by Sam Jones: Campaigners say the 107 hours when the country was powered by wind, sun and water show they can replace fossil fuels…
f you can keep your gaze off the hilltops, imagine away the pylons and forget the occasional tractor of an uncertain vintage coughing along the narrow roads, little appears to have changed in the valleys of north-eastern Portugalfor decades, perhaps even centuries.
The gnarled alvarinho vines have been relieved of their fruit to make vinho verde, an old woman in black herds her sheep through a hamlet and hungry eagles hover over the fields, scanning the land for lunch.
But look up, past the villages, the clumps of stout ponies and the wolf-haunted forests of pine, oak and eucalyptus, and the harbingers of an environmental revolution are silhouetted against the December sky.
The 130 giant wind turbines that sprout from the peaks, slicing the air with a rhythmic sigh, have helped Portugal to a remarkable achievement. For four and a half days in May the country ran entirely on electricity from renewable sources: wind, hydro and solar power.
Despite fears of a blackout, the lights stayed on for a record 107 hours between 6.45am on Saturday 7 May and 5.45pm the following Wednesday.
Francisco Ferreira, president of the Portuguese environmental NGO Zero, got wind of what was going on when a friend called that weekend. “He said: ‘I’ve been looking at the graphs and for the past two days we’ve been 100% renewable on electricity production.’ After that, we looked at the data and arrived at 107 hours. We confirmed it with the national energy network, who said we’d had 4.5 days.
“It was great to see that the system was working; to see that we could manage all these renewables even though the circumstances were quite challenging.”
Ferreira and his fellow clean energy advocates hold up those few days as further proof that renewables can reliably replace fossil fuels.
Things may have been helped along by the fact that a good chunk of the 107 hours fell over the weekend – when demand is lower – and by an unusually co-operative Mother Nature, who saw to it that the sun shone and the wind blew favourably.
But supporters of renewable power insist it was down to much more than luck. António Sá da Costa, managing director of the Portuguese renewable energy association Apren, argues it was the result of years of investment and cooperation.
“It was the coming together of three factors, without which none if it would have been possible,” he says. “The first was that we had the power plants in place to take advantage of the natural conditions during that period; second, it was only possible because of the wind, water and sun. The third was that we had the operational grid capability – in terms of both distribution and transportation – to manage this type of situation.”
Yes, the timing was lucky, he adds. But that does not lessen the achievement of linking up hundreds of dispersed renewable power plants instead of taking the easier option of relying on production from one large thermal one.
Despite the slowdown, Sá de Costa is bullish about Portugal’s capacity to comfortably meet and exceed EU targets for member states to have at least a 27% share of renewable energy consumption by 2030. With sufficient investment and construction – more windfarms and many more solar farms – he believes that Portugal could be on course to generate 60% of its energy through renewables by 2020 and 100% by 2040.
Jorge Seguro Sanches, Portugal’s energy secretary, says the country is on track to see renewable energy accounting for 31% of its energy use by 2020. He also says the government is heavily promoting a solar power programme as part of its plans to reduce dependence on oil imports and foster the development of a sustainable technology hub.
“In the past few years, we have seen a prosperous boom in windfarms,” he says. “Nevertheless, the market nowadays is oriented towards photovoltaic solar energy, as a result of its high technological development and the decline of investment costs. This is a new path for the near future, [and] will guarantee the sustainability of the Portuguese electricity system.”
In the misty valleys of Alto Minho, the windfarm is gradually becoming part of the landscape. Long-horned barrosã cattle graze among the 80-metre-high turbines and seek out their shade in summer. Hunters in pursuit of boar, rabbits and birds still crisscross the hillsides but keep a respectful distance from the technicians who service the plant. Sometimes, the odd wolf is glimpsed far below the sweeping blades.
For Sá da Costa, who has something of the glee of a prophet seeing his predictions coming true, those four and a half days in May were the best possible riposte to the naysayers.
“Now no one can come along and say in good conscience that this is impossible. No. This is possible. Because we did it. And if we did it, it’s also possible in other countries. It’s just a question of finding how to do it.”