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Short-circuit current of wind turbines with doubly fed induction generator

作者:
J Morren，SWH De Haan

关键词:
approximation theory ； asynchronous generators ； machine protection ； machine windings ； power convertors ； power generation protection ； rotors ； short-circuit currents ； time-domain analysis ； wind turbinesThe 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 t

摘要:
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%

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