System Frequency
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 0.5 Hz above or below this value.
Time values are all given in Greenwich Mean Time (GMT) starting January 2020.
NOTE: Due to the size and format of these files, to view the data, please download the CSV file and open it with Notepad++ for complete document loading.
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130 Data Files
| Name | Format | Last Changed Sort ascending | Download | Explore |
|---|---|---|---|---|
| January 2024 – Historic Frequency Data | CSV | 9 months ago | Download (CSV) | view |
| December 2023 – Historic Frequency Data | CSV | 10 months ago | Download (CSV) | view |
| November 2023 – Historic Frequency Data | CSV | 11 months ago | Download (CSV) | view |
| October 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| September 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| August 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| July 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| June 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| May 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| April 2023 – Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
Additional Information
| Field | Value |
|---|---|
| Creator | National Grid Electricity System Operator |
| Date Created | November 5, 2019 at 11:50 AM (UTC+00:00) |
| Source | National Grid Electricity System Operator |
| Rights | NESO Open Data Licence |
| Update Frequency | Monthly |
cURL integration
# Get a list of dataset's resources
curl -L -s https://api.neso.energy/api/3/action/datapackage_show?id=system-frequency-data | grep path
# Get resources
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/79c707ac-dcd6-4f08-80e3-10a6ba92647c/download/fnew-2024-1.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/146e3d50-6e53-48d9-a831-d7c25304d102/download/fnew-2023-12.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/1f17159a-df91-48ef-a3d5-02da75e4196a/download/fnew-2023-11.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/530d18c9-01bc-4620-9911-0d03c7152081/download/fnew-2023-10.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/66487376-67f5-46bd-a508-442e7761f51c/download/fnew-2023-9.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/b530feae-96b1-4f4a-94e1-6c6dee681229/download/fnew-2023-8.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/7e38448c-e482-46fe-b30e-cde1da30cf8d/download/fnew-2023-7.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/2b881e0a-44b4-4957-9cc3-89bf0df6247a/download/fnew-2023-6.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/66c7be67-9689-4578-bc8d-684a2dea8248/download/fnew-2023-5.csv
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/83fc86bb-50d6-4965-91fb-ddbdd02a5190/download/fnew-2023-4.csv