I. Introduction
Microgrids generally referred to as new architecture of modern power systems, are interconnection of distributed energies (DGs), energy storages, loads and communication structure. In microgrids, all components are interconnected to a control center via two-way communication links. Microgrids operate in two working modes, grid connected and islanded modes. In this paper, we focused on Load Frequency Control (LFC) which is more critical in islanded operating mode as frequency and voltage are not supported by the main power grid despite in grid-connected mode. LFC for microgrids is more challenging because of massive deployment of renewable energies leveraged as non-dis-patchable energy sources whose power generation extremely depends on the weather conditions. Large-penetration of renewable energies, such as wind turbines, and loads bring a great deal of uncertainty to LFC of a microgrid that cause frequency deviation. LFC aims to keep a balance between supply and load that can be endangered by the frequency deviation associated with inherent nature of renewable energies and loads in microgrids. To cope with these uncertainties, a stochastic control approach is needed.