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Pitch control strategy before rated power for variable speed wind turbines at high altitudes

  • Ming-wei Ge (葛铭纬)Email author
  • Wei-ming Ke (柯炜铭)
  • Hong-xia Chen (陈宏霞)
Article
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Abstract

Wind turbines in the world’s highest wind farm with an altitude of over 4000m in Naqu county of China have been put into operation in 2014. Compared with the wind turbines at lower altitudes, the rated wind speed of these wind turbines becomes much larger, and the corresponding tip-speed ratio at the rated power reduces significantly due to the lower air density. Hence, the power coefficient at the point of rated power decreases to a rather low level. To improve the performance of wind turbines at very high altitudes, a new pitch control strategy for variable speed wind turbines at the constant-speed phase, especially at the rated-speed phase before the rated power is proposed. The results show that the new pitch control strategy is very helpful to wind farms with very high altitude and low air density, which can enhance the catch of wind energy and significantly reduce the aerodynamic loads.

Key words

Wind turbine pitch control strategy high altitudes 

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Copyright information

© China Ship Scientific Research Center 2018

Authors and Affiliations

  • Ming-wei Ge (葛铭纬)
    • 1
    Email author
  • Wei-ming Ke (柯炜铭)
    • 1
  • Hong-xia Chen (陈宏霞)
    • 2
  1. 1.School of Renewable EnergyNorth China Electric Power UniversityBeijingChina
  2. 2.School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijingChina

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