In August 2015, US DOE released a report regarding 2014 Wind Technologies Market. In terms of installations, they summarized that wind power additions rebounded in 2014, with 4,854 MW of new capacity added in the United States bringing the total to 65,877 MW, and continued growth through 2016 is anticipated. US ranked third in annual wind additions in 2014, and the second leading market in terms of cumulative capacity. Texas installed the most capacity in 2014 with 1,811 MW, while nine states exceed 12% wind energy penetration. No commercial offshore turbines have been commissioned in the United States, while global offshore wind capacity stood at roughly 7.7 GW.
The three largest turbine suppliers to the U.S. market are GE (60% of the market), Siemens (26%), and Vestas (12%). Globally, Vestas remained the top supplier, followed by Siemens, GE, and Goldwind. Chinese turbine manufacturers continue to occupy positions of prominence in the global ratings. The U.S. wind sector is reliant on imports of wind equipment from a wide array of countries, with the level of dependence varying by component.
Technically, turbine nameplate capacity, hub height, and rotor diameter have all increased significantly over the long term. Growth in rotor diameter has outpaced growth in nameplate capacity and hub height in recent years. Turbines originally designed for lower wind speed sites have rapidly gained market share. Turbines originally designed for lower wind speeds are now regularly employed in both lower and higher wind speed sites, whereas taller towers predominate in the Great Lakes and Northeast.
Cost of wind technology was announced transactions feature pricing in the $850–$1,250/kW range. However, installed, operation, and maintenance costs projects, regions, etc. The national average levelized price of wind PPAs that were signed in 2014 fell to around $23.5/MWh nationwide, reaching all-times low.
They concluded that recent and projected near-term growth is supported by the industry’s primary federal incentive—the production tax credit (PTC), improvements in the cost and performance of wind power technologies, growing corporate demand for wind energy and state-level policies play important roles.
Source: http://energy.gov/eere/wind/downloads/2014-wind-technologies-market-report