Received:
2026-05-11 | Accepted:
2026-08-12 | Published:
2026-09-30
Title
Theoretical and conceptual foundations of European energy security
Abstract
In recent years, the energy security of the European Union has become one of the most significant issues in European public policy and legal regulation. Its importance has been profoundly shaped by geopolitical disruptions, risks to energy supply, and Russia's military aggression against Ukraine. This publication aims to examine the theoretical and conceptual foundations of European energy security by identifying the principal elements of energy security, the risks arising from energy dependence, and the significance of diversification, while also assessing the role of energy security in the evolution of European Union policy. The study employs general scientific analytical, comparative, and systemic research methods. The analysis is based on recent academic literature, European Union legislation, and official documents issued by the European Commission, the International Energy Agency (IEA), the Agency for the Cooperation of Energy Regulators (ACER), and other international organisations. The findings indicate that contemporary energy security is a multidimensional concept encompassing not only secure and uninterrupted energy supply but also the resilience of energy systems, the protection of critical energy infrastructure, economic security, sustainable development, and the capacity to adapt to geopolitical challenges. The analysis demonstrates that the diversification of energy suppliers and transport routes, the expansion of renewable energy sources, improvements in energy efficiency, and the key instruments of the European Union's common energy policy—including the Energy Union, the European Green Deal, and REPowerEU—constitute the foundation for strengthening European energy security. The results of this study provide a theoretical basis for analysing the legal framework governing European Union energy security and its future development in the context of armed conflict and other emergency situations.
Keywords
energy security, security of energy supply, energy dependence, diversification, Energy Union, REPowerEU, European Union, legal framework
JEL classifications
K14
, K20
, K22
URI
http://jssidoi.org/jesi/article/6694
DOI
Pages
468-479
Funding
This research was funded by Daugavpils University, Latvia
This is an open access issue and all published articles are licensed under a
Creative Commons Attribution 4.0 International License
References
Agency for the Cooperation of Energy Regulators. (2023). ACER market monitoring report 2023. Publications Office of the European Union https://www.ceer.eu/national-report/national-reporting-2023/
Search via ReFindit
Al-Saidi, M. (2023). White knight or partner of choice? The Ukraine war and the role of the Middle East in the energy security of Europe. Energy Strategy Reviews, 49, 101116 https://doi.org/10.1016/j.esr.2023.101116
Search via ReFindit
Azzuni, A., & Breyer, C. (2018). Definitions and dimensions of energy security: A literature review. WIREs Energy and Environment, 7(1), e268 https://doi.org/10.1002/wene.268
Search via ReFindit
Burke, J. G., Carrillo, J. E., & Vakharia, A. J. (2007). Single versus multiple supplier sourcing strategies. European Journal of Operational Research, 182(1), 95-112 https://doi.org/10.1016/j.ejor.2006.07.007
Search via ReFindit
Council of the European Union. (2023). Energy diplomacy: Strengthening the external dimension of the EU energy policy https://www.eeas.europa.eu/eeas/eu-energy-and-climate-diplomacy-%E2%80%93-strengthening-sovereignty-and-advancing-global-clean-transition_en
Search via ReFindit
De Rosa, M., Gainsford, K., Pallonetto, F., & Finn, D.P. (2022). Diversification, concentration and renewability of the energy supply in the European Union, Energy, 253, 124097 https://doi.org/10.1016/j.energy.2022.124097
Search via ReFindit
European Commission. (2015). A framework strategy for a resilient energy union with a forward-looking climate change policy (COM(2015) 80 final) https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:52015DC0080
Search via ReFindit
European Commission. (2019). The European Green Deal (COM(2019) 640 final) https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:52019DC0640
Search via ReFindit
European Commission. (2022). REPowerEU plan (COM(2022) 230 final) https://eur-lex.europa.eu/resource.html?uri=cellar:fc930f14-d7ae-11ec-a95f-01aa75ed71a1.0001.02/DOC_1&format=PDF
Search via ReFindit
European Commission. (2023). Report on the state of the Energy Union 2023 (COM(2023) 650 final) https://energy.ec.europa.eu/strategy/energy-union/8th-report-state-energy-union_en
Search via ReFindit
European Network of Transmission System Operators for Electricity (ENTSO-E). (2022). System outlook and adequacy forecast (SOAF) 2022 https://energy.ec.europa.eu/news/eu-network-electricity-transmission-system-operators-reports-overall-favourable-adequacy-results-2023-11-16_en
Search via ReFindit
European Network of Transmission System Operators for Electricity (ENTSO-E). (2023). System outlook and adequacy forecast (SOAF) 2023 https://energy.ec.europa.eu/news/eu-network-electricity-transmission-system-operators-reports-overall-favourable-adequacy-results-2023-11-16_en
Search via ReFindit
European Parliament. (2023). Four challenges of the energy crisis for the EU's strategic autonomy. European Parliamentary Research Service https://www.europarl.europa.eu/thinktank/en/document/EPRS_BRI(2023)747099
