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Solar eclipse to disrupt German power system

AFP/The Local · 18 Mar 2015, 09:05

Published: 18 Mar 2015 09:05 GMT+01:00
Updated: 18 Mar 2015 09:05 GMT+01:00

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"The risk of an incident cannot be completely ruled out," the European Network of Transmission System Operators for Electricity (Entso-e) said recently, commenting on the situation in Europe.

"Solar eclipses have happened before, but with the increase of installed photovoltaic energy generation, the risk of an incident could be serious without appropriate countermeasures," the group said.

Germany is heavily reliant on solar power. It has a solar power capacity of 40,000 Megawatts which provided 18 percent of electricity consumption last year.

Andreas Preuss, a spokesman for power operator Amprion, told The Local that power providers have worked hard to reduce the impact.

“We have intensively prepared for the solar eclipse in cooperation with partners across Europe. We are not saying it is impossible that there will be a serious incident, but we consider it highly unlikely,” he said.

Gas and coal-fired power stations will be called upon to increase production to compensate for the drop-off of solar's part in the energy mix.

“If there are any power cuts it will only be in certain places,” Preuss said, although he could not say where power cuts were likely to occur.

“This is no different to what happens every day in Germany, when wind is low or there is not much sun. The difference is that this will happen over a short time-frame and affect all of Germany.”

Europe-wide problem

If the morning of March 20th turns out to be very sunny – before the eclipse hides the sun – the sudden drop-off in production across Europe could reach 34,000 Megawatts, the equivalent of 80 medium-sized conventional power plants.

"For the first time, this is expected to have a relevant impact on the secure operation of the European power system," Entso-e warned.

The drop-off in solar-produced energy could be as much as 75 percent if the sky is cloudless before the eclipse, which will cross Europe, from Portugal to Finland, from 9:00 am to 12:00 pm on Friday.

Network operators across Europe have put in place unprecedented contingency plans to compensate for what is expected to be a very sudden loss of power from solar sources.

The various networks have been coordinating their plans "for more than a year, with the creation of a specific task force" to look into the problem, said Konstantin Staschus, secretary general of Entso-e.

'Unprecedented test'

Aside from Germany, sunny Italy (with a capacity of 20,000 MW) and Spain (6,700 MW) could also be hit hard. France with its 5,700 MW also has a significant solar power industry.

Operators across the continent are bolstering their teams that day and have put in place a special procedure to avoid some households suffering a power cut.

They have bolstered their daily reserves that are used to compensate for normal surges in demand or declines in production. In France for example, the reserve will be boosted to 1,700 MW from the usual 1,000 MW.

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Other sources of electricity production are also on stand-by, such as hydraulic dams in France that can be pressed into service rapidly if necessary.

And the countries have vowed to share information when the day comes with inter-connections between nations set to play a key role.

"Control centres in Europe will be in constant communication during the eclipse to ... reduce the reaction time" in the event of a serious power crisis, said Straschus.

One of the key players will be the Brussels-based Coreso, where staff work around the clock to watch over the five interconnected networks in Western Europe which accounts for more than 40 percent of the EU population.

This centre will advise on whether additional capacity will need to be laid on and whether countries will have to need to lend a hand to neighbours with additional supply.

"This solar eclipse will thus be an unprecedented test for Europe's electricity system," concluded Entso-e.  

For more news from Germany, join us on Facebook and Twitter.

AFP/The Local (news@thelocal.de)

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