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Design and Validation of Demanded Power Point Tracking Control Algorithm of Wind Turbine

  • Kwansu Kim
  • Hyun-Gyu Kim
  • Cheol-jin Kim
  • Insu Paek
  • Carlo L. Bottasso
  • Filippo Campagnolo
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Abstract

Simple demanded power point tracking (DPPT) control algorithms with a mode switch are proposed and experimentally validated in this study. One is a torque-based control and uses the generator torque with fixed blade-pitch angle. The other is blade-pitch based and uses both the generator torque and blade pitch for DPPT control. Both control algorithms receive power demand from a higherlevel controller and use their control strategies to track it. The two DPPT control algorithms were integrated with the basic torque and pitch control algorithms, and simulations using an in-house code and a high fidelity multi-body dynamic aeroelastic code were performed for steady and dynamic conditions. To verify the algorithms experimentally, wind tunnel tests with a scaled wind turbine having active pitch control capability were performed. From the simulation and the test, the proposed DPPT algorithms integrated into the conventional control algorithm were found to work well with the basic wind turbine power control algorithm. The torquebased control showed better performance in terms of power tracking, but the pitch-based control showed better performance in terms of loading.

Keywords

Demand power point tracking control Active power control Wind tunnel test 

Nomenclature

Ft

Thrust force

Pcmd

Power command

P

Electrical power

Tg

Generator torque

Tgc

Torque command

Tgset–point

Set-point of torque

u

Signal of mode switch

V

Wind speed

Vr

Rotor averaged wind speed

Tower fore-aft velocity

β

Pitch angle

β0

Fine pitch angle

βc

Pitch angle command

Ωg

Generator speed

Ωr

Rotor speed

Ωgerr

Generator speed error

Ωgset–point

Set-point of generator speed

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Copyright information

© Korean Society for Precision Engineering 2018

Authors and Affiliations

  1. 1.Department of Advanced Mechanical EngineeringKangwon National UniversityGangwon-doRepublic of Korea
  2. 2.Department of Mechatronics EngineeringKangwon National UniversityGangwon-doRepublic of Korea
  3. 3.Wind Energy InstituteTechnische Universität MünchenMünchenGermany

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