Glossary

Feed-in management (FIM) refers to the intentional reduction of electricity fed in from renewable energies during grid operation depending on the current situation in order to eliminate grid congestion and ensure system stability.

Feed-in or withdrawal points are grid connection terminals where electrical energy is either fed-in or withdrawn from the system.

See converter.

Frequency stability refers to the stabilisation of frequency deviations which result from imbalances between feed-in and withdrawal (active power regulation) and is carried out in power plants using primary and secondary control as well as tertiary control (minutes reserve). The electricity transmission grid in Germany and Europe has a frequency of 50 Hertz. The transmission system operators (TSOs) must keep this frequency as constant as possible at all times with only a small tolerance for deviation.