WP3 – Grid forming for the synchronisation of large power systems by multi-service hybrid storage


In large power systems, synchronisation is traditionally achieved by conventional generation. Currently, solar and wind generation do not contribute to it, because their power-electronics interfaces “simply follow” the frequency signal provided by conventional generation. Therefore, large power systems with high share of renewables will require an active synchronisation service, supported by power-electronics units embedding advanced grid-forming control designed to maintain local frequencies tightly together across the synchronous zone, resulting in a frequency signal compatible with “simply-following” generation units. WP3 aims at demonstrating the technical feasibility of this service and at paving the way for its efficient economic implementation


More precisely, the objectives of WP3 are:

  • Enlarge a synchronisation control strategy designed in the MIGRATE project to multi-service control algorithms implementable on storage installation, to include other more classical services such as primary frequency response and congestion management.
  • Test the robustness of the synchronisation service to disturbances in current and voltage (large disturbances should induce smoothly saturated response, without disconnection).
  • Test the effectiveness of the synchronisation service in terms of reduction of local frequency deviation
  • Demonstrate the portability of the control strategies over different hardware platforms: fast battery storage versus hybrid storage composed of supercapacitors and standard battery, as well as different converter products.
  • Quantify synergies to be expected from multi-service, in terms of sizing of installations.
  • Identify the highest level of inverter control where the synchronisation control algorithm can be implemented, which is important for portability.

Partners involved: RTE, EPFL, Ingeteam

Key figures/key points

  • 2 demonstrators: 1 in EPFL, 1 connected to RTE’s grid
  • Proof of concept of the synchronisation service on a distribution and on a transmission system
  • Multi-service installations
  • Portability across multiple hardware architectures
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement n°773406