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PublicationUtilizing Flexibility Potentials in Local Energy Systems( 2023)
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PublicationOpportunities and challenges of high renewable energy deployment and electricity exchange for North Africa and Europe - scenarios for power sector and transmission infrastructure in 2030 and 2050( 2016)Climate change and limited availability of fossil fuel reserves stress both the importance of deploying renewable energy sources (RES) for electricity generation and the need for a stronger integration of regional electricity markets. This analysis focuses on North African (NA) countries, which possess vast resources of renewable energy but whose electricity supply is still largely dependent on fossil fuels. An analysis of cost-optimized deployment scenarios for RES is conducted in five NA countries in 2030 and 2050. Three electricity models are combined to derive results covering trans-regional to sub-national level, including a detailed analysis of grid capacities and future transmission challenges. Further, opportunities for integration of European and NA electricity markets are evaluated. Results confirm that, by 2050, high RES shares - close to 100% - are possible in NA. Wind energy is the dominant technology. Concentrated Solar Power (CSP) plants also play an important role with rising RES shares due to the possibility to store thermal energy. Electricity exports to Europe gain particular importance in the period after 2030. Substantial transmission grid reinforcements on AC-level and the construction of a high voltage DC overlay grid are prerequisites for the forecasted scenarios.
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PublicationA pan-European-North African HVDC grid for bulk energy transmission - a model-based analysis( 2014)The usage of renewable energy is gaining importance due to national and international targets for reduction of CO2 emissions and consumption of fossil fuels and respective renewable energy deployment goals. Due to the volatile nature of renewable energy and regional potentials for generation in remote areas, there is a need for a better integration of generation and load centers in a common transmission infrastructure. This can be done by establishing a meshed HVDC overlay grid for bulk electricity transmission over long distances. Therefore, this paper describes the outlook for renewable energy deployment by 2050 in the North African region, as well as the potential to export renewable energy to Europe. It analyses the existing AC transmission grid infrastructure and explains why a meshed pan-European-North African HVDC overlay grid will solve the transmission requirements for the target year 2050.
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Publication"SuperGrid" - Das europäisch-nordafrikanische HGÜ-Overlay-Netz der Zukunft( 2013)Die Stromerzeugung aus erneuerbaren Energien (EE) wie Sonne, Wind und Wasser ist ein weltweit wachsender Zukunftsmarkt. Sie dient dem Klimaschutz und kann dem Schwinden fossiler Ressourcen entgegenwirken. Dem gegenüber stellt die zunehmende Einspeisung EE jedoch hohe Anforderungen an den Transport und die Verteilung des Stromes durch die Volatilität der EE. Einspeisung, Transport und Verteilung des Stromes gewinnen somit immer mehr an Bedeutung und erfordern einen Ausbau der Stromnetze. Darüber hinaus kommt künftig den Regionen mit einer hohen Verfügbarkeit an EE eine große Rolle zu. Im Rahmen verschiedener Projekte wird evaluiert inwiefern erzeugter Strom aus EE aus z. B. den Regionen Nordafrikas (NA) in die Wirtschaftszentren Süd- und Mitteleuropas transportiert werden kann. In der vorliegenden Veröffentlichung werden die Ergebnisse einer Studie zur Entwicklung des nordafrikanisch-europäischen Stromaustauschs dargestellt. Dabei werden mögliche Entwicklungen für die Stromerzeugung in NA und dem -export nach Europa ermittelt, gegenwärtige Gegebenheiten der Übertragungsnetze analysiert und die Notwendigkeit, Struktur und Art eines überlagernden Netzes bewertet. Angesichts der großen zu übertragenden Leistungen und zu überwindenden Distanzen, sowie anderer technischer Rahmenbedingungen, kommt nach heutigem Stand der Technik lediglich eine Hochspannungs-Gleichstrom-Übertragung (HGÜ) in Betracht. Auf Grund der erzielten Ergebnisse zum Elektrizitätstransport wird das dafür benötigte HGÜ-Netz vorgestellt und die Ausprägung der Stromerzeugung und Netzinfrastruktur in NA detailliert.
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PublicationA detailed North African HVDC grid for a pan-European-North African electricity exchange( 2013)Renewable energy (RE) has been chosen as an alternative to reduce fossil fuel and eliminate generation by nuclear power. The North African (NA) region has a vast potential for RE sources. The RE potential even exceeds the local demand, thus it has the potential to be exported to the Europe Union (EU). However, implementing such a pan-European-North African electricity exchange implies substantial challenges for the transmission grid infrastructure. An HVDC grid is chosen as the best alternative to transmit a huge amount of electricity over long distances. A detailed model is required to understand the HVDC grid behavior. Therefore, this paper presents the model of an HVDC grid for electricity exchange between NA and the EU. The paper defines the number of interconnectors, location of converter stations and transmission lines for the time horizon 2050.
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PublicationLeitfaden zum Risikomanagement für Trinkwasserversorgungen hinsichtlich gezielter Einträge von chemischen, biologischen oder radioaktiven Substanzen(TZW, 2013)
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PublicationSmart integration of electric vehicles into European power grids( 2010)The Fraunhofer-Institutes UMSICHT, ISI and IOSB are currently working on concepts and profitable business solutions for the integration of electric vehicles [EVs] in the global markets for control reserve, electric energy and local power grid services. The integration process is complex, due to partly competing interests of the involved actors (energy producer, supplier, grid operator, owner). Furthermore single EVs offer a small capacity in comparison to other market participants and their main purpose is to satisfy the mobility needs of the owners. To find a solution for these conflicting options the driving behaviour of potential EV users is analyzed to obtain information about grid connection times as well as battery specific parameters on working and weekend days. Based on these information specific grid connection scenarios for EVs are defined, which differ in their characteristics (e.g. place, time, duration of a (dis)charging process). The objective is to gain information about how to determine the real available positive or negative capacity/power of a pool of EVs in a grid. The next step is to examine how the defined global and local marketing options can be integrated to balance individual interests (e.g. cost optimized charging for the user, arbitrage for the pool operator, security of energy supply for the grid operator) and political interests (safe and efficient energy distribution system).
