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.

Data and Resources

Additional Info

Field Value
Source National Grid Electricity System Operator
Version
Author National Grid Electricity System Operator
Author Email National Grid Electricity System Operator
Maintainer
Maintainer Email
Shared (this field will be removed in the future) Open
IB1 Sensitivity Class
IB1 Trust Framework
IB1 Dataset Assurance
IB1 Trust Framework
Update Frequency Monthly
harvest_object_id 5a0ee00a-dc3f-443c-8bb6-9ff2733a1760
harvest_source_id 916f7f66-3a3b-43e9-afc0-85d31134d7b3
harvest_source_title National Grid ESO