The story below from the Guardian quoting E.ON UK CEO Golby is amazingly candid about the implications of adding wind turbines and other intermittent "renewable" energy sources for the reliability of electric grids.
It's clear that reliable ("dispatchable") generating capacity will have to be added in areas that are experiencing growth in peak demand and/or that need to replace existing generating capacity -- whether or not wind turbines are built. Electric customers could be "paying twice": once for wind turbines and again for adding reliable capacity.
Wouldn't it be nice if utility executives in the US (not to mention the US DOE and FERC) were equally candid?
The unfortunate part of the story is that Mr. Golby apparently has accepted the popular wisdom that 10% of wind generating capacity can be counted on when electricity demand peaks. The limited data that is available (e.g., TX, CA, NY) makes quite clear that the percentage of capacity that can be counted AT THE TIME OF PEAK electricity demand is much less than 10% and as low as 0% (i.e., no wind above 6 mph).
Glenn R. Schleede
Round Hill, VA
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The Guardian, 04 Jun 08
E.ON warns over backup for renewables Mark Milner
One of Britain's leading energy providers warned yesterday that Britain will need substantial fossil fuel generation to back up the renewable energy it needs to meet European Union targets. The UK has to meet a target of 15% of energy from renewables by 2020.
E.ON said that it could take 50 gigawatts of renewable electricity generation to meet the EU target. But it would require up to 90% of this amount as backup from coal and gas plants to ensure supply when intermittent renewable supplies were not available. That would push Britain's installed power base from the existing 76 gigawatts to 120 gigawatts.
Paul Golby, E.ON UK's chief executive, declined to be drawn on how much the expansion would cost, beyond saying it would be "significant". Industry sources estimate the bill for additional generation could be well in excess of £50bn.
E.ON's calculations are part of what the company calls its energy manifesto - designed to draw attention to what Golby described as Britain's "trilemma" - balancing the priorities of carbon, costs and energy security.
"We are calling for a new balanced and honest debate about the UK's energy needs, one that truly assesses the consequences in terms of carbon, cost and security of our energy choices.
E.ON is investing or has plans to invest in a series of new generation projects including wind, marine, gas and coal and has indicated interest in new nuclear stations. Golby said he wanted to to confront single-issue campaigners.
"It is easy to say 'no' to coal, easy to say 'no' to nuclear. I'm quite interested in what they are going to say 'yes' to."
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