stall 和active stall

v3905

stall被翻译成失速，active stall 翻译成主动失速
当风速超过一定值时，会在桨叶后缘形成漩涡，从而使功率曲线下降，发电量降低。这就是失速
主动失速是利用这个特性，当风过大时候，变动桨叶，使空气在叶片后缘形成漩涡，降低发电量，从而避免超发，对系统造成损坏
active stall
ACTIVE STALL CONTROL (ASC)



The power control of the Turbowinds' wind turbines is based on the Active Stall Control (ASC) principle.

The ASC offers both the advantages of pitch-controlled blades and the stall effect, currently being used in the classic stall regulated wind turbines. Due to the pitch-controlled blades, the rated power level can be tuned precisely, eliminating effects of differences in air density, blade-surface contamination etc. This way, the uncertainties in the rated power level (typical for the passive stall control) can be avoided.

Consequently the ASC guarantees maximum power output for all environmental conditions without overloading the drive train of the turbine.


Besides providing power control, the blade pitch system is also used to accelerate the blades from idling to operational speed and bringing the rotor back to a safe idling situation in case of a grid loss or any other functional error (aero -braking).

summit

支持! 学习一下！