Energy Management System for an Isolated Microgrid with Photovoltaic Generation

A comparison of two energy management systems for an isolated microgrid based on photovoltaic generation is presented in this paper. One energy management system is presented as an optimization problem solved by means of a mixed integer linear programming which aims to minimize the operating cost of the microgrid. The algorithm determines the optimal power dispatch of all distributed generation units using reduced linear models and operating constraints for each unit, together with a cost function, and historical information of meteorological and demand conditions. The simulation of the microgrid is carried out in Matlab. Results from the mixed integer linear programming are compared with results obtained from a proposed weighted algorithm, showing a reduction in the operating cost of the microgrid when the mixed integer linear programming algorithm is used; however, this algorithm spent more processing time than the weighted algorithm.