Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Integration and optimization of renewables and storages for rural electrification

Auteur : ABEGAZ, TAMRAT DEMLLIE

Université de soutenance : Politecnico di Milano

Grade : Tesi Specialistiche/Magistrali 2015

Résumé
As the electricity access in Sub-Saharan African countries is below 10%, introducing a microgrid (a case study in Abiy Addi, Ethiopia) for rural electrification as a result can overcome the endemic lack of modern electricity access that hampers the provision of basic services for rural communities from basic services like education, healthcare, safety, economic and social growth. A different generation mix of renewables, diesel generator as a backup system and storages have been analysed and studies on economic and technical aspects of energy production for resilience, micro-grid stability and remote power so as to get the most optimal configuration for electricity generation. Among the many possible energy storage systems, Hydrogen storage and Battery are examined and studied to improve the use of renewable energy sources ensuring that the load is met at all times. This research considers different possible comparison methods considering variations like land area required, location for the storage, efficiency, availability and reliability of energy resources, and technology cost variability (investment cost and levelised cost of electricity) are among the major key parameters used to assess the best possible utilization of renewables and storage system either using them in the form of integrated, hybrid or independently. The study is carried out largely with the help of the Micopower optimization modelling simulator called HOMER. As a result, the study proposes the use of PV-Wind-Hydro-Battery hybrid system model that concludes the optimal configuration of power systems at affordable price for underserved rural communities. Hence, remarkably, the study has also found that the microgrid generation mixture with hydrogen fuelled cell as storage systems configuration alone is not feasible since it requires high demand of electricity for hydrogen production in a more efficient way. However, it is recommended the use of additional battery storage together with the compressed hydrogen gas as storage for operation

Mots clés : energie rinnovabili ; sistema di stoccaggio ; stoccaggio di idrogeno ; batterie ; celle a combustibile — renewable energy ; storage system ; hydrogen storage ; battery ; fuel cell

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