Design and simulation of a DC microgrid system for a remote community in Nigeria

Oyogbuda, Japhet Chikanka (2022) Design and simulation of a DC microgrid system for a remote community in Nigeria. Masters thesis, Memorial University of Newfoundland.

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Abstract

The thesis presents the design and modelling of an off-grid Stand-alone Photovoltaic (PV) system for a house and DC microgrid system for a remote community. Using a 48V DC bus, the system was sized using Homer Pro and dynamic simulation was done in Simulink. Optimization results presented various designs out of which the most preferred cost effective and efficient system for the house and remote community was selected. The selected remote community is isolated and located far away from the city with no access to the electricity grid. The community is made up of 9 residences which are not more than 100m apart. House 1 was selected as the standard house with a load of 1kWh/day, while the other 8 houses have a load difference of ±10% with reference to house 1. Using a 48V DC bus, the PV systems were designed for each house in the community. The systems were sized using Homer Pro. Optimization results presented various cost effective design for each community house. Sensitivity analysis was carried out to show the robustness for both the single residence and the community microgrid design. Simulation results showing the stability of the system and power sharing in the community using a 48V DC bus. Microgrid dynamic simulation is done in Simulink. Complete details of system design and dynamic simulation results are presented and explained in this thesis.

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