Impact of non-minimum-phase zeros on the weak-grid-tied VSC

Wu, Guanglu and Zhao, Bing and Zhang, Xi and Wang, Shanshan and Egea-Àlvarez, Agusti and Sun, Yuany uan and Li, Yingbiao and Guo, Deyang and Zhou, Xiaoxin (2020) Impact of non-minimum-phase zeros on the weak-grid-tied VSC. IEEE Transactions on Sustainable Energy. ISSN 1949-3037 (https://doi.org/10.1109/TSTE.2020.3034791)

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Abstract

Right-half-plain (RHP) zeros can significantly deteriorate a control system’s dynamic performances as it exhibits non-minimum-phase behaviors. In this paper, we investigate the occurrence mechanism of RHP zeros in weak-grid-tied VSCs as well as provide guidance for minimizing their effects. A reduced order multi-input multi-output (MIMO) transfer function of the weak-grid-tied VSC is firstly obtained. Then, the single-input single-output (SISO) transfer function to study the impact of the RHP zeros on the power response is further derived. The existence of RHP zeros is examined by applying the Routh criterion on the numerator of the SISO open-loop transfer function. We find that RHP zeros can exist either when the VSC works as an inverter or a rectifier. Furthermore, large grid impedance values as well as operation points with high active power values can result in a non-minimum-phase system. It is also shown that RHP zeros limit the minimum PLL bandwidth. Simulation results and RTDS experiments validate the correctness of the analysis and the conclusions obtained.

ORCID iDs

Wu, Guanglu, Zhao, Bing, Zhang, Xi, Wang, Shanshan, Egea-Àlvarez, Agusti ORCID logoORCID: https://orcid.org/0000-0003-1286-6699, Sun, Yuany uan, Li, Yingbiao, Guo, Deyang ORCID logoORCID: https://orcid.org/0000-0003-0821-0953 and Zhou, Xiaoxin;
  • Item type:Article
    ID code:74448
    Dates:
    Date
    Event
    29 October 2020
    Published
    29 October 2020
    Published Online
    25 October 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:29 Oct 2020 15:59
    Last modified:14 Nov 2024 01:15
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/74448
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