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HyLeiT
The joint project HyLeiT is part of the BMBF flagship project H2Giga, which deals with the series production and scale-up of water electrolysers. Within H2Giga, HyLeiT covers the interdisciplinary topic “electrical hydrogen system technology”. Central research topics are cost-optimized system and power converter technology as well as the grid integration of electrolysis plants for the production of green hydrogen. The BMBF project HyLeiT is coordinated by the Fraunhofer Institute for Energy Economics and Energy System Technology IEE in Kassel.
Date: 26.09.2025 9:00 – 12:30
Topic: System Technology and Grid Integration of Hydrogen Plants
The joint project HyLeiT is part of the H2Giga flagship project, which is funded by the BMFTR and deals with the industrialization and scaling up of water electrolysis. Within H2Giga, HyLeiT deals with the interdisciplinary topic of “electrical hydrogen system technology.” The HyLeiT consortium consists of Fraunhofer IEE, SMA Solar Technology AG, the Technical University of Dresden, the Hochschule Bonn-Rhein-Sieg and Infineon Technologies AG. The consortium focuses on the power supply and grid integration of electrolyzers.
The project began in April 2021 and will conclude in September 2025. A public workshop will be organized at the end of the project to present the work carried out and the results achieved. HyLeiT focuses on the electrical system technology of electrolysis plants, particularly the converter technology between the grid and the electrolyzer. The goal is to reduce costs of power electronics and improve the reliability and grid compatibility of electrolysis plants. To this end, the partners are developing a specially adapted, optimized converter technology that uses application-specific, optimized silicon carbide (SiC) power semiconductors.
To test and optimize the converters in a system context, simulation models that can operate in real time are being created for the power grid and the electrolysis stacks. These models contribute to a “Power-Hardware-in-the-Loop (P-HIL)” platform that enables testing of the developed converter concepts under various grid conditions and stack configurations. Additionally, real-time electrochemical models of electrolysis cells can accurately simulate their performance and aging characteristics of the cells under different operating conditions.
Furthermore, the electrical connection technology in electrolysis rectifiers is being optimized to enhance efficiency and reliability. Particular attention is given to thermal design as well as to investigations of the contact characteristics and long-term behavior of the connection elements. These developments are accompanied by an investigation of novel protection concepts for electrical system technology. To increase the system’s robustness, faults must be reliably detected and resolved autonomously.
At the workshop, the HyLeiT consortium will present the project results along the entire chain from the grid to the rectifier and up to the electrolysis stack.
We warmly invite you to discuss these results and address further challenges and research needs for green hydrogen production.
HyLeiT
The joint project HyLeiT is part of the BMBF flagship project H2Giga, which deals with the series production and scale-up of water electrolysers. Within H2Giga, HyLeiT covers the interdisciplinary topic “electrical hydrogen system technology”. Central research topics are cost-optimized system and power converter technology as well as the grid integration of electrolysis plants for the production of green hydrogen. The BMBF project HyLeiT is coordinated by the Fraunhofer Institute for Energy Economics and Energy System Technology IEE in Kassel.
Date: 04.08.2025 13:00 – 15:30
Topic: Challenges of Electrolysis Systems at Relatively Weak Connection Points
Find the presentations below:
Introduction from the Organizer – Dr.-Ing. Mohammed Alsaadi, DERlab e.V., Germany
Workshop Opening – Dr. Norbert Henze, Fraunhofer IEE, Germany
Flagship Project H2 Mare – Thomas Schwabe, Siemens Gamesa Renewable Energy Deutschland GmbH, Germany
Green Hydrogen Electrolysers in Forming Future Grids – Power Electronics Perspective – Michael Fette, Fette Dynamics GmbH, Germany
Hydrogen Integration and its Implications for Weak Grid Infrastructure (cancelled due to illness) – Jakob Hainyemba, Namibia Energy Institute, Namibia
Grid Friendly Hydrogen – Alexander Unru, SMA Altenso GmbH, Germany
Impact of Renewable Hydrogen on the Power System: Sector Development, Flexibility and Market Aspects – Antonio Iliceto, CIGRE & ENTSO-E, Europe
Date: 23.06.2025 13:00 – 15:30
Topic: Grid Forming in Electrolysis Plants
Find the workshop presentations below:
Introduction from the Organizer – Dr.-Ing. Mohammed Alsaadi, DERlab e.V., Germany
Inertia from electrolyzers in transmission systems – Nils Wiese, Fraunhofer IEE, Germany
Grid-forming for Network Resilience: A System Restoration Case Study – Abdulraham Alassi, Iberdrola Innovation, Qatar, and Zhiwang Feng, University of Strathclyde, UK
Green Hydrogen electrolyzers in forming future grids – power electronics perspective – Abdelrahman Elhawash, INESC TEC and Porto University, Portugal
Grid-Forming Technology: Supporting the Transition to Resilient Power Grids – Abdulrahman Alassi, Iberdrola Innovation, Qatar
Date: 14.11.2024
Topic: “Modeling of Electrolysis Plants on Component and System Level”
Find the workshop presentations below:
Introduction from the Organizer – Dr.-Ing. Mohammed Alsaadi, DERlab, Germany
Workshop Introduction – Dr.-Ing. Norbert Henzen, Fraunhofer IEE (HyLeiT project coordination), Germany
System Support Services from Hydrogen Electrolysis Plants: Fundamentals and Modelling – Dr. Mehdi Ghazavi Dozein, Monash University, Australia
Grid Integration of Electrolyzers in the Power System – Nils Wiese, Fraunhofer IEE, Germany
H2-in-the-Loop: System level modeling of hydrogen energy storage plants – Nils Nemsow, KIT, Germany
Grid Code Compliance of Elecrolysis Systems: LVRT and PFAPR – Dr. Chao Liu, DTU, Denmark
Dynamic Modeling of Electrolyzers using the eCherry Library – Michael Rix, RWTH Aachen, Germany