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Wind turbine, brake system of wind turbine and method for operating wind turbine

A technology of wind turbines and braking systems, applied in the control of wind engines, control systems, wind engines, etc., can solve the problems of large volume, high cost, and impact of gearboxes, and achieve the effect of reducing mechanical loads

Active Publication Date: 2017-03-15
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the need to design to withstand electromagnetic torque loss events often affects the design of most wind turbine components, such as gearboxes; these designs result in gearboxes with large volume and high cost

Method used

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  • Wind turbine, brake system of wind turbine and method for operating wind turbine
  • Wind turbine, brake system of wind turbine and method for operating wind turbine
  • Wind turbine, brake system of wind turbine and method for operating wind turbine

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Embodiment Construction

[0030] In order to help those skilled in the art to accurately understand the claimed subject matter of the present invention, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following detailed descriptions of these specific embodiments, this specification does not describe some well-known functions or structures in detail to avoid unnecessary details affecting the disclosure of the present invention.

[0031] Unless otherwise defined, the technical terms or scientific terms used in the claims and the description shall have the ordinary meanings understood by those skilled in the technical field to which the present invention belongs. "First", "second" and similar words used in the specification and claims do not indicate any sequence, quantity or importance, but are only used to distinguish different components. "A" or "one" and similar words do not indicate a limitation of nu...

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Abstract

The invention discloses a method for operating a wind turbine. The wind turbine comprises a power generator provided with a stator and a rotor, a rotor side converter, a network side converter and a direct-current link which is electrically coupled between the rotor side converter and the network side converter. The method comprises the following steps of: responding to an electromagnetic torque loss event in a power generator; (a) if a power grid loss event happens, and the rotor side converter does not have faults, starting a main brake circuit to generate electromagnetic torque in the power generator; or (b) (i) if the power grid loss event does not occur or (ii) if the power grid loss event occurs and at least one of the rotor side converter and the network side converter has faults, starting an auxiliary brake circuit which is electrically coupled with a plurality of rotor windings to generate electromagnetic torque in the power generator. The invention further provides a wind turbine and a brake system for the wind turbine.

Description

technical field [0001] The present invention relates to wind power generation systems and in particular to a wind turbine, a braking system for a wind turbine and a method of operating a wind turbine. Background technique [0002] A wind turbine includes a generator having a stator and a rotor, the generator may be exemplified by a doubly fed induction generator (DFIG). The stator is directly connected to the utility grid, and the rotor is connected to the utility grid through an AC-DC-AC converter. When the generator is in power generation mode, the converter is used to control the generator's electromagnetic torque to match the wind turbine's mechanical torque. If a grid loss event occurs suddenly or the converter fails suddenly, the converter loses the ability to control the electromagnetic torque, then the electromagnetic torque will drop to zero within 100-200 milliseconds. In contrast, when the mechanical torque is reduced only by adjusting the pitch angles of multip...

Claims

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Application Information

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IPC IPC(8): F03D9/25F03D7/00H02P3/00H02P101/15
CPCY02E10/72
Inventor 戈瓦尔丹·加尼瑞迪A·M·里特谭卓辉拉杰尼·布拉P·阿加瓦尔高金萍
Owner GENERAL ELECTRIC CO
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