FAQs
Below is a list of our most frequently asked questions. If you have a question that isn't listed below, please contact us.
What is a Capacity Market Notice not?
A Capacity Market Notice is not a dispatch signal for Capacity Market participants to take specific action. Where the Capacity Market Notice is triggered by "Margin below threshold set out in Capacity Market Rules" this has been calculated and issued automatically using the latest data available from the industry for four hours ahead of the current time. Such data will be updated by industry participants closer to the relevant time and may result in challenges associated with the system margin improving.
Where the Capacity Market Notice is triggered by either a "Demand Reduction Instruction" or "Low Frequency Disconnection" National Grid ESO systems will communicate a Capacity Market Notice for four hours' time, where one is not already active.
Regardless of the trigger event for the Capacity Market Notice all industry participants are advised to make themselves aware of other operational information available to the industry (such as BM Reports).
Related FAQs
- What is a Capacity Market Notice and how is it triggered?
- What is included within a Capacity Market Notice when it becomes active on the website?
- What is included within the Demand figure?
- What is included within the Aggregate BM figure?
- How should I respond to a Capacity Market Notice?
- What other information is available to the industry?
- How do Capacity Market Notices differ to System Warnings messages that appear on the Balancing Mechanism Reporting Service (BMRS)?
- Will a Capacity Market Notice always be followed up by an operational System Warnings message?
- Is the Capacity Market Notice actively updated following its initial communication?
- Can a Capacity Market Notice be cancelled?
- Can a Capacity Market Notice be issued for any period less than four hours away?
- If a Capacity Market Notice is cancelled can one be reinstated as active at a later time from the same time?
- How many Capacity Market Notices will be published each year?