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Siemens Energy is currently erecting the power converter stations for a high-voltage direct-current (HVDC) transmission link between Baixas, to the west of Perpignan in France, and Santa Llogaia, south-west of Figueras in Spain, as important components of the Trans-European Network for electrical power. The installation can transmit a rated power of 2000 megawatts (MW) – enough to transport large amounts of electric power with a minimum of transmission losses.

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IT IS an old idea. Build solar power stations in the Sahara desert and transport the electricity produced to Europe using high-voltage, direct-current (HVDC) cables. It is simple in theory, but hard in practice—and very, very costly. But it is a carbon-dioxide-free way of making a lot of electricity, and a collecting area the size of Austria could supply the world.

A meeting on July 13th might get the ball rolling

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In the coming decades, several global developments will create new challenges for humankind. Climate change, population growth far beyond earth’s capacities, and a striving for prosperity that is invariably connected to a continually increasing demand for energy and water are the core problems with which we are confronted.

The DESERTEC Concept describes a way to solve these challenges.

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Wind power could feed 20 percent of the US energy diet. But first, the country needs a new energy network.

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Climate talks in Poznan, Poland, this week included a meeting to discuss the concept of a super-grid that would connect renewable-rich regions to energy-hungry regions via high-voltage, direct-current (HVDC) cables. It’s an attractive idea. If Iceland has all the geothermal, North Africa has the solar, Scotland has the offshore wind and the coasts can tap wave power, why not build a grid that can carry that emission-free power to inland population centres that rely on fossil fuels and nuclear?

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