Abstract
This paper intends to evaluate the impact of the introduction of electricity generation micro-systems based on 100% renewable sources to supply electricity demands of non-electrified rural residential houses in Santiago Island’s energy system (Cape Verde). For that purpose a comparison between three energy scenarios (2011–2030) were studied: a Reference Scenario, where it was assumed that the electricity grid would be expanded to increase households electrification rate and that grid connected renewable energy technologies will be used to increase generation power; a Diesel Scenario, where future electricity requirements would be provided by constructing new diesel power plants; and a Decentralized Scenario that is based on the Reference Scenario but that differs from it for the fact that it considers the installation of off-grid renewable energy micro systems (REMS) to attend electricity requirements of post-2010 electrified rural houses. The electricity supply–demand system of Santiago Island was modeled using an energy planning software and an optimal REMS design was modeled to provide electricity requirements of a typical Santiago’s household. Although it is clear that using renewable energy technologies (Reference Scenario) presents better results from an environmental and economical point of view than installing new diesel power plants (Diesel Scenario), using off-grid REMS to electrify post-2010 rural households (Decentralized Scenario) result to be even more beneficial than generate and distribute on-grid renewable electricity.
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