Who can participate?
| |
Generation |
Demand |
| BMU |
n/a |
n/a |
| Non-BMU |
n/a |
yes |
Service Description
Frequency Control Demand Management (FCDM) provides frequency response through interruption of demand customers. The electricity demand is automatically interrupted when the system frequency transgresses the low frequency relay setting on site. The demand customers who provide the service are prepared for their demands to be interrupted for a 30 minute duration, where statistically interruptions are likely to occur between approximately ten to thirty times per annum.
Why is it needed?
FCDM is required to manage large deviations in frequency which can be caused by, for example, the loss of significantly large generation. The service is a route to market for demand-side providers, and compliments other non-dynamic service provisions.
Major Technical Requirements
A FCDM provider must:
- Provide the service within 2 seconds of instruction
- Deliver for minimum 30 minutes
- Deliver minimum 3MW, which may be achieved by aggregating a number of small loads at same site, at the discretion of National Grid
- Have suitable operational metering
- Provide output signal into National Grid’s monitoring equipment.
Procurement Process
Due to the bespoke nature of service provision, this service is provided through bilateral negotiations with providers.
National Grid provides FCDM computer equipment, tests and commissions once the Site/Agent has installed the Tripping Relay Equipment and Communication Router. Once the test has been completed, a Site can join the scheme subject to signing the FCDM Ancillary Service Agreement.
Once a provider has agreed terms they are required to declare availability for each Settlement Period on a weekly basis. National Grid then will determine whether to accept this availability.
Payment
Payment Structure: For each site where Availability has been accepted by National Grid in a Settlement Period, an Availability Fee (£/MW/h) is paid against the Metered Demand in the Settlement Period of the site specified in the Agreement.
BSAD: Not Applicable
ABSVD: ABSVD is optional for FCDM providers. Utilisation volumes may be determined in accordance with system frequency and the characteristic of the response service.