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