Strategies for decoupling internal and external dynamics resulting from inter-arm passive component tolerances in HVDC-MMC

Wang, Shuren and Adam, Grain and Massoud, Ahmed and Holliday, Derrick and Williams, Barry; (2019) Strategies for decoupling internal and external dynamics resulting from inter-arm passive component tolerances in HVDC-MMC. In: 2019 IEEE Energy Conversion Congress and Exposition. IEEE, Piscataway, NJ, pp. 209-213. ISBN 9781728103952 (https://doi.org/10.1109/ECCE.2019.8912177)

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Abstract

Modular Multilevel Converter (MMC) performance may be adversely affected by passive component tolerances, such as submodule capacitance and arm inductance variations. Depending on control strategies, the differences in equivalent capacitances and/or inductances of the upper and lower arms of one phase-leg can cause unequal power distribution between upper and lower arms. Assuming passive component tolerances ranging between ±10%, this paper presents a comprehensive assessment of the internal/external coupling effects due to the passive component tolerances within one phase-leg, under the control of common MMC balancing methods. A novel control strategy is proposed to suppress the fundamental component that arises in the dc-link current due to such tolerances, and its effectiveness is demonstrated via simulation and experimentation. The investigation shows that voltage-based common and differential mode balancing control provides effective ac offset suppression while the proposed method offers superior performance in terms of dc-link fundamental current ripple suppression.

  • Item type:Book Section
    ID code:71416
    Dates:
    Date
    Event
    28 November 2019
    Published
    1 May 2019
    Accepted
    Notes:© 2019 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:11 Feb 2020 09:26
    Last modified:15 Apr 2024 13:41
    URI:https://strathprints.strath.ac.uk/id/eprint/71416
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