The obligatory reactive power service (ORPS) is the provision of varying reactive power output. At any given output generators may be requested to produce or absorb reactive power to help manage...

Firm Frequency Response (FFR) market information reports on the FFR requirement for two months ahead of the publishing month, as well as information on the contracts due to provide in the month...

The Firm Frequency Response (FFR) post tender reports are published following each monthly tender. They indicate which tenders were accepted and rejected and the information submitted for these...

Fast Reserve provides the rapid and reliable delivery of active power through an increased output from generation or a reduction in consumption from demand sources, following receipt of an electronic...

If demand ends up being greater than forecast, or there is unforeseen generation unavailability, extra sources of power may be needed to manage the system. One form of reserve that is used to manage...

In our role as Electricity System Operator (ESO), we balance generation and demand in real time. When demand is low, there may be a requirement for additional flexibility to balance generation and...

If demand ends up being greater than forecast, or there is unforeseen generation unavailability, extra sources of power may be needed to manage the system. One form of reserve that is used to manage...