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Flexible tower resonance crossing control method and device based on laser radar

A lidar and flexible tower technology, which is applied in the control of wind turbines, the configuration of installation/support of wind turbines, and wind energy generation, etc.

Pending Publication Date: 2021-05-18
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The resonance of the flexible tower will make the tower bear a lot of energy, the tower shakes violently, the displacement is obvious, and the load increases sharply, which seriously affects the use safety of the tower

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  • Flexible tower resonance crossing control method and device based on laser radar
  • Flexible tower resonance crossing control method and device based on laser radar
  • Flexible tower resonance crossing control method and device based on laser radar

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Embodiment Construction

[0048] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] See attached figure 1 , figure 1 It is a schematic flowchart of the main steps of the laser radar-based method for controlling resonance ride-through of flexible towers accordi...

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Abstract

The invention relates to the technical field of new energy wind generating sets, particularly provides a flexible tower resonance crossing control method and device based on a laser radar, and aims to solve the technical problem that resonance is generated during normal operation of a unit due to the fact that the natural vibration frequency of a flexible tower is lower than the rated rotation frequency of a rotor. The method comprises the following steps of taking a collected wind speed in front of an impeller of the flexible tower at a preset distance and at a hub height as input of a trained BP neural network model, and obtaining a predicted wind speed, output by the trained BP neural network model, at the hub height in front of the impeller of the flexible tower; and adjusting the rotating speed of a wind turbine generator according to the predicted wind speed at the hub height in front of the impeller of the flexible tower and a preset torque limit value of the generator. According to the scheme, braking time is provided for a controller, so that the unit accurately and quickly passes through the resonance area, and the situation that fatigue damage of the unit is increased due to frequent back-and-forth passing caused by large wind speed turbulence is avoided.

Description

technical field [0001] The invention relates to the technical field of new energy wind power generating sets, in particular to a laser radar-based method and device for controlling resonance ride-through of a flexible tower. Background technique [0002] In recent years, with the vigorous development of new energy, the first three types of wind energy resource areas on land in China have been basically developed, and the fourth type of wind energy resource areas with low wind speed in mountains and forests will become the key areas for onshore wind power development in my country. Due to the characteristics of low wind speed, high turbulence, high wind shear, and large wind direction changes in such wind resource areas, high-tower wind turbines are used to improve the utilization rate of wind energy in such areas and effectively increase power generation. [0003] In order to ensure the rigidity of the tower, the weight of the traditional tower will increase exponentially wh...

Claims

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Application Information

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IPC IPC(8): F03D13/20F03D80/00F03D7/02F03D7/04
CPCF03D7/0276F03D7/0296F03D7/046F03D13/20F03D80/00Y02E10/72Y02E10/728Y02A30/00
Inventor 龚利策秦世耀薛扬王安庆王瑞明付德义贾海坤赵娜李松迪
Owner CHINA ELECTRIC POWER RES INST
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