Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter

Abdul Moeed Amjad, Kamyar Mehran, Shady Gadoue

Research output: Chapter in Book/Report/Conference proceedingConference 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
CountryUnited States
CityNew Orleans
Period15/03/2019/03/20

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