Energy management of solar microgrids through fuzzy logic control: A review

In a microgrid system, the intermittent nature of renewable energy sources necessitates the use of supplemental energy sources to ensure the continuous electricity supply to electrical loads. An introspection into an effective energy management technique for a microgrid system was conducted. Fuzzy logic control (FLC) has been discovered as an effective power management strategy for solar-powered microgrids. Solar intensity varies throughout the day thus the need for the real-time management of power flow between components within the microgrid system. The battery State of Charge (SOC) and the power balance between the distributed generation (DG) unit and the electrical loads serve as inputs for an FLC algorithm. The FLC will determine whether the microgrid system may function in an island or grid-connected mode based on a set of rules for real-time input evaluation. A key role of the FLC in a microgrid system is to maintain a desired level of the battery SOC. The FLC can also be utilized for optimization of existing microgrid systems to make energy profits through the strategic buying and selling of power from and to the utility grid.