An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems

Hongpeng Liu; Yongheng Yang; Xiongfei Wang; Poh Chiang Loh; Frede Blaabjerg; Wei Wang; Dianguo Xu

doi:10.1109/APEC.2016.7468029

An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems

Hongpeng Liu, Yongheng Yang, Xiongfei Wang, Poh Chiang Loh, Frede Blaabjerg, Wei Wang, Dianguo Xu

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

7 Citations (Scopus)

Abstract

Traditional droop-controlled systems assume that the generators are able to provide sufficient power as required. This is however not always true, especially in renewable systems, where the energy sources (e.g., photovoltaic source) may not be able to provide enough power (or even loss of power generation) due to the intermittency. In that case, unbalance in active power generation may occur among the paralleled systems. Additionally, most droop-controlled systems have been assumed to be a single dc-ac inverter with a fixed dc input source. The dc-dc converter as the front-end of a two-stage photovoltaic (PV) system has not been considered. In this paper, an enhanced droop scheme is thus proposed to address those issues, and the proposed scheme can enable resilient active power sharing in parallel two-stage PV inverter systems. Furthermore, a small-signal analysis for the proposed droop control strategy is carried out. Experiments have verified the effectiveness of the proposed droop control scheme.

Original language	English
Title of host publication	Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
Number of pages	8
Publisher	IEEE
Publication date	Mar 2016
Pages	1253-1260
ISBN (Print)	978-1-4673-8394-3, 978-1-4673-8393-6, 978-1-4673-9551-9
ISBN (Electronic)	978-1-4673-9550-2
DOIs	https://doi.org/10.1109/APEC.2016.7468029
Publication status	Published - Mar 2016
Event	31st Annual IEEE Applied Power Electronics Conference and Exposition - Long Beach Convention Center, Long Beach, United States Duration: 20 Mar 2016 → 25 Mar 2016 http://www.apec-conf.org

Conference

Conference	31st Annual IEEE Applied Power Electronics Conference and Exposition
Location	Long Beach Convention Center
Country/Territory	United States
City	Long Beach
Period	20/03/2016 → 25/03/2016
Internet address	http://www.apec-conf.org

Keywords

Microgrid
Two-stage PV systems
Single-phase systems
Droop control
Active power sharing
Small-signal modelling

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10.1109/APEC.2016.7468029

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Cite this

@inproceedings{11825ef4f9a1435ab753cda9be9d727d,

title = "An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems",

abstract = "Traditional droop-controlled systems assume that the generators are able to provide sufficient power as required. This is however not always true, especially in renewable systems, where the energy sources (e.g., photovoltaic source) may not be able to provide enough power (or even loss of power generation) due to the intermittency. In that case, unbalance in active power generation may occur among the paralleled systems. Additionally, most droop-controlled systems have been assumed to be a single dc-ac inverter with a fixed dc input source. The dc-dc converter as the front-end of a two-stage photovoltaic (PV) system has not been considered. In this paper, an enhanced droop scheme is thus proposed to address those issues, and the proposed scheme can enable resilient active power sharing in parallel two-stage PV inverter systems. Furthermore, a small-signal analysis for the proposed droop control strategy is carried out. Experiments have verified the effectiveness of the proposed droop control scheme.",

keywords = "Microgrid, Two-stage PV systems, Single-phase systems, Droop control, Active power sharing, Small-signal modelling",

author = "Hongpeng Liu and Yongheng Yang and Xiongfei Wang and Loh, {Poh Chiang} and Frede Blaabjerg and Wei Wang and Dianguo Xu",

year = "2016",

month = mar,

doi = "10.1109/APEC.2016.7468029",

language = "English",

isbn = "978-1-4673-8394-3",

pages = "1253--1260",

booktitle = "Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC)",

publisher = "IEEE",

address = "United States",

note = "31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 ; Conference date: 20-03-2016 Through 25-03-2016",

url = "http://www.apec-conf.org",

}

Liu, H, Yang, Y, Wang, X, Loh, PC, Blaabjerg, F, Wang, W & Xu, D 2016, An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems. in Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, pp. 1253-1260, 31st Annual IEEE Applied Power Electronics Conference and Exposition, Long Beach, United States, 20/03/2016. https://doi.org/10.1109/APEC.2016.7468029

An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems. / Liu, Hongpeng; Yang, Yongheng; Wang, Xiongfei et al.
Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2016. p. 1253-1260.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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T1 - An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems

AU - Liu, Hongpeng

AU - Yang, Yongheng

AU - Wang, Xiongfei

AU - Loh, Poh Chiang

AU - Blaabjerg, Frede

AU - Wang, Wei

AU - Xu, Dianguo

PY - 2016/3

Y1 - 2016/3

N2 - Traditional droop-controlled systems assume that the generators are able to provide sufficient power as required. This is however not always true, especially in renewable systems, where the energy sources (e.g., photovoltaic source) may not be able to provide enough power (or even loss of power generation) due to the intermittency. In that case, unbalance in active power generation may occur among the paralleled systems. Additionally, most droop-controlled systems have been assumed to be a single dc-ac inverter with a fixed dc input source. The dc-dc converter as the front-end of a two-stage photovoltaic (PV) system has not been considered. In this paper, an enhanced droop scheme is thus proposed to address those issues, and the proposed scheme can enable resilient active power sharing in parallel two-stage PV inverter systems. Furthermore, a small-signal analysis for the proposed droop control strategy is carried out. Experiments have verified the effectiveness of the proposed droop control scheme.

AB - Traditional droop-controlled systems assume that the generators are able to provide sufficient power as required. This is however not always true, especially in renewable systems, where the energy sources (e.g., photovoltaic source) may not be able to provide enough power (or even loss of power generation) due to the intermittency. In that case, unbalance in active power generation may occur among the paralleled systems. Additionally, most droop-controlled systems have been assumed to be a single dc-ac inverter with a fixed dc input source. The dc-dc converter as the front-end of a two-stage photovoltaic (PV) system has not been considered. In this paper, an enhanced droop scheme is thus proposed to address those issues, and the proposed scheme can enable resilient active power sharing in parallel two-stage PV inverter systems. Furthermore, a small-signal analysis for the proposed droop control strategy is carried out. Experiments have verified the effectiveness of the proposed droop control scheme.

KW - Microgrid

KW - Two-stage PV systems

KW - Single-phase systems

KW - Droop control

KW - Active power sharing

KW - Small-signal modelling

U2 - 10.1109/APEC.2016.7468029

DO - 10.1109/APEC.2016.7468029

M3 - Article in proceeding

SN - 978-1-4673-8394-3

SN - 978-1-4673-8393-6

SN - 978-1-4673-9551-9

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BT - Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

PB - IEEE

T2 - 31st Annual IEEE Applied Power Electronics Conference and Exposition

Y2 - 20 March 2016 through 25 March 2016

ER -

An Enhanced Droop Control Scheme for Resilient Active Power Sharing in Paralleled Two-Stage PV Inverter Systems

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