Squirreled away beneath a recent Telegraph report on the subtleties of badger-culling in the UK was this intriguing morsel of wind energy news, which would seem to challenge the idea that intermittent energy sources such as wind play havoc with grid management. For the 23,700 gigawatt-hours of electrical energy generated by wind in the UK between April 2011 and September 2012, only 22 GWh of electrical energy from fossil fuels “was needed to fill the gaps when the wind didn’t blow,” it reports. Gizmag contacted the UK National Grid to find out the details.
The Telegraph’s figures come from National Grid Head of Energy Strategy and Policy, Richard Smith, speaking at the Hay Festival between May 23 and Jun 2. Gizmag has learned that he was drawing from a National Grid document sent to the Scottish Parliament in response to its own report of Nov 23 2012, entitled Report on the achievability of the Scottish Government’s renewable energy targets.
…The report shows the energy provided by the National Grid’s Short Term Operating Reserve, and how much of that was due to wind energy output being lower than forecast. Of the 246 GWh provided by the Reserve for the same period, 22 GWh are thought to be due to the wind not blowing as forecast.
In other words, for every 1,000 GWh of wind energy generated in that 18-month period, less than 1 GWh was required to meet shortfalls due to the wind not blowing as expected. “As expected” may be the crucial words missing from the Telegraph’s summary. What about the energy required when the wind isn’t blowing, when you know it isn’t going to blow, you may well ask? But, similar to the classic falling tree scenario, is a GWh of energy truly “lost” if you weren’t expecting to generate it in the first place? At the very least, the National Grid’s figures would seem to challenge the notion that wind energy throws the grid into significant disarray…
Nice to see that someone’s done a study that answers one of the perpetual whines from folks still afraid that alternative energy systems are the product of the AntiChrist.
I can’t comprehend someone who worries about running out of wind in Scotland. 🙂