A Fuzzy Logic Based Microgrid Energy Management System (Case Study Oda Bultum University)

Abstract

In response to the increased demand for electricity and the need for reliable power sources,microgrid systems have gained importance. However, power systems have become morecomplex and vulnerable, resulting in unstable power supply, and limited access, particularly atOda Bultum University. The university heavily relies on diesel generators and the national grid,which are expensive and unreliable. As a result, fuzzy logic-based microgrid energymanagement system has become necessary. The load demand, solar and wind weatherconditions were collected from a select site. This thesis uses Matlab/Simulink to develop ahybrid solar/wind microgrid system with battery backup. The system served as a small-scalealternative power source for three power-sensitive areas at Oda Bultum University (library,registrar?�?s office, and data center). The total load demand energy consumption isapproximately 367kWh. Load demand energy consumption covered by solar panels is 76% ofthe total load demand energy consumption which was 278.92kWhwith wind turbinescontributing around 24% of total load demand energy consumption which was 88.1kWh.Battery used as a backup for high-priority loads during solar and wind power outages, as wellas when main utility power is unavailable. The available resources were intelligently managedusing fuzzy logic, and it examined the type and quantity of resources before making an informedselection on the power demand. The fuzzy rule editor was used to create fuzzy rules, andMatlab/Simulink was used to simulate the components of the hybrid system. Based on theselected appropriate components to meet the site's energy demand. Specifically, SPR-305E-WHT-D photovoltaic panels, wind turbines, maximum power points, bidirectional DC-to-DCconverters, inverters, and 12V, 200Ah deep cycle batteries were chosen. Simulation resultsshow the system maintains a stable 400V DC bus with 212A DC current from renewablesources. An inverter then converts this 400V DC to 400V AC, providing with 125A AC current.The inverter-based design helps