Hybrid Renewable Energy System

Rising electricity demand and the environmental cost of fossil-fuel generation call for reliable, low-carbon power supply for coastal communities.This paper presents the design, simulation and techno-economic assessment of a gridconnected hybrid renewable energy system (HRES) that combines solar photovoltaic (PV), wind and tidal (hydrokinetic) generation with a lithium-ion battery and a power converter to serve 50 residential houses at Kalaswada, Karwar, Karnataka, India.The system is modelled in HOMER Pro 3.18.5 using an annual load of 121,612 kWh (average 333.18 kWh/day, peak 30.31 kW) and site resource data from NREL and NASA POWER.The simulation results indicate that the 69.6 kW solar PV array, 11 kW wind turbine, and 40 kW hydrokinetic turbine generate approximately 64,694 kWh/year, 17,140 kWh/year, and 275,272 kWh/year, respectively.The hybrid system achieves a renewable energy contribution of 99.66% with zero capacity shortage.It requires only 1,536 kWh/year of electricity from the grid, while the excess generation of 233,795 kWh/year is supplied back to the grid.The 100kWh battery is never dispatched, which indicates scope for right-sizing.The component cost total is $218,447.83.The proposed hybrid system has potential for practical implementation, supporting a reliable, sustainable, and environmentally friendly energy supply for the community.