Hybrid modulation strategies for eliminating low-frequency neutral-point voltage oscillations in the neutral-point-clamped converter
Hybrid modulation strategies for eliminating low-frequency neutral-point voltage oscillations in the neutral-point-clamped converter
Nearest vector (NV) modulation strategies for the neutral-point-clamped converter are known to generate low-frequency neutral point (NP) voltage oscillations. Non-NV strategies can eliminate these oscillations, but at the expense of higher switching losses and output voltage harmonic distortion. This letter proposes a simple way of creating hybrid strategies, as combinations of NV and non-NV strategies, which are also able to eliminate NP voltage oscillations. The approach minimizes the participation of non-NV strategies and hence their drawbacks, while it can be applied to any type of load (nonlinear and/or unbalanced). Simulations in MATLAB-Simulink are used to illustrate its operation.
capacitor balancing, hybrid modulation strategies, neutral point (np) voltage ripple, neutral-point-clamped (npc) converter
3653-3658
Orfanoudakis, G. I.
9451bcbc-fbff-44fc-acda-46c0fdb57382
Yuratich, M. A.
6107fcaa-e1a8-4afd-b06e-0e3dadf42d3c
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
August 2013
Orfanoudakis, G. I.
9451bcbc-fbff-44fc-acda-46c0fdb57382
Yuratich, M. A.
6107fcaa-e1a8-4afd-b06e-0e3dadf42d3c
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Orfanoudakis, G. I., Yuratich, M. A. and Sharkh, S.M.
(2013)
Hybrid modulation strategies for eliminating low-frequency neutral-point voltage oscillations in the neutral-point-clamped converter.
IEEE Transactions on Power Electronics, 28 (8), .
(doi:10.1109/TPEL.2012.2231883).
Abstract
Nearest vector (NV) modulation strategies for the neutral-point-clamped converter are known to generate low-frequency neutral point (NP) voltage oscillations. Non-NV strategies can eliminate these oscillations, but at the expense of higher switching losses and output voltage harmonic distortion. This letter proposes a simple way of creating hybrid strategies, as combinations of NV and non-NV strategies, which are also able to eliminate NP voltage oscillations. The approach minimizes the participation of non-NV strategies and hence their drawbacks, while it can be applied to any type of load (nonlinear and/or unbalanced). Simulations in MATLAB-Simulink are used to illustrate its operation.
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2013 - Orafnoudakis, Yuratich and Sharkh - IEEE TPE Letter - Hybrid Strategies.pdf
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e-pub ahead of print date: 18 January 2013
Published date: August 2013
Keywords:
capacitor balancing, hybrid modulation strategies, neutral point (np) voltage ripple, neutral-point-clamped (npc) converter
Organisations:
Mechatronics
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Local EPrints ID: 350824
URI: http://eprints.soton.ac.uk/id/eprint/350824
ISSN: 0885-8993
PURE UUID: fd49e3f3-67e6-4fdc-8cb0-3e353f08b7cb
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Date deposited: 08 Apr 2013 15:23
Last modified: 15 Mar 2024 02:48
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Author:
G. I. Orfanoudakis
Author:
M. A. Yuratich
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