How is central control defined for FCR?

Central control is defined in Appendix 3 of the Balance Responsibility Agreement – FCR Terms and Conditions:

“Central control in this case refers to a unit or group providing FCR that is controlled by feeding the frequency back via a central function”.

This means that central control refers to resources that, in the operational phase, are dependent on a central function for activation. Examples of this are central frequency measurement and central setpoint calculation. Resources that are not dependent on a central function are considered to be locally controlled.

A resource can be considered locally controlled even if it uses a central function before the operating phase, such as for scheduling. This presupposes that any central signals are sent in good time before the delivery period and that the provider has the opportunity to verify that the signal has been received by the resource.

In order for a resource to be considered locally controlled despite the fact that central functions are used in the planning phase, it must be possible to notify Svenska kraftnät before the start of the delivery period should these central functions fail.