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A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

doi: 10.3390/en14217372
This paper focuses on the methods that ensure the rotor angle stability of electric power systems, which is most frequently analyzed with small-signal models. Over the past several decades, power system stabilizers (PSSs) for conventional excitation systems were the main tools for improving the small-signal stability of electromechanical oscillatory modes. In the last decade, power oscillation damping (POD) control implemented in photovoltaic (PV) inverters has been considered an alternative to PSSs. As PV generation undergoes massive rollout due to policy directions and renewable energy source integration activities, it could potentially be used as a source of damping, which is crucial for sustaining the rotor angle stability of the remaining in-service synchronous generators. Several studies have already been dedicated to the development of different damping strategies. This paper contributes to the existing research in power system stability by providing a comprehensive review of the effects of PV generation on small-signal stability, as well as the recent evolution of POD control through PV inverters. The features and impacts of the various ways to realize POD controllers are assessed and summarized in this paper. Currently, detailed information and discussions on the practical application of PV inverter PODs are not available. This paper is, thus, intended to initiate a relevant discussion and propose possible implementation approaches concerning the topic under study.
- National Centre for Information and Documentation Bulgaria
- Technical University of Varna Bulgaria
- Technical University of Varna Bulgaria
- National Centre for Information and Documentation Bulgaria
microgrid, Technology, power oscillation damping, small-signal stability, T, virtual synchronous generator, electromechanical oscillation, photovoltaic inverter
microgrid, Technology, power oscillation damping, small-signal stability, T, virtual synchronous generator, electromechanical oscillation, photovoltaic inverter
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