CHENG Chuanyu

 

(Kunming Engineering Corporation Limited, Power China, Kunming 650051, China)

 

 

Abstract: Aiming at the wind turbine how to avoid coupling resonance on design, the rotor system and tower coupling system dynamic modal equations by Lagrange method were established, the whole wind turbine coupling system dynamic modal equations were established by simultaneous equation, one 1500kW variable speed variable pitch doublefed wind turbine was selected and the theoretical modal parameters were obtained. Then process onsite testing, one 1500kW wind turbine in Yunnan province was selected to obtain measured modal characteristic parameters of rotor system and tower coupling system, the wind turbine stability by data analysis was researched. The results indicate that the theoretical model and the subsystem boundary conditions simplified methods are consistent with the actual situation, the data deviation is 8.6% (max), indicating a high accuracy. It can effectively conduct the wind turbine development, design and optimization.

 

Key words: wind power; coupled system; dynamical model; modal analysis; stability analysis