Optimal Design of a PV-RHFC Hybrid Micro-grid for Rural Electrification in Soa Village, Fiji

this paper introduces an innovative hybrid micro-grid design, merging photovoltaic (PV) and proton exchange membrane fuel cell (PEMFC) technologies for rural electrification in Fiji's Soa Village. The hybrid system aims to address intermittent renewable energy challenges and fulfill the village's energy needs sustainably. The hybrid micro-grid integrates Photovoltaics (PV) and Regenerative Hydrogen Fuel Cell (RHFC) systems to mitigate fossil fuel dependence and enhance environmental sustainability. Through meticulous modeling, this study demonstrates the hybrid micro-grid's potential. The system optimally balances the capacities of PV array, Proton Electrolytic Membrane Fuel Cell (PEMFC), Electrolyzer, and battery storage, ensuring reliable power. Impressively, the system boasts a mere $4874 annual operational cost, approximately $60 per household. Reduced land use is a highlight, requiring only 443 square meters due to optimized PV capacity. Nearby villages could adopt similar micro-grids, establishing a smart grid for efficient energy sharing. Comparative analysis emphasizes the hybrid system's economic viability, focusing on Levelized Cost of Energy (LCOE) and Net Present Cost (NPC). LCOE stands at $0.44, and NPC at $460,126 for the proposed hybrid system. This research pioneers RHFC systems for standalone micro-grid applications. In essence, the hybrid micro-grid offers a tangible solution for reliable, sustainable, and clean rural electrification.