The Circuit-Level Decoupling Modulation Strategy for Three-Level Neutral-Point-Clamped (TL-NPC) Inverter

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

The Circuit-Level Decoupling Modulation Strategy for Three-Level Neutral-Point-Clamped (TL-NPC) Inverter

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

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

Abstract

In this paper, a circuit-level decoupling modulation strategy is proposed for the three-level (TL) neutral-point-clamped (NPC) inverters. With the proposed modulation scheme, the TL-NPC inverter can be decoupled into two three-level Buck converters in each defined operating section, which makes the controller design much simpler. The decoupling principle including the driving signal synthesis and the neutral point potential variation are analyzed detailed. It is found that switching losses can be reduced by one third and the voltage balance between the dividing dc link capacitors can be achieved without any feedback control. The simulation results show the validity of theoretical analysis.

Original language	English
Title of host publication	14. European Conference on Power Electronics and Applications
Publication date	2011
ISBN (Print)	9789075815153
Publication status	Published - 2011
Event	14^thEuropean Conference on Power Electronics and Applications - Birmingham, United Kingdom Duration: 30 Aug 2011 → 1 Sept 2011 Conference number: 14

Conference

Conference	14^thEuropean Conference on Power Electronics and Applications
Number	14
Country/Territory	United Kingdom
City	Birmingham
Period	30/08/2011 → 01/09/2011

Keywords

Voltage Source Inverters (VSI)
Multilevel converters
Modulation strategy

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@inproceedings{f5ae01a4e46e4b9da48b187d111acd98,

title = "The Circuit-Level Decoupling Modulation Strategy for Three-Level Neutral-Point-Clamped (TL-NPC) Inverter",

abstract = "In this paper, a circuit-level decoupling modulation strategy is proposed for the three-level (TL) neutral-point-clamped (NPC) inverters. With the proposed modulation scheme, the TL-NPC inverter can be decoupled into two three-level Buck converters in each defined operating section, which makes the controller design much simpler. The decoupling principle including the driving signal synthesis and the neutral point potential variation are analyzed detailed. It is found that switching losses can be reduced by one third and the voltage balance between the dividing dc link capacitors can be achieved without any feedback control. The simulation results show the validity of theoretical analysis.",

keywords = "Voltage Source Inverters (VSI), Multilevel converters, Modulation strategy",

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

year = "2011",

language = "English",

isbn = "9789075815153",

booktitle = "14. European Conference on Power Electronics and Applications",

note = "14<sup>th </sup>European Conference on Power Electronics and Applications, EPE'11 ECCE Europe ; Conference date: 30-08-2011 Through 01-09-2011",

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TY - GEN

T1 - The Circuit-Level Decoupling Modulation Strategy for Three-Level Neutral-Point-Clamped (TL-NPC) Inverter

AU - Zhang, Zhe

AU - Thomsen, Ole Cornelius

AU - Andersen, Michael A. E.

N1 - Conference code: 14

PY - 2011

Y1 - 2011

N2 - In this paper, a circuit-level decoupling modulation strategy is proposed for the three-level (TL) neutral-point-clamped (NPC) inverters. With the proposed modulation scheme, the TL-NPC inverter can be decoupled into two three-level Buck converters in each defined operating section, which makes the controller design much simpler. The decoupling principle including the driving signal synthesis and the neutral point potential variation are analyzed detailed. It is found that switching losses can be reduced by one third and the voltage balance between the dividing dc link capacitors can be achieved without any feedback control. The simulation results show the validity of theoretical analysis.

AB - In this paper, a circuit-level decoupling modulation strategy is proposed for the three-level (TL) neutral-point-clamped (NPC) inverters. With the proposed modulation scheme, the TL-NPC inverter can be decoupled into two three-level Buck converters in each defined operating section, which makes the controller design much simpler. The decoupling principle including the driving signal synthesis and the neutral point potential variation are analyzed detailed. It is found that switching losses can be reduced by one third and the voltage balance between the dividing dc link capacitors can be achieved without any feedback control. The simulation results show the validity of theoretical analysis.

KW - Voltage Source Inverters (VSI)

KW - Multilevel converters

KW - Modulation strategy

M3 - Article in proceedings

SN - 9789075815153

BT - 14. European Conference on Power Electronics and Applications

T2 - 14<sup>th </sup>European Conference on Power Electronics and Applications

Y2 - 30 August 2011 through 1 September 2011

ER -

The Circuit-Level Decoupling Modulation Strategy for Three-Level Neutral-Point-Clamped (TL-NPC) Inverter

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