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Field Validation of Demanded Power Point Tracking Control Algorithm for Medium-Capacity Wind Turbine

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Abstract

In this paper, the previously proposed demanded power point tracking (DPPT) control is applied to a medium-capacity wind turbine. Based on the results of our previous studies, the control algorithm has modified to be advantageous for wind farm control and load reduction of individual wind turbines. The target turbine is a medium-capacity turbine with a rated power of 100 kW and uses direct drive-train and integrated pitch control via hydraulic pressure. Experiments were carried out for each of 100%, 30%, and 20% of the rated power with natural wind conditions at an onshore test bed in Jeju Island in South Korea. The performance data was measured at a sampling frequency of 2 Hz by changing the power command. Test results show that the power is limited by the control method presented in accordance with the power command. In addition, it is confirmed that the turbine operates similarly to the in-house simulation model.

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Abbreviations

Ft :

Thrust force

Pcmd :

Power command

Pelec :

Electrical power

Ta :

Aerodynamic torque

\({\text{T}}_{\text{g}}\) :

Generator torque

\({\text{T}}_{\text{g}}^{c}\) :

Torque command

\({\text{T}}_{\text{g}}^{set - point}\) :

Set-point of torque

U:

Signal of mode switch

\({\text{V}}\) :

Wind speed

\(\dot{x}\) :

Tower fore-aft velocity

\(\beta\) :

Pitch angle

\(\beta_{0}\) :

Fine pitch angle

\(\beta^{c}\) :

Pitch angle command

\(\varOmega_{g}\) :

Generator speed

\(\varOmega_{g}^{err}\) :

Generator speed error

\(\varOmega_{g}^{{set - po\text{int} }}\) :

Set-point of generator speed

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Acknowledgements

This work was partly supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20183010025440, Development of Real-time Simulator for Utility-scale Wind Turbines and Grid Integrated Wind Farm, and 20184030201940, Graduate track for core technologies of wind power system engineering).

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Authors and Affiliations

  1. Department of Advanced Mechanical Engineering, Kangwon National University, Engineering Building 6-319, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, South Korea

    Kwansu Kim & Hyungyu Kim

  2. Department of Mechatronics Engineering, Kangwon National University, Engineering Building 6-307, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, South Korea

    Insu Paek

  3. 29 Seongseogongdanbuk-ro 65-gil, Dalseo-gu Daegu, 42697, South Korea

    Hyoung-Gil Kim & Jaehoon Son

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  1. Kwansu Kim
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  2. Hyungyu Kim
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  4. Hyoung-Gil Kim
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Correspondence to Insu Paek.

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Kim, K., Kim, H., Paek, I. et al. Field Validation of Demanded Power Point Tracking Control Algorithm for Medium-Capacity Wind Turbine. Int. J. of Precis. Eng. and Manuf.-Green Tech. 6, 875–881 (2019). https://doi.org/10.1007/s40684-019-00107-3

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