Optimal energy management system implementation in power networks with multiple Microgrids by using multi-period imperialist competition

Optimal energy management in systems based on multiple Microgrids (MG) is a vital component to ensure the economic dispatch of generation resources. Energy management system (EMS) can be employed to achieve the optimum utilization of resources، to reach the operational performance targets in the MGs as well as to control exchange power among them and with grid as well. In this regard، a double-layer control scheme (DLCS) equipped with primary and secondary controllers are proposed in this paper. In primary control level، EMS is operating separately for each MG by considering the problem constraints and uncertainty of renewable resources by using Taguchi’s approach، power set-points of generation resources and possible shortage or surplus of power generation in the MGs. Then، the shortage or surplus generation of the MGs should be submitted to a central energy management system (CEMS) at the secondary layer. In order to validate the proposed control structure، a case study including two MGs and a lumped load is simulated and optimized based on multi-period imperialist competition (MICA) algorithm. Different scenarios are applied to evaluate the performance of the proposed DLCS. The obtained results clearly show that the proposed DLCS is effective for achieving optimal dispatch of generation resources in systems with multiple MGs. Furthermore، the proposed DLCS is able to control the performance of the MGs in interaction with the grid and with each other as well.