Adaptive Observer-Based Grid-Synchronization and Sequence Extraction Techniques for Renewable Energy Systems: A Comparative Analysis

Ahmed, Hafiz and Benbouzid, Mohamed (2021) Adaptive Observer-Based Grid-Synchronization and Sequence Extraction Techniques for Renewable Energy Systems: A Comparative Analysis. Applied Sciences, 11 (2). e653. ISSN 2076-3417

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Abstract

Various faults and disturbances often make the grid unbalanced and distorted. To make the grid-connected converters resilient to unbalanced and distorted grid, real-time estimation of grid voltage sequences are essential. Adaptive-observer based grid-synchronization techniques are very suitable for this purpose. In this paper, a comparative analysis of three recently proposed adaptive observer-based grid-synchronization technique are presented for frequency estimation and sequence extraction. The considered techniques are: global adaptive observer, gain normalized adaptive observer, and second-order generalized integrator type adaptive observer. Following a fair and systematic gain tuning process, the performances are verified through extensive numerical simulation and experiments. Experimental results demonstrate the merits and demerits of the individual techniques. Academic researchers and industrial practitioners will find the results useful for the selection of adaptive observer-based grid-synchronization and sequence extraction techniques.

Item Type:	Article
Additional Information:	** From MDPI via Jisc Publications Router ** History: accepted 01-01-2021; pub-electronic 11-01-2021. ** Licence for this article: https://creativecommons.org/licenses/by/4.0/
Identification Number:	https://doi.org/10.3390/app11020653
Dates:	Date Event 1 January 2021 Accepted 11 January 2021 Published
Uncontrolled Keywords:	grid-synchronization, frequency-locked loop, sequence extraction, grid-connected renewable energy systems
Subjects:	CAH10 - engineering and technology > CAH10-03 - materials and technology > CAH10-03-07 - materials science
Divisions:	Faculty of Computing, Engineering and the Built Environment > College of Engineering
SWORD Depositor:	JISC PubRouter
Depositing User:	JISC PubRouter
Date Deposited:	14 Jan 2021 09:18
Last Modified:	20 Jun 2024 11:50
URI:	https://www.open-access.bcu.ac.uk/id/eprint/10729

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