Dynamic simulation of power electronics dominated micro-grids

Dynamic analysis of a power system is normally performed using a stability type approach, when the interest is in low frequency dynamics, in order to save simulation time. However the standard stability type methodology needs to be modified, when applied to power electronics dominated micro-grids, where the sources of the system are interfaced with inverters and there may be no synchronous machine directly connected to the network. In this paper the stability algorithm is adjusted so that it can be used for this purpose. Various case studies demonstrate the capability of the modified algorithm to simulate the operating modes of a micro-grid