Energy Storage & Grid Balancing
“Managing the wide-scale introduction of intermittent renewable energy sources into electricity transmission networks is essential for ensuring the stability and flexibility of the grid, especially in an HVDC context. Innovative, hybrid storage solutions will enable us to do this.”
Sylvain Grillet, Department Director – Energy Storage & Grid Balancing
To support the integration of renewable energies within the European electricity network, the Energy Storage & Grid Balancing department adapts and develops hydraulic storage solutions based on the use of pumped storage plant (PSP) technology.
Because wind and solar energy are highly variable, using them on a wide scale requires massive and reactive means of storage. Although hydraulic storage is a mature technology – today it represents 97% of electrical energy storage worldwide – it must be significantly adapted to meet the challenges of the energy transition.
We focus on adapting conventional or variable speed pump turbines and improving their hydraulic characteristics. We also study the hybridisation of PSPs with other means of storage, exploring the economics of ancillary services.
SuperGrid Institute’s hydraulic platform makes it possible for us to test every kind of reversible pump turbine in all four quadrants, gathering data on efficiency, cavitation and dynamic behaviour according to IEC 60193 standard requirements.
Another platform, HydroPHIL, simulates the performance of hydroelectric dams. It focuses on hydraulic transitions within the power grid and, more generally, on unsteady regimes associated with the operation of hydraulic turbines: power build-up, start-ups, shutdowns, etc.
Recent publications
Electric Field Measurement in Gas-Solid Insulation System under Lightning Impulse
The insertion of a dielectric barrier between the conductors in gas insulation can improve effectively the insulation performance in high voltage equipment such as MV gas insulated switchgear.
Endurance Test on Nomex 410 to Assess Partial Discharge Activity under High dv/dt Square Voltage
Using endurance testing and UHF-based measurements, this study analyses partial discharge activity in Nomex 410 insulation exposed to high dv/dt square voltage and its impact on insulation lifetime in medium-frequency transformers.
The Value of Battery Hybridization for Small Hydropower Plants: A Sensitivity Analysis on Plant Design
This paper presents a techno-economic assessment of battery hybridization for small run-of-river hydropower
