What is Grid Energy Storage?

Grid energy storage are methods used for energy storage on a large scale within an electrical power grid.

The percentage of electricity generated from renewables is increasing.

The lack of supply from these sources, can pose a threat to the continuity of supply to homes and businesses. To ensure a constant supply (including a frequency of 50 Hertz) it is necessary to finely balance the energy supply and demand.

A short term shortage occurs if the sun suddenly goes behind the clouds, or the wind stops blowing. When this is coupled with regular early evening surge in demand, it creates a real energy crunch.

Nevertheless, Grid energy storage solutions are becoming more and more common. Effectively acting as a buffer. Providing a short term additional capacity, whilst longer term energy sources (e.g. STOR diesel generators and gas power stations) come online.

To keep the grid operational, electricity has to be stored for times when demand exceeds supply. Demand is sometimes greatest when the wind isn’t blowing or the sun isn’t shining.

 

grid frequency control- Grid Energy Storage

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