Design and Validation of Pitch H-Infinity Controller for a Large Wind Turbine

Yuan Song, Taesu Jeon, Insu Paek () and Bayasgalan Dugarjav
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Yuan Song: Department of Advanced Mechanical Engineering, Kangwon National University, Chuncheon-si 24341, Gangwon, Republic of Korea
Taesu Jeon: Department of Integrated Energy & Infra System, Kangwon National University, Chuncheon-si 24341, Gangwon, Republic of Korea
Insu Paek: Department of Integrated Energy & Infra System, Kangwon National University, Chuncheon-si 24341, Gangwon, Republic of Korea
Bayasgalan Dugarjav: Department of Electronics and Communication Engineering, School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar 14201, Mongolia

Energies, 2022, vol. 15, issue 22, 1-15

Abstract: In this study, a pitch H-infinity control algorithm was developed for variable-speed–variable-pitch (VSVP) wind turbines to improve the rotor standard deviation of the wind turbines under normal and extreme wind conditions. The pitch H-infinity control algorithm only uses H-infinity control in the blade pitch control loop in the rated power region, and conventional torque gain scheduling algorithms are applied in the partial power region. The performance of this controller was verified using simulations of a 5 MW wind turbine using the commercial aeroelastic simulation code Bladed. The performance of the pitch H-infinity controller was compared with that of the conventional proportional-integral (PI) control algorithm under three different operating conditions: normal operating conditions without sensor noise, normal operating conditions with sensor noise, and extreme operating conditions without sensor noise based on the wind turbine design standard by IEC. Based on the simulation results with two different wind speed regions, namely, the transition region and the rated power region, it was found that the proposed pitch H-infinity controller showed better rotor speed standard deviation performance in the three operating conditions and achieved lower standard deviations of the rotor speed and the electrical power without affecting the mean electrical power.

Keywords: H-infinity control algorithm; robust control; proportional–integral (PI) control; gain scheduling; normal turbulence model (NTM); extreme operating gust (EOG); sensor noise interference; wind estimator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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