| 摘要 |
A controller ( 28 ) for a doubly fed induction generator ( 12,20 ) adjusts control signals to a rotor side converter ( 24 ) and line side converter ( 22 ) to adjust rotor current when a voltage transient on a utility grid ( 10 ) occurs, so that the doubly fed induction generator can ride through the transient. The controller can also turn off the transistors of the rotor side converter ( 24 ) to reduce rotor current and/or activate a crowbar ( 42 ) to reduce the voltage of the DC link ( 26 ) connecting the converters ( 22, 24 ) when significant voltage transients occur on the grid ( 10 ). This permits continued operation of the DFIG system without disconnecting from the grid.
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