Survey on power system ancillary services

The technical requirements for ancillary services depend on the characteristics of the power system. The four regions provide a forecast, however, of the direction in which the ancillary services are developing. Technically, various additional grid services, such as frequency and voltage control, could be provided by almost all nuclear power plants, NPP, in the future, if an adequate market design is established.

Automatic and/or manual Frequency Restoration Reserve products may well be the best candidates for the ancillary services provided by NPPs in the Nordic countries. The Nordic NPPs can also participate in economic dispatch, redispatch and voltage regulation, and there are already various examples of such operation, e.g., Ringhals 1 in the summer of 2020, participated in voltage control for the Swedish grid system.