2010•Power System Protection and ControlOpen access

Response and protection of DFIG system under three-phase short circuit fault of grid

Xu Cai

Abstract

To research the technology of grid fault ride-through and protection of doubly-fed induction generator(DFIG),the responses of DFIG and converter in the case of grid fault are analyzed in detail.First,the simple space vector models are presented to estimate the moduli of DFIG stator voltage under grid fault.Then,the response of DFIG and converter in grid fault is developed in detail,and the maximum value of the short-current of DFIG is determined.At last,the method on crowbar design is proposed.

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Available abstract

Key concepts: Crowbar, Doubly fed electric machine, Stator, Fault (geology), Grid, Control theory (sociology), Induction generator, Generator (circuit theory)