Wind power plants require careful planning

Operating a wind power plant is more complex than simply erecting wind turbines in a windy area. Wind power plant owners must carefully plan where to position wind turbines and must consider how fast and how often the wind blows at the site.

Map of U.S. wind resources
Map of wind resources in U.S.
Click to enlarge »

Source: National Renewable Energy Laboratory, U.S. Department of Energy (public domain)

Wind turbines in the ocean
Picture of wind turbines in the ocean.

Source: Stock photography (copyrighted)

Wind speed typically increases with altitude and increases over open areas without windbreaks. Good sites for wind turbines include the tops of smooth, rounded hills; open plains and water; and mountain gaps that funnel and intensify wind.

Wind speeds are not the same across the country

Wind speeds vary throughout the United States. Wind speeds also vary throughout the day and from season to season. In Tehachapi, California, the wind blows more frequently from April through October than it does in the winter. This fluctuation is a result of the extreme heat of the Mojave Desert during the summer months. As the hot air over the desert rises, the cooler, denser air above the Pacific Ocean rushes through the Tehachapi mountain pass to take its place. In a high altitude Great Plains state like Montana, strong winter winds channeled through the Rocky Mountain valleys create more intense winds during the winter.

Fortunately, the seasonal variations in wind speeds in California and Montana match the electricity demands of consumers in those states. In California, people use more electricity during the summer for air conditioners. In Montana, people use more electricity in general during the winter.

Locations of U.S. wind power projects

Wind power projects with one or more large wind turbines were located in 40 states in 2015. The five states with the most electricity generation from wind in 2015 were Texas, Iowa, Oklahoma, California, and Kansas. These states combined produced about 50% of total U.S. wind electricity generation in 2015.

International wind power

Many countries generate electricity with wind energy. Most wind power projects are located in Europe and in the United States where government programs have supported wind power development. China and India have increased wind electricity generation in recent years, and were among the top five producers of electricity generation from wind in 2013. The United States led the world in wind power generation in 2013, followed by China, Germany, Spain, and India.

Offshore wind power

The waters off the coasts of the United States have significant potential for electricity generation from wind energy, and several offshore wind projects in New England are in the planning stages. Europe has a number of operating off-shore wind energy projects.