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Wind turbine and protection system of wind turbine

A technology for wind turbines and protection systems, applied in wind power generation, single grid parallel feeding arrangements, etc., can solve problems such as increased costs, large gearbox volume, etc., and achieve the effect of reducing mechanical loads

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

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Problems solved by technology

However, such a design results in a larger volume of the gearbox and increases the cost

Method used

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  • Wind turbine and protection system of wind turbine
  • Wind turbine and protection system of wind turbine
  • Wind turbine and protection system of wind turbine

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Embodiment Construction

[0032] 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.

[0033] 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 provides a protection system of a wind turbine. The wind turbine includes a generator having a stator and a rotor, a rotor side converter, a grid side converter and a direct current link located between the rotor side converter and the grid side converter, and the protection system includes a first switch element, one or more side resistor elements and a controller. The one or more side resistor elements are electrically coupled with the direct current link or a plurality of windings of the stator through one or more side switch elements. The controller is used for controlling the first switch element to disconnect the grid side converter and the plurality of windings of the stator with a public power grid in response to an electromagnetic torque loss event, and controlling the one or more side switch elements to switch on electrical connection between the one or more side resistor elements and the direct current link or electrical connection between the one or more side switch elements and the plurality of windings of the stator so as to generate electromagnetic torque in the generator. The invention also provides a wind turbine.

Description

technical field [0001] The present invention generally relates to a wind power generation system, and in particular to a wind turbine and a protection system for the wind turbine. Background technique [0002] Typically, a wind turbine includes a generator with 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 via AC-DC-AC The converter is connected to the utility grid. When the generator is in a generating mode, the above-mentioned inverter controls the electromagnetic torque of the generator so as to bring the rotation speed of the rotor to a desired operating speed. This electromagnetic torque matches the mechanical torque of the wind turbine. If an electromagnetic torque loss event occurs suddenly, and the above-mentioned converter loses the ability to control the electromagnetic torque, then the electromagnetic torque will drop to zero with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 戈瓦尔丹·加尼瑞迪A·M·里特谭卓辉拉杰尼·布拉高金萍
Owner GENERAL ELECTRIC CO
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