SONI074 DS3 System Services – Volume Capped – Gate 14

• Value: £3M

Primary Operating Reserve or 'POR' has the meaning given to it in the grid code

• Value: £3M

Secondary Operating reserve or 'SOR' has the meaning given to it in the grid code

• Value: £3M

Tertiary 1 operating reserve or 'TOR1' has the meaning given to it in the grid code.

• Value: £3M

Tertiary 2 operating reserve or 'TOR2' has the meaning given to it in the grid code

• Value: £3M

RR (De-synchronised)' means replacement reserve provided by the providing unit when: (i) not Synchronised to the power system in the case of a synchronous providing unit, or (ii) when connected to the power system and operating at a level less or equal to 0 MW in the case of an energy storage providing unit, or (ii) when connected to the power system in the case of a demand side unit

• Value: £3M

RR (Synchronised)' means Replacement Reserve provided by the Providing Unit when: (i) synchronised to the power system in the case of a synchronous providing unit, or (ii) when connected to the power system and operating at a level greater than 0 MW in the case of an energy storage providing unit or power park module. II.2.5) Award criteria

• Value: £3M

Steady-state reactive power or 'SSRP' means reactive power capability (Leading) and reactive power capability

• Value: £3M

Synchronous Inertial Response (SIR) is the kinetic energy (at a Frequency of 50 Hz) of a centrally dispatched synchronous providing unit multiplied by the SIR factor (SIRF)

• Value: £3M

Ramping Margin 1 is the increased MW Output and/or MW Reduction that a providing unit can provide to the company within one hour of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further two hours after the one hour period has elapsed. It is limited by the lowest availability in that three hour period.

• Value: £3M

Ramping Margin 3 is the increased MW Output and/or MW reduction that a providing unit can provide to the company within three hours of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further 5 hours after the 3 hour period has elapsed. It is limited by the lowest availability in that 8 hour period

• Value: £3M

Ramping Margin 8 is the increased MW Output and/or MW reduction that a providing unit can provide to the company within eight hours of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further 8 hours after the 8 hour period has elapsed. It is limited by the lowest availability in that 16 hour period.

• Value: £3M

Fast Frequency Response (FFR) is the additional MW Output or MW reduction required compared to the pre- incident MW output or MW reduction, which is fully available from a providing unit within 2 seconds after the start of an event and sustainable up to 10 seconds after the start of the event.