Energy & Green Tech

US to hold largest-ever offshore wind farm auction next month

The US government announced Wednesday it will auction more than 480,000 acres off the coasts of New York and New Jersey to build wind farms as part of its campaign to supply renewable energy to more than 10 million homes ...

Consumer & Gadgets

'Ocean battery' targets renewable energy dilemma

A wind turbine sitting idle on a calm day or spinning swiftly when power demand is already met poses a problem for renewables, and is one researchers think can be tackled under the sea.

Energy & Green Tech

Wildlife concerns blunt Germany's green power efforts

Germany is expanding its power grid to aid the transition to renewable energies, but local residents in some areas are holding up the process over concerns about wildlife.

Energy & Green Tech

High-altitude wind power reaches new milestone

As part of the EU-funded REACH project, Dutch start-up Kitepower has successfully deployed its Airborne Wind Energy System (AWES) in the Caribbean. This is a landmark achievement for the company working to bring its Falcon ...

Energy & Green Tech

Scientists bring efficiency to expanding offshore wind energy

New Cornell research shows how to make offshore wind farms more efficient in the face of impending rapid expansion—crucial information as the U.S. Department of the Interior affirmed White House plans to lease federal waters ...

Energy & Green Tech

Bigger, better blades for wind turbines

As Europe's wind turbines grow in size, with individual blades longer than a professional football pitch, the biggest challenge will be delivering more power with less wear.

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Wind power

Wind power is the conversion of wind energy into a useful form, such as electricity, using wind turbines. At the end of 2008, worldwide nameplate capacity of wind-powered generators was 121.2 gigawatts (GW). Wind power produces about 1.5% of worldwide electricity use, and is growing rapidly, having doubled in the three years between 2005 and 2008. Several countries have achieved relatively high levels of wind power penetration, such as 19% of stationary electricity production in Denmark, 11% in Spain and Portugal, and 7% in Germany and the Republic of Ireland in 2008. As of May 2009, eighty countries around the world are using wind power on a commercial basis.

Large-scale wind farms are connected to the electric power transmission network. Smaller turbines are used to provide electricity to isolated locations. Utility companies increasingly buy back surplus electricity produced by small domestic turbines. Wind energy as a power source is attractive as an alternative to fossil fuels, because it is plentiful, renewable, widely distributed, clean, and produces no greenhouse gas emissions; however, the construction of wind farms (as with other forms of power generation) is not universally welcomed due to their visual impact and other effects on the environment.

Wind power is non-dispatchable, meaning that for economic operation all of the available output must be taken when it is available, and other resources, such as hydropower, and standard load management techniques must be used to match supply with demand. The intermittency of wind seldom creates problems when using wind power to supply a low proportion of total demand. Where wind is to be used for a moderate fraction of demand, additional costs for compensation of intermittency are considered to be modest.

This text uses material from Wikipedia, licensed under CC BY-SA