A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids

Panbao Wang; Xu Yang; Wei Wang; Guihua Liu; Dianguo Xu

doi:10.1109/ECCE.2015.7310530

A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids

School of Electrical Engineering and Automation, Harbin Institute of Technology

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

8 Scopus citations

Abstract

Photovoltaic (PV) units in DC microgrids (MGs) usually have two operating modes including constant voltage control (CVC) mode and maximum power point tracking (MPPT) mode. When the operating mode of PV units switches between CVC and MPPT, unexpected transient problems of output voltage and current may occur. Droop control applied in DC-MGs can achieve load current sharing at the time when more than two voltage-source units are connected in parallel. This paper puts forward a seamless switching control strategy of PV units in DC-MGs based on droop control. The proposed control strategy consists of voltage-current inner loops, droop control loop, and MPPT module. In this paper, conventional control strategy of PV units in DC-MGs is introduced firstly, and then the droop characteristics of voltage-shifting are analyzed. A basic DC-MG system made up of PV unit, DC load and AC grid interface inverter is set up to validate the proposed control strategy. The MPPT performance of proposed control strategy is tested. Experimental results show that compared with the conventional control strategy, better transient characteristic is achieved by using the proposed seamless switching control strategy.

Original language	English
Title of host publication	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	6206-6211
Number of pages	6
ISBN (Electronic)	9781467371506
DOIs	https://doi.org/10.1109/ECCE.2015.7310530
State	Published - 27 Oct 2015
Externally published	Yes
Event	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada Duration: 20 Sep 2015 → 24 Sep 2015

Publication series

Name	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

Conference

Conference	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
Country/Territory	Canada
City	Montreal
Period	20/09/15 → 24/09/15

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Dc microgrid
droop control
photovoltaic unit
seamless switching
voltage shifting

Access to Document

10.1109/ECCE.2015.7310530

Cite this

Wang, P., Yang, X., Wang, W., Liu, G., & Xu, D. (2015). A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 (pp. 6206-6211). Article 7310530 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2015.7310530

@inproceedings{03794a766ec64b0c9ad782d9ad482213,

title = "A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids",

abstract = "Photovoltaic (PV) units in DC microgrids (MGs) usually have two operating modes including constant voltage control (CVC) mode and maximum power point tracking (MPPT) mode. When the operating mode of PV units switches between CVC and MPPT, unexpected transient problems of output voltage and current may occur. Droop control applied in DC-MGs can achieve load current sharing at the time when more than two voltage-source units are connected in parallel. This paper puts forward a seamless switching control strategy of PV units in DC-MGs based on droop control. The proposed control strategy consists of voltage-current inner loops, droop control loop, and MPPT module. In this paper, conventional control strategy of PV units in DC-MGs is introduced firstly, and then the droop characteristics of voltage-shifting are analyzed. A basic DC-MG system made up of PV unit, DC load and AC grid interface inverter is set up to validate the proposed control strategy. The MPPT performance of proposed control strategy is tested. Experimental results show that compared with the conventional control strategy, better transient characteristic is achieved by using the proposed seamless switching control strategy.",

keywords = "Dc microgrid, droop control, photovoltaic unit, seamless switching, voltage shifting",

author = "Panbao Wang and Xu Yang and Wei Wang and Guihua Liu and Dianguo Xu",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 ; Conference date: 20-09-2015 Through 24-09-2015",

year = "2015",

month = oct,

day = "27",

doi = "10.1109/ECCE.2015.7310530",

language = "英语",

series = "2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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booktitle = "2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015",

address = "美国",

}

Wang, P, Yang, X, Wang, W , Liu, G & Xu, D 2015, A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids. in 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015., 7310530, 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015, Institute of Electrical and Electronics Engineers Inc., pp. 6206-6211, 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015, Montreal, Canada, 20/09/15. https://doi.org/10.1109/ECCE.2015.7310530

A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids. / Wang, Panbao; Yang, Xu; Wang, Wei et al.
2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 6206-6211 7310530 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015).

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

TY - GEN

T1 - A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids

AU - Wang, Panbao

AU - Yang, Xu

AU - Wang, Wei

AU - Liu, Guihua

AU - Xu, Dianguo

PY - 2015/10/27

Y1 - 2015/10/27

N2 - Photovoltaic (PV) units in DC microgrids (MGs) usually have two operating modes including constant voltage control (CVC) mode and maximum power point tracking (MPPT) mode. When the operating mode of PV units switches between CVC and MPPT, unexpected transient problems of output voltage and current may occur. Droop control applied in DC-MGs can achieve load current sharing at the time when more than two voltage-source units are connected in parallel. This paper puts forward a seamless switching control strategy of PV units in DC-MGs based on droop control. The proposed control strategy consists of voltage-current inner loops, droop control loop, and MPPT module. In this paper, conventional control strategy of PV units in DC-MGs is introduced firstly, and then the droop characteristics of voltage-shifting are analyzed. A basic DC-MG system made up of PV unit, DC load and AC grid interface inverter is set up to validate the proposed control strategy. The MPPT performance of proposed control strategy is tested. Experimental results show that compared with the conventional control strategy, better transient characteristic is achieved by using the proposed seamless switching control strategy.

AB - Photovoltaic (PV) units in DC microgrids (MGs) usually have two operating modes including constant voltage control (CVC) mode and maximum power point tracking (MPPT) mode. When the operating mode of PV units switches between CVC and MPPT, unexpected transient problems of output voltage and current may occur. Droop control applied in DC-MGs can achieve load current sharing at the time when more than two voltage-source units are connected in parallel. This paper puts forward a seamless switching control strategy of PV units in DC-MGs based on droop control. The proposed control strategy consists of voltage-current inner loops, droop control loop, and MPPT module. In this paper, conventional control strategy of PV units in DC-MGs is introduced firstly, and then the droop characteristics of voltage-shifting are analyzed. A basic DC-MG system made up of PV unit, DC load and AC grid interface inverter is set up to validate the proposed control strategy. The MPPT performance of proposed control strategy is tested. Experimental results show that compared with the conventional control strategy, better transient characteristic is achieved by using the proposed seamless switching control strategy.

KW - Dc microgrid

KW - droop control

KW - photovoltaic unit

KW - seamless switching

KW - voltage shifting

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U2 - 10.1109/ECCE.2015.7310530

DO - 10.1109/ECCE.2015.7310530

M3 - 会议稿件

AN - SCOPUS:84963593291

T3 - 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

SP - 6206

EP - 6211

BT - 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015

Y2 - 20 September 2015 through 24 September 2015

ER -

Wang P, Yang X, Wang W , Liu G , Xu D. A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc. 2015. p. 6206-6211. 7310530. (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). doi: 10.1109/ECCE.2015.7310530

A seamless switching control strategy of photovoltaic units in droop-controlled DC microgrids

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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