ABSTRACT
With the advent of 1970s world energy crisis, wind power has been paid more and more attention by the countries all over the world, and the main use of wind energy is wind power generation. With the rapid development of wind power, the accidents of wind turbine damage are also increasing year by year. Any position of wind turbine is likely to damage, such as generator, gearbox, blade and so on. The damage caused by the blade breakage is the most frequent in statistics and also causes the greatest loss. What’s worse: this kind of damage is often accompanied by serious secondary disasters (destroy of the building nearby, vehicle damage, casualties, etc.). The blade is the first step to switch wind energy into electricity. The blade damage will directly lead to the paralysis of the wind turbine. In order to reduce the risk of loss during the operation of a wind turbine, and reduce the maintenance cost for wind turbine blades, the health of the blades must be paid high attention, and the study on blades damage identification must be strengthened.
