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.
Sign in to subscribe and receive the latest updates
130 Data Files
| Name | Format | Last Changed Sort ascending | Download | Explore |
|---|---|---|---|---|
| June 2021 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| May 2021 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| April 2021 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| March 2021 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| February 2021 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| January 2021 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| December 2020 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| November 2020 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| October 2020 - Historic Frequency Data | CSV | 1 year ago | Download (CSV) | view |
| September 2020 - 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/bd754692-bce7-43b7-ba25-813921476391/download/fnew-2021-6.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/625597eb-7364-4ba8-a306-a7f59dcdc2a7/download/fnew-2021-5.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/bd6e1b3f-1abb-452c-813c-397a41f7af8d/download/fnew-2021-4.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/ac4e4031-0f86-48ff-8ecd-147d51ffbb81/download/fnew-2021-3.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/53e2be31-c68c-40b3-bb83-7ae12240107c/download/fnew-2021-2.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/fe2502b8-7fef-4027-8399-550a0c84f415/download/fnew-2021-1.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/706ec5fe-777a-4a46-90de-b9089f93853c/download/fnew-2020-12.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/bcfa7999-1b14-444b-8f8f-6402092a0e9d/download/fnew-2020-11.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/3617f1af-4d3c-45d3-a1f6-0d51a9c2167b/download/fnew-2020-10.zip
curl -L https://api.neso.energy/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/cfc880fe-3d3d-4df4-bf4f-9294a4dbc901/download/fnew-2020-9.zip