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)


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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  1. [1]
    Wang Q., Qiu H. N. Situation and outlook of solar energy utilization in Tibet, China [J]. Renewable and Sustainable Energy Reviews, 2009, 13(8): 2181–2186.CrossRefGoogle Scholar
  2. [2]
    Muljadi E., Butterfield C. P. Pitch-controlled variablespeed wind turbine generation [J]. Industry Applications, IEEE Transactions on, 2001, 37(1): 240–246.CrossRefGoogle Scholar
  3. [3]
    Gao L., Zhang H., Liu Y. et al. Effects of vortex generators on a blunt trailing-edge airfoil for wind turbines [J]. Renewable Energy, 2015, 76: 303–311.CrossRefGoogle Scholar
  4. [4]
    Hansen M. O. L., Velte C. M., Øye S. et al. Aerodynamically shaped vortex generators [J]. Wind Energy, 2015.Google Scholar
  5. [5]
    Kim K. H., Van T. L., Lee D. C. et al. Maximum output power tracking control in variable-speed wind turbine systems considering rotor inertial power [J]. Industrial Electronics, IEEE Transactions on, 2013, 60(8): 3207–3217.CrossRefGoogle Scholar
  6. [6]
    Ge M., Wu Y., Liu Y. et al. A two-dimensional model based on the expansion of physical wake boundary for wind-turbine wakes [J]. Applied Energy, 2019, 233: 975–984.CrossRefGoogle Scholar
  7. [7]
    Bossanyi E. A. Wind turbine control for load reduction[J]. Wind energy, 2003, 6(3): 229–244.CrossRefGoogle Scholar
  8. [8]
    Sharma H., Pryor T., Islam S. Effect of pitch control and power conditioning on power quality of variable speed wind turbine generators [C]. AUPEC conference proceedings, 2001, 95–100.Google Scholar
  9. [9]
    Horiuchi N., Kawahito T. Torque and power limitations of variable speed wind turbines using pitch control and generator power control [C]. Power Engineering Society Summer Meeting, 2001, IEEE, 2001, 1: 638–643.Google Scholar
  10. [10]
    Duong M. Q., Grimaccia F., Leva S. et al. Pitch angle control using hybrid controller for all operating regions of SCIG wind turbine system [J]. Renewable Energy, 2014, 70: 197–203.CrossRefGoogle Scholar
  11. [11]
    Senjyu T., Sakamoto R., Urasaki N. et al. Output power leveling of wind turbine generator for all operating regions by pitch angle control [J]. Energy Conversion, IEEE Transactions on, 2006, 21(2): 467–475.CrossRefGoogle Scholar
  12. [12]
    Bianchi F. D., Mantz R. J., Christiansen C. F. Power regul-ation in pitch-controlled variable-speed WECS above rated wind speed [J]. Renewable Energy, 2004, 29(11): 1911–1922.CrossRefGoogle Scholar
  13. [13]
    Yilmaz A. S., Özer Z. Pitch angle control in wind turbines above the rated wind speed by multi-layer perceptron and radial basis function neural networks [J]. Expert Systems with Applications, 2009, 36(6): 9767–9775.CrossRefGoogle Scholar
  14. [14]
    Bossanyi E. A. Further load reductions with individual pitch control [J]. Wind energy, 2005, 8(4): 481–485.CrossRefGoogle Scholar
  15. [15]
    Namik H., Stol K. Individual blade pitch control of floating offshore wind turbines [J]. Wind Energy, 2010, 13(1): 74–85.CrossRefGoogle Scholar
  16. [16]
    Larsen T. J., Madsen H. A., Thomsen K. Active load reduction using individual pitch, based on local blade flow measurements [J]. Wind Energy, 2005, 8(1): 67–80.CrossRefGoogle Scholar
  17. [17]
    Selvam K., Kanev S., van Wingerden J. W. et al. Feedback–feedforward individual pitch control for wind turbine load reduction [J]. International Journal of Robust and Nonlinear Control, 2009, 19(1): 72–91.MathSciNetCrossRefzbMATHGoogle Scholar
  18. [18]
    Burton T., Jenkins N., Sharpe D. et al. Wind energy handbook [M]. John Wiley & Sons, 2011.CrossRefGoogle Scholar
  19. [19]
    Bossanyi E. A. GH-bladed user mannu version 4.2 [M]. Garrad Hassan & Partners Ltd, 2011.Google Scholar
  20. [20]
    IEC 61400-1, Wind turbines–Part 1: Design requirements [M]. 2005.Google Scholar

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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