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Implementation and Stability Study of Dynamic Droop in Islanded Microgrids

Augustine Egwebe Orcid Logo, Meghdad Fazeli, Petar Igic, Paul M. Holland

IEEE Transactions on Energy Conversion, Volume: 31, Issue: 3, Pages: 821 - 832

Swansea University Author: Augustine Egwebe Orcid Logo

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DOI (Published version): 10.1109/TEC.2016.2540922

Abstract

This paper presents a dynamic droop load sharing scheme based on the available generation capacity of the distributed generation (DG) units. Since conventional droop schemes share loads proportional to units' ratings, they suffer from the inability to maintain an efficient operating point when...

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Published in: IEEE Transactions on Energy Conversion
ISSN: 0885-8969 1558-0059
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa30817
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spelling 2016-10-25T10:07:14.2271321 v2 30817 2016-10-25 Implementation and Stability Study of Dynamic Droop in Islanded Microgrids d5ffa623b56e225005868c183357e133 0000-0001-6478-1203 Augustine Egwebe Augustine Egwebe true false 2016-10-25 EEEG This paper presents a dynamic droop load sharing scheme based on the available generation capacity of the distributed generation (DG) units. Since conventional droop schemes share loads proportional to units' ratings, they suffer from the inability to maintain an efficient operating point when their input renewable power varies, without imposing their new operating point on other connected DGs in the microgrid. This problem is mainly due to the insensitivity of the droop scheme to the varying nature of the renewable resources used, including wind and solar photovoltaic (PV). A control method is proposed for PV systems; however, it is applicable for all types of droop-controlled renewable DG. A stability analysis of the proposed scheme on DG units is also presented to identify theoretical and practical limits. The proposed scheme identifies the dc operating zone of the inverter-based source as irradiance level changes and conditions the droop parameters appropriately for an efficient load sharing based on available generation, while the rating of each unit is also taken into account. The proposed scheme provides energy saving, since energy demand from a local auxiliary generator is reduced. The proposed method is validated using MATLAB/SIMULINK simulations. Journal Article IEEE Transactions on Energy Conversion 31 3 821 832 0885-8969 1558-0059 30 9 2016 2016-09-30 10.1109/TEC.2016.2540922 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University 2016-10-25T10:07:14.2271321 2016-10-25T10:06:31.8415387 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Augustine Egwebe 0000-0001-6478-1203 1 Meghdad Fazeli 2 Petar Igic 3 Paul M. Holland 4
title Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
spellingShingle Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
Augustine Egwebe
title_short Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
title_full Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
title_fullStr Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
title_full_unstemmed Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
title_sort Implementation and Stability Study of Dynamic Droop in Islanded Microgrids
author_id_str_mv d5ffa623b56e225005868c183357e133
author_id_fullname_str_mv d5ffa623b56e225005868c183357e133_***_Augustine Egwebe
author Augustine Egwebe
author2 Augustine Egwebe
Meghdad Fazeli
Petar Igic
Paul M. Holland
format Journal article
container_title IEEE Transactions on Energy Conversion
container_volume 31
container_issue 3
container_start_page 821
publishDate 2016
institution Swansea University
issn 0885-8969
1558-0059
doi_str_mv 10.1109/TEC.2016.2540922
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 0
active_str 0
description This paper presents a dynamic droop load sharing scheme based on the available generation capacity of the distributed generation (DG) units. Since conventional droop schemes share loads proportional to units' ratings, they suffer from the inability to maintain an efficient operating point when their input renewable power varies, without imposing their new operating point on other connected DGs in the microgrid. This problem is mainly due to the insensitivity of the droop scheme to the varying nature of the renewable resources used, including wind and solar photovoltaic (PV). A control method is proposed for PV systems; however, it is applicable for all types of droop-controlled renewable DG. A stability analysis of the proposed scheme on DG units is also presented to identify theoretical and practical limits. The proposed scheme identifies the dc operating zone of the inverter-based source as irradiance level changes and conditions the droop parameters appropriately for an efficient load sharing based on available generation, while the rating of each unit is also taken into account. The proposed scheme provides energy saving, since energy demand from a local auxiliary generator is reduced. The proposed method is validated using MATLAB/SIMULINK simulations.
published_date 2016-09-30T03:37:33Z
_version_ 1763751654997360640
score 11.035765

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