Small signal modeling and analysis of synchronverters

Synchronverters are inverters that mimic the synchronous generators. The synchronverter can be easily operated in both island mode and on-grid mode, which is very suitable for the Micro-grid. A new method to get the small signal model of the synchronverter is proposed in this paper. The decoupling of the active power and reactive power of the synchronverter will also be discussed. The mathematic model of synchronverters are briefly talked about first; then the small signal modeling of synchronverters, also the method of choosing the suitable operational parameters of synchronverters are proposed. At last, a 5kW+5kvar laboratory prototype is designed to prove the validity of the small signal model. Simulation and experimental results verified the validity of the presented method.