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Hybrid Energy Systems: Integration, Innovations, and Strategies for a Sustainable Future

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: 25 September 2026 | Viewed by 1456

Editor

Special Issue Information

Dear Colleagues,

The rapid transition toward low-carbon energy systems is driving the increasing deployment of hybrid energy systems that combine multiple renewable sources, storage technologies, and flexible demand. These systems, integrating wind, solar, biomass, hydropower, and emerging technologies such as hydrogen, offer significant advantages in reliability, resilience, and efficiency compared to single-source, primarily diesel, configurations. They are particularly critical in remote, islanded, and weakly interconnected regions, as well as in future power systems with high shares of variable renewable energy.

This Special Issue aims to provide a comprehensive overview of recent advances and emerging challenges in hybrid energy systems, covering both technological developments and system-level integration. Contributions about a wide range of topics are invited, including, but not limited to, the following:

  • Hybrid system design, modeling, optimization, and control;
  • Integration of energy storage technologies;
  • Coupling with hydrogen and thermal systems;
  • The role of artificial intelligence and data-driven methods in system operation and planning.

Particular emphasis is placed on the operation of hybrid systems under high renewable penetration, where flexibility, reliability, and energy management become key challenges. Topics such as microgrids, multi-energy systems, sector coupling, and hybridization strategies for industrial and remote applications are of special interest. In addition, contributions addressing techno-economic assessment, environmental impact, and policy or regulatory aspects are encouraged, to support the deployment of hybrid systems at scale.

This Special Issue welcomes original research articles, review papers, and case studies that contribute to advancing the understanding and practical implementation of hybrid energy systems. By bringing together interdisciplinary perspectives, this Special Issue aims to identify key research gaps and provide insights into future developments that will support the transition toward sustainable and resilient energy systems.

Prof. Dr. Adrian Ilinca
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hybrid energy systems
  • renewable energy integration
  • microgrids
  • energy storage
  • multi-energy systems
  • sector coupling
  • hydrogen energy
  • energy management
  • optimization
  • artificial intelligence
  • smart grids
  • remote and islanded systems
  • techno-economic analysis
  • energy transition
  • decarbonization

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Published Papers (2 papers)

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Research

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24 pages, 6044 KB  
Article
Power Control for Hybrid Isolated Micro-Grids: A Three-Level Converter-Based Experimental Approach
by Moussa Gaptia Lawan, Ahmed Al Ameri, Mamadou Baïlo Camara and Brayima Dakyo
Energies 2026, 19(14), 3350; https://doi.org/10.3390/en19143350 - 16 Jul 2026
Viewed by 368
Abstract
An advanced power control and energy management strategy for an isolated hybrid microgrid system is presented in this paper. With the help of a battery energy storage system (BESS), the architecture combines a wind turbine (WT) emulator, photovoltaic (PV) arrays, and a variable-speed [...] Read more.
An advanced power control and energy management strategy for an isolated hybrid microgrid system is presented in this paper. With the help of a battery energy storage system (BESS), the architecture combines a wind turbine (WT) emulator, photovoltaic (PV) arrays, and a variable-speed diesel generator (VSDG) emulated by a controlled DC source on a 1/22 reduced-scale laboratory platform. Three-level converters are used in a robust power control method to reduce the inherent intermittency of renewable sources and the stochastic nature of isolated loads. These converters are used to improve power quality, lower harmonic distortion, and control dynamic interactions between the sources in real time. The main goal is to minimize the VSDG contribution and estimated fuel consumption while optimizing renewable energy penetration, with fuel consumption reduction assessed through power dispatch analysis rather than direct measurement. Comprehensive simulations and real-time experimental prototyping using the dSPACE (CP1104) controller on a 1/22-scale platform were used to validate the proposed control strategy. Results from both simulations and experiments support the strategy’s viability and efficacy in preserving system stability and maximizing energy dispatch under various load profiles. Full article
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Review

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36 pages, 11320 KB  
Review
A Review of the European Floating Structures for Hybrid Renewable Energy Systems
by Alexandra Bujor, Ana-Maria Chirosca and Eugen Rusu
Energies 2026, 19(14), 3450; https://doi.org/10.3390/en19143450 - 22 Jul 2026
Viewed by 627
Abstract
The energy transition and global decarbonization goals have accelerated the development of offshore renewable energy technologies, particularly in deep-water regions, where fixed foundations are limited by technical and economic constraints. Floating structures offer new opportunities for harnessing marine renewable resources, allowing them to [...] Read more.
The energy transition and global decarbonization goals have accelerated the development of offshore renewable energy technologies, particularly in deep-water regions, where fixed foundations are limited by technical and economic constraints. Floating structures offer new opportunities for harnessing marine renewable resources, allowing them to be deployed in areas with favorable wind, wave, and oceanographic conditions. This paper presents a comprehensive analysis of European floating structures intended for hybrid renewable energy applications, combining environmental assessment, structural characteristics, hydrodynamic behavior, and energy integration aspects. Unlike previous analyses, which focused primarily on individual technologies, this study offers an integrated perspective on floating platform concepts—including spar, semi-submersible, tension-leg, barge, and FPSO-based solutions—as well as their potential for hybrid energy systems. The analysis shows that platform stability, motion response, and structural adaptability are critical factors affecting energy performance and operational reliability. Furthermore, the analysis highlights that hybrid configurations combining offshore wind, wave, and solar energy with energy storage technologies represent promising pathways toward more autonomous and sustainable offshore infrastructure. Key challenges related to design optimization, environmental loads, and system integration are also identified to support future developments in European offshore renewable energy. Full article
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