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A deadbeat power control scheme for doubly-fed induction generator for variable speed wind power generation was proposed. The deadbeat power control uses the stator field oriented and the controller calculates the voltage vector to be supplied to the rotor in order to eliminate the active and reactive power errors in each period. Experimental results are presented for validation of the deadbeat controller...
This paper explains a method to calculate the capacitance value of a 3-Ø cage induction motor working as a generator in the self-excited mode of operation. The synchronous impedance test method has been reviewed. The capacitance value is determined from the manufacturer data. The effect of voltage variation with different capacitances has been evaluated at constant speed. Performance of self-excited...
According to the control principle of the vector analysis, this paper establishes Variable-Speed Constant-Frequency (VSCF) doubly fed induction generator's power-angle characteristic equation and static synchronizing torque's mathematical model firstly. The equation directly shows the relationships of DFIG's power-angle & static synchronizing torque and generator's parameters & rotor excitation...
The Doubly Fed Induction Generator (DFIG) is one of the most popular topologies applied in wind power systems. Its main advantage is to adjust the speed of a large system with much lower power converters. This is because its rotor side converter (RSC) operates under slip frequency and it needs only to support slip power to the overall system. However, this slip frequency is much lower than the grid...
According to the mathematical model of the doubly-fed induction generator (DFIG) and the field-oriented vector-transformation control technique, the control strategy of the variable-speed constant-frequency wind power generator is analyzed which can realize the decoupling control of active power and reactive power of DFIG. On the experimental platform of the DFIG system which is based on TMS320LF2812,...
Doubly-fed induction generator (DFIG) is widely applied in Variable Speed Constant Frequency (VSCF) wind power system. In recent years the proportion of wind power became more and more in the electricity supply. The failure of power grid will lead to voltage drop and will cause system transient instability and may lead to partial or full paralysis. So Low Voltage Ride Through (LVRT) requirements is...
Switched reluctance generator is a new technology to convert the wind energy into electrical power, The concept behind the excitations for the switched reluctance generator will be discussed in this paper with simulation assistance using Ansoft and Multisim software, tested results for the proposed method will be discussed in this paper.
The brushless Doubly-Fed Machine (BDFM) shows commercial benefits in the wind power generation. This paper presents a vector control scheme for the BDFM operating as a variable speed generator (VSG). The proposed vector controller is developed on the power winding stator flux frame, and can be used to control both speed and reactive power. The machine model and the control system are developed in...
This paper concerns the design and practical application of the multipolar induction generator which can be applied to small power directly driven wind generators (1 - 30 kW). All the windings of this generator are placed on the stator. The overturned rotor is tooth-like without windings on it. The stator is placed inside the rotor. This construction helps to reduce the weight of the generator for...
Indirect and direct vector control strategies can be applied to a stand alone doubly fed induction generator (DFIG) for wind energy applications. The control algorithm allows generating constant frequency and voltage with variable mechanical speed. The maximum power tracking can only be realised by controlling the load power. In this study the load was modelled as a controlled rectifier supplying...
Traditional wind power generation is directly or step-down cut in, and the current impact is extremely high. In this paper, according to the characteristic of AC-excited variable speed constant frequency (VSCF) wind power generation, a vector control technique is applied in doubly fed induction generator (DFIG), and an idle load cutting-in control strategy is presented based on grid voltage orientation...
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