Gerard Wynn's article points out the differing views on wind intermittency of the green subsidy junkies at IPPR and those who have to deal with the problem, namely National Grid.
Regarding day-ahead variability, the [IPPR] study did not anticipate problems: "Wind power, at penetrations likely in the UK by 2020, is variable and predictable in much the same way as demand," it said.
That confidence is not matched by Britain's transmission operator, National Grid, which published a consultation earlier this year on whether to upgrade its wind power forecasting.
"The main challenge associated with wind power is its variability; wind power output is highly dependent on weather conditions and carries a high degree of uncertainty," it said.
"As the volume of wind power capacity increases, so will the effect of wind variability and hence the accuracy of the wind power forecasts will become more important for both National Grid and the industry in terms of balancing their own position."
The National Grid highlighted the problem of cut-out, for example, where high wind conditions force turbines to switch off, removing output suddenly: "These events are difficult to forecast accurately in terms of magnitude of impact and timing."
There's more on these lines in the article. Read the whole thing.