The eighth Demand Flexibility Service (DFS) test is set to run this evening (17 January) as temperatures throughout Britain dip.
National Grid ESO yesterday announced that the test will run from 17:30 to 18:30, with 100MW required per half an hour.
This will be the first test of the service in 2023, after a flurry of events during the end of November and into early December during the cold weather snap. 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, calling for 100MW per half an hour over the evening peak.
Similarly on 23 December the operator called for 100MW per half an hour, with these along with today’s test representing the smallest capacity requirements seen within the DFS.
Like the last two tests, today’s is an onboarding test for a subset of providers, the ESO noted. 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.