Beyond Conventional Rectification: Flexible Power Conversion for the Next Generation of Energy Infrastructure

As Europe accelerates the deployment of renewable energy, the challenge is no longer only generating sufficient clean electricity. Equally important is ensuring that industrial energy users can operate efficiently within a power system that is becoming more dynamic, decentralized, and constrained. Large electricity consumers such as hydrogen electrolysers increasingly face grid congestion, fluctuating renewable generation, and stricter requirements for power quality and grid interaction. Addressing these challenges is a key objective of the Cynergy4MIE project, which explores how power-electronics technologies can improve the flexibility and resilience of future energy infrastructure.

One of the less visible but essential components in this transition is power conversion. Technologies such as electrolysers require large amounts of stable DC power, while electrical grids supply AC power under continuously changing conditions. Traditionally, rectifier systems were designed primarily to convert electricity efficiently at a fixed operating point. However, future industrial infrastructure requires much greater adaptability. Equipment lifetimes often exceed twenty years, while grid conditions, operating profiles, and process technologies evolve continuously over the same period.

Within the Cynergy4MIE project, development activities focus on modular Silicon Carbide (SiC) based power-conversion architectures, exemplified by the Hydra rectifier platform. Instead of treating the rectifier as a single monolithic asset, the system is built from independently controllable power-conversion modules. This modular approach allows systems to be scaled incrementally, maintaining high efficiency over loads, and to be adapted to different voltage and power requirements. Such flexibility is particularly relevant in hydrogen production, where electrolyser technologies vary considerably and are expected to continue evolving. The same challenge is emerging in adjacent markets, including high-voltage data-centre infrastructure, battery-storage systems, and other energy-intensive industrial applications.

Beyond modularity, advanced control helps mitigate grid issues like total harmonic distortion, power factor deviations and voltage drops. These capabilities create opportunities to better utilize available grid capacity, respond to changing operating conditions, and support stable system performance without compromising process requirements. As renewable penetration increases, such dynamic behaviour becomes increasingly valuable for both infrastructure operators and grid operators.

Within Cynergy4MIE, Prodrive Technologies B.V. contributes expertise in high-performance power electronics and intelligent energy-conversion systems. A central focus is the development of modular Silicon Carbide (SiC) based rectifier technology for large-scale DC applications. The resulting Hydra rectifier platform and Typhon turnkey solution are designed to convert medium-voltage grid power into the controlled DC power required by electrolysers and other high-power electrical loads. Unlike conventional rectifier systems, Hydra is built around modular 250 kW power-conversion units that can be combined, controlled, and operated as a flexible system. This architecture provides a practical research platform for investigating how modularity, advanced control, and high-efficiency SiC technology can improve the adaptability of future industrial energy infrastructure. Importantly, these concepts are no longer limited to simulation or laboratory-scale validation. Testing at a dedicated 4 MW hydrogen power-conversion facility (1) has demonstrated operation of the modular architecture under representative industrial conditions, providing valuable insights into efficiency, dynamic behaviour, scalability, and grid interaction at power levels relevant for future commercial hydrogen installations.

https://prodrive-technologies.com/en/about-us/news/prodrive-technologies-inaugurates-4mw-green-hydrogen-rectifier-test-facility/

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