Benefits of a non-synchronous microgrid on dense-load low-voltage secondary networks

 Abstract— The paper describes the advantages of using non- synchronous microgrids in networked systems containing densely concentrated loads. The non-synchronous bus ar- rangement, in addition to allowing for the integration of sub- stantially larger distributed generation, completely isolates transient disturbances from and to the network and the mi- crogrid. Significant is the fact that distributed generators in- stalled in the microgrid do not contribute to the short-circuit current that needs to be interrupted by the substation breakers. The behavior of the grid and the microgrid is investigated by comparing: the occurrence of faults, voltage reduction, and losses, in the presence and absence of the microgrid. The ben- efits of the dc microgrid are made evident with steady state and transient studies performed on a real distribution network in New York City.