Forecast volumes and costs
On this page we provide a breakdown of operating margin (OPMR), based on forecast volume of reserve, forecast volume of frequency response required, annual weighting factors for STOR contracts, and forecasts of BSUoS charges.
Frequency response requirement documents are now on the System balancing reports page.
You can find out more about the balancing services incentive scheme (BSIS) and balancing services use of system (BSUoS) on their respective pages.
BSUoS
Daily BSUoS Forecast 2018-19
Daily BSUoS Forecast 2017-18
Monthly BSUoS Forecast
Margin requirements
Reserve requirement (OPMR)
NRAPM forecast
The purpose of the Negative Reserve Active Power Margin (NRAPM) forecasting report is to indicate to the market a risk of NRAPM situation and therefore risk of Emergency Instructions.