EU backing for modular 2.5 MW platform targets integrated conversion

The European Commission has awarded up to 39.3 million euros from its Innovation Fund to support the industrial manufacturing of an integrated medium-voltage conversion platform. The project centres on industrialising a modular 2.5 MW unit that couples medium-voltage alternating-current networks directly to direct-current systems, incorporating the functions of step-down transformers, switchgear, rectifiers, and harmonic filters within a unified power interface.

Substation and balance-of-plant architecture for renewable generation, battery storage, and electrolyser facilities typically relies on discrete equipment blocks. A standard installation demands medium-voltage switchgear, a dedicated step-down transformer, and external power-conversion cubicles, interconnected by extensive cabling. This decentralised arrangement inflates civil engineering requirements, extends on-site installation schedules, and introduces multiple termination and busbar interfaces where insulation degradation, moisture ingress, or thermal cycling can trigger operational faults.

Integrating magnetic transformation and solid-state conversion into a standardised 2.5 MW building block addresses several footprint and layout constraints. For hydrogen electrolysers and large-scale battery storage facilities, where direct-current busbars demand massive current at low or intermediate voltages, locating conversion hardware close to the stack reduces resistive losses and cabling bulk. Modular architectures also offer scalability, enabling project developers to parallel multiple units rather than engineering bespoke medium-voltage transformers for each development phase.

However, moving from passive, oil-immersed or dry-type transformers to an integrated electronics platform redistributes risk across the plant. Classical iron-core transformers offer decades of proven overload tolerance and operational robustness under severe grid transients, whereas solid-state power components depend heavily on complex thermal management, active cooling circuits, and high-speed semiconductor protection. Engineering teams must therefore evaluate whether the operational availability of tightly coupled conversion blocks can match the multi-decade lifespans of conventional substation equipment in harsh ambient environments.

What this means for asset owners in the Balkans and the Black Sea region: Developers and network operators in Croatia managing renewable collector substations and storage connections face acute supply-chain bottlenecks and extended lead times for conventional medium-voltage plant. Adopting packaged 2.5 MW conversion units can significantly shorten on-site installation windows and reduce substation civil footprints. Nevertheless, procurement teams must ensure that modular power electronics provide sufficient fault-ride-through resilience and thermal margins during extreme summer heat to avoid unexpected forced outages.