Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors

Ram Krishan Maheshwari; Stig Munk-Nielsen; Sergio  Busquets-Monge

doi:10.1109/ECCE.2011.6064044

Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors

Ram Krishan Maheshwari, Stig Munk-Nielsen, Sergio Busquets-Monge

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

18 Citations (Scopus)

Abstract

A Neutral-Point-Clamped (NPC) three-level inverter with small DC-link capacitors is presented in this paper. This inverter requires zero average neutral-point current for stable neutral-point potential. A simple carrier based modulation strategy is proposed for achieving zero average neutral-point current. A new simplified model of the neutral-point voltage dynamics is derived for the proposed modulation strategy. This model shows that the neutral-point current is proportional to the power drawn from the converter and it enables the use of well established classical control theory for neutral-point voltage controller design. A PI controller is used for neutral-point voltage balance. The
implementation of the proposed modulation strategy and controller is simple. It does not require any information about the output phase currents. The controller is implemented in a 7.5 kW induction machine based drive with only 14 μF DC-link capacitors. A fast and stable performance of the neutral-point voltage controller is achieved and verified by experiments.

Original language	English
Title of host publication	Proceedings of the 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011)
Number of pages	8
Publisher	IEEE Press
Publication date	2011
Pages	2087-2094
ISBN (Print)	978-1-4577-0542-7
DOIs	https://doi.org/10.1109/ECCE.2011.6064044
Publication status	Published - 2011
Event	3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011) - Phoenix, Arizona, United States Duration: 17 Sept 2011 → 22 Sept 2011

Conference

Conference	3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011)
Country/Territory	United States
City	Phoenix, Arizona
Period	17/09/2011 → 22/09/2011

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http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6064044

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@inproceedings{a7f773b3c46141c49763ed1150a410bd,

title = "Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors",

abstract = "A Neutral-Point-Clamped (NPC) three-level inverter with small DC-link capacitors is presented in this paper. This inverter requires zero average neutral-point current for stable neutral-point potential. A simple carrier based modulation strategy is proposed for achieving zero average neutral-point current. A new simplified model of the neutral-point voltage dynamics is derived for the proposed modulation strategy. This model shows that the neutral-point current is proportional to the power drawn from the converter and it enables the use of well established classical control theory for neutral-point voltage controller design. A PI controller is used for neutral-point voltage balance. Theimplementation of the proposed modulation strategy and controller is simple. It does not require any information about the output phase currents. The controller is implemented in a 7.5 kW induction machine based drive with only 14 μF DC-link capacitors. A fast and stable performance of the neutral-point voltage controller is achieved and verified by experiments.",

author = "Maheshwari, {Ram Krishan} and Stig Munk-Nielsen and Sergio Busquets-Monge",

year = "2011",

doi = "10.1109/ECCE.2011.6064044",

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pages = "2087--2094 ",

booktitle = "Proceedings of the 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011)",

publisher = "IEEE Press",

note = "3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011) ; Conference date: 17-09-2011 Through 22-09-2011",

}

Maheshwari, RK, Munk-Nielsen, S & Busquets-Monge, S 2011, Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors. in Proceedings of the 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011). IEEE Press, pp. 2087-2094 , 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011), Phoenix, Arizona, United States, 17/09/2011. https://doi.org/10.1109/ECCE.2011.6064044

Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors. / Maheshwari, Ram Krishan; Munk-Nielsen, Stig; Busquets-Monge, Sergio .
Proceedings of the 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011). IEEE Press, 2011. p. 2087-2094 .

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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N2 - A Neutral-Point-Clamped (NPC) three-level inverter with small DC-link capacitors is presented in this paper. This inverter requires zero average neutral-point current for stable neutral-point potential. A simple carrier based modulation strategy is proposed for achieving zero average neutral-point current. A new simplified model of the neutral-point voltage dynamics is derived for the proposed modulation strategy. This model shows that the neutral-point current is proportional to the power drawn from the converter and it enables the use of well established classical control theory for neutral-point voltage controller design. A PI controller is used for neutral-point voltage balance. Theimplementation of the proposed modulation strategy and controller is simple. It does not require any information about the output phase currents. The controller is implemented in a 7.5 kW induction machine based drive with only 14 μF DC-link capacitors. A fast and stable performance of the neutral-point voltage controller is achieved and verified by experiments.

AB - A Neutral-Point-Clamped (NPC) three-level inverter with small DC-link capacitors is presented in this paper. This inverter requires zero average neutral-point current for stable neutral-point potential. A simple carrier based modulation strategy is proposed for achieving zero average neutral-point current. A new simplified model of the neutral-point voltage dynamics is derived for the proposed modulation strategy. This model shows that the neutral-point current is proportional to the power drawn from the converter and it enables the use of well established classical control theory for neutral-point voltage controller design. A PI controller is used for neutral-point voltage balance. Theimplementation of the proposed modulation strategy and controller is simple. It does not require any information about the output phase currents. The controller is implemented in a 7.5 kW induction machine based drive with only 14 μF DC-link capacitors. A fast and stable performance of the neutral-point voltage controller is achieved and verified by experiments.

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BT - Proceedings of the 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011)

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T2 - 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011)

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ER -

Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors

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