AC Impedance Modeling of Modular Multilevel Converters and Two-Level Voltage-Source Converters: Similarities and Differences

Heng Wu; Xiongfei Wang; Lukasz Kocewiak; Lennart Harnefors

doi:10.1109/COMPEL.2018.8459952

AC Impedance Modeling of Modular Multilevel Converters and Two-Level Voltage-Source Converters: Similarities and Differences

Heng Wu, Xiongfei Wang, Lukasz Kocewiak, Lennart Harnefors

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

43 Citationer (Scopus)

Abstract

This paper presents a small-signal model for modular multilevel converters (MMCs) by using the harmonic state space (HSS) method. The ac output impedance of the MMC is then derived and compared with that of the commonly used two-level voltage-source converters (TL-VSCs). It turns out that the low frequency ac impedance of the MMC differs from that of the TL-VSC, due to the influences of internal dynamics, especially for the open-loop control and the voltage-mode control. In contrast, for the current-mode control, this difference can be minimized by the current regulator with a high-gain in the low frequency range. Moreover, despite the used control schemes, the high frequency ac impedance of the MMC is similar to that of the TL-VSC. The time-domain simulations are provided to validate the effectiveness of the theoretical analysis.

Originalsprog	Engelsk
Titel	Proceedings of the 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)
Antal sider	8
Forlag	IEEE Press
Publikationsdato	10 sep. 2018
Sider	1-8
Artikelnummer	8459952
ISBN (Trykt)	978-1-5386-5542-9
ISBN (Elektronisk)	978-1-5386-5541-2
DOI	https://doi.org/10.1109/COMPEL.2018.8459952
Status	Udgivet - 10 sep. 2018
Begivenhed	19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 - Padova, Italien Varighed: 25 jun. 2018 → 28 jun. 2018

Konference

Konference	19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018
Land/Område	Italien
By	Padova
Periode	25/06/2018 → 28/06/2018

Adgang til dokumentet

10.1109/COMPEL.2018.8459952

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http://www.scopus.com/inward/record.url?scp=85054519162&partnerID=8YFLogxK

Multi-Timescale Stability of Modular Cascaded Power Electronic Systems
Wang, X. & Wu, H.
01/05/2017 → 30/04/2020
Projekter: Projekt › Forskning

Citationsformater

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title = "AC Impedance Modeling of Modular Multilevel Converters and Two-Level Voltage-Source Converters: Similarities and Differences",

abstract = "This paper presents a small-signal model for modular multilevel converters (MMCs) by using the harmonic state space (HSS) method. The ac output impedance of the MMC is then derived and compared with that of the commonly used two-level voltage-source converters (TL-VSCs). It turns out that the low frequency ac impedance of the MMC differs from that of the TL-VSC, due to the influences of internal dynamics, especially for the open-loop control and the voltage-mode control. In contrast, for the current-mode control, this difference can be minimized by the current regulator with a high-gain in the low frequency range. Moreover, despite the used control schemes, the high frequency ac impedance of the MMC is similar to that of the TL-VSC. The time-domain simulations are provided to validate the effectiveness of the theoretical analysis.",

keywords = "modular multilevel converter, small-signal model, harmonic state space, impedance modeling",

author = "Heng Wu and Xiongfei Wang and Lukasz Kocewiak and Lennart Harnefors",

year = "2018",

month = sep,

day = "10",

doi = "10.1109/COMPEL.2018.8459952",

language = "English",

isbn = "978-1-5386-5542-9",

pages = "1--8",

booktitle = "Proceedings of the 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)",

publisher = "IEEE Press",

note = "19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 ; Conference date: 25-06-2018 Through 28-06-2018",

}

Wu, H , Wang, X, Kocewiak, L & Harnefors, L 2018, AC Impedance Modeling of Modular Multilevel Converters and Two-Level Voltage-Source Converters: Similarities and Differences. i Proceedings of the 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)., 8459952, IEEE Press, s. 1-8, 19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018, Padova, Italien, 25/06/2018. https://doi.org/10.1109/COMPEL.2018.8459952

AC Impedance Modeling of Modular Multilevel Converters and Two-Level Voltage-Source Converters: Similarities and Differences. / Wu, Heng ; Wang, Xiongfei; Kocewiak, Lukasz et al.
Proceedings of the 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL). IEEE Press, 2018. s. 1-8 8459952.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

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AU - Wu, Heng

AU - Wang, Xiongfei

AU - Kocewiak, Lukasz

AU - Harnefors, Lennart

PY - 2018/9/10

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N2 - This paper presents a small-signal model for modular multilevel converters (MMCs) by using the harmonic state space (HSS) method. The ac output impedance of the MMC is then derived and compared with that of the commonly used two-level voltage-source converters (TL-VSCs). It turns out that the low frequency ac impedance of the MMC differs from that of the TL-VSC, due to the influences of internal dynamics, especially for the open-loop control and the voltage-mode control. In contrast, for the current-mode control, this difference can be minimized by the current regulator with a high-gain in the low frequency range. Moreover, despite the used control schemes, the high frequency ac impedance of the MMC is similar to that of the TL-VSC. The time-domain simulations are provided to validate the effectiveness of the theoretical analysis.

AB - This paper presents a small-signal model for modular multilevel converters (MMCs) by using the harmonic state space (HSS) method. The ac output impedance of the MMC is then derived and compared with that of the commonly used two-level voltage-source converters (TL-VSCs). It turns out that the low frequency ac impedance of the MMC differs from that of the TL-VSC, due to the influences of internal dynamics, especially for the open-loop control and the voltage-mode control. In contrast, for the current-mode control, this difference can be minimized by the current regulator with a high-gain in the low frequency range. Moreover, despite the used control schemes, the high frequency ac impedance of the MMC is similar to that of the TL-VSC. The time-domain simulations are provided to validate the effectiveness of the theoretical analysis.

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AC Impedance Modeling of Modular Multilevel Converters and Two-Level Voltage-Source Converters: Similarities and Differences

Abstract

Konference

Adgang til dokumentet

AUB Link

Andre filer og links

Fingeraftryk

Projekter

Multi-Timescale Stability of Modular Cascaded Power Electronic Systems

Citationsformater