Brake control method and system of wind generating set

A wind turbine and braking control technology, applied in the control of wind turbines, wind turbines, wind energy power generation, etc., can solve problems affecting the mechanical life of wind turbines, etc., to ensure long-term safe operation, reduce shutdown loads, and avoid impact. Effect

Active Publication Date: 2018-10-09
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a braking control method and system for wind power generators to solve the problem of affecting the mechanical life of wind power generators caused by emergency shutdown in the event of grid failure in the prior art

Method used

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  • Brake control method and system of wind generating set
  • Brake control method and system of wind generating set

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Effect test

Embodiment 1

[0023] figure 1 It is a flow chart of a braking control method for a wind power generating set according to an embodiment of the present invention. The braking control method can be used to perform braking and load reduction control on the wind power generating set when the power grid fails, so as to reduce the shutdown load of the wind power generating set, so that the wind turbine can stop safely, thereby solving the problem of power grid failure in the prior art. The problem of affecting the mechanical life of the wind turbine caused by emergency shutdown in the event of a failure.

[0024] In this embodiment, the main control system of the wind power generating set is used as an example to illustrate the braking control method, but those skilled in the art should understand that in practical applications, any other equipment with corresponding data collection and processing functions , can refer to this embodiment to implement the braking control method of the wind power ...

Embodiment 2

[0038] figure 2 It is a flow chart of the braking control method of the wind power generating set according to the second embodiment of the present invention.

[0039] The braking control method in this embodiment can be regarded as an optional specific implementation manner of the braking control method in the first embodiment above. The executive body of the brake control method of this embodiment can be the main control system of the wind power generating set, but those skilled in the art should understand that in practical applications, any other equipment with corresponding data collection and processing functions can refer to This embodiment implements the braking control method of the wind power generating set of the present invention. For example, the execution subject of the brake control method in this embodiment may also be an external controller independent of the main control system and the converter of the wind power generating set, or a control device integrat...

Embodiment 3

[0070] image 3 It is a flow chart of the braking control method of the wind power generating set according to the third embodiment of the present invention.

[0071] The braking control method of the wind power generating set in this embodiment includes control methods on the converter side and the main control system side.

[0072] The control method on the converter side of this embodiment includes:

[0073] S310. Detect whether the power grid fails.

[0074] In a feasible implementation manner, the converter periodically detects the state parameters of the power grid, and determines whether a fault occurs in the power grid by judging whether the state parameters of the power grid exceed a preset safety threshold. Among them, the grid fault includes one or more of high grid voltage, low grid voltage, high grid frequency, low grid frequency, unbalanced grid voltage, unbalanced three-phase current, overcurrent protection, current overload, low overtime, high overtime Multi...

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Abstract

The embodiment of the invention provides a brake control method and system of a wind generating set. The brake control method comprises the steps that according to information of failures of a power grid, the wind generating set is subject to brake load reduction control, and the brake load reduction control comprises the steps that a pitch system of the wind generating set is controlled to execute feathering according to the preset maximum feathering speed, and a converter of the wind generating set is controlled to execute the preset maximum torque set. According to the technical scheme, theshutdown load of the wind generating set can be effectively reduced, the wind generating set can be safely shut down, the influence on the mechanical property of the wind generating set can be avoided, the mechanical service life of the wind generating set is ensured, and long-term safety running of the wind generating set can be ensured.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a braking control method and system for a wind power generating set. Background technique [0002] At present, when the power grid failure occurs outside the standard curve of the wind turbine, the main circuit breakers on the motor side and the grid side are both disconnected, and the pitch system independently completes the braking and shutdown of the wind turbine. However, with the rapid development of the wind power industry, the single-unit capacity of wind power generators is increasing day by day. If this emergency shutdown method is still used, it is easy to cause excessive ultimate load of the tower bottom bending moment in the case of gusts, resulting in A large shutdown load reduces the mechanical life of the wind turbine and poses a hidden danger to the long-term safe operation of the wind turbine. Contents of the invention [0003] Embodiments of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D7/04
CPCF03D7/0224F03D7/0244F03D7/0264F03D7/042Y02E10/72
Inventor 王金鹏郭锐阮景锋
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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