Research on variable pitch control strategy of direct-driven offshore wind turbine using KELM wind speed soft sensor

A large variable speed constant frequency (VSCF) wind power system usually adopts the variable pitch control technology to ensure the output power is steady to ensure the safety of the wind power system above the rated wind speed. But the strong nonlinear and large moment of inertia of wind turbine result in the difficulty of variable pitch control, both simple fuzzy control and conventional PID control can not achieve a good control effect. Concerning this issue, variable pitch control algorithm is proposed based on self-tuning fuzzy adaptive PID control strategy. According to the dynamic model of VSCF, a simulation model of wind turbine control system is built in this paper with Matlab/Simulink. When the wind speed is random variable above the rated speed, the simulation results show that the proposed control strategy can keep the output power of the system around the rated power.

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Experimental Study for SPAR Type Floating Offshore Wind Turbine With Blade-Pitch Control

Volume 8: Ocean Renewable Energy ◽

10.1115/omae2013-10649 ◽

2013 ◽

Cited By ~ 6

Author(s):

Toshiki Chujo ◽

Yoshimasa Minami ◽

Tadashi Nimura ◽

Shigesuke Ishida

Keyword(s):

Wind Turbine ◽

Wind Farm ◽

Offshore Wind ◽

Scale Model ◽

Offshore Wind Turbine ◽

Experimental Proof ◽

Pitch Control ◽

Model Experiments ◽

North Eastern ◽

North Eastern Part

The experimental proof of the floating wind turbine has been started off Goto Islands in Japan. Furthermore, the project of floating wind farm is afoot off Fukushima Prof. in north eastern part of Japan. It is essential for realization of the floating wind farm to comprehend its safety, electric generating property and motion in waves and wind. The scale model experiments are effective to catch the characteristic of floating wind turbines. Authors have mainly carried out scale model experiments with wind turbine models on SPAR buoy type floaters. The wind turbine models have blade-pitch control mechanism and authors focused attention on the effect of blade-pitch control on both the motion of floater and fluctuation of rotor speed. In this paper, the results of scale model experiments are discussed from the aspect of motion of floater and the effect of blade-pitch control.

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Emerging trends in vibration control of wind turbines: a focus on a dual control strategy

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2014.0069 ◽

2015 ◽

Vol 373 (2035) ◽

pp. 20140069 ◽

Cited By ~ 21

Author(s):

Andrea Staino ◽

Biswajit Basu

Keyword(s):

Vibration Control ◽

Wind Turbines ◽

Control Strategy ◽

Offshore Wind ◽

Structural Vibration ◽

Offshore Wind Turbine ◽

Dual Control ◽

Pitch Control ◽

Emerging Trends ◽

Control Schemes

The paper discusses some of the recent developments in vibration control strategies for wind turbines, and in this context proposes a new dual control strategy based on the combination and modification of two recently proposed control schemes. Emerging trends in the vibration control of both onshore and offshore wind turbines are presented. Passive, active and semi-active structural vibration control algorithms have been reviewed. Of the existing controllers, two control schemes, active pitch control and active tendon control, have been discussed in detail. The proposed new control scheme is a merger of active tendon control with passive pitch control, and is designed using a Pareto-optimal problem formulation. This combination of controllers is the cornerstone of a dual strategy with the feature of decoupling vibration control from optimal power control as one of its main advantages, in addition to reducing the burden on the pitch demand. This dual control strategy will bring in major benefits to the design of modern wind turbines and is expected to play a significant role in the advancement of offshore wind turbine technologies.

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