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The DFIG is excited by converter which is connected rotor. The performance of wind turbine is depended on the matching conditions of the DFIG and converter. And the DFIG equivalent circuit parameter will influence the generator electromagnetic design. Based on the equivalent circuit and the test data, this paper put forward a kind of theory and calculation method to separate the equivalent circuit...
Doubly-Fed Induction Generators (DFIGs) are widely used for modern wind turbines. Although the stator winding of DFIG is directly connected to a grid while a rotor winding is connected to converters, it has a large outer size because of the high current in the stator winding. This paper proposes a grid-connected to a rotor type DFIG where rotor winding is connected to the grid instead of stator winding...
A doubly-fed induction generator (DFIG) system is being applied to the modern wind turbines, because it has many advantages such as the variable-speed operation, relatively high efficiency and the small converter size. This paper proposes a protection algorithm for a DFIG based on the d-q equivalent circuit in the time domain. In the DFIG, the voltages and currents of the rotor the stator side are...
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