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Short-Circuit Current of Wind Turbines With Doubly Fed Induction Generator

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2 Author(s)
Johan Morren ; Electr. Power Process. Unit, Delft Univ. of Technol. ; Sjoerd W. H. de Haan

The short-circuit current contribution of wind turbines has not received much attention so far. This paper considers the short-circuit behavior, especially the short-circuit current of wind turbines with a doubly fed induction generator. Mostly, these wind turbines have a crowbar to protect the power electronic converter that is connected to the rotor windings of the induction generator. First, the maximum value of the short-circuit current of a conventional induction machine is determined. The differences between a crowbar-protected doubly fed induction generator and a conventional induction generator are highlighted and approximate equations for the maximum short-circuit current of a doubly fed induction generator are determined. The values obtained in this way are compared to the values obtained from time domain simulations. The differences are less then 15%

Published in:

IEEE Transactions on Energy Conversion  (Volume:22 ,  Issue: 1 )