Impact of System Parameters on the Performance of Synchronverter

Abstract

Higher penetration of renewable energy based ‘distributed generators (DGs)’ is expected in the coming years to relieve the burden on the conventional utility grid. The power converters play a vital role in the integration of the DGs such as solar PV, wind, etc., with the grid. However, the interconnection of power converter based DGs with the utility grid has its challenges that need to be addressed. Unlike the conventional power plants, power converter based DGs reduce the total inertia of the system, as they do not have any inertial component. Reduction in the grid inertia can be addressed by using a synchronverter based control framework, which replicates the dynamics of a synchronous generator. In this paper, the model of the synchronverter is implemented in MATLAB/Simulink platform with a rating of 1 kVA, 200$\mathrm{V}_{\mathrm{r}\mathrm{m}\mathrm{s}}$ (L-L). A self-synchronization mechanism is used in the synchronverter for the smooth transitions between the grid-connected and the islanded modes of operation. The impact of system parameters such as the moment of inertia, integrator gain, droop coefficients, reference power, etc., on the performance of synchronverter has been conducted in the simulation environment and the results are discussed in this paper.