Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters

Neha Beniwal; Glen G. Farivar; Hossein Dehghani Tafti; Josep Pou; Salvador Ceballos; Georgios Konstantinou; Christopher D. Townsend

doi:10.1109/ECCE-Asia49820.2021.9479072

Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters

Neha Beniwal, Glen G. Farivar, Hossein Dehghani Tafti, Josep Pou, Salvador Ceballos, Georgios Konstantinou, Christopher D. Townsend

Nanyang Technological University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A control strategy for regulating the average neutral point (NP) current in neutral-point-clamped (NPC) converters is proposed in this paper. Previously presented strategies in the literature control the instantaneous NP current. However, the instantaneous maximum NP current profile is time-varying, which results in difficulties to regulate the average NP current linearly. The proposed strategy in this paper overcomes this drawback by directly controlling the average NP current. Furthermore, it can compensate nonzero average NP currents produced by unbalanced dc loads connected to the converter. In this strategy, the required nonzero average NP current reference is compensated by switching one or two phases between the negative and positive dc-rails for a calculated time interval. The proposed strategy also provides the range for stable operation of the NPC converter by formulating the maximum average current which can be injected into the NP. The effectiveness of the proposed control strategy is validated by performing simulation tests in MATLAB/Simulink environment under variable dc-loading conditions.

Original language	English
Title of host publication	Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1250-1255
Number of pages	6
ISBN (Electronic)	9781728163444
DOIs	https://doi.org/10.1109/ECCE-Asia49820.2021.9479072
Publication status	Published - May 24 2021
Externally published	Yes
Event	12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021 - Virtual, Singapore, Singapore Duration: May 24 2021 → May 27 2021

Publication series

Name	Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021

Conference

Conference	12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Country/Territory	Singapore
City	Virtual, Singapore
Period	5/24/21 → 5/27/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

ASJC Scopus Subject Areas

Control and Optimization
Energy Engineering and Power Technology
Electrical and Electronic Engineering
Mechanical Engineering

Keywords

Neutral-point-clamped converter
pulsewidth modulation
three-level modulation
two-level modulation

Access to Document

10.1109/ECCE-Asia49820.2021.9479072

Cite this

Beniwal, N., Farivar, G. G., Dehghani Tafti, H., Pou, J., Ceballos, S., Konstantinou, G., & Townsend, C. D. (2021). Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters. In Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021 (pp. 1250-1255). Article 9479072 (Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE-Asia49820.2021.9479072

Beniwal, Neha ; Farivar, Glen G. ; Dehghani Tafti, Hossein et al. / Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters. Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021. Institute of Electrical and Electronics Engineers Inc., 2021. pp. 1250-1255 (Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021).

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title = "Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters",

abstract = "A control strategy for regulating the average neutral point (NP) current in neutral-point-clamped (NPC) converters is proposed in this paper. Previously presented strategies in the literature control the instantaneous NP current. However, the instantaneous maximum NP current profile is time-varying, which results in difficulties to regulate the average NP current linearly. The proposed strategy in this paper overcomes this drawback by directly controlling the average NP current. Furthermore, it can compensate nonzero average NP currents produced by unbalanced dc loads connected to the converter. In this strategy, the required nonzero average NP current reference is compensated by switching one or two phases between the negative and positive dc-rails for a calculated time interval. The proposed strategy also provides the range for stable operation of the NPC converter by formulating the maximum average current which can be injected into the NP. The effectiveness of the proposed control strategy is validated by performing simulation tests in MATLAB/Simulink environment under variable dc-loading conditions.",

keywords = "Neutral-point-clamped converter, pulsewidth modulation, three-level modulation, two-level modulation",

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Beniwal, N, Farivar, GG, Dehghani Tafti, H, Pou, J, Ceballos, S, Konstantinou, G & Townsend, CD 2021, Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters. in Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021., 9479072, Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021, Institute of Electrical and Electronics Engineers Inc., pp. 1250-1255, 12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021, Virtual, Singapore, Singapore, 5/24/21. https://doi.org/10.1109/ECCE-Asia49820.2021.9479072

Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters. / Beniwal, Neha; Farivar, Glen G.; Dehghani Tafti, Hossein et al.
Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021. Institute of Electrical and Electronics Engineers Inc., 2021. p. 1250-1255 9479072 (Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Beniwal, Neha

AU - Farivar, Glen G.

AU - Dehghani Tafti, Hossein

AU - Pou, Josep

AU - Ceballos, Salvador

AU - Konstantinou, Georgios

AU - Townsend, Christopher D.

PY - 2021/5/24

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N2 - A control strategy for regulating the average neutral point (NP) current in neutral-point-clamped (NPC) converters is proposed in this paper. Previously presented strategies in the literature control the instantaneous NP current. However, the instantaneous maximum NP current profile is time-varying, which results in difficulties to regulate the average NP current linearly. The proposed strategy in this paper overcomes this drawback by directly controlling the average NP current. Furthermore, it can compensate nonzero average NP currents produced by unbalanced dc loads connected to the converter. In this strategy, the required nonzero average NP current reference is compensated by switching one or two phases between the negative and positive dc-rails for a calculated time interval. The proposed strategy also provides the range for stable operation of the NPC converter by formulating the maximum average current which can be injected into the NP. The effectiveness of the proposed control strategy is validated by performing simulation tests in MATLAB/Simulink environment under variable dc-loading conditions.

AB - A control strategy for regulating the average neutral point (NP) current in neutral-point-clamped (NPC) converters is proposed in this paper. Previously presented strategies in the literature control the instantaneous NP current. However, the instantaneous maximum NP current profile is time-varying, which results in difficulties to regulate the average NP current linearly. The proposed strategy in this paper overcomes this drawback by directly controlling the average NP current. Furthermore, it can compensate nonzero average NP currents produced by unbalanced dc loads connected to the converter. In this strategy, the required nonzero average NP current reference is compensated by switching one or two phases between the negative and positive dc-rails for a calculated time interval. The proposed strategy also provides the range for stable operation of the NPC converter by formulating the maximum average current which can be injected into the NP. The effectiveness of the proposed control strategy is validated by performing simulation tests in MATLAB/Simulink environment under variable dc-loading conditions.

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Beniwal N, Farivar GG, Dehghani Tafti H, Pou J, Ceballos S, Konstantinou G et al. Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters. In Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021. Institute of Electrical and Electronics Engineers Inc. 2021. p. 1250-1255. 9479072. (Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021). doi: 10.1109/ECCE-Asia49820.2021.9479072

Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus Subject Areas

Keywords

Access to Document

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