On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters

Alon Kuperman

doi:10.1109/INES56734.2022.9922614

On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters

Alon Kuperman

School of Electrical and Computer Engineering

Ben-Gurion University of the Negev

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

Abstract

It is known that attainable DC link voltage loop bandwidth in grid-connected converters is limited due to trade-off with AC-side current total harmonic distortion (THD). The letter reveals that THD requirement inflicts the value of DC link voltage controller gain only at double-grid frequency. On the other hand, the desired phase margin poses another restriction on the controller performance. As a result, if a typical PI compensator is employed, two abovementioned performance merits impose DC link voltage loop dynamics. The letter concludes that dynamic performance may be improved without deteriorating grid-side current quality by adding a degree-of-freedom to compensator structure so that the loop gain magnitude at double-grid frequency and the crossover frequency are decoupled. Experimental results validate the revealed findings.

Original language	English
Title of host publication	INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings
Pages	69-72
Number of pages	4
ISBN (Electronic)	9781665492096
DOIs	https://doi.org/10.1109/INES56734.2022.9922614
State	Published - 1 Jan 2022
Event	26th IEEE International Conference on Intelligent Engineering Systems, INES 2022 - Crete, Greece Duration: 12 Aug 2022 → 15 Aug 2022

Publication series

Name	INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings

Conference

Conference	26th IEEE International Conference on Intelligent Engineering Systems, INES 2022
Country/Territory	Greece
City	Crete
Period	12/08/22 → 15/08/22

Keywords

Grid-connected converters
THD
loop gain

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering
Artificial Intelligence
Computer Science Applications
Biomedical Engineering

Access to Document

10.1109/INES56734.2022.9922614

Cite this

Kuperman, A. (2022). On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters. In INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings (pp. 69-72). (INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings). https://doi.org/10.1109/INES56734.2022.9922614

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abstract = "It is known that attainable DC link voltage loop bandwidth in grid-connected converters is limited due to trade-off with AC-side current total harmonic distortion (THD). The letter reveals that THD requirement inflicts the value of DC link voltage controller gain only at double-grid frequency. On the other hand, the desired phase margin poses another restriction on the controller performance. As a result, if a typical PI compensator is employed, two abovementioned performance merits impose DC link voltage loop dynamics. The letter concludes that dynamic performance may be improved without deteriorating grid-side current quality by adding a degree-of-freedom to compensator structure so that the loop gain magnitude at double-grid frequency and the crossover frequency are decoupled. Experimental results validate the revealed findings.",

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Kuperman, A 2022, On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters. in INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings. INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings, pp. 69-72, 26th IEEE International Conference on Intelligent Engineering Systems, INES 2022, Crete, Greece, 12/08/22. https://doi.org/10.1109/INES56734.2022.9922614

On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters. / Kuperman, Alon.
INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings. 2022. p. 69-72 (INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings).

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

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N2 - It is known that attainable DC link voltage loop bandwidth in grid-connected converters is limited due to trade-off with AC-side current total harmonic distortion (THD). The letter reveals that THD requirement inflicts the value of DC link voltage controller gain only at double-grid frequency. On the other hand, the desired phase margin poses another restriction on the controller performance. As a result, if a typical PI compensator is employed, two abovementioned performance merits impose DC link voltage loop dynamics. The letter concludes that dynamic performance may be improved without deteriorating grid-side current quality by adding a degree-of-freedom to compensator structure so that the loop gain magnitude at double-grid frequency and the crossover frequency are decoupled. Experimental results validate the revealed findings.

AB - It is known that attainable DC link voltage loop bandwidth in grid-connected converters is limited due to trade-off with AC-side current total harmonic distortion (THD). The letter reveals that THD requirement inflicts the value of DC link voltage controller gain only at double-grid frequency. On the other hand, the desired phase margin poses another restriction on the controller performance. As a result, if a typical PI compensator is employed, two abovementioned performance merits impose DC link voltage loop dynamics. The letter concludes that dynamic performance may be improved without deteriorating grid-side current quality by adding a degree-of-freedom to compensator structure so that the loop gain magnitude at double-grid frequency and the crossover frequency are decoupled. Experimental results validate the revealed findings.

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KW - loop gain

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Kuperman A. On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters. In INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings. 2022. p. 69-72. (INES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings). doi: 10.1109/INES56734.2022.9922614

On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters

Abstract

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Keywords

ASJC Scopus subject areas

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