Search via ReFindit
Funding: This research was funded by Daugavpils University, Latvia /jesi/article/6694
Search via ReFindit
Hancher, L., & De Hauteclocque, A. (2025). EU strategic energy autonomy and the electrification strategy (Working Paper 2025/51). Cadmus EUI Research Repository https://cadmus.eui.eu/entities/publication/e511346e-e68d-481c-8397-5e65f9ad17d9
Search via ReFindit
International Energy Agency. (2020). European Union 2020: Energy policy review. OECD Publishing https://www.oecd.org/en/publications/european-union-2020_29733c64-en.html
Search via ReFindit
International Energy Agency. (2021). Security of clean energy transitions. IEA https://www.iea.org/reports/security-of-clean-energy-transitions
Search via ReFindit
International Energy Agency. (2023). World energy outlook 2023. IEA https://www.iea.org/reports/world-energy-outlook-2023
Search via ReFindit
International Energy Agency. (2024). World energy outlook 2024. IEA https://www.iea.org/reports/world-energy-outlook-2024
Search via ReFindit
International Renewable Energy Agency. (2023). World energy transitions outlook 2023: 1.5°C pathway. IRENA https://www.irena.org/Digital-Report/World-Energy-Transitions-Outlook-2023
Search via ReFindit
Ivančík, R., & Andrassy, V. (2026a). The geopolitisation of the European Union: Strategic adaptation in a shifting global order. World, 7(6), 97 https://doi.org/10.3390/world7060097
Search via ReFindit
Ivančík, R., & Andrassy, W. (2026b). The geopolitical transformation of the EU in the era of polycrisis: Hybrid adaptation of a compound polity after 2022. World, 7(4), Article 69, 1-16 https://doi.org/10.3390/world7040069
Search via ReFindit
Ivančík, R., & Dušek, J. (2026). Insights into transformation of European security policy in the light of the war in Ukraine and escalating geopolitical changes, Insights into Regional Development, 8(1), 10-25 https://doi.org/10.70132/c8725828569
Search via ReFindit
Kelly, W.A., Jr. (1981). A generalized interpretation of the Herfindahl index. Southern Economic Journal, 48(1), 50-57 https://doi.org/10.2307/1058595
Search via ReFindit
Lekavičius, V., Balsiūnaitė, R., Bobinaitė, V., Konstantinavičiūtė, I., Rimkūnaitė, K., Štreimikienė, D., & Tarvydas, D. (2024). The diversification of energy resources and equipment imports in the European Union. Energy, 307, 132595 https://doi.org/10.1016/j.energy.2024.132595
Search via ReFindit
Monie, S. M., Gustafsson, M., Önnered, S., & Guruvita, K. (2025). Renewable and integrated energy system resilience – A review and generic resilience index. Renewable and Sustainable Energy Reviews, 215, 115554 https://doi.org/10.1016/j.rser.2025.115554
Search via ReFindit
North Atlantic Treaty Organization. (2023a). Critical energy infrastructure protection https://www.gssc.lt/en/publication/energy-security-and-critical-infrastructure-protection/
Search via ReFindit
North Atlantic Treaty Organization. (2023b). Vilnius summit communiqué https://www.nato.int/en/about-us/official-texts-and-resources/official-texts/2023/07/11/vilnius-summit-communique
Search via ReFindit
Organisation for Economic Co-operation and Development. (2023). OECD economic outlook 2023. OECD https://www.oecd.org/en/publications/oecd-economic-outlook/volume-2023/issue-1_ce188438-en.html
Search via ReFindit
Regulation (EU) 2017/1938 of the European Parliament and of the Council of 25 October 2017 concerning measures to safeguard the security of gas supply and repealing Regulation (EU) No 994/2010. (2017). Official Journal of the European Union, L 280, 1-56 https://eur-lex.europa.eu/eli/reg/2017/1938/oj/eng
Search via ReFindit
Rubio-Varas, M., & Muñoz-Delgado, B. (2019). Long-term diversification paths and energy transitions in Europe. Ecological Economics, 163, 158-168 https://doi.org/10.1016/j.ecolecon.2019.04.025
Search via ReFindit
Samaras, C. (2025). Decarbonization can improve energy security. Nature Climate Change, 15, 467-468 https://doi.org/10.1038/s41558-025-02317-x
Search via ReFindit
Schmitz, R., Flachsbarth, F., Plaga, L. S., Braun, M., & Härtel, P. (2025). Energy security and resilience: Revisiting concepts and advancing planning perspectives for transforming integrated energy systems. Energy Policy. Advance online publication https://doi.org/10.1016/j.enpol.2025.114796
Search via ReFindit
Streimikiene, D., Siksnelyte-Butkiene, I., & Lekavicius, V. (2023). Energy diversification and security in the EU: Comparative assessment in different EU regions. Economies, 11(3), 83 https://doi.org/10.3390/economies11030083
Search via ReFindit
Teivāns-Treinovskis, J., Jefimovs, N., Velika, R., & Trofimovs, I. (2023). Legal conditions of EU energy security. Entrepreneurship and Sustainability Issues, 10(4), 39-47 http://doi.org/10.9770/jesi.2023.10.4(3
Search via ReFindit
Teivāns-Treinovskis, J., Lavrinovicha, I., & Lavrinenko, O. (2015). Influence of education on unemployment rate and incomes of residents. Procedia - Social and Behavioral Sciences, 174, 3824-3831 https://doi.org/10.1016/j.sbspro.2015.01.1120
Search via ReFindit
Tvaronavičienė, M., Radavičius, T., & Groesser, N. S. (2025). Assessment of constraints in the European Union photovoltaics circular supply chain for enhanced circularity. Journal of Cleaner Production, 489, 144682 https://doi.org/10.1016/j.jclepro.2025.144682
Search via ReFindit
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