Large-Scale Electricity Storage

A large-scale electricity storage system is a large-dimensioned electricity storage system on a megawatt scale. It absorbs electrical energy and makes it available again when required – either for the electricity grid or for large energy applications.

Classification within the electricity system

Large-scale electricity storage systems are used above all where large amounts of energy have to be stored flexibly and released again quickly. In practice, these are often large battery storage systems that are operated directly at grid level and therefore often count among the grid-scale battery storage systems.

Typical applications

Large-scale electricity storage systems perform central tasks in an increasingly flexible energy system:

• Balancing of electricity fluctuations
• Integration of solar and wind energy
• Stabilisation of the grid frequency
• Provision of balancing energy
• Bridging of grid bottlenecks

Role in grid stability and balancing energy

Thanks to their fast response capability, large electricity storage systems are particularly suitable for providing primary control reserve and secondary control reserve. They can absorb or release energy within a very short time and thus balance frequency deviations in the grid.

Significance for the energy transition

With the increasing share of volatile renewable energies, the need for large, fast-responding storage systems is growing. Large-scale electricity storage systems help to absorb electricity surpluses, provide them at a later time and thus support a secure and stable energy supply.

Frequently Asked Questions (FAQs)

What is a large-scale electricity storage system?

A large-scale electricity storage system is a large-dimensioned electricity storage system on a megawatt scale that absorbs electrical energy and makes it available again when required.

What are large-scale electricity storage systems used for?

Large-scale electricity storage systems are used for grid stabilisation, the integration of renewable energies, the provision of balancing energy and the balancing of electricity fluctuations.

How do large-scale electricity storage systems differ from smaller storage systems?

Large-scale electricity storage systems operate on a megawatt scale and perform system-relevant tasks in the electricity grid, whereas smaller storage systems are usually operated behind the grid connection of individual companies or buildings.

Why are large-scale electricity storage systems important for renewable energies?

Large-scale electricity storage systems can absorb electricity surpluses from solar and wind energy and feed them back in later. This helps to balance the volatile feed-in from renewable energies.

Can large-scale electricity storage systems provide balancing energy?

Yes. Large-scale electricity storage systems can provide primary and secondary control reserve and thus contribute to stabilising the grid frequency.

What role do large-scale electricity storage systems play in the energy system?

Large-scale electricity storage systems increase flexibility in the electricity system, balance grid bottlenecks and support a secure energy supply with a high share of renewable energies.