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A DFIG wind turbine is a variable-speed wind turbine widely used in modern wind power industry. The maximum power extraction of the turbine is affected by (1) electrical characteristics of the generator, (2) aerodynamic characteristics of the turbine blades, and (3) maximum power extraction control strategies. This paper presents a DFIG maximum power extraction study through integrated steady-state...
A doubly-fed induction generator (DFIG) is a dasiaspecialpsila variable speed induction machine widely used in modern large wind turbines. Unlike a fixed-speed wind turbine, a DFIG wind turbine depends strongly on the controls of the system under variable wind conditions. This paper investigates statistical properties of energy capture, conversion, and control of a DFIG wind turbine under Weibull...
This paper compares real and reactive power control for a DFIG (doubly-fed induction generator) based wind turbine system using stator-voltage and stator-flux oriented frames. The paper presents DFIG steady-state and transient models in d-q reference frame. The steady-state model is used to obtain the general relationship between the rotor d/q current and stator real/reactive power references using...
A doubly-fed induction generator (DFIG) is a 'special' variable speed induction machine widely used in modern large wind turbines. Unlike a fixed-speed wind turbine, a DFIG wind turbine depends on the controls of the system at both the generator and the wind turbine levels, and the operation of the turbine is affected by the electrical characteristics of the generator and the aerodynamic characteristics...
The doubly-fed induction generator (DFIG) is a 'special' variable speed induction machine widely used in modern large wind turbines. It is a standard, wound rotor induction machine with its stator windings directly connected to the grid and its rotor windings connected to the grid through a back-to- back PWM converter. The DFIG power generation consists of power delivered from two paths, one from...
Wind energy is emerging as an increasing viable source of energy. Many of the newly developed wind power plants are expected to come from offshore, which usually requires the integration of an offshore wind power plant into the grid through a long transmission cable. This paper studies the characteristics of a wind energy conversion system (WECS) when it is integrated to the grid in typical offshore...
The doubly-fed induction generator (DFIG) is a 'special' variable speed induction machine and is widely used as modern large wind turbine generators. It is a standard, wound rotor induction machine with its stator windings directly connected to the grid and its rotor windings connected to the grid through an AC/DC/AC PWM converter. The AC/DC/AC converter normally consists of a machine-side converter...
A wind energy conversion system (WECS) differs from a conventional power system. In a conventional power plant, the power generation can be controlled. But, the power output of a WECS fluctuates with the wind. This variable power generation nature makes it difficult for analysis, design, and management of a WECS so that various approaches have been developed to study WECS behaviors. Although a transient...
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