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This paper proposes an approach to fault tolerant control (FTC) of a wind turbine subject to sensor faults. Both analytical and hardware redundancies are utilized in this approach. A residual generator based on a Takagi-Sugeno (T-S) fuzzy observer is proposed as the fault detection and isolation (FDI) unit. A T-S fuzzy observer design method via online eigenvalue assignment is proposed. It is shown...
Control system for wind turbine will operate with different objectives throughout its complete wind speed regions: from cut-in speed to cut-out speed. This paper presents a method for smoothly switching of controllers between these operating regions. The controllers designed in this paper are based on Pseudo Derivative Feedback (PDF), which provides smoother dynamic and simpler tuning of parameters...
Highly turbulent wind condition such as wind gusts with speed change can lead to large loads on the turbine and unnecessary turbine shut-downs by the supervisory system due to rotor overspeeds. Wind turbine control during such winds is a very difficult task that often can't be efficiently accomplished by classical wind turbine control system. This paper presents a novel approach of torque control...
Control algorithms for variable speed wind turbines are now more and more interested by engineers and scientists. The dynamic fluctuations of wind require fast dynamic response of controller in order to capture as much power as possible from power available. This makes control system more challenge. In this paper, we present Model Predictive Controller (MPC) for wind turbine system for maximum power...
Design of linear parameter varying control (LPV) for wind turbines is considered in this paper. Multivariable, robust control law, which can guarantee stability and desired performance in the whole operating region of the wind turbine, is obtained LPV controller is compared with a classical controller.
Variable speed wind generation systems are more attractive than fixed-speed systems because of the more efficient energy production improved power quality, and improved dynamic performance during grid disturbances. In this sense, to implement maximum wind power extraction, most controller designs of the variable-speed wind turbine generators employ anemometers to measure wind speed in order to derive...
Control design for variable speed wind turbine system is one of most challenge to engineer today. Wind energy conversion system that includes complex combination of aero dynamics and electrical phenomena together with anonymous action of wind speed making control system sophisticated. Beside the nonlinearity model of wind turbine, the basic control strategy for wind turbine is maximizing the power...
By adding a variable external resistance to the rotor of an induction generator used in a wind turbine, it is possible to manipulate the torque-speed curve and control the output power. The hardware implementation is accomplished by a set of three-phase external resistors connected in series with the rotor windings. To vary the effective value of the external resistance, a three-phase diode bridge...
We review the objectives and techniques used in the control of horizontal axis wind turbines at the individual turbine level, where controls are applied to the turbine blade pitch and generator. The turbine system is modeled as a flexible structure operating in the presence of turbulent wind disturbances. Some overview of the various stages of turbine operation and control strategies used to maximize...
Modern wind turbines are experiencing rapid growth in both physical size and rated capacity. As wind turbines grow larger with necessarily lighter construction materials, dampening flexible modes with active control becomes more critical. In this paper we apply the theory of ldquodisturbance utilization controlrdquo (DUC) to a 600 kW upwind machine to dampen drive-train torsion while regulating generator...
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