Optimization of exchange of electrical energy between microgrid and electricity utility distribution network

Microgrids are autonomous subsystems, in which generation units, energy storage units and power and electrical energy consumers appear. Microgrid can operate in synchronous mode with distribution network of electricity utility (electric power company), or in autonomous (islanded) mode. The problem of optimization of exchange of electrical energy between microgrid and distribution network of electricity utility has been described in the paper. The optimization problem has been formulated and its mathematical model has been presented. The objective function and set of constraints have been presented, as well as algorithm of solution based on evolutionary algorithms technique. The results of optimization calculations, obtained for exemplary low voltage microgrid, based on defined objective function, have been presented. By the end of the paper conclusions and remarks resulting with carried out optimization calculations have been presented.