Evaluation of the low-frequency neutral-point voltage oscillations in the three-level inverter

Josep Pou; Rafael Pindado; Dushan Boroyevich; Pedro Rodríguez

doi:10.1109/TIE.2005.858723

Evaluation of the low-frequency neutral-point voltage oscillations in the three-level inverter

Josep Pou, Rafael Pindado, Dushan Boroyevich, Pedro Rodríguez

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

314 Citations (Scopus)

Abstract

The nearest vectors to the reference vector are commonly used in space-vector modulation (SVM) strategies. The main advantages of these modulation strategies are the low switching frequencies of the devices, the good output voltage spectra, and the low electromagnetic interference. However, when these techniques are applied to the three-level neutral-point (NP)-clamped inverter, low-frequency oscillations appear in the NP voltage for some operating conditions. As a result, the value of the dc-link capacitors must be increased in order to attenuate such oscillations. In this paper, these amplitudes are quantified for two modulation strategies that use nearest vectors to the reference vector. Owing to the nondimensional variables used in the analysis, the information provided will help for the calculation of the dc-link capacitors in a given specific application. Simulated and experimental examples are presented. © 2005 IEEE.

Original language	English
Pages (from-to)	1582-1588
Journal	IEEE Transactions on Industrial Electronics
Volume	52
Issue number	6
DOIs	https://doi.org/10.1109/TIE.2005.858723
Publication status	Published - Dec 2005
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

Manuscript received January 10, 2004; revised August 23, 2005. Abstract published on the Internet September 26, 2005. This work was supported by the Departament d’Universitats, Recerca i Societat de la Informació of the Generalitat de Catalunya under Grant 2000BEAI200225, and by the Ministerio de Ciencia y Tecnologia of Spain under Project DPI2001-2213. This work made use of ERC Shared Facilities supported by the National Science Foundation under Award EEC-9731677.

Research Keywords

DC-link capacitors
Low-frequency oscillation
Nearest vectors
Neutral-point balance
Three-level inverter

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title = "Evaluation of the low-frequency neutral-point voltage oscillations in the three-level inverter",

abstract = "The nearest vectors to the reference vector are commonly used in space-vector modulation (SVM) strategies. The main advantages of these modulation strategies are the low switching frequencies of the devices, the good output voltage spectra, and the low electromagnetic interference. However, when these techniques are applied to the three-level neutral-point (NP)-clamped inverter, low-frequency oscillations appear in the NP voltage for some operating conditions. As a result, the value of the dc-link capacitors must be increased in order to attenuate such oscillations. In this paper, these amplitudes are quantified for two modulation strategies that use nearest vectors to the reference vector. Owing to the nondimensional variables used in the analysis, the information provided will help for the calculation of the dc-link capacitors in a given specific application. Simulated and experimental examples are presented. {\textcopyright} 2005 IEEE.",

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AU - Pou, Josep

AU - Pindado, Rafael

AU - Boroyevich, Dushan

AU - Rodríguez, Pedro

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2005/12

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N2 - The nearest vectors to the reference vector are commonly used in space-vector modulation (SVM) strategies. The main advantages of these modulation strategies are the low switching frequencies of the devices, the good output voltage spectra, and the low electromagnetic interference. However, when these techniques are applied to the three-level neutral-point (NP)-clamped inverter, low-frequency oscillations appear in the NP voltage for some operating conditions. As a result, the value of the dc-link capacitors must be increased in order to attenuate such oscillations. In this paper, these amplitudes are quantified for two modulation strategies that use nearest vectors to the reference vector. Owing to the nondimensional variables used in the analysis, the information provided will help for the calculation of the dc-link capacitors in a given specific application. Simulated and experimental examples are presented. © 2005 IEEE.

AB - The nearest vectors to the reference vector are commonly used in space-vector modulation (SVM) strategies. The main advantages of these modulation strategies are the low switching frequencies of the devices, the good output voltage spectra, and the low electromagnetic interference. However, when these techniques are applied to the three-level neutral-point (NP)-clamped inverter, low-frequency oscillations appear in the NP voltage for some operating conditions. As a result, the value of the dc-link capacitors must be increased in order to attenuate such oscillations. In this paper, these amplitudes are quantified for two modulation strategies that use nearest vectors to the reference vector. Owing to the nondimensional variables used in the analysis, the information provided will help for the calculation of the dc-link capacitors in a given specific application. Simulated and experimental examples are presented. © 2005 IEEE.

KW - DC-link capacitors

KW - Low-frequency oscillation

KW - Nearest vectors

KW - Neutral-point balance

KW - Three-level inverter

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JO - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

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Evaluation of the low-frequency neutral-point voltage oscillations in the three-level inverter

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Research Keywords

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