Daily operational planning margin requirement (OPMR)
OPMR is the amount of generation exceeding the demand forecast needed to meet our reserve requirement.
When assessing and publishing generation availability information against system requirements, the ESO includes an OPMR above demand forecast for 2-13 days ahead.
NOTE: As part of our ongoing efforts to align with data management best practices and improve consistency across datasets, the column ids in the below datafile will be updated on 17th September 2026 as follows:
- Daily Operational Planning Margin Requirement:
Maximum I/C Import → Maximum IC Import
Maximum I/C Export → Maximum IC Export
Operating Reserve provided by I/Cs → Operating Reserve provided by ICs
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1 Data Files
| Name | Format | Last Changed Sort ascending | Download | Explore |
|---|---|---|---|---|
| Daily Operational Planning Margin Requirement | CSV | Download (CSV) | view |
Additional Information
| Field | Value |
|---|---|
| Creator | National Grid Electricity System Operator |
| Date Created | December 10, 2019 at 3:37 PM (UTC+00:00) |
| Source | National Grid Electricity System Operator |
| Rights | NESO Open Data Licence |
| Update Frequency | Daily (Weekdays) |
cURL integration
# Get a list of dataset's resources
curl -L -s https://api.neso.energy/api/3/action/datapackage_show?id=daily-opmr | grep path
# Get resources
curl -L https://api.neso.energy/dataset/8e0c417f-ee54-4c8b-8ed2-0d64b042c6ed/resource/0eede912-8820-4c66-a58a-f7436d36b95f/download/csv_opmr_daily.csv