Resumo

RIOFRIO, Jonathan  e  FARKAS, Csaba. Self-Synchronverters: Emulation of Synchronous Generators with Inverters to Inject Virtual Inertia into 60-Hz Power Systems Considering Self-Synchronization. Revista Técnica energía [online]. 2022, vol.18, n.2, pp.25-37. ISSN 2602-8492.  https://doi.org/10.37116/revistaenergia.v18.n2.2022.497.

Power generation from renewable resources and smart grid integration are trending topics in power systems nowadays. Nevertheless, they are strengthening the lack of inertia at the operation stage of the modern power systems. This fact has endorsed the emergence of new digital inertia emulation techniques in order to tackle this operative constraint. One of these techniques is the so-called synchronverter (SV) technology, which tries to mimic the operation of a synchronous generator (SG) using DC/AC inverters. Indeed, a SV lets power systems to control grid-connected renewable energy power plants and avoid losing voltage and frequency stability. This paper introduces a variation of the original model of a SV, which is able to synchronize itself with the electrical grid before the connection and track the frequency of the grid after it. Likewise, its power circuit is modified to include a photovoltaic (PV) system and a Maximum Power Point Tracker (MPPT) as DC voltage sources. It and the calculation of the SV parameters at 60-Hz frequency provide a grade of novelty to this research. Finally, the simulation results in MATLAB verify a reliable operation of the proposed SV under variations of active (P) and Reactive (Q) powers over a test grid.

Palavras-chave : Droop control; infinite bus; maximum power point tracker (MPPT) controller; photovoltaic (PV) system; synchronverter (SV); virtual inertia; and virtual synchronous machines.

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