The aim of cFlex is to tap unused flexibilities in cellular organized prosumer communities as a collective system(-network) or as services to enable increased use of renewable energy sources in the distribution network and to coordinate production, storage, and consumption over long periods and regions. For this purpose, the cooperative bundling of different prosumers, network segments, and regions within (regional) Local Energy Communities (R / LECs) aims to optimize the overall state of the energy grid. By applying a cellular control approach including data-based analysis as well as neural forecasting models balancing mechanisms between energy supply and demand can be activated automatically at different network levels.

The Department of Integrated Sensor Systems contributes expertise in distributed control systems. The main tasks are the development of use cases, the definition of interfaces and the implementation of control concepts to optimize the energy flow in energy communities for the benefit of its participants and to support the power grid to avoid supply bottlenecks on the local level. Recently, the department published a technical framework on Local Energy Communities at IES to provide standardization.

** The project cFlex is partially co-funded by FFG and Klima- und Energiefond within the 5. Call 2018 of the program Energy Research (e!MISSION), Energy Research.


Duration 01/09/2019 - 28/02/2023
Funding FFG
Program Energieforschungsprogramm

Department for Integrated Sensor Systems

Center for Distributed Systems and Sensor Networks

Principle investigator for the project (University for Continuing Education Krems) Priv.-Doz.Dipl.-Ing.Dr. Thilo Sauter
Project members Dipl.-Ing. Dr. Gerald Franzl Dipl.-Ing. Albert Treytl


Franzl, G.; Wanzenböck, C.; Berger, A. (2023). Interoperability as a Key Factor for Digitalization – a Success Story for Cross-Sector Knowledge Transfer. In: OVE, Proceedings in ComForEn 2023: 1-12, OVE, Wien

Franzl, G.; Reisinger, T.; Hödl-Holl, M. (2023). Technical Framework on Local Energy Communities (TF-LEC) Vol.2 Edition 0.5. reposiTUm:, TU Wien, online, DOI: 10.34726/3882

Efkarpidis. N.; Goranovic, A.; Yang, C.; Geidl, M.; Herbst, I.; Wilker, S.; Sauter, T. (2022). A Generic Framework for the Definition of Key Performance Indicators for Smart Energy Systems at Different Scales. Energies 2022, Vol. 15, Iss. 4: 1289

Franzl, G.; Wilker, S.; Efkarpidis, N.; Sauter, T. (2022). Situation Awareness by Simple Intuitive Traffic Light Signals for Smart Utilisation of Local Demand and Supply Flexibility. Energies MDPI, Vol. 15: 1-21

Efkarpidis, N.; Geidl, M.; Yang, C.-W.; Goranovic, A.; Wilker, S.; Sauter, T.; Herbst , I. (2022). A Robust KPI Framework for Smart Energy Systems of Different Scales. In: IEEE, Proceedings in 2022 IEEE 31st International Symposium on Industrial Electronics (ISIE): 1-8, IEEE, Anchorage, USA

Franzl, G.; Leopold, T.; Wilker, S.; Sauter, T. (2021). Flexibility Offering and Rating for Multi-objective Energy Balancing. In: IEEE, 2021 26th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA ) proceedings: 10.1109/ETFA45728.2021.9613188, IEEE, Vasteras, Sweden

Leopold, T.; Bauer, V.; Brathukin, A.; Hauer, D.; Wilker, S.; Franzl, G.; Mosshammer, R.; Sauter, T. (2021). Simulation-based methodology for optimizing Energy Community Controllers. In: IEEE, 2021 IEEE 30th International Symposium on Industrial Electronics (ISIE) proceedings: 10.1109/ISIE45552.2021.9576277, IEEE, Kyoto, Japan

Franzl, G.; Wilker, S. (2021). Technical Framework on Local Energy Communities (TF-LEC) Vol.1 Version 0.5. E384-01 - Forschungsbereich Software-intensive Systems, reposiTUm: 10.34726/722, TU Wien, online, DOI: 10.34726/722

Korner, C.; Gavriluta, C.;Pröstl Andrén, F.; Meisel, M.; Sauter, T. (2020). Impact of communication latency on distributed optimal power flow performance. Energy Informatics, Vol. 3: 13

Franzl, G.; Goranovic, A.; Wilker, S.; Sauter, T.; Treytl, A. (2020). Initiating an IES based Technical Framework on Local Energy Communities. In: IEEE, Proceedings of the 2020 25th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA): 1131-1134, IEEE, Wien

Hauer, D.; Diwold, K.; Schuss, M.; Krammer, L.; Sauter, T. (2020). Plug & Play Monitoring for Distribution Substations. In: IEEE, 2020 IEEE International Conference on Industrial Technology (ICIT) - proceedings: 624-629, IEEE, Argentinien

Howind, S.; Bauer, V.; Wendt, A.; Franzl, G.; Sauter, T.; Wilker. S. (2020). Prosumer and Demand-Side Management Impact on Rural Communities’ Energy Balance. In: IEEE, Proceedings of the 2020 25th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA): 768-773, IEEE, Wien


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Project coordinator

Technische Universität Wien


Project partner

Donau-Universität Krems

nymea GmbH

PowerSolution Energieberatung GmbH

SOLAVOLTA Energie- und Umwelttechnik GmbH

Sonnenplatz Großschönau GmbH

Spotty Smart Energy Partner GmbH

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