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Strategies for integrating residential PV and wind energy in Eritrea's electricity grid by imposing feed-in constraints in low voltage network
Hungarian University of Agriculture and Life Sciences, Godöllö, Hungary; MaiNefhi College of Engineering and Technology, Asmara, Eritrea.
LUT University, Lappeenranta, Finland.
Halmstad University, School of Business, Innovation and Sustainability.ORCID iD: 0000-0002-7525-6954
Halmstad University, School of Business, Innovation and Sustainability.ORCID iD: 0000-0001-9982-5317
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2025 (English)In: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 286, article id 113140Article in journal (Refereed) In press
Abstract [en]

The global shift towards renewable energy necessitates careful planning and integration strategies, especially in regions like Eritrea, which have abundant solar and wind resources but limited grid infrastructure. This study explores strategies for maximizing direct renewable energy consumption by incorporating residential photovoltaic (PV) and wind energy into Eritrea's electricity grid. Our research offers a unique approach by proposing tailored grid expansion and management strategies to maximize renewable integration, specifically designed for the context of developing countries like Eritrea, addressing the specific challenges posed by limited infrastructure and data availability. By analyzing historical data and using simulation techniques, the study explored the ideal deployment of PV and battery storage systems to maximize penetration while minimizing curtailment, using a straightforward algorithm for PV injection, battery charging, and discharging for each hour of the year. Key findings reveal that imposing feed-in limit and integrating battery storage significantly reduce curtailment, with a feed-in limit of 0.4 to 0.5 kW/kWp and battery storage below 2 kWh/kWp yielding best results. The analysis also highlights the trade-off between installing additional PV capacity and battery capacity, especially at lower renewable capacity levels. In certain scenarios it is found that curtailment is preferred over storage, particularly at lower PV capacities. The study emphasizes the crucial role of storage utilization and balancing generators in maintaining grid stability during adverse weather and peak demand. These insights provide valuable guidance for policymakers and grid planners to advance sustainable energy strategies and achieve ambitious renewable energy targets in Eritrea. © 2024 The Author(s)

Place, publisher, year, edition, pages
Oxford: Elsevier, 2025. Vol. 286, article id 113140
Keywords [en]
Battery storage, Curtailment, Feed-in limit, Low voltage grid, Penetration, Residential PV
National Category
Energy Engineering Energy Systems
Identifiers
URN: urn:nbn:se:hh:diva-55061DOI: 10.1016/j.solener.2024.113140Scopus ID: 2-s2.0-85211341545OAI: oai:DiVA.org:hh-55061DiVA, id: diva2:1919876
Available from: 2024-12-10 Created: 2024-12-10 Last updated: 2024-12-18Bibliographically approved

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Ottermo, FredricMöllerström, Erik

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