A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept

Hoda Ghoreishy; Zhe Zhang; Ole Cornelius Thomsen; Michael A. E. Andersen

doi:10.1109/IPEMC.2012.6258848

A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept

Hoda Ghoreishy, Zhe Zhang, Ole Cornelius Thomsen, Michael A. E. Andersen

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

In this paper, a modulation strategy based on the circuit-level decoupling concept is proposed and investigated for the three-level four-leg neutral-point-clamped (NPC) inverter,with the aim of delivering power to all sorts of loads, linear/nonlinear and balanced/unbalanced. By applying the proposed modulation strategy, the four-leg NPC inverter can be decoupled into three three-level Buck converters in each defined operating section. This makes the controller design much simpler compared to the conventional four-leg NPC inverter controllers. Also, this technique can be implemented with a simple logic and can be processed very quickly. Moreover, the switching loss is reduced substantially and the dc-link capacitors’ voltages balance is also achieved without any feedback control. The proposed modulation technique is verified by the experiment.

Original language	English
Title of host publication	Proceedings of The International Power Electronics and Motion Control Conference (IPEMC)
Publisher	IEEE
Publication date	2012
Pages	274
Chapter	280
ISBN (Print)	978-1-4577-2087-1
DOIs	https://doi.org/10.1109/IPEMC.2012.6258848
Publication status	Published - 2012
Event	The International Power Electronics and Motion Control Conference - Harbin, China Duration: 2 Jun 2012 → 5 Jun 2012

Conference

Conference	The International Power Electronics and Motion Control Conference
Country/Territory	China
City	Harbin
Period	02/06/2012 → 05/06/2012

Keywords

Circuit-level decoupling
Inverter
Neutral-pointclamped
PWM modulation
Three-level
Capacitors
Phase modulation
Voltage Control

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title = "A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept",

abstract = "In this paper, a modulation strategy based on the circuit-level decoupling concept is proposed and investigated for the three-level four-leg neutral-point-clamped (NPC) inverter,with the aim of delivering power to all sorts of loads, linear/nonlinear and balanced/unbalanced. By applying the proposed modulation strategy, the four-leg NPC inverter can be decoupled into three three-level Buck converters in each defined operating section. This makes the controller design much simpler compared to the conventional four-leg NPC inverter controllers. Also, this technique can be implemented with a simple logic and can be processed very quickly. Moreover, the switching loss is reduced substantially and the dc-link capacitors{\textquoteright} voltages balance is also achieved without any feedback control. The proposed modulation technique is verified by the experiment.",

keywords = "Circuit-level decoupling, Inverter, Neutral-pointclamped, PWM modulation, Three-level, Capacitors, Phase modulation, Voltage Control",

author = "Hoda Ghoreishy and Zhe Zhang and Thomsen, {Ole Cornelius} and Andersen, {Michael A. E.}",

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booktitle = "Proceedings of The International Power Electronics and Motion Control Conference (IPEMC)",

publisher = "IEEE",

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note = "The International Power Electronics and Motion Control Conference , IPEMC 2012-ECCE Asia ; Conference date: 02-06-2012 Through 05-06-2012",

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Ghoreishy, H, Zhang, Z, Thomsen, OC & Andersen, MAE 2012, A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept. in Proceedings of The International Power Electronics and Motion Control Conference (IPEMC). IEEE, pp. 274, The International Power Electronics and Motion Control Conference , Harbin, China, 02/06/2012. https://doi.org/10.1109/IPEMC.2012.6258848

A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept. / Ghoreishy, Hoda; Zhang, Zhe; Thomsen, Ole Cornelius et al.
Proceedings of The International Power Electronics and Motion Control Conference (IPEMC). IEEE, 2012. p. 274.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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AB - In this paper, a modulation strategy based on the circuit-level decoupling concept is proposed and investigated for the three-level four-leg neutral-point-clamped (NPC) inverter,with the aim of delivering power to all sorts of loads, linear/nonlinear and balanced/unbalanced. By applying the proposed modulation strategy, the four-leg NPC inverter can be decoupled into three three-level Buck converters in each defined operating section. This makes the controller design much simpler compared to the conventional four-leg NPC inverter controllers. Also, this technique can be implemented with a simple logic and can be processed very quickly. Moreover, the switching loss is reduced substantially and the dc-link capacitors’ voltages balance is also achieved without any feedback control. The proposed modulation technique is verified by the experiment.

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ER -

A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept

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Keywords

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