How is the electricity grid stabilized with batteries?

In agreement with the operators of neighboring countries, Elering must ensure that the difference between consumption and production does not exceed 30 MW (imbalance). Why is this important? Explained in a simplified way, when consumption starts to exceed production, the frequency of the power grid (50Hz) starts to decrease, and when production exceeds consumption, the frequency of the power grid starts to rise. If the frequency falls below the critical limit, there is a risk of the power grid collapsing (the generators slow down and turn off). If the frequency rises above a critical limit, this can also be accompanied by the risk of shutting down network equipment.

Storage solutions based on batteries can be used either as an additional producer or as an additional consumer when such a change in network frequency occurs.