Title :
Collective pitch sliding mode control for large scale wind turbines considering load reduction
Author :
Yaozhen Han ; Xiangjie Liu
Author_Institution :
Sch. of Control & Comput. Eng., North China Electr. Power Univ., Beijing, China
Abstract :
Flexibility of blade, transmission system and tower observably increase with the development of wind turbines toward to large scale and light weight. Loads suffered by generating set during operational process become increasingly complex. Some control methods can be employed to reduce these loads so as to prolong life span of generating set. For the operating zone above rated wind speed, traditional control objective is only considering rotating speed of wind turbine and without considering loads, such that the loads can not be actively suppressed. Multiobjective sliding mode pitch control algorithm based on a novel double power reaching law is proposed in this paper which can control rotating speed of wind turbine and reduce equilibrium loads of tower, blade and transmission system. The simulation is carried out based on Matlab/Simulink and simulation results verified effectiveness of the designed control strategy.
Keywords :
large-scale systems; load regulation; variable structure systems; velocity control; wind turbines; Matlab; Simulink; blade flexibility; collective pitch sliding mode control; control objective; designed control strategy; double power reaching law; large scale wind turbine; load reduction; multiobjective sliding mode pitch control algorithm; operational process; rotating speed control; transmission system; wind speed; Blades; Load modeling; Poles and towers; Simulation; Vibrations; Wind speed; Wind turbines; double power reaching law; load control; sliding mode; variable pitch; wind turbines;
Conference_Titel :
Mechatronics and Control (ICMC), 2014 International Conference on
Print_ISBN :
978-1-4799-2537-7
DOI :
10.1109/ICMC.2014.7231635
