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

Nikolay Nikolaev, Kiril Dimitrov and Yulian Rangelov
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Nikolay Nikolaev: Electric Power Engineering Department, Technical University of Varna, Studentska str. 1, 9010 Varna, Bulgaria
Kiril Dimitrov: Electric Power Engineering Department, Technical University of Varna, Studentska str. 1, 9010 Varna, Bulgaria
Yulian Rangelov: Electric Power Engineering Department, Technical University of Varna, Studentska str. 1, 9010 Varna, Bulgaria

Energies, 2021, vol. 14, issue 21, 1-26

Abstract: 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.

Keywords: power oscillation damping; small-signal stability; photovoltaic inverter; electromechanical oscillation; virtual synchronous generator; microgrid (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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