According to the Spanish regulation first established in RD 1454/2005, subsequently in RD 661/2007 and ratified by Royal Decree 413/2014, facilities with a power capacity greater than 1 MW are obliged to be registered and sign up (connect to) with a Generation Control Centre (GCC) qualified by the system operator (SO) in non-peninsular territories. RD 413/2014 establishes that as of June 1, 2015 this power capacity limit is reduced to 0.5 MW. Therefore, Red Eléctrica, through its control centres, monitors and controls production from renewable generation facilities, or groups of facilities, with a power capacity larger than 0.5 MW.
Through the generation control centres (qualified by the system operator as interlocutors with the system operator with sufficient control, command and monitoring capacity to act as aggregators of information), the control centres of Red Eléctrica receive every 12 seconds (maximum allowed), real-time information regarding each facility through real-time telemetry regarding the connection status, the production of both active and reactive power, as well as the voltage at the connection point.
All this information is collected by the control system of Red Eléctrica de España making it accessible to the operator 24 hours a day, every day of the year, thus allowing real-time analysis of the current scenario to be performed, foresee operational measures necessary for the system to remain in a safe state and issue, if unacceptable situations in the system are detected, orders to non-manageable renewable generation facilities limiting their production and that must be fulfilled within the specified time limits.
In this way, increased integration of renewable energy into the system is being made possible thanks to Red Eléctrica’s control centres, therefore reducing the amount of CO2 emissions into the atmosphere and allowing demand to be covered by using intermittent renewable energies, without jeopardizing the security and quality of supply.