Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics

The small-signal impedance modeling of a modular multilevel converter (MMC) is the key for analyzing resonance and stability of MMC-based power electronic systems. The MMC is a power converter with a multifrequency response due to its significant steady-state harmonic components in the arm currents...

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Main Authors: Lyu, Jing, Zhang, Xin, Cai, Xu, Molinas, Marta
其他作者: School of Electrical and Electronic Engineering
格式: Article
語言:English
出版: 2020
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在線閱讀:https://hdl.handle.net/10356/141692
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機構: Nanyang Technological University
語言: English
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spelling sg-ntu-dr.10356-1416922020-06-10T03:18:24Z Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics Lyu, Jing Zhang, Xin Cai, Xu Molinas, Marta School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Harmonic State-space (HSS) Impedance The small-signal impedance modeling of a modular multilevel converter (MMC) is the key for analyzing resonance and stability of MMC-based power electronic systems. The MMC is a power converter with a multifrequency response due to its significant steady-state harmonic components in the arm currents and capacitor voltages. These internal harmonic dynamics may have great influence on the terminal characteristics of the MMC, which, therefore, are essential to be considered in the MMC impedance modeling. In this paper, the harmonic state-space (HSS) modeling approach is first introduced to characterize the multiharmonic coupling behavior of the MMC. On this basis, the small-signal impedance models of the MMC are then developed based on the proposed HSS model of the MMC, which are able to include all the internal harmonics within the MMC, leading to accurate impedance models. Besides, different control schemes for the MMC, such as open-loop control, ac voltage closed-loop control, and circulating current closed-loop control, have also been considered during the modeling process, which further reveals the impact of the MMC internal dynamics and control dynamics on the MMC impedance. Furthermore, an impedance-based stability analysis of the MMC-high-voltage direct current connected wind farm has been carried out to show how the HSS-based MMC impedance model can be used in practical system analysis. Finally, the proposed impedance models are validated by both simulation and experimental measurements. 2020-06-10T03:18:24Z 2020-06-10T03:18:24Z 2018 Journal Article Lyu, J., Zhang, X., Cai, X., & Molinas, M. (2019). Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics. IEEE Transactions on Power Electronics, 34(3), 2134-2148. doi:10.1109/TPEL.2018.2842682 0885-8993 https://hdl.handle.net/10356/141692 10.1109/TPEL.2018.2842682 2-s2.0-85047820529 3 34 2134 2148 en IEEE Transactions on Power Electronics © 2018 IEEE. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Harmonic State-space (HSS)
Impedance
spellingShingle Engineering::Electrical and electronic engineering
Harmonic State-space (HSS)
Impedance
Lyu, Jing
Zhang, Xin
Cai, Xu
Molinas, Marta
Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
description The small-signal impedance modeling of a modular multilevel converter (MMC) is the key for analyzing resonance and stability of MMC-based power electronic systems. The MMC is a power converter with a multifrequency response due to its significant steady-state harmonic components in the arm currents and capacitor voltages. These internal harmonic dynamics may have great influence on the terminal characteristics of the MMC, which, therefore, are essential to be considered in the MMC impedance modeling. In this paper, the harmonic state-space (HSS) modeling approach is first introduced to characterize the multiharmonic coupling behavior of the MMC. On this basis, the small-signal impedance models of the MMC are then developed based on the proposed HSS model of the MMC, which are able to include all the internal harmonics within the MMC, leading to accurate impedance models. Besides, different control schemes for the MMC, such as open-loop control, ac voltage closed-loop control, and circulating current closed-loop control, have also been considered during the modeling process, which further reveals the impact of the MMC internal dynamics and control dynamics on the MMC impedance. Furthermore, an impedance-based stability analysis of the MMC-high-voltage direct current connected wind farm has been carried out to show how the HSS-based MMC impedance model can be used in practical system analysis. Finally, the proposed impedance models are validated by both simulation and experimental measurements.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Lyu, Jing
Zhang, Xin
Cai, Xu
Molinas, Marta
format Article
author Lyu, Jing
Zhang, Xin
Cai, Xu
Molinas, Marta
author_sort Lyu, Jing
title Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
title_short Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
title_full Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
title_fullStr Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
title_full_unstemmed Harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
title_sort harmonic state-space based small-signal impedance modeling of a modular multilevel converter with consideration of internal harmonic dynamics
publishDate 2020
url https://hdl.handle.net/10356/141692
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