Active Control of Drive Chain Torsional Vibration for DFIG-Based Wind Turbine

Li, Zhongyi; Tian, Shiji; Zhang, Yefei; Li, Hui; Lü, Min

doi:10.3390/en12091744

Cited by 13 publications

(3 citation statements)

References 23 publications

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“…The concrete realization is divided into two steps: the first step is the extraction of the vibration signal of a specific frequency from the speed of the generator and filtering it with band-pass filter; the second step is to add the reverse torque for phase correction. The torque and damping control strategies can effectively suppress the drivetrain vibration caused by gear vibration [19,20].…”

Section: Suppression Strategy Of Gear Clearance Vibrationmentioning

confidence: 99%

A PID Control Method Based on Internal Model Control to Suppress Vibration of the Transmission Chain of Wind Power Generation System

Zhou

Shen

2022

Energies

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Vibrations occur in the wind turbine drivetrain due to the drivetrain’s elasticity and gear clearance. Typically, the PID control method is used to suppress elastic vibration, while the method with the disturbance suppression function is used to suppress nonlinear gear clearance vibration. The purpose of this paper is to propose an equivalent PID control method based on the internal model control (IMC) for suppressing vibration caused by the wind turbine drivetrain’s elasticity and gear clearance. The equivalent PID controller can suppresses elastic vibration; the IMC controller can suppresses gear clearance vibration. First, the vibration principle of the two-mass wind turbine drivetrain with clearance is discussed. After analyzing the nonlinear characteristics of the gear clearance, the nonlinear clearance system is decomposed into a linear unit and a nonlinear bounded disturbance unit. To suppress nonlinear bounded disturbances, a disturbance suppression method based on IMC is proposed; simultaneously, an equivalent PID controller based on IMC is designed to resolve the vibration issue caused by the wind turbine drivetrain’s elasticity. The simulation experimental results show that the clearance vibration is suppressed by the original IMC method. The PID controller obtained by the IMC equivalent transformation can suppress the elastic vibration.

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Section: Suppression Strategy Of Gear Clearance Vibrationmentioning

confidence: 99%

A PID Control Method Based on Internal Model Control to Suppress Vibration of the Transmission Chain of Wind Power Generation System

Zhou

Shen

2022

Energies

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“…In Refs. [2,11,16,17,18], it is shown that a damping axillary term proportional to the difference between the rotational speeds of the turbine and generator can present superior performance over the methods based on feeding the generator speed through a BPF with and without considering the model uncertainty. However, these works are done based on the twomass drive-train model, and the blade flexibilities are ignored; furthermore, the WT operates in the speed or torque control modes.…”

Section: Introductionmentioning

confidence: 99%

An efficient power control strategy for active mitigation of blade in‐plane fatigue loading in PMSG‐based wind turbines

Safaeinejad,

Rahimi,

Zhou

et al. 2024

IET Renewable Power Gen

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This paper assesses the dynamic performance of permanent magnet synchronous generator‐based wind turbine (WT) regarding the blade in‐plane fatigue loads once the WT is controlled in power control mode. Blade in‐plane oscillations, associated with the poorly blade in‐plane modes, can be excited by turbulent winds or grid disturbances that may lead to damage of the blades and reduce the drive‐train reliability. To overcome this drawback, at first, a model with three degrees of freedom is extracted for the drive‐train system, and then, an active mitigation approach is proposed to mitigate the blade in‐plane oscillations. The proposed method can effectively suppress the blade in‐plane vibrations by adding a supplementary term into the power control loop that is proportional to the speed difference between the blade and generator. The speed difference between the blade and generator is obtained by estimation of the blade‐hub and hub‐generator shaft torsional torques. Next, the performance of the proposed active mitigation approach is examined by the modal and frequency response analyses and time‐domain simulations. Finally, it is shown that the proposed approach has superior performance over the conventional approaches based on the simplified drive‐train model and crossing the measured generator speed through a band‐pass filter.

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“…There are extensive researches on the control of DFIG in under normal and abnormal conditions of the power grid [4]. The direct power control method can reduce the current unbalance and torque ripple of stator and rotor [5,6]; The accurate control of the positive and negative sequence current of the rotor can be realized by the current predictive controller [7]; Proposes the control strategy based on reference current generator, which is used to control threephase inverters under balanced and unbalanced grid conditions, and the oscillation of reactive power has a good suppression effect [8]; A two-channel active damping control method is proposed to improve the electromagnetic torque of the drive chain and suppress the torsional vibration of the drive chain [9]; It will cause serious torque ripple that under the interaction of positive sequence, negative sequence and harmonic voltage and current [10,11]; The GSC can not only realize the voltage stability at the DC side, but also provide reactive power compensation and suppress harmonics to the grid [12]; The Chopper device is used to limit the overvoltage on the DC side, at the instant of the fault, the generator side converter blocks the pulse signal, and the rotor overcurrent charges the DC bus capacitor through the antiparallel diode of the machine side converter [13,14]; The control effect of the control strategy based on active demagnetization is limited by the capacity of the doubly-fed converter [15][16][17][18][19][20]; Introduce the rotor current transient feed forward term to minimize rotor transient current [21]; Control method of drive chain torsional vibration under power grid fault [22][23][24][25][26]; Control the mechanical torque to restrain the torsional vibration of drive chain [27,28]. Although the existing control methods have certain control effect on the unbalance of stator and rotor current in the power grid fault state, they rarely involve the active control of DFIG drive chain torsional vibration in the case of power grid asymmetric fault.…”

Section: Introductionmentioning

confidence: 99%

Active Control Method for Torsional Vibration of DFIG Drive Chain Under Asymmetric Power Grid Fault

Tian

et al. 2020

IEEE Access

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When the asymmetric fault occurs in power grid, it will cause the oscillation of the electromagnetic torque of the doubly-fed induction generator(DFIG). The oscillation of the electromagnetic torque will cause the torsional vibration of the drive chain, and the long-term torsional vibration will shorten the service life of DFIG. The analysis shows that the positive and negative sequence current components generated by DFIG terminals are the main factors that cause electromagnetic torque oscillation when the asymmetric faults occur. Therefore, the suppression of positive and negative sequence current components is the key to achieve active control of torsional vibration of drive chain, the traditional PID control can only adjust the direct-current(DC) component without static error, and cannot suppress the negative sequence alternating-current(AC) component. In this paper, based on the traditional PID regulator, the resonance(R) current regulator with the specific frequency is incorporated into the grid-side converter(GSC) to form the PID-R current controller. The PID-R current controller can realize accurate and effective control of the positive and negative sequence components in the forward rotation synchronous speed rotating coordinate system without decomposing the positive and negative sequence components, and can actively suppress the electromagnetic torque oscillation, thereby realize the active control of the drive chain torsional vibration. MATLAB/Simulink verifies the effectiveness of PID-R current controller. INDEX TERMS asymmetrical power grid fault, drive chain torsional vibration, DFIG, electromagnetic torque, negative sequence current.

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Active Control of Drive Chain Torsional Vibration for DFIG-Based Wind Turbine

Cited by 13 publications

References 23 publications

A PID Control Method Based on Internal Model Control to Suppress Vibration of the Transmission Chain of Wind Power Generation System

A PID Control Method Based on Internal Model Control to Suppress Vibration of the Transmission Chain of Wind Power Generation System

An efficient power control strategy for active mitigation of blade in‐plane fatigue loading in PMSG‐based wind turbines

Active Control Method for Torsional Vibration of DFIG Drive Chain Under Asymmetric Power Grid Fault

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