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Electricity Generation

Volume 485: debated on Tuesday 16 December 2008

To ask the Secretary of State for Energy and Climate Change on how many occasions a demand-side response has been required by the system operator to achieve balance in electricity supply in each of the last 10 years. (242503)

Demand control has only been used on one day in the last 10 years by the system operator to achieve balance in the electricity supply. On the 27 May 2008 automatic low frequency demand tripping relays operated disconnecting 546MW of demand following an exceptional loss of generation. Subsequently demand reduction was also instructed to the distribution network operators (DNOs).