Discontinuous modulation of a cascaded H-bridge low-capacitance statcom

This paper presents a discontinuous modulation (DM) strategy for static compensators (StatComs) based on a cascaded H-bridge (CHB) converter with star configuration. The proposed DM strategy considers the capacitor voltage oscillations at twice the fundamental frequency and the effect of zero-sequen...

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Main Authors: Liu, Qingxiang, Rodriguez, Ezequiel, Farivar, Glen G., Ceballos, Salvador, Townsend, Christopher D., Leyva, Ramon, Pou, Josep
Other Authors: Interdisciplinary Graduate School (IGS)
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/152891
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1528912021-12-11T20:11:28Z Discontinuous modulation of a cascaded H-bridge low-capacitance statcom Liu, Qingxiang Rodriguez, Ezequiel Farivar, Glen G. Ceballos, Salvador Townsend, Christopher D. Leyva, Ramon Pou, Josep Interdisciplinary Graduate School (IGS) School of Electrical and Electronic Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Electrical and electronic engineering::Power electronics Static Compensator Discontinuous Modulation This paper presents a discontinuous modulation (DM) strategy for static compensators (StatComs) based on a cascaded H-bridge (CHB) converter with star configuration. The proposed DM strategy considers the capacitor voltage oscillations at twice the fundamental frequency and the effect of zero-sequence voltage injection on the capacitor voltages. Considering these effects is especially important in CHB-StatComs with large capacitor voltage ripples (low capacitance StatComs), where the assumption of a constant dc-link voltage, which is the basis of conventional DM strategies, does not apply. The paper also describes a coherent set of steady-state waveforms for CHB-StatComs under DM. In addition to the well-known benefit of reducing the switching losses, the proposed DM also reduces the dc-link capacitors size and extends the operating range. The viability of the proposed DM strategy is verified experimentally on a small-scale prototype. In addition, simulation results are obtained using a real-scale system to study feasibility of the DM under unbalanced conditions. Accepted version This work was supported by the Office of Naval Research Global under Grant N62909-19-1-2081. 2021-12-09T08:44:01Z 2021-12-09T08:44:01Z 2021 Journal Article Liu, Q., Rodriguez, E., Farivar, G. G., Ceballos, S., Townsend, C. D., Leyva, R. & Pou, J. (2021). Discontinuous modulation of a cascaded H-bridge low-capacitance statcom. IEEE Transactions On Power Electronics, 37(3), 2790-2800. https://dx.doi.org/10.1109/TPEL.2021.3114976 0885-8993 https://hdl.handle.net/10356/152891 10.1109/TPEL.2021.3114976 3 37 2790 2800 en IEEE Transactions on Power Electronics © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/TPEL.2021.3114976. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering::Power electronics
Static Compensator
Discontinuous Modulation
spellingShingle Engineering::Electrical and electronic engineering::Power electronics
Static Compensator
Discontinuous Modulation
Liu, Qingxiang
Rodriguez, Ezequiel
Farivar, Glen G.
Ceballos, Salvador
Townsend, Christopher D.
Leyva, Ramon
Pou, Josep
Discontinuous modulation of a cascaded H-bridge low-capacitance statcom
description This paper presents a discontinuous modulation (DM) strategy for static compensators (StatComs) based on a cascaded H-bridge (CHB) converter with star configuration. The proposed DM strategy considers the capacitor voltage oscillations at twice the fundamental frequency and the effect of zero-sequence voltage injection on the capacitor voltages. Considering these effects is especially important in CHB-StatComs with large capacitor voltage ripples (low capacitance StatComs), where the assumption of a constant dc-link voltage, which is the basis of conventional DM strategies, does not apply. The paper also describes a coherent set of steady-state waveforms for CHB-StatComs under DM. In addition to the well-known benefit of reducing the switching losses, the proposed DM also reduces the dc-link capacitors size and extends the operating range. The viability of the proposed DM strategy is verified experimentally on a small-scale prototype. In addition, simulation results are obtained using a real-scale system to study feasibility of the DM under unbalanced conditions.
author2 Interdisciplinary Graduate School (IGS)
author_facet Interdisciplinary Graduate School (IGS)
Liu, Qingxiang
Rodriguez, Ezequiel
Farivar, Glen G.
Ceballos, Salvador
Townsend, Christopher D.
Leyva, Ramon
Pou, Josep
format Article
author Liu, Qingxiang
Rodriguez, Ezequiel
Farivar, Glen G.
Ceballos, Salvador
Townsend, Christopher D.
Leyva, Ramon
Pou, Josep
author_sort Liu, Qingxiang
title Discontinuous modulation of a cascaded H-bridge low-capacitance statcom
title_short Discontinuous modulation of a cascaded H-bridge low-capacitance statcom
title_full Discontinuous modulation of a cascaded H-bridge low-capacitance statcom
title_fullStr Discontinuous modulation of a cascaded H-bridge low-capacitance statcom
title_full_unstemmed Discontinuous modulation of a cascaded H-bridge low-capacitance statcom
title_sort discontinuous modulation of a cascaded h-bridge low-capacitance statcom
publishDate 2021
url https://hdl.handle.net/10356/152891
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