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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127 Data Files

Last Changed
Format
Name Format Last Changed Sort ascending Download Explore
August 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
July 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
June 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
May 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
April 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
March 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
February 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
January 2018 - Historic Frequency Data CSV 1 year ago Download (CSV) view
February 2023 – Historic Frequency Data CSV 1 year ago Download (CSV) view
January 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 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/c51be017-fa87-42c6-b818-1a192699d3eb/download/f-2018-8.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/bf45c11d-c787-4f84-8896-b14381f534c7/download/f-2018-7.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/2779f782-5938-4857-86d8-25350c2d4162/download/f-2018-6.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/215f0a52-d0dd-40ee-a103-6d14a5361e41/download/f-2018-5.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/4ebc55c9-7ad6-41e9-9154-b5769dbc17b8/download/f-2018-4.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/8e84b78f-8078-4188-965f-41685fd316bc/download/f-2018-3.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/ac669df9-1928-4a8c-9109-2494678f6c87/download/f-2018-2.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/eee0395e-7a8d-45c3-8f23-0e6c7e252c3e/download/f-2018-1.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/7a9b6d47-b2fd-4efe-bb41-f6e227b0786a/download/fnew-2023-2.csv

curl -L https://api.nationalgrideso.com/dataset/cb1cc925-ecd8-4406-b021-3a3f368196e1/resource/5da35567-ca7f-4127-861c-cc07d488fd2d/download/fnew-2023-1.csv

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