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This paper focuses on maximum wind power extraction for a wind energy conversion system composed of a wind turbine, a squirrel-cage induction generator, and a matrix converter (MC). At a given wind velocity, the mechanical power available from a wind turbine is a function of its shaft speed. In order to track maximum power, the MC adjusts the induction generator terminal frequency, and thus, the turbine...
A comparison of sinusoidal pulse width modulation (SPWM) and selective harmonic elimination (SHE) in a multicell DC/AC converter is presented. The genetic algorithm finds the existence optimal solution set of switching angles for each required harmonic profile. The dc links of each full bridge cell are supplied by individual high frequency DC-DC isolation stages which are connected in parallel considering...
In this paper, an improved Takagi-Sugeno fuzzy logic PSS is proposed with a novel automatic design method called CDCARLA. As an optimal control system, the proposed PSS can be designed for optimizing any reasonable objective function based on any desired technical requirements. As another advantage of the proposed method, it needs no information about the dynamical model of the power system. And as...
Many plans on power systems strongly depend on short-term load forecasting. In this paper a novel method based on linear lazy learning approach is proposed for short-term electric load forecasting. The proposed method is successfully verified through PJM market forecasting. The model is trained by the data available for four years and the next two years data is used for validation. The results prove...
This paper focuses on designing a closed-loop state feedback controller for a grid-connected wind turbine system including a matrix converter. The system the open-loop system is stable; therefore, the closed-loop controller design objective is to track a class of desired references. The state-feedback controller is designed based on the linear quadratic (LQ) method. A genetic algorithm is used to...
This paper presents a mechanical speed-sensorless maximum power tracking controller for a wind energy conversion system composed of a wind turbine, a squirrel-cage induction generator and a matrix converter. The system is first represented by a comprehensive dynamic model developed by authors. Then, an algorithm-based controller is designed to derive the maximum power that can be achieved at a given...
A comprehensive dynamic model for a matrix converter (MC) is developed which is valid for both steady-state and transient analyses. The comprehensive model includes all normal functions of the MC, i.e., control of the output voltage, output frequency, and input displacement power factor. The model is in the qdo reference frame for the MC input and output voltage and current fundamental components...
The modeling and control design for a grid- connected wind-energy converter system including a matrix converter are presented. A nonlinear model is developed including equations of mechanical aerodynamic conversion, drive train, matrix converter, and squirrel-cage induction generator. The model is linearized, and the steady-state and transient responses of the small-signal model are evaluated and...
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