GB System Frequency Excursions - FY1920
The National Grid Electricity System Operator (ESO) publishes annually report on the performance of the National Electricity Transmission System in Great Britain and fulfils Transmission Licence Standard Condition C17: Transmission System Security Standard and Quality of Service.
The Electricity Safety, Quality and Continuity Regulations 2002 permit variations in frequency no exceeding 1% above and below 50Hz: a range of 49.5 to 50.5Hz. Any frequency excursions outside these limits for 60 seconds or more will be reported.
System Frequency may exceed steady-state operational limits of 49.8Hz and 50.2Hz under fault conditions or when abnormal changes to operating conditions occur. Losses of generation between 1320 and 1800MW are considered abnormal and a maximum frequency change of 0.8Hz may occur, although the operation is managed so that the frequency should return within the lower statutory limit of 49.5Hz within 60 seconds.
This dataset shows all reportable frequency excursions till date in 2019/2020 based on C17 reporting criteria.
Data Dictionary
| Column | Type | Label | Description |
|---|
Additional Information
| Field | Value |
|---|---|
| Data last updated | September 9, 2020 |
| Metadata last updated | February 10, 2023 |
| Created | unknown |
| Format | CSV |
| License | ESO |
| Created | 5 years ago |
| Media type | text/csv |
| Datastore active | True |
| Has views | True |
| Id | 0a0eecbc-8172-4ffb-a321-8068ca02a5ea |
| Package id | 5643126a-e79e-4b29-85aa-c92c75ed057d |
| Position | 1 |
| State | active |