Definition
System services are the technical services that StatnettNorway's system operator for the transmission grid - owns and operates the high-voltage network and operates Elhub. procures to maintain the quality and stability of the power systemThe totality of facilities, lines and systems for producing, transmitting and distributing electrical energy.. The most important are: frequency control (FCR, aFRR, mFRR), which keeps the frequency at 50 Hz by rapidly adjusting generation or consumption; voltage regulation, which ensures correct voltage levels in the grid via reactive power from generators; and short-circuit power, which provides resilience against faults. With more solar and wind power in the system - which have no rotating mass - the system's natural inertia is reduced. This makes frequency regulation more demanding and increases the value of fast response. System services are compensated through dedicated markets and capacity payments. Aggregators that pool flexibilityAbility to change power consumption or production in response to price signals or system operator needs. from industry, EV chargers and batteries are growing providers of FCR and aFRR. IT requirements for system services are stringent: response within seconds, real-time measurement and accurate documentation for settlementTurning metering data into money. Consumption and production per metering point become what each party owes or is owed..