Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter

Abdul Moeed Amjad; Kamyar Mehran; Shady Gadoue

doi:10.1109/APEC39645.2020.9124055

Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter

Abdul Moeed Amjad
, Kamyar Mehran
, Shady Gadoue

Queen Mary University of London

Research output: Chapter in Book/Published conference output › Conference publication

2 Citations (Scopus)

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 language	English
Title of host publication	APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
Publisher	IEEE
Pages	2487-2491
Number of pages	5
ISBN (Electronic)	9781728148298
DOIs	https://doi.org/10.1109/APEC39645.2020.9124055
Publication status	Published - 25 Jun 2020
Event	35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 - New Orleans, United States Duration: 15 Mar 2020 → 19 Mar 2020

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Publisher	IEEE
Volume	2020-March
ISSN (Print)	1048-2334
ISSN (Electronic)	2470-6647

Conference

Conference	35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Country/Territory	United States
City	New Orleans
Period	15/03/20 → 19/03/20

Funding

The authors would like to thank Higher Education Commission (HEC) Pakistan and Queen Mary University of London to provide necessary funding and facilities to carry out the research under the grants HRDI-UESTPs/UETs and ECS1020B respectively.

Access to Document

10.1109/APEC39645.2020.9124055

Cite this

Amjad, A. M., Mehran, K., & Gadoue, S. (2020). Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter. In APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition (pp. 2487-2491). Article 9124055 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2020-March). IEEE. https://doi.org/10.1109/APEC39645.2020.9124055

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title = "Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter",

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.",

author = "Amjad, \{Abdul Moeed\} and Kamyar Mehran and Shady Gadoue",

year = "2020",

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booktitle = "APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition",

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note = "35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 ; Conference date: 15-03-2020 Through 19-03-2020",

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Amjad, AM, Mehran, K & Gadoue, S 2020, Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter. in APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition., 9124055, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, vol. 2020-March, IEEE, pp. 2487-2491, 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020, New Orleans, United States, 15/03/20. https://doi.org/10.1109/APEC39645.2020.9124055

Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter. / Amjad, Abdul Moeed; Mehran, Kamyar; Gadoue, Shady.
APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition. IEEE, 2020. p. 2487-2491 9124055 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2020-March).

Research output: Chapter in Book/Published conference output › Conference publication

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T1 - Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter

AU - Amjad, Abdul Moeed

AU - Mehran, Kamyar

AU - Gadoue, Shady

PY - 2020/6/25

Y1 - 2020/6/25

N2 - 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.

AB - 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.

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Online Harmonic Elimination Pulse Width Modulation Method for Modular Multilevel Converter

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