Doubly-fed induction generator wind turbine system having solid-state stator switch
AssigneeGeneral Electric Company
InventorRonald C. Cooper
Life of this patent
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Abstract
Wind turbine systems and methods are provided. An exemplary system includes a wind driven doubly fed induction generator having a rotor and a stator, the stator providing AC power to a stator bus. The system further includes a power converter coupled to the rotor of the doubly fed induction generator, the power converter providing an output to a line bus, and a transformer coupled to the stator bus. The system further includes a solid-state switch coupled between the stator bus and the transformer.
Claims17
A wind turbine system, comprising:
- a wind driven doubly fed induction generator having a rotor and a stator, the stator providing AC power to a stator bus;
- a power converter coupled to the rotor of the doubly fed induction generator, the power converter providing an output to a line bus;
- a transformer coupled to the stator bus;
- and
- a three-phase solid-state switch coupled between the stator bus and the transformer, wherein each phase comprises a silicon-controlled rectifier (SCR) assembly comprising at least two SCRs connected in series with a first node therebetween and at least two resistors connected in series with a second node therebetween, wherein the first node is connected to the second node.
A wind turbine system, comprising:
- a wind driven doubly fed induction generator having a rotor and a stator, the stator providing AC power to a stator bus;
- a power converter coupled to the rotor of the doubly fed induction generator, the power converter providing an output to a line bus;
- a transformer coupled to the stator bus;
- and
- a three-phase solid-state switch coupled between the stator bus and the transformer, each phase of the solid-state switch comprising at least one silicon-controlled rectifier (SCR) assembly having at least two SCRs connected in series with a first node therebetween and at least two resistors connected in series with a second node therebetween, wherein the first node is connected to the second node, the at least one SCR assembly comprising two SCRs connected in a back-to-back arrangement.
A method for controlling alternating current (AC) power transmission, the method comprising:
- generating AC power;
- outputting the AC power to a stator bus;
- and
- gating transmission of the AC power from the stator bus to a transformer using a three-phase solid-state switch, wherein each phase of the solid-state switch comprises at least one silicon-controlled rectifier (SCR) assembly having at least two SCRs connected in series with a first node therebetween and at least two resistors connected in series with a second node therebetween, wherein the first node is connected to the second node.
Dependencies are inferred from the claim text.