Simulation of direct current microgrid and study of power and battery charge/discharge management

Abstract

This work presents a mathematical model of a DC microgrid 
supplied with photovoltaic and wind power generation, storage 
(battery bank) and a conventional power grid. The microgrid has 
electrical loads domestic and commercial profiles. This model 
is utilized to propose, implement and analyze a new voltage 
management in this theorical microgrid; for this, microgrid is 
simulated and some of its elements have no limits on some 
variables of work, which is used to determine the maximum 
values during simulations; therefore, it serves to assessments 
of the behavior of the system parameters: voltage, current, 
power and energy according to the values of temperature, solar 
radiation, wind speed, altitude and information on the behavior
of the electric loads on the place where DC microgrid will be 
installed. Too, power management has been implemented. Three 
scenarios that represent the reality of this microgrid in normal 
operation are presented with all possible operating conditions 
and has been simulated and discussed with the purpose of 
defining working sub-voltages in DC microgrid nominal voltage. 
The importance of the present research is the possibility to 
evaluate the implementation of microgrids using the behavior 
of environmental variables, in order to determine the size 
the necessary equipment and to determine the management 
of power and voltage of the proposed microgrid. Too, is the 
possibility of evaluating the implementation of microgrids in 
places already existing or to be constructed, using patterns of
consumption and behavior of environmental variables with the 
purpose of dimensioning the equipment and to evaluate the 
technique of power and voltage management proposal.