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National Grid needs emergency measure to keep UK lights on
“
Last resort” measure known as NISM issued as margins are squeezed due to power station faults and lack of wind
A Notification of Inadequate System Margin (NISM) was issued for 16:30 to 18:30 as a number of faults at Rugeley, Fiddlers Ferry, Didcott & Eggborough powerstations added up to tighten margins. At the same time a total lack of wind generation, put National Grid into a spin.
Some articles on this event describe a NISM as a “last resort” measure, as this is taken from National Grid’s own publications. However there are further steps before blackouts.
NISM
HRDR – High Risk of Demand Reduction
DCI – Demand Control Iminent
Following a NISM, existing power suppliers get very rich, very quickly. An offer of £2,500/ Megawatt hour 50x average price from Severn Power was accepted.
All this on a warm November afternoon.
See how the Telegraph has covered the incident.
Source: https://tallbloke.wordpress.com/2015/11/04/national-grid-needs-emergency-measure-to-keep-uk-lights-on/
