Abstract
For small islands that are not interconnected with the mainland, the penetration of intermittent renewable energy sources (RES), e.g., wind power, in the power supply system is limited, even when there is a large potential. This is due to technical constraints of the conventional generating units and the dynamic penetration limit that is usually applied for grid stability. This problem can be tackled with energy storage, namely, pumped hydro, when the topography is suitable. In addition, when an island has few or no freshwater resources and the desalination of seawater is a necessity, excess wind power can be provided to desalination units that can produce desalinated water to be used in the pumping and hydrostation and later be supplied to the population. This study couples these two issues, using an integrated approach to power and water supply systems’ planning, with the purpose of increasing the integration of intermittent RES and minimizing the electricity and water production costs. This approach is applied to the Island of S. Vicente, in Cape Verde, where the results show that the penetration of RES in an arid island can increase, while decreasing the production costs.
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