Spain 'goes 50% wind powered' - in the small hours
Wind power: Ideal if you don't need the lights on
Comment The Spanish wind power industry has proudly claimed that it has "set a new record" in that it delivered more than half the electricity used in all of Spain for several hours.
The "record" is less impressive than it sounds, however. It was achieved during the small hours of a Sunday morning, when electricity demand is lowest. The Spanish electricity grid organisation, Red Eléctrica, says that wind met more than 50 per cent of demand from 0300 to 0830 on Sunday morning, peaking at 53.7 per cent.
According to the Asociación Empresarial Eólica (the Spanish wind-biz alliance) this indicates that "wind energy is no longer marginal". Web-2.0 media commentator "diegocgteleline.es", writing for Slashdot, goes further and interprets the matter thus:
One of the most frequently raised arguments against renewable power sources is that they can only supply a low percentage of the total power because their unpredictability can destabilize the grid. Spain seems to have disproved this assertion. In the last three days, the wind power generation records with respect to the total demand were beaten twice ... there was no instability. These milestones were accomplished with the help of a control centre that processes meteorologic data from the whole country.
In fact, some people have argued in the past that the surges and dips in supply from wind, solar etc can be much steeper than most "thermal" powerplants - fossil and nuclear - can match, meaning that such plants can't be used to successfully back up a big fraction of wind on a national grid as they can't respond quickly enough to changes in the windfarms' output.
Thus, detractors of wind have argued, use of a large amount of wind would require the building of a substantial amount of faster-responding backup plant - probably "pumped storage" facilities, in which water is pumped uphill using electricity when prices are low, then later allowed to flow downhill through generator turbines when prices are high. (The price differences need to be substantial for the pumped-storage plant to pay its way, as a lot of 'leccy is wasted doing this.) Pumped storage plants cope well with short-term, spiky variations in wind whether they are storing or generating at the time; one can throttle the pumps up and down as rapidly as one can the turbogenerators.
As one might expect, given that Spanish wind was able to cope with a big fraction of demand - albeit the low demand of night-time - a large amount of pumped storage was in play. Hydro stations were never less than 6 per cent of total "demand" during the 0300-0830 period trumpeted by the wind biz, and sometimes more than 10.
Given enough pumped storage in operation, there won't be any catastrophic grid problems when large amounts of wind power are used. Wind needs pumped storage in order to stop being marginal - the use of fancy meteorological networking is comparatively unimportant.
Unfortunately wind also needs thermal power too. Pumped storage facilities able to power a nation for days are physically possible - though you'd probably have to start building them out at sea once the supply of mountain valleys ran out - but not economically possible.
What planet is Lewis on?
"Better by far, ultimately, for the human race to strive to become independent of its mother planet for survival?"
if you're trying to be rational about energy, this comment destroys any remaining shred of credibility. The energy cost of lifting people off the Earth and onto another planet is, literally, astronomical.
Plus, other planets tend not to be very nice. You might think a flooded, polluted, irradiated, famine-ravaged world is bad; but Mars, even with all the terraforming we could throw at it, would be much nastier. Our future is here on Earth, so we have to treat it with care.
Make up your mind
>...they will be cripplingly expensive to use on a large scale in real life
Well 50% of Spain requirements, even if it was at a period of low demand, isn't exactly small scale and your this report, one assume, is talking about real life. Where's amanfrommars when you need him to make sense of an El Reg reporter?
More fissionista propaganda
Renewables will never work we have to go nuke! (forgive me if I paraphrase).
The percentage of renewable energy in the world's electricity supply rises year by year and the nuclear power lobby keeps insisting it will never provide a subsational amout of the grid load. The figures from Spain and Denmark show this is just not true.
Mr Page call support for renewables "government market-meddling" but there is no way anyone would be able to build a nuclear power station without Massive government subsidies.
Anyone out there got the latest decomissioning estimates? Read them and weep!