The increasing incidence of distributed generation (DG) and active distributed networks, changing regularities, and needs to improve the power system reliability and clean power support is providing development of a new power system perception commonly referred to as the smart grid (SG). In this regard, the microgrid (MG) can be considered as one of the most promising concepts. A MG is essentially an active distribution network defined as an integrated power delivery system. A MG consists of a low-voltage (LV) network composed of loads, renewable energy sources (RESs), and DG units operating as a single controllable load connected to the main grid. Compared to the conventional power plants, a MG is characterized by specific operation and constraints depending on several critical stochastic parameters. So far, MGs have been mostly established as test-bed platforms in some developed countries such as Japan, Canada, and the U.S. In fact, such concept cannot be widely implemented in practice without a prior successful establishment of an energy manager to achieve optimal and reliable control of the MG for a given site to minimize its operation cost while consolidating its reliability and environment-friendly features [1, 5-7, 12, 17, 23-27, 31].As an essential element in the new era of smart power, several approaches have been reported in the literature in relation to MG intelligent energy management applicable within the SG system [22,56]. A fuel consumption minimization approach has been proposed in [47] based on power sharing approach, in which the optimized cost function includes a penalty function for heat generation excess. The authors promoted the importance of a MG communication infrastructure allowing the coordination with RES forecasting as a part of the central control. However, the proposed approach does not take into account the prediction of RE power generation and the management of storage devices. In [76], mesh-adaptive direct-search-based optimization algorithm is applied for MG online energy management; however, this approach does not provide information regarding the forecasting of the RESs or load demand (LD). Moreover, the MG energy management problem has been reduced to