Assessment and Experimental Validation of Grid-Forming Inverters’ Capability Counteracting Low-Frequency Oscillations
The integration of inverter-based resources (IBRs) is reshaping power grid 1 operation by reducing system inertia, which impacts small-signal rotor angle stability and 2 increases low-frequency oscillations (LFOs). While power electronics based Flexible AC 3 Transmission systems (FACTS) have been th...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad del País Vasco |
| Repositorio: | Addi. Archivo Digital para la Docencia y la Investigación |
| OAI Identifier: | oai:addi.ehu.eus:10810/74693 |
| Acceso en línea: | http://hdl.handle.net/10810/74693 |
| Access Level: | acceso abierto |
| Palabra clave: | grid forming inverters power distribution power grids power oscillation 18 damping |
| Sumario: | The integration of inverter-based resources (IBRs) is reshaping power grid 1 operation by reducing system inertia, which impacts small-signal rotor angle stability and 2 increases low-frequency oscillations (LFOs). While power electronics based Flexible AC 3 Transmission systems (FACTS) have been the primary solution, the shift of IBR control 4 toward grid-forming (GFM) is changing this approach. GFM control inherently provides 5 inertia and affects small-signal stability, but implementing power oscillation damping 6 (POD) algorithms in these inverters presents challenges, particularly regarding active 7 power based ones (POD-P). Although various POD-P solutions are emerging for GFM 8 inverters, few studies evaluate their impact on the GFM device itself and their inherent 9 capabilities, such as inertia and damping. This paper proposes that any design methodology 10 should consider, besides the impact of POD controls on the grid, their effect on the GFM 11 devices properties. It introduces a theoretical framework using the network frequency 12 perturbation (NFP) approach to assess this impact. Additionally, a simple POD-P control 13 method is proposed for GFM controllers, with simplicity as its key advantage. The desired 14 damping effect, along with the absence of impact on other frequency components, is 15 verified through NFP analysis. The theoretical findings are experimentally validated with 16 test bench results. |
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