Abstract
Hybrid Renewable Energy Systems (HRES) are an attractive solution for the supply of electricity in remote areas like islands and communities where grid extension is difficult. Hybrid systems combine renewable energy sources with conventional units and battery storage in order to provide energy in an off-grid or on-grid system. The purpose of this study is to examine the techno-economical feasibility and viability of a hybrid system in Donoussa island, Greece, in different scenarios. A techno-economic analysis was conducted for a hybrid renewable energy system in three scenarios with different percentages of adoption rate (20%, 50% and 100%)and with different system configurations. Using HOMER Pro software the optimal system configuration between the feasible configurations of each scenario was selected, based on lowest Net Present Cost (NPC), minimum Excess Electricity percentage, and Levelized Cost of Energy (LCoE). The results obtained by the simulation could offer some operational references for a practical hybrid system in Donoussa island. The simulation results confirm the application of a hybrid system with 0% of Excess Electricity, reasonable NPC and LCoE and a decent amount of renewable integration.
Highlights
The optimal hybrid system is selected with respect to the lowest Net Present Cost (NPC) and Levelized Cost of Energy (LCoE)
The main target of this Scenario is the reduction of Excess Electricity as well as the NPC, the LCoE and the number of conventional units
Where the diesel generators provided just enough power to serve the load without charging the batteries a load following (LF) dispatch strategy is selected
Summary
Electricity power is vital for people’s daily life, social and economic development during the centuries. Power systems typically include four components, that correspond to the four main issues, namely generation, transmission, voltage transformation, and consumption. In some remote areas like islands, villages and farms it is difficult to construct transmission and distribution system for such a small demand of electricity. There are people all over the world not having access in electricity. Only a percentage of almost 10% of the total installed renewable capacity is included on non-interconnected islands (NIIs). Non-interconnected islands have small power systems, are dependent on Autonomous Power Systems (APS) which are considered both expensive and not environmentally friendly (since they consume diesel or heavy oil (mazut)).
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