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This paper focuses to improve wind turbine systems efficiency, in other words, to maximize the output power delivered by the wind turbine. To do this it is necessary to have a good controller. In this study, we use a nonlinear synergetic controller. Synergetic control theory is applied to reach the maximum power point tracking (MPPT) of a variable speed energy conversion system. A comparison with...
This paper presents the application of H-infinity controller for speed control of variable speed wind turbine system. For constant Wind speed and blade pitch angle aerodynamic torque coming from wind is constant, with the increase in demanded electrical torque the rotor speed decrease. Preferred function of the wind turbine is to keep the turbine speed close to rated speed and also the output power...
Pitch control is very important for variable-speed variable-pitch wind generator systems (VSVP-WGSs) working in high wind speed region. Dynamic inversion control is an emerging method applied in this situation. As the dynamic inversion method is very sensitive to parameters accuracy, a dynamic inversion control strategy based on multirate sampling is proposed in this paper. Multirate sampling method...
This paper focuses on a robust power generation control strategy for a variable speed wind energy conversion system based on a permanent magnet synchronous generator. The proposed control strategy combines a robust observer of the aerodynamic torque with a Sliding Mode (SM) based field oriented control strategy. The robust vanishing of the observation error and the tracking error is proved. Reported...
Renewable energy sources have focused a special attention in wind energy conversion systems, where the goal is maximal power extraction. This paper presents an evaluation of the linear controllers eigen structure assignment, linear quadratic regulator, and the robust loop shaping design procedure actuating on a small wind energy conversion system with a permanent magnet synchronous generator, the...
When the wind speed is between the cut-in and the rated wind speed, the generator control aims at maximum energy capture. The third-order nonlinear model of the Permanent magnet synchronous generator (PMSG)-based wind power conversion system (WECS) is established. In order to ensure maximum energy capture under rated wind speed, firstly, the nonlinear model is linearized around different operating...
The fixed-pitch wind turbines have simple structure and lower cost, which change the output power mainly depending on the stall characteristics of the blades when the speeds of the turbine is constant. To increase the output power of the turbines, the variable speeds running in deep stall regime should be researched. Fixed-pitch variable speed wind turbines can be operated not only for MPPT in low...
This paper considers the design of robust LMI-based controllers for a wind turbine along its entire nominal operating trajectory. The proposed robust controller design takes into account parametric uncertainties in the model using a structured uncertainty description, which makes the controllers less conservative than controllers designed using unstructured uncertainty descriptions. The LMI-based...
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