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Super Stable Export Limit Contract Enactment
Super Stable Export Limit (SEL) is utilised to directly decrease the sum of the minimum MW level or SEL of generators synchronized to the system by lowering the minimum... -
Day Ahead Half Hourly Demand Forecast Performance
The historic half hourly day ahead national demand forecast as published via BM reports, alongside the outturn values, adjustments for TRIAD avoidance estimates and Absolute... -
Phase 2: FFR Auction Results Summary
As part of our work on developing our balancing services we ran a weekly trial auction for Firm Frequency Response. The weekly auction trial results and order hash data are... -
FES – Electricity Supply Data Table (ES1)
The Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs... -
Demand Flexibility Service: Test Events
Winter 2022/23 Data The Demand Flexibility Service (DFS) has been developed to allow the ESO to access additional flexibility when the national demand is at its highest –... -
24 Months Ahead Constraint Cost Forecast
This dataset contains the 24-month ahead constraint costs on a monthly basis for the main boundaries on the transmission system. These costs are the costs of managing constraint... -
Demand Flexibility Service: Live Events
Winter 2022/23 Data The Demand Flexibility Service (DFS) has been developed to allow the ESO to access additional flexibility when the national demand is at its highest –... -
FES – Flexibility Data table (FLX1)
The Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs is... -
Static Firm Frequency Response Requirement
This dataset will contain our forecasted requirements for Static Firm Frequency Response. -
Great Britain System Inertia Bid and Offer Costs
This dataset provides indicative values for the average daily price (in £ per GVAs) for BM accepted offers tagged as being for System Inertia. It also includes the cost of bid... -
National Demand Balancing Mechanism Units
This dataset contains a preliminary list of Balancing Mechanism units that make up National Demand. This is related to the Historic Demand Data published here -
Firm Frequency Response (FFR) Post Tender Reports
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... -
Daily Balancing Services Use of System (BSUoS) Cost Report
The BSUoS charge recovers the cost of day-to-day operation of the transmission system. Generators and suppliers are liable for these charges, which are calculated daily as a... -
FES – Whole System & Gas Supply - Emissions Data table (WS2)
The Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs is... -
FES – European Electricity Supply Data Table (ES2)
The Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs is... -
Index Linked Contracted Energy Volume
Index Linked Contract can be used by National Grid ESO to meet the voltage requirement. The contract is normally enacted in the morning ahead of the power exchange auction. The... -
FES – Natural Gas demand definitions Data table (ED4)
The Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs is... -
Daily Balancing Services Use of System (BSUoS) Forecast
This file contains the Electricity System Operator's (ESO) half-hourly BSUoS forecast (Balancing Services Use of System charge). The estimated BSUoS charge is calculated by... -
Regional breakdown of FES data (Electricity)
Long term electricity forecasts per region covering demand, demand side response and distributed generation based on our Future Energy Scenarios. Regions presented are Grid... -
FES – Whole System & Gas Supply Data table (WS1)
The Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs is...