Output Control of Three-Axis PMSG Wind Turbine Considering Torsional Vibration Using H Infinity Control

Kosuke Takahashi, Nyam Jargalsaikhan, Shriram Rangarajan, Ashraf Mohamed Hemeida, Hiroshi Takahashi and Tomonobu Senjyu
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Kosuke Takahashi: Graduate School of Science and Engineering, University of the Ryukyus, Okinawa 903-0213, Japan
Nyam Jargalsaikhan: Power Engineering School, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia
Shriram Rangarajan: Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
Ashraf Mohamed Hemeida: Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt
Hiroshi Takahashi: Fuji Elctric Co., Ltd., Tokyo 141-0032, Japan
Tomonobu Senjyu: Faculty of Engineering, University of the Ryukyus, Okinawa 903-0213, Japan

Energies, 2020, vol. 13, issue 13, 1-13

Abstract: Due to changes in wind, the torque obtained from the wind turbine always fluctuates. Here, the wind turbine and the rotor of the generator are connected by a shaft that is one elastic body, and each rotating body has different inertia. The difference in inertia between the wind turbine and the generator causes a torsion between the wind generator and the generator; metal fatigue and torsion can damage the shaft. Therefore, it is necessary to consider the axial torsional vibration suppression of a geared wind power generator using a permanent magnet synchronous generator (PMSG). In addition, errors in axis system parameters occur due to long-term operation of the generator, and it is important to estimate for accurate control. In this paper, we propose torque estimation using H ∞ observer and axial torsional vibration suppression control in a three inertia system. The H ∞ controller is introduced into the armature current control system (q-axis current control system) of the wind power generator. Even if parameter errors and high-frequency disturbances are included, the shaft torsional torque is estimated by the H ∞ observer that can perform robust estimation. Moreover, by eliminating the resonance point of the shaft system, vibration suppression of the shaft torsional torque is achieved. The results by the proposed method can suppress axial torsional vibration and show the effect better than the results using Proportional-Integral (PI) control.

Keywords: wind turbine; PMSG; H infinity output control (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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