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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121 Data Files

Last Changed
Format
Name Format Last Changed Sort ascending Download Explore
January 2024 – Historic Frequency Data CSV 3 weeks ago Download (CSV) view
December 2023 – Historic Frequency Data CSV 1 month ago Download (CSV) view
November 2023 – Historic Frequency Data CSV 2 months ago Download (CSV) view
October 2023 – Historic Frequency Data CSV 3 months ago Download (CSV) view
September 2023 – Historic Frequency Data CSV 4 months ago Download (CSV) view
August 2023 – Historic Frequency Data CSV 5 months ago Download (CSV) view
July 2023 – Historic Frequency Data CSV 6 months ago Download (CSV) view
June 2023 – Historic Frequency Data CSV 7 months ago Download (CSV) view
May 2023 – Historic Frequency Data CSV 8 months ago Download (CSV) view
April 2023 – Historic Frequency Data CSV 8 months 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 National Grid ESO Open Data Licence
Update Frequency Monthly

cURL integration

Copied

# Get a list of dataset's resources

curl -L -s https://api.nationalgrideso.com/api/3/action/datapackage_show?id=system-frequency-data | grep path

# Get resources

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/79c707ac-dcd6-4f08-80e3-10a6ba92647c/download/fnew-2024-1.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/146e3d50-6e53-48d9-a831-d7c25304d102/download/fnew-2023-12.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/1f17159a-df91-48ef-a3d5-02da75e4196a/download/fnew-2023-11.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/530d18c9-01bc-4620-9911-0d03c7152081/download/fnew-2023-10.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/66487376-67f5-46bd-a508-442e7761f51c/download/fnew-2023-9.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/b530feae-96b1-4f4a-94e1-6c6dee681229/download/fnew-2023-8.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/7e38448c-e482-46fe-b30e-cde1da30cf8d/download/fnew-2023-7.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/2b881e0a-44b4-4957-9cc3-89bf0df6247a/download/fnew-2023-6.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/66c7be67-9689-4578-bc8d-684a2dea8248/download/fnew-2023-5.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/83fc86bb-50d6-4965-91fb-ddbdd02a5190/download/fnew-2023-4.csv

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