Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter

Abdul Moeed Amjad, Kamyar Mehran, Shady Gadoue

    Research output: Chapter in Book/Published conference outputConference publication

    Abstract

    Modular multilevel converters (MMCs) are widely used for DC to AC power conversion; however, they produce switching harmonics resulting in poor power quality and system performance. Several offline methods including harmonic elimination pulse width modulation (HEPWM) have been proposed to suppress these harmonics; however, they do not guarantee smooth and rapid operation of power system under varying loads. In this work, novel online technique which combines merits of Differential Evolution (DE) and Newton Raphson (NR) methods to solve complex simultaneous transcendental trigonometric set of HEPWM equations is proposed. Simulation results have cemented the viability of the algorithm as it solves HEPWM equations in only (on average) 5 iterations (normally hundreds of iterations are required in offline solution). In addition, the THD value of filtered line to line output voltage is restricted to less than 0.5% of the fundamental component which is significantly better than 8% and 5% limits allowed by IEEE standard 519-2014. Hardware results are also presented which verify the applicability of proposed algorithm under online conditions.

    Original languageEnglish
    Title of host publicationAPEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
    PublisherIEEE
    Pages2487-2491
    Number of pages5
    ISBN (Electronic)9781728148298
    DOIs
    Publication statusPublished - 25 Jun 2020
    Event35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 - New Orleans, United States
    Duration: 15 Mar 202019 Mar 2020

    Publication series

    NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
    PublisherIEEE
    Volume2020-March
    ISSN (Print)1048-2334
    ISSN (Electronic)2470-6647

    Conference

    Conference35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
    Country/TerritoryUnited States
    CityNew Orleans
    Period15/03/2019/03/20

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