stall 和active stall

v3905

stall被翻譯成失速，active stall 翻譯成主動(dòng)失速
當(dāng)風(fēng)速超過一定值時(shí)，會(huì)在槳葉后緣形成漩渦，從而使功率曲線下降，發(fā)電量降低。這就是失速
主動(dòng)失速是利用這個(gè)特性，當(dāng)風(fēng)過大時(shí)候，變動(dòng)槳葉，使空氣在葉片后緣形成漩渦，降低發(fā)電量，從而避免超發(fā)，對系統(tǒng)造成損壞
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).

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