Dutch battery-flywheel energy project handed over01 September 2020

Energy storage company Leclanché and S4 Energy has completed and handed over an innovative hybrid energy storage project for energy management provider S4 Ancillary Services in Almelo, The Netherlands

The project is an extension of an earlier pilot system created by Leclanché and S4 Energy. The overall system, now in operation, is a combination of Leclanché lithium-ion battery storage technology coupled with S4 Energy‘s flywheel storage to provide primary control power for frequency stabilization to TenneT, the local transmission grid operator.

The combination with the fast-responsive flywheels reduces the energy throughput and amount of cycles of the Li-ion batteries and ensures an improved usage profile and longer system lifetime.

The 8.8 MW capacity battery system provides 7.12 MWh of stored renewable energy. Coupled with six of S4 Energy’s proprietary KINEXT flywheel storage systems which deliver 3MW of power, it will help improve the reliability of the grid, protecting it against the fluctuations caused by the intermittency of renewable energy generation.

Pairing flywheels with a battery energy storage system will help prolong the lifetime of the batteries to a minimum of 15 years and bring additional value to TenneT.

William Dalrymple

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