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Enhanced Andronov–Hopf Oscillator Grid-Forming Inverters with Voltage-Independent Active-Power Droop Coefficient
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Meghdad Fazeli ,
Saeed Golestan
IEEE Journal of Emerging and Selected Topics in Power Electronics, Pages: 1 - 1
Swansea University Authors:
HAMED REZAZADEH, Mohammad Monfared , Meghdad Fazeli
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DOI (Published version): 10.1109/jestpe.2026.3689646
Abstract
Virtual oscillator control (VOC), particularly the Andronov–Hopf oscillator (AHO), has emerged as a promising grid-forming (GFM) strategy due to its fast transient response and inherent synchronisation capability. However, in conventional AHO-based inverters, the active power droop coefficient is in...
| Published in: | IEEE Journal of Emerging and Selected Topics in Power Electronics |
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| ISSN: | 2168-6777 2168-6785 |
| Published: |
Institute of Electrical and Electronics Engineers (IEEE)
2026
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa71871 |
| Abstract: |
Virtual oscillator control (VOC), particularly the Andronov–Hopf oscillator (AHO), has emerged as a promising grid-forming (GFM) strategy due to its fast transient response and inherent synchronisation capability. However, in conventional AHO-based inverters, the active power droop coefficient is inherently dependent on the voltage amplitude, which degrades frequency support under grid disturbances and leads to power-sharing inaccuracies. This paper proposes an enhanced AHO (EAHO) control strategy that achieves a voltage-independent active power droop coefficient while preserving the original AHO structure and its favourable dynamic characteristics. The proposed modification enhances frequency and voltage support, improves active and reactive power support, ensures accurate power sharing in stand-alone parallel operation with other GFM inverters, and enhances stability under severe grid voltage sags. Large-signal and small-signal analysis, as well as comprehensive experimental validation on 2.5 kVA single-phase inverters, confirm the superior steady-state performance, improved grid-support capability, and robust stability of the proposed EAHO under wide-ranging grid conditions. |
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| College: |
Faculty of Science and Engineering |
| Start Page: |
1 |
| End Page: |
1 |