| Abstract |
Hybrid Microgrids are currently of great interest and are considered the distribution and transmissionsystems of the future, because they enable the coexistence of the AC microgrids and DC microgrids.This paper deals with the implementation of a new power management algorithm of the powerconverters that form part of the hybrid microgrid of Distributed Generation. The hybrid microgridconsists of a DC bus, an AC bus and a connection to the public utility grid across a static switch. Themanagement algorithm executes the secondary control of the energy in the microgrid by means of aMicrogrid Central Controller. The system applies the most appropriate configuration of the powerconverters, depending on the changes of the solar irradiation, the load, the power limit and the state ofcharge of the battery bank. A communication system is used to controls each one of the microgridelements. Experimental and simulation results demonstrate that the algorithm allows to control thepower dispatch inside the microgrid properly, by performing the following tasks: (1) thecommunication among power converters, the grid operator and the intelligent loads, (2) the connectionand disconnection of the loads, (3) the control of the power exchange between the distributedgenerators and the energy storage system, (4) the compliance of the power dispatch limit set by thegrid operator, (5) the synchronization with the grid and (6) the control of the voltage at the DC bus. |
