The expansion of renewable energy is continuing powerfully. The inspiration on the power supply system by the variability of the in feed must be met with new concepts called smart grid. In this study, we explore the potentials of integrating microgrid as a cooperating unit in the power supply network to support further expansion of renewable energy sources (RES). The main concern and backbone of the smart grid is micro grid, which integrates different distributed generation systems, storage units and electrical loads. The main objective of this study is modelling a micro grid system from a combination of renewable energy resources such as Solar photovoltaic and wind with Storage battery which are operated in a grid-connected mode in Bahir Dar city, Ethiopia. There is a need to use storage system or grid system for providing incessant power supply to the load. The system is designed to meet the customer load demand of the city in a reliable manner and good power quality, which cannot be met using conventional system generation alone. Residential, institutional, commercial, agricultural, and small-scale industrial loads with an average electricity demand of 15,467 KWh per day are estimated. The Optimal sizing of the micro grid system components are done using HOMER (Hybrid optimization multi-energy resource) pro software. The simulation results showed that the PV-wind based grid-connected micro grid system with a storage battery in meeting the load requirements in relation to the optimal sizing of PV panel and the wind turbine is sustainable, techno-economically viable and environment friendly
Microgrid, HOMER, PV Panel, Wind Turbine, MATLAB/Simulink
Cite this paper
Mezigebu Getinet Yenalem, Livingstone, M H Ngoo, Dereje Shiferaw, Peterson Hinga. (2020) Modelling and Optimal Sizing of Grid-Connected Micro grid System using HOMER in Bahir Dar City, Ethiopia. International Journal of Power Systems, 5, 1-12
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