BS ISO 10816-21:2015

1   Scope This part of ISO 10816 specifies the measurement and evaluation of mechanical vibration of wind turbines and their components by taking measurements on non-rotating parts. It applies to horizontal axis wind turbines with mechanical gearbox and rated generator output exceeding 200 kW and the following design and operational characteristics:

       a)  installation on supporting systems (tower and foundation) made of steel and/or concrete; 
   
   
     
       b)  horizontal axis rotor with several rotor blades; 
   
   
     
       c)  rotor bearing separate from or integrated into the gearbox; 
   
   
     
       d)  generators driven via gearbox; 
   
   
     
       e)  generators of the synchronous or asynchronous type (mostly equipped with 4-pole generator); 
   
   
     
       f)  generators with only a fixed pole number or which are pole-changeable for speed adjustment; 
   
   
     
       g)  output control by rotor blades (pitch or stall wind turbines); 
   
   
     
       h)  generator coupled to the power grid via converter or directly. 
   
 

This part of ISO 10816 recommends zones for evalu...