A Novel Pitch Control System of a Large Wind Turbine Using Two-Degree-of-Freedom Motion Control with Feedback Linearization Control

Wang, Ching-Sung; Chiang, Mao-Hsiung

doi:10.3390/en9100791

Cited by 25 publications

(21 citation statements)

References 24 publications

(21 reference statements)

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“…Figure shows the power coefficient of the wind turbine and describes the capacity of the wind turbine to obtain the wind energy . The coefficient is a function of the blade pitch angle ( β ) and the tip‐speed ratio ( λ ).…”

Section: Transmission Characteristic For the Transmission Systemmentioning

confidence: 99%

“…(1) Figure 6 shows the power coefficient of the wind turbine and describes the capacity of the wind turbine to obtain the wind energy. 21 The coefficient is a function of the blade pitch angle (β) and the tip-speed ratio (λ). From the viewpoint of the Betz limit, the maximum of wind turbine power coefficient can be achieved in the region b and the region 3.…”

Section: Dynamic Model Of the Overall Transmission Systemmentioning

confidence: 99%

“…Song et al adapted the adaptive algorithms to design a control strategy for a variable‐speed wind turbine. Wang et al proposed a linear feedback control strategy by building a two‐degree freedom dynamic model of the wind turbine. Fan et al presented an optimized wind turbine power‐wind speed curve for capturing more wind energy in the low‐wind speed areas.…”

Section: Introductionmentioning

confidence: 99%

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The transmission characteristic for the improved wind turbine gearbox

Fan

Zhu

et al. 2019

Energy Science & Engineering

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The structure of an improved wind turbine gearbox is presented for meeting the operation of the optimized wind turbine power‐wind speed curve (P‐v curve). When the wind speed is lower than the cut‐in wind speed, the operation mode of the wind turbine is changed by the extra power, which is supplied by the motor excited source to keep the wind turbine running. Moreover, the transmission principle of the improved wind turbine gearbox is discussed. Various motor power impacts on the transmission characteristic for the improved transmission structure are investigated and results are compared with the professional software. Results indicate that as the motor power increases, the transverse vibration of sun gears and meshing forces of the low‐speed and medium‐speed planetary stages decreases. The transverse vibration for the pinion gear of the high‐speed stage enhances with the increase of the motor power. Load‐sharing coefficients of the planetary gear stages are augmented with the enlargement of the motor power. It is found that meshing forces of the torque‐implement parallel stage are increased with augmentation of the motor power.

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Section: Transmission Characteristic For the Transmission Systemmentioning

confidence: 99%

Section: Dynamic Model Of the Overall Transmission Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The transmission characteristic for the improved wind turbine gearbox

Fan

Zhu

et al. 2019

Energy Science & Engineering

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“…If the load motor simulates the wind load through this process, the pitch motor connected to the pitch bearing has to be controlled to follow the target pitch angle while overcoming the wind load, which interferes with the changes of pitch angles [22].…”

Section: Wind Load Simulation Systemmentioning

confidence: 99%

Development of Hardware-in-the-Loop-Simulation Testbed for Pitch Control System Performance Test

et al. 2019

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This paper deals with the development of a wind turbine pitch control system and the construction of a Hardware-in-the-Loop-Simulation (HILS) testbed for the performance test of the pitch control system. When the wind speed exceeds the rated wind speed, the wind turbine pitch controller adjusts the blade pitch angles collectively to ensure that the rotor speed maintains the rated rotor speed. The pitch controller with the individual pitch control function can add individual pitch angles into the collective pitch angles to reduce the mechanical load applied to the blade periodically due to wind shear. Large wind turbines often experience mechanical loads caused by wind shear phenomena. To verify the performance of the pitch control system before applying it to an actual wind turbine, the pitch control system is tested on the HILS testbed, which acts like an actual wind turbine system. The testbed for evaluating the developed pitch control system consists of the pitch control system, a real-time unit for simulating the wind and the operations of the wind turbine, an operational computer with a human–machine interface, a load system for simulating the actual wind load applied to each blade, and a real pitch bearing. Through the several tests based on HILS test bed, how well the pitch controller performed the given roles for each area in the entire wind speed area from cut-in to cut-out wind speed can be shown.

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“…Adopting this method, the generator speed can be kept at constant, while load is reduced. In [13], a two-degree-of-freedom (2-DOF) controller is designed to adjust output power. The control structure comprises a feedforward controller and a feedback controller.…”

Section: Introductionmentioning

confidence: 99%

Feedforward Feedback Pitch Control for Wind Turbine Based on Feedback Linearization with Sliding Mode and Fuzzy PID Algorithm

Ren

Zhang

Deng

et al. 2018

Mathematical Problems in Engineering

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After exceeding rated power, variable speed variable pitch wind turbines need to keep output powers at rated value by adopting pitch angles. With the typical nonlinear characteristics of the wind turbines, it is difficult to control accurately by conventional linear controller. Though feedback control can realize the stability of the system, it is effective only when deviations are produced. As such, feedforward control can be applied to compensate the time-delay produced by feedback control. Accordingly, we propose a compound control strategy that combines feedback controller with feedforward controller in this paper. In feedback loop, we adopt fuzzy algorithm to adjust the parameters of PID controller. Furthermore, to overcome large variation of input wind speed, variable universe theory is proposed to optimize fuzzy algorithm. In feedforward loop, we propose feedback linearization to address nonlinear problem. Furthermore, sliding mode algorithm is supplied to improve the robustness of feedback linearization. Therefore, feedforward loop can efficiently compensate time-delay deficiency of wind turbine systems. Simulation results show that the proposed controller can enhance the control accuracy and robustness of the system.

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A Novel Pitch Control System of a Large Wind Turbine Using Two-Degree-of-Freedom Motion Control with Feedback Linearization Control

Cited by 25 publications

References 24 publications

The transmission characteristic for the improved wind turbine gearbox

The transmission characteristic for the improved wind turbine gearbox

Development of Hardware-in-the-Loop-Simulation Testbed for Pitch Control System Performance Test

Feedforward Feedback Pitch Control for Wind Turbine Based on Feedback Linearization with Sliding Mode and Fuzzy PID Algorithm

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