A Robust Controller for Battery Energy Storage System of an Islanded AC Microgrid

A battery energy storage system (BESS) can play a critical role in regulating system frequency and voltage in an islanded microgrid. A \mu-synthesis-based robust control has been proposed for dc link voltage regulation of BESS for achieving frequency regulation and voltage quality enhancement of isl...

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Bibliographic Details
Published in:IEEE transactions on industrial informatics 2022-01, Vol.18 (1), p.207-218
Main Authors: Som, Shreyasi, De, Souradip, Chakrabarti, Saikat, Sahoo, Soumya Ranjan, Ghosh, Arindam
Format: Article
Language:English
Subjects:
Batteries
Battery energy storage system (BESS)
Benchmarks
Control stability
Controllers
Converters
Distributed generation
Emulators
Energy storage
Frequency control
frequency regulation
islanded microgrid
Low voltage
Mathematical model
Microgrids
Robust control
State of charge
Synthesis
Uncertainty
Voltage control
voltage quality
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Summary:A battery energy storage system (BESS) can play a critical role in regulating system frequency and voltage in an islanded microgrid. A \mu-synthesis-based robust control has been proposed for dc link voltage regulation of BESS for achieving frequency regulation and voltage quality enhancement of islanded microgrid. Variation in the operating condition of ac microgrid affects the operating condition of the BESS' converter. This controller synthesis accounts for such uncertain variations as parametric uncertainty. The stability and performance of the proposed controller can be guaranteed for bounded parametric variations. The bounds on parameters are selected based on practical limitations of BESS. In this article, the proposed controller's performance is tested on an islanded CIGRE TF C6:04:02 benchmark low voltage ac microgrid system. The importance of dc link voltage regulation is analyzed based on performance comparison with a benchmark controller. The controller performance is also validated using a real-time Typhoon HIL emulator.
ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2021.3057516