An intelligent control strategy for a distributed systems will be presented. The studied system consisting of renewable generations, one conventional generation, energy storages, loads and control units. The size of the micro-grid is determined on the base of the load and the renewable generations, the energy storages and the conventional generation have to be able to supply the DC loads when the weather conditions not are favorable to the PV and/or wind-turbine generations. The intelligent control method is used to regulate the DC voltage when the Microgrid is disconnected to the grid, i.e. islanded mode, due to disturbances, such as a fault and its subsequent switching incidents. Moreover the grid connected mode is considered to implement an intelligent energy management that will schedule the energy allocation at minimum cost on the base of the electricity market. The studied system with the control strategy have been implemented in MATLAB/Simulink, the results are presented and discussed in the thesis.