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IAHO: Integrated Andronov-Hopf oscillator for providing ancillary services with single-phase grid-forming inverters
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Meghdad Fazeli ,
Saeed Golestan
Electric Power Systems Research, Volume: 254, Start page: 112625
Swansea University Authors:
HAMED REZAZADEH, Mohammad Monfared , Meghdad Fazeli
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DOI (Published version): 10.1016/j.epsr.2025.112625
Abstract
The increasing deployment of renewable energy sources is reducing system inertia and challenging grid stability. Meanwhile, the growing penetration of grid-forming(GFM) inverters offers opportunities to enhance frequency and voltage support. Among GFM techniques, virtual oscillator control (VOC) has...
| Published in: | Electric Power Systems Research |
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| ISSN: | 0378-7796 |
| Published: |
Elsevier BV
2026
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa71293 |
| Abstract: |
The increasing deployment of renewable energy sources is reducing system inertia and challenging grid stability. Meanwhile, the growing penetration of grid-forming(GFM) inverters offers opportunities to enhance frequency and voltage support. Among GFM techniques, virtual oscillator control (VOC) has emerged as a promising approach due to its superior dynamic performance, yet existing VOC strategies exhibit limitations in inertia emulation, damping, and droop accuracy. This paper proposes a control strategy based on the integrated Andronov–Hopf oscillator (IAHO) that, for the first time, unifies virtual inertia, enhanced damping, and voltage-independent droop control into a single framework. A comprehensive small-signal analysis is conducted to design the damping controllers, while a large-signal analysis evaluates transient stability under severe grid disturbances. Theoretical insights are experimentally validated on a 2.5 kVA single-phase inverter. Results demonstrate that the proposed IAHO delivers a lower rate of change of frequency (RoCoF), higher frequency nadir, well-damped power dynamics, and enhanced active power support compared to conventional VOC-based strategies. Moreover, the IAHO ensures positive reactive power droop during voltage sags, providing superior transient stability. |
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| Keywords: |
Battery energy storage system (BESS); Grid-forming (GFM) inverters; Transient stability; Virtual inertia; Virtual oscillator control (VOC) |
| College: |
Faculty of Science and Engineering |
| Funders: |
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. |
| Start Page: |
112625 |