Issue |
Sci. Tech. Energ. Transition
Volume 79, 2024
Emerging Advances in Hybrid Renewable Energy Systems and Integration
|
|
---|---|---|
Article Number | 75 | |
Number of page(s) | 8 | |
DOI | https://doi.org/10.2516/stet/2024081 | |
Published online | 02 October 2024 |
Regular Article
Synergistic adaptive control of virtual inertia and damping coefficient in virtual synchronous generators for standalone microgrid applications
1
Shijiazhuang Campus of Army Engineering University of PLA, Shijiazhuang 050000, PR China
2
Xiangtan University, Xiangtan 411100, PR China
* Corresponding author: harmony2013@163.com
Received:
8
July
2024
Accepted:
3
September
2024
The current control methods for virtual synchronous generators (VSG) in regulating inverter frequency in standalone microgrids at border posts and remote mountainous regions remain suboptimal. This study introduces a small-signal VSG model to elucidate the intrinsic dynamics of the virtual inertia and damping coefficient, along with their coupled interrelationship. A novel VSG control approach is proposed, featuring synergistic adaptive regulation of both virtual inertia and damping coefficient. This approach is designed to optimize the interaction of the virtual inertia and damping coefficient with the frequency difference and rate of frequency variation, within a predefined operational range. Additionally, it adaptively modulates these parameters to mitigate further frequency reductions, taking into account the frequency difference and active power when deviations occur outside the predefined range. The experiments demonstrate that this approach effectively moderates the rate of frequency change, diminishes frequency departure velocity for approximately 4 times the original during disturbances, expedites frequency stabilization post-disturbance, the stabilization time is reduced by at least half of the original and prevents excessive frequency deviations. The implementation of this method significantly enhances the response speed and accuracy of frequency control in standalone microgrids, contributing to improved overall system stability.
Key words: Damping coefficient / Standalone microgrid / Synergetic adaptive control / Virtual inertia
© The Author(s), published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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