Feeds

Spain 'goes 50% wind powered' - in the small hours

Wind power: Ideal if you don't need the lights on

Beginner's guide to SSL certificates

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.

Choosing a cloud hosting partner with confidence

More from The Register

next story
Bond villains lament as Wicked Lasers withdraw death ray
Want to arm that shark? Better get in there quick
Renewable energy 'simply WON'T WORK': Top Google engineers
Windmills, solar, tidal - all a 'false hope', say Stanford PhDs
SEX BEAST SEALS may be egging each other on to ATTACK PENGUINS
Boffin: 'I think the behaviour is increasing in frequency'
Reuse the Force, Luke: SpaceX's Elon Musk reveals X-WING designs
And a floating carrier for recyclable rockets
The next big thing in medical science: POO TRANSPLANTS
Your brother's gonna die, kid, unless we can give him your, well ...
NASA launches new climate model at SC14
75 days of supercomputing later ...
Antarctic ice THICKER than first feared – penguin-bot boffins
Robo-sub scans freezing waters, rocks warming models
Britain's HUMAN DNA-strewing Moon mission rakes in £200k
3 days, and Kickstarter moves lander 37% nearer takeoff
Your PHONE is slowly KILLING YOU
Doctors find new Digitillnesses - 'text neck' and 'telepressure'
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
How to determine if cloud backup is right for your servers
Two key factors, technical feasibility and TCO economics, that backup and IT operations managers should consider when assessing cloud backup.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.