Abstract
A novel and robust active disturbance rejection control (ADRC) strategy for variable speed wind turbine systems using a doubly fed induction generator (DFIG) is presented in this paper. The DFIG is directly connected to the main utility grid by stator, and its rotor is connected through a back-to-back three phase power converter (AC/DC/AC). Due to the acoustic nature of wind and to ensure capturing maximum energy, a control strategy to extract the available maximum power from the wind turbine by using a maximum power point tracking (MPPT) algorithm is presented. Moreover, a pitch actuator system is used to control the blades’ pitch angle of the wind turbine in order to not exceed the wind turbine rated power value in case of strong wind speeds. Furthermore, the rotor-side converter is used to control the active and reactive powers generated by the DFIG. However, the grid-side converter is used to control the currents injected into the utility grid as well as to regulate the DC-link voltage. This paper aims to study and develop two control strategies for wind turbine system control: classical control by proportional integral (PI) and the proposed linear active disturbance rejection control (LADRC). The main purpose here is to compare and evaluate the dynamical performances and sensitivity of these controllers to the DFIG parameter variation. Therefore, a series of simulations were carried out in the MATLAB/Simulink environment, and the obtained results have shown the effectiveness of the proposed strategy in terms of efficiency, rapidity, and robustness to internal and external disturbances.
Highlights
A novel and robust active disturbance rejection control (ADRC) strategy for variable speed wind turbine systems using a doubly fed induction generator (DFIG) is presented in this paper. e DFIG is directly connected to the main utility grid by stator, and its rotor is connected through a back-to-back three phase power converter (AC/DC/AC)
The gridside converter is used to control the currents injected into the utility grid as well as to regulate the DC-link voltage. is paper aims to study and develop two control strategies for wind turbine system control: classical control by proportional integral (PI) and the proposed linear active disturbance rejection control (LADRC). e main purpose here is to compare and evaluate the dynamical performances and sensitivity of these controllers to the DFIG parameter variation. erefore, a series of simulations were carried out in the MATLAB/Simulink environment, and the obtained results have shown the effectiveness of the proposed strategy in terms of efficiency, rapidity, and robustness to internal and external disturbances
Wind energy has been classified as one of the most important and promising renewable energy sources; it is based on the variation of the wind speed. e wind turbine converts this wind into the aerodynamic power, which is converted into electrical power by using of electric generators such as doubly fed induction generator (DFIG), squirrel cage induction generator (SCIG), or permanent magnetic synchronous generator (PMSG)
Summary
A novel and robust active disturbance rejection control (ADRC) strategy for variable speed wind turbine systems using a doubly fed induction generator (DFIG) is presented in this paper. e DFIG is directly connected to the main utility grid by stator, and its rotor is connected through a back-to-back three phase power converter (AC/DC/AC). A novel and robust active disturbance rejection control (ADRC) strategy for variable speed wind turbine systems using a doubly fed induction generator (DFIG) is presented in this paper. In a variable speed wind energy conversion system, which is based on doubly fed induction generators, the DFIG stator side is directly connected to the utility grid and the rotor side is connected through a back-to-back three phase power converter (AC/DC/AC). This configuration type is the most widely used for variable speed wind energy conversion systems; its main advantage is as follows: it can operate in both subsynchronous and supersynchronous speeds [1]. Where ωtur is the turbine speed and R is the turbine blade radius. e wind turbine aerodynamic is characterized by a power coefficient; it is a nonlinear equation which depends on λ and β; it is expressed by
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