Enhanced Rule-based Energy Management System for an Islanded Microgrid

This paper proposed an enhanced rule-based energy management system (ERB-EMS) for an islanded microgrid composed of photovoltaic (PV) system, wind turbine (WT), energy storage system (ESS) and diesel generator (DiGen). The intermittent nature of renewable energy generation makes the output power fluctuate. Therefore, an EMS is required to ensure a reliable operation of the microgrid. Rule-based energy management systems (RB-EMSs) are widely used in the study of microgrid planning. Choosing the right RB-EMS is crucial for a cost-effective operation. The performance of RB-EMS proposed by previous researchers are compared and the best RB-EMS is enhanced with the day-ahead load shifting mechanism to form ERB-EMS that maximize the utilization of renewable energy and hence, reduce total operational costs, greenhouse gas (GHG) emissions costs, and power losses. The ERB-EMS proposed is simulated using MATLAB and the results are compared with other proposed RB-EMSs. Results showed that ERB-EMS reduces operational costs by $2827.96, GHG emissions cost by $87.87 and power losses by 1742.77 kW.