Short-Circuit Performance of a Synchronverter-Based Microgrid

Abstract

Replacing synchronous generators with inverters in power grids reduces system inertia. To address this issue, the synchronconverter has been proposed as an alternative solution. This paper presents a comparative analysis of the dynamic and steady-state responses of an AC microgrid interconnected to the grid during three-phase and single-phase short-circuit events, while progressively replacing inverters with synchronverters. The results obtained show that with the incorporation of inverters with this function, the frequency deviations are smaller, the frequency oscillations are slower and the steady-state error decreases. This is compared to a system with only inverters with a conventional control law. The case study consisting of a microgrid with three inverters and interconnected to the grid was implemented in Matlab/Simulink.