ABSTRACT
In islanded mode, the Microgrids (MG) must keep a sufficient level of distributed power generation and energy storage in order to enhance system stability and to guarantee the quality of the local load. MG are defined as smart power systems including loads, distributed generations, and energy storage systems grouped together within a limited geographic area. MG can operate either in grid-connected or islanded mode. In grid-connected mode, the MG is connected to a highly available power grid which may act as an additional power source for the MG. The MG power system supports the power in grid-connected and/or MG-connected modes. Smart power grids represent a new concept of power distribution systems, combining information communication technologies, control methodologies, and electrical power grids. An MG is modeled as an inventory system, where both the power internal production and the power internal demand are stochastic processes.
