The National Grid ESO has announced the 10th demand flexibility service (DFS) test for today (24 Jan), just a day after the first live event.
The service is set to be launched between 16:30 and 18:00. 274MW will need to be made available from 16:30 to 17:00, 330MW between 17:00 and 17:30, and finally 341MW will be needed between 17:30 and 18:00.
According to the ESO, the DFS test will be launched as part of a “cautious measure” to ensure there are adequate operational reserves for this evening.
The 19 January saw the first DFS test of 2023 after a flurry of events during the end of November and into early December during the cold weather snap. This called for 150MW of flexibility per half an hour between 09:00 and 10:00.
Over 780MWh of real and projected demand reduction has been provided over the first five DFS tests, which ran on 15 November, 22 November, 30 November, 1 December and 12 December.
Following these the ESO ran the sixth test on 20 December, and the seventh on 23 December, both with a target of 100MW per half an hour.
There are now 26 providers of DFS, up from just four during the first test back in November. National Grid ESO will continue to run tests between now and March, with at least two tests a month.
