System and method of operating double fed induction generators
AssigneeGeneral Electric Company
InventorsHaiqing Weng, Robert William Delmerico, Xiaoming Yuan, Changyong Wang
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Abstract
A protection system and a protection method are provided for protecting a double fed induction generator and a gearbox during a grid fault. The protection system includes a plurality of controlled impedance devices. Each of the controlled impedance devices is coupled between a respective phase of a stator winding of the double fed induction generator and a respective phase of a grid side converter. The protection system also includes a controller configured for coupling and decoupling impedance in one or more of the plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current.
Claims23
A protection system, comprising:
- a plurality of controlled impedance devices, each coupled between a respective phase of a stator winding of a double fed induction generator and a respective phase of a grid side converter;
- and
- a controller configured for coupling and decoupling impedance in one or more of the plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current.
A wind turbine generator, comprising:
- a wind turbine coupled to a double fed induction generator;
- a plurality of controlled impedance devices, each coupled between a respective phase of a stator winding of the double fed induction generator and a respective phase of a grid side converter;
- and
- a controller configured for coupling and decoupling impedance in one or more of the plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current.
A protection method, comprising:
- coupling and decoupling impedance in one or more of a plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current, wherein each of the plurality of controlled impedance devices is coupled between a respective phase of a stator winding of a double fed induction generator and a respective phase of a grid side converter.
Dependencies are inferred from the claim text.