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Datasets (117)
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Constraint management
The number of voltage machine required for a given voltage group for upcoming weekend and following Monday to Friday. Given the complexity and locational nature of the voltage requirement, the actual…
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System
This dataset gives indicative information on the availability and utilisation of Stability Pathfinder contracts. The information is provided at a settlement period resolution for all contracted units…
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Ancillary services
This dataset sets out the Short Term Operating Reserve (STOR) committed windows from Season 15 to Season 19 applicable from 1 April 2021 to 1 April 2026. These seasons define the committed windows…
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System
This page holds the historic system frequency data for Great Britain at a 1 second resolution. It is the role of the National Grid ESO to keep the system frequency at 50 Hz, with a statutory limit of…
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Balancing costs
The publication consists of constraint breakdown information to provide additional transparency of why as ESO we are taking actions on the system. Please note that tags applied to actions can…
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Constraint management
Thermal constraints are taken when the amount of energy that would flow naturally from one region to another exceeds the capacity of the circuits connecting the two regions. This dataset provides…
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Demand
This dataset contains incremental updates for 2-52 weeks ahead demand forecast. The forecast assist the industry to make efficient decisions in balancing their supply and demand positions.
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Ancillary services
Quick Reserve, separated into Negative Quick Reserve (NQR) and Positive Quick Reserve (PQR), is aimed primarily for reacting to pre-fault disturbances to restore the energy imbalance quickly and…
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Ancillary services
This dataset will contain our forecasted requirements for Static Firm Frequency Response.
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Ancillary services
This dataset will contain our forecasted requirements for Dynamic Regulation.