China׳s wind power industry has achieved tremendous successes in recent years. The country׳s cumulative installed capacity has exceeded that of America and ranked first in the world. The fast development has also been accompanied by inevitable high risks. Wind turbine accidents are happening...

Horizontal axis wind turbines (HAWTs) are the mainstream of wind power industry in the world; however, as turbines are becoming bigger, the maintenance of equipments grows more complex and costs much higher. Compared with HAWTs, Darrieus vertical axis wind turbines (VAWTs) have more technological...