Decentralized reactive power sharing among parallel inverters through inherent dead-time effect

Yang Qi; Yi Tang

doi:10.1109/ECCE.2019.8913061

Decentralized reactive power sharing among parallel inverters through inherent dead-time effect

Yang Qi, Yi Tang

Nanyang Technological University

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

2 Scopus citations

Abstract

Load power sharing is an important aspect of the parallel-connected voltage source inverters (VSIs). It is widely accepted that the active power sharing accuracy is ensured by the conventional frequency droop control, whereas the reactive power sharing is poor because of mismatched grid impedances. To overcome this challenge, a novel control scheme is proposed in this paper, which utilizes the inherent dead-time effect to improve the reactive power sharing. As compared with most of the existing power-sharing approaches, the proposed control scheme can eliminate the reactive power sharing error in a completely decentralized manner. Moreover, the VSI output current quality can also be improved at the same time. Simulation and experimental results from a typical microgrid prototype are provided for verification.

Original language	English
Title of host publication	2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5393-5399
Number of pages	7
ISBN (Electronic)	9781728103952
DOIs	https://doi.org/10.1109/ECCE.2019.8913061
State	Published - Sep 2019
Externally published	Yes
Event	11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States Duration: 29 Sep 2019 → 3 Oct 2019

Publication series

Name	2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference	11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/Territory	United States
City	Baltimore
Period	29/09/19 → 3/10/19

Keywords

Dead-time effect.
Islanded microgrids
Parallel inverters
Reactive power sharing

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10.1109/ECCE.2019.8913061

Cite this

Qi, Y., & Tang, Y. (2019). Decentralized reactive power sharing among parallel inverters through inherent dead-time effect. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 5393-5399). Article 8913061 (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2019.8913061

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title = "Decentralized reactive power sharing among parallel inverters through inherent dead-time effect",

abstract = "Load power sharing is an important aspect of the parallel-connected voltage source inverters (VSIs). It is widely accepted that the active power sharing accuracy is ensured by the conventional frequency droop control, whereas the reactive power sharing is poor because of mismatched grid impedances. To overcome this challenge, a novel control scheme is proposed in this paper, which utilizes the inherent dead-time effect to improve the reactive power sharing. As compared with most of the existing power-sharing approaches, the proposed control scheme can eliminate the reactive power sharing error in a completely decentralized manner. Moreover, the VSI output current quality can also be improved at the same time. Simulation and experimental results from a typical microgrid prototype are provided for verification.",

keywords = "Dead-time effect., Islanded microgrids, Parallel inverters, Reactive power sharing",

author = "Yang Qi and Yi Tang",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 ; Conference date: 29-09-2019 Through 03-10-2019",

year = "2019",

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doi = "10.1109/ECCE.2019.8913061",

language = "英语",

series = "2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019",

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Qi, Y & Tang, Y 2019, Decentralized reactive power sharing among parallel inverters through inherent dead-time effect. in 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019., 8913061, 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019, Institute of Electrical and Electronics Engineers Inc., pp. 5393-5399, 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019, Baltimore, United States, 29/09/19. https://doi.org/10.1109/ECCE.2019.8913061

Decentralized reactive power sharing among parallel inverters through inherent dead-time effect. / Qi, Yang; Tang, Yi.
2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 5393-5399 8913061 (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019).

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

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AU - Qi, Yang

AU - Tang, Yi

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N2 - Load power sharing is an important aspect of the parallel-connected voltage source inverters (VSIs). It is widely accepted that the active power sharing accuracy is ensured by the conventional frequency droop control, whereas the reactive power sharing is poor because of mismatched grid impedances. To overcome this challenge, a novel control scheme is proposed in this paper, which utilizes the inherent dead-time effect to improve the reactive power sharing. As compared with most of the existing power-sharing approaches, the proposed control scheme can eliminate the reactive power sharing error in a completely decentralized manner. Moreover, the VSI output current quality can also be improved at the same time. Simulation and experimental results from a typical microgrid prototype are provided for verification.

AB - Load power sharing is an important aspect of the parallel-connected voltage source inverters (VSIs). It is widely accepted that the active power sharing accuracy is ensured by the conventional frequency droop control, whereas the reactive power sharing is poor because of mismatched grid impedances. To overcome this challenge, a novel control scheme is proposed in this paper, which utilizes the inherent dead-time effect to improve the reactive power sharing. As compared with most of the existing power-sharing approaches, the proposed control scheme can eliminate the reactive power sharing error in a completely decentralized manner. Moreover, the VSI output current quality can also be improved at the same time. Simulation and experimental results from a typical microgrid prototype are provided for verification.

KW - Dead-time effect.

KW - Islanded microgrids

KW - Parallel inverters

KW - Reactive power sharing

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ER -

Decentralized reactive power sharing among parallel inverters through inherent dead-time effect

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