Review: A review of active structural control: challenges for engineering informatics

A review of vibration control methods for marine offshore structures

Finite frequency H∞ control for building under earthquake excitation

A fuzzy-logic sliding-mode control strategy is proposed to capture the maximum wind energy and reduce the generator-side current harmonics for a direct-driven wind power system. The control strategy mainly consists of a fuzzy logic controller for generating the optimum dc-side current and a double integral sliding-mode current controller capable of accurately tracking the optimum dc-side current. A resonant filter is also incorporated into the fuzzy logic controller to eliminate the generator-side current harmonics. Detailed design procedure, existence, and stability conditions of the proposed control strategy have been thoroughly investigated and presented. The capability and effectiveness of the proposed control strategy have been validated by comparative experimental results.

Fuzzy-Logic Sliding-Mode Control Strategy for Extracting Maximum Wind Power

Energy-to-peak control for seismic-excited buildings with actuator faults and parameter uncertainties

Active vibration control of the linear structure with an active mass damper applying robust saturation controller

Variable speed operation of wind turbines is conducted by torque control below rated wind speed. Variable speed wind turbines could lead to extract maximum power, which is the main objective of torque control, from the potential aerodynamic power of the wind. And nonlinearity of aerodynamic torque is very important in wind turbine in the aspect of control. In this paper, a torque control method considering a nonlinear parameter for rotor speed of aerodynamic torque below rated wind speed is investigated and simulation results for a 2MW wind turbine are presented.

http://ieeexplore.ieee.org/iel5/6093620/6106068/06106364.pdf

A basic study on a nonlinear parameter of aerodynamic torque and a torque control method of wind turbine

Key Words: Wind Turbine(풍력터빈), Pitch PI Controller(피치PI 제어기), Aerodynamic Nonlinearity(공기역학적비선형성), Linearization(선형화), Closed-Loop Pitch System(폐루프피치계)초록: 블레이드와바람의상호작용에의해발생하는풍력터빈의공기역학적토크와파워의특성은매우비선형적이다 그러므로풍력터빈의전체동적거동은풍속의크기에따라서비선형적인특성을가진다 공기역학적비선형성은또한풍력터빈제어시스템의특성에영향을미치므로, 풍력터빈제어기를설계하기위해서는비선형적인공기역학적특성들에대한해석을통한고찰이필연적이다 본논문에서는정격파워이상에서풍속크기에따른비선형적인공기역학적특성들과이비선형성들이PI 제어기를가지는폐루프피치계에미치는영향들을1-질량모델의풍력터빈에대하여살펴본다Abstract: The aerodynamic power and torque of wind turbines are extremely nonlinear Therefore, the overalldynamic behavior of a wind turbine exhibits nonlinear characteristics that are dependent on the magnitude ofthe wind speed The nonlinear aerodynamic characteristics of the wind turbine also affect the characteristics ofthe control system of the wind turbine Therefore, the analysis of the nonlinear aerodynamic characteristics ofwind turbine is essential in designing the wind-turbine controller In this study, the nonlinear aerodynamiccharacteristics and the effects of these characteristics on the closed-loop pitch system with PI controller for an1-mass model of the wind turbine are investigated above rated power

Study on Properties of Pitch Control for Wind Turbine

Variable speed operation of wind turbines is conducted by torque control below rated wind speed. Variable speed wind turbines could lead to extract maximum power, which is the main objective of torque control, from the potential aerodynamic power of the wind. Torque control methods of wind turbines are classified into two cases; torque mode control and speed mode control. In this paper, simulation results applying two torque control methods in the optimal region are presented for a multi-MW wind turbine and response properties of each method are compared.

A comparative study on responses in the optimal region according to torque control methods for wind turbines

Torque control of wind turbines is important when the wind speed is below the rated speed. The main objective of torque control is to extract the maximum power from the potential aerodynamic power of the wind. Torque control methods for wind turbines are classified as torque-mode control and speed-mode control. In torque-mode control, which is well known and traditionally used in many wind turbines, the torque demand of the generator is proportional to the square of the generator speed. In speed-mode control, a PI controller is used to generate the appropriate torque demand of the generator. In this study, the two torque control methods mentioned above are applied to a 2.75-MW wind turbine; simulation results for real turbulence wind speeds are presented, and the response properties are compared.

Chae-Wook Lim

Papers

Active vibration control of the linear structure with an active mass damper applying robust saturation controller

A basic study on a nonlinear parameter of aerodynamic torque and a torque control method of wind turbine

Study on Properties of Pitch Control for Wind Turbine

A comparative study on responses in the optimal region according to torque control methods for wind turbines

Comparison of Response Properties Determined in Two Torque Control Methods for a 2.75-MW Wind Turbine Under Turbulence Wind Speed