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Buffered Microgrids with Modular Back-to-Back Converter Grid Interface
,
Ahmed A. Aboushady
Energies, Volume: 15, Issue: 21, Start page: 7879
Swansea University Author:
Meghdad Fazeli
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DOI (Published version): 10.3390/en15217879
Abstract
This paper proposes a buffered microgrid with a modular grid interface consisting of a modular back-to-back converter. The proposed method provides a flexible way that enables both load and generation expansion of the microgrid with no sizing constraints on the initial stage. The method keeps the ph...
| Published in: | Energies |
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| ISSN: | 1996-1073 |
| Published: |
MDPI AG
2022
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa61605 |
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| Abstract: |
This paper proposes a buffered microgrid with a modular grid interface consisting of a modular back-to-back converter. The proposed method provides a flexible way that enables both load and generation expansion of the microgrid with no sizing constraints on the initial stage. The method keeps the physical separation of the buffered microgrid from the grid by using back-to-back converters, which ensures safe, secure and seamless operation for both islanded and grid-connected operation modes. The proposed modular structure allows an energy exchange prioritization either between the energy storage systems and the grid, or between the energy storage units themselves, depending on the recommended/desired operational strategy. The prioritizations are achieved by using sets of dead-zones in the control of the interfacing converters. The current control technique in the dq-frame has been implemented with the inverse-droop control technique to control the voltage magnitude and frequency, using current control in the dq-frame. PSCAD/EMTDC software has been used to validate the proposed method through simulating different scenarios. The solution ensures a simple, flexible, and communication-free decentralized control for multi-source microgrids. |
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| Keywords: |
Buffered microgrid, Droop Control, Energy Management, Primary Control, Renewable Energy, Seamless Operation. |
| College: |
Faculty of Science and Engineering |
| Funders: |
This research received no external funding. |
| Issue: |
21 |
| Start Page: |
7879 |