Daily & Weekly NRAPM (Negative Reserve Active Power Margin) Forecast
Summary
NESO publishes daily and weekly forecasts of Negative Reserve Active Power Margin (NRAPM), warning when insufficient flexibility exists to balance the system during low demand periods. The forecasts cover 2-14 days ahead daily and 2-52 weeks ahead weekly for both national and Scottish systems. NRAPM warnings indicate risk of Emergency Instructions being issued to generators.
Why it matters
This data release provides market intelligence on system flexibility constraints but does not change market rules or costs. As such, it serves as an early warning system that allows generators to prepare for potential emergency instructions during periods when renewable output may exceed demand and insufficient downward flexibility exists.
Key facts
- •Daily forecasts: 2-14 days ahead
- •Weekly forecasts: 2-52 weeks ahead
- •Covers both national and Scottish systems
- •Warns of Emergency Instructions risk
Areas affected
Memo
This dataset contains NRAPM (Negative Reserve Active Power Margin) forecast for Daily 2-14 days ahead and Weekly for 2-52 weeks ahead for both National and Scotland. The purpose of the NRAPM forecast is to indicate to the market a risk of NRAPM situation and therefore risk of Emergency Instructions. The insufficient NRAPM warning (Negative Reserve Active Power Margin) is a request to encourage more flexible parameters from generators, and inform participants of a risk of emergency instructions. A system NRAPM may be issued if there is insufficient flexibility available to ensure that generation matches demand during low demand periods.