A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids

Fulong Li, Zhengyu Lin, Wenping Cao, Alian Chen, Jiande Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Small-scale DC microgrids have been popular in recent years due to their flexibility and wide applications. Droop control is one of the most widely applied control method in interface converters for a DC microgrid. However, methods to select proper droop coefficients or droop coefficient zones are rarely discussed in reported literatures. This paper analyzes the impact caused by large droop coefficients from loop-gain perspective, and proposes a low pass filer method to avoid the significant DC bus voltage variations, which is harmful to the power quality and voltage-based control strategies. Also, a droop coefficient zone is defined according to the current sharing and DC bus voltage variations. A simulation study has been implemented to validate the proposed droop coefficient zone and feasibility of the proposed low pass filer method.
Original languageEnglish
Title of host publication2018 IEEE Energy Conversion Congress and Exposition (ECCE)
PublisherIEEE
Pages1151-1155
ISBN (Electronic)978-1-4799-7312-5
ISBN (Print)978-1-4799-7313-2
DOIs
Publication statusPublished - 6 Dec 2018
Event2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA
Duration: 23 Sep 201827 Sep 2018

Publication series

Name2018 IEEE Energy Conversion Congress and Exposition (ECCE)
PublisherIEEE
ISSN (Print)2329-3721
ISSN (Electronic)2329-3748

Conference

Conference2018 IEEE Energy Conversion Congress and Exposition (ECCE)
Period23/09/1827/09/18

Fingerprint

Low pass filters
Electric potential
Power quality

Cite this

Li, F., Lin, Z., Cao, W., Chen, A., & Wu, J. (2018). A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE) (pp. 1151-1155). (2018 IEEE Energy Conversion Congress and Exposition (ECCE)). IEEE. https://doi.org/10.1109/ECCE.2018.8557455
Li, Fulong ; Lin, Zhengyu ; Cao, Wenping ; Chen, Alian ; Wu, Jiande. / A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids. 2018 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2018. pp. 1151-1155 (2018 IEEE Energy Conversion Congress and Exposition (ECCE)).
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title = "A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids",
abstract = "Small-scale DC microgrids have been popular in recent years due to their flexibility and wide applications. Droop control is one of the most widely applied control method in interface converters for a DC microgrid. However, methods to select proper droop coefficients or droop coefficient zones are rarely discussed in reported literatures. This paper analyzes the impact caused by large droop coefficients from loop-gain perspective, and proposes a low pass filer method to avoid the significant DC bus voltage variations, which is harmful to the power quality and voltage-based control strategies. Also, a droop coefficient zone is defined according to the current sharing and DC bus voltage variations. A simulation study has been implemented to validate the proposed droop coefficient zone and feasibility of the proposed low pass filer method.",
author = "Fulong Li and Zhengyu Lin and Wenping Cao and Alian Chen and Jiande Wu",
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Li, F, Lin, Z, Cao, W, Chen, A & Wu, J 2018, A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids. in 2018 IEEE Energy Conversion Congress and Exposition (ECCE). 2018 IEEE Energy Conversion Congress and Exposition (ECCE), IEEE, pp. 1151-1155, 2018 IEEE Energy Conversion Congress and Exposition (ECCE), 23/09/18. https://doi.org/10.1109/ECCE.2018.8557455

A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids. / Li, Fulong; Lin, Zhengyu; Cao, Wenping; Chen, Alian; Wu, Jiande.

2018 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2018. p. 1151-1155 (2018 IEEE Energy Conversion Congress and Exposition (ECCE)).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids

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AB - Small-scale DC microgrids have been popular in recent years due to their flexibility and wide applications. Droop control is one of the most widely applied control method in interface converters for a DC microgrid. However, methods to select proper droop coefficients or droop coefficient zones are rarely discussed in reported literatures. This paper analyzes the impact caused by large droop coefficients from loop-gain perspective, and proposes a low pass filer method to avoid the significant DC bus voltage variations, which is harmful to the power quality and voltage-based control strategies. Also, a droop coefficient zone is defined according to the current sharing and DC bus voltage variations. A simulation study has been implemented to validate the proposed droop coefficient zone and feasibility of the proposed low pass filer method.

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Li F, Lin Z, Cao W, Chen A, Wu J. A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE. 2018. p. 1151-1155. (2018 IEEE Energy Conversion Congress and Exposition (ECCE)). https://doi.org/10.1109/ECCE.2018.8557455