Most of the wind turbines at Ameren's High Prairie Wind Farm remain idle following the collapse of three turbines last year, attributed to extreme weather conditions. With an average capacity factor of about 34% in the United States, turbines produce power roughly a third of the time. In the event of excess energy generated on the grid, wind turbines can be turned off to prevent problems. One reason for stopping a turbine is high winds and turbine safety. When wind. The Gansu Wind Farm in China is the largest wind farm in the world, with a target capacity of 20,000 MW by 2020. We will explain everything you should know. This article deals only with wind power for electricity generation.