sag

Ji, Liang and Shi, Jiabin and Hong, Qiteng and Fu, Yang and Chang, Xiao and Cao, Zhe and Mi, Yang and Li, Zhenkun and Booth, Campbell (2020) A multi-objective control strategy for three phase grid-connected inverter during unbalanced voltage sag. IEEE Transactions on Power Delivery. ISSN 0885-8977 (https://doi.org/10.1109/TPWRD.2020.3025158)

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Abstract

This paper presents a new multi-objective control strategy for inverter-interfaced distributed generation (IIDG) to ensure its safe and continuous operation under unbalanced voltage sags. The proposed control strategy can effectively improve the low voltage ride through (LVRT) capability, reduce active power oscillations, and limit overcurrent simultaneously, which are marked as the most important control objectives of IIDG during unbalanced voltage sags. The advanced voltage support scheme, which utilizes positive sequence component, is firstly proposed to maximize the LVRT capability of IIDG during unbalanced voltage sags. Then, to ensure the safety of IIDG, the active power oscillation suppression and current limitation algorithm are designed individually. Based on the control algorithms of such objectives, the multi-objective control method, including scenario classification and reference current determination, is then presented to achieve such three objectives under various system conditions simultaneously. Finally, case studies and evaluations based on MATLAB/Simulink are carried out to illustrate the effectiveness of the proposed method.

ORCID iDs

Ji, Liang, Shi, Jiabin, Hong, Qiteng ORCID logoORCID: https://orcid.org/0000-0001-9122-1981, Fu, Yang, Chang, Xiao, Cao, Zhe, Mi, Yang, Li, Zhenkun and Booth, Campbell ORCID logoORCID: https://orcid.org/0000-0003-3869-4477;
  • Item type:Article
    ID code:73924
    Dates:
    Date
    Event
    18 September 2020
    Published
    18 September 2020
    Published Online
    13 September 2020
    Accepted
    Notes:© 2020 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.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:21 Sep 2020 15:05
    Last modified:02 Dec 2024 04:18
    URI:https://strathprints.strath.ac.uk/id/eprint/73924
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