Virtual synchronous generators dynamic performances

In this paper, dynamic performances of virtual synchronous generator are investigated. The virtual synchronous generator is based on the synchronverter (VSG) concept which is an inverter that mimics a synchronous generator (SG). The real and reactive power delivered by VSGs connected in parallel and operated as generators can be automatically shared using the well-known frequency and voltage drooping mechanisms. The VSG method is tested in comparison with the standard SG of the same parameters and capacity on a two bus test network. A comparative assessment is presented in terms of local performances and the fault critical clearing time (CCT). The results indicate good local performances and the contribution of the synchronverter to enhance the stability margin of the neighbouring AC zone.