Zhang, Yunqian

Project title: Individual pitch control of DFIG based wind turbine system
PhD period: 2011.01.01 – 2012.06.30 (prolonged till 2012.11.01)
Section: Power Electronic Systems
Research Programme: Wind Power Systems
Supervisor: Zhe Chen
Contact Information


Collaborator: Southeast University, China.
Funding: Scholarship from The Department of Energy Technology.


With the increase of wind turbine capacity, rotor diameter and the flexibility, nacelle weight, tower height of wind turbine increase rapidly. Dynamic loads caused by the rotational sampling of turbulence, the tower shadow and the wind shear affect large scale wind turbine more and more prominently, which is an essential factor that must be considered. To cope with such great loads massive structure would be needed which would increase wind turbine's price and also pose a limit to its further growth. Instead of massive structure to withstand the worst potential loads it is much more convenient to use intelligent control methods by which loads reduction can be achieved. Therefore, control algorithms that can assure load and fatigue reduction become a necessity and also attractive.

In this project, the aim of research will be focused on designing individual pitch control (IPC) strategy against loads and fatigue on different parts of wind turbine, such as blade root bending moment, tilt and yaw moments, etc. In normal and grid fault conditions, how to coordinate IPC strategy and generator control strategy to mitigate the torsional loads on the gearbox and drive train is also a practical and valuable research point. With wind turbine code FAST (Fatigue, Aerodynamics, Structures, and Turbulence), Dspace and electrical and electronic devices, the laboratory based test environment will be built to validate the models and final expected strategy of individual pitch control.


Publications in journals and conference papers may be found at VBN.