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Wind turbine generator hyperbolic type tower design method based on frequency control and tower

A kind of wind turbine, hyperbolic technology, applied in the direction of wind power generation, installation/supporting wind turbine configuration, etc., can solve problems such as tower damage, insufficient power generation, fan vibration, etc., to solve tower resonance and meet diversification The effect of the design

Active Publication Date: 2019-05-03
CRRC WIND POWER(SHANDONG) CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

The resonance of the fan is manifested by the intersection or overlap of the excitation frequency of the impeller rotation and the natural frequency of the tower. Every time when the speed of the wind rotor runs in the resonance range, the fan will vibrate violently and trigger the shutdown of the unit. Long-term operation will affect The power generation of the unit will also cause damage to the tower, blade breakage and other disasters
With the increase of domestic installed capacity, there are fewer and fewer places with good wind resources and convenient installation. In order to compensate for the increase in costs caused by poor wind resources, wind farm owners often need larger diameter rotors and higher tower to make up for the insufficient power generation caused by small wind rotor diameter and low tower height fan, and according to the requirements of transportation conditions, the external diameter of the general tower should not exceed 4.5m, according to the design requirements of the unit to avoid resonance , the vibration-avoiding interval between the tower frequency and the blade rotation frequency must exceed at least 5%, all of which have brought severe challenges to the design and operation of current wind turbines
The key points that affect the tower frequency mainly include the tower material, structural size, external shape, etc., and when the tower material and structural size are determined, the external shape of the tower has a greater impact on the frequency of the tower, and the existing The structural forms of wind power towers in the market mainly include full-cone, variable-cone, and straight-cone. The current tower structure cannot fully match the requirements of the current wind farm market for towers, that is, in the case of ensuring that the transportation conditions are not limited Next, the height of the tower should be high, the weight should be light, and the frequency range should meet the requirements of safe operation of the unit

Method used

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  • Wind turbine generator hyperbolic type tower design method based on frequency control and tower
  • Wind turbine generator hyperbolic type tower design method based on frequency control and tower
  • Wind turbine generator hyperbolic type tower design method based on frequency control and tower

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[0041] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0042] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0043] In the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combine...

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Abstract

The invention discloses a wind turbine generator hyperbolic type tower design method based on frequency control and a tower. The method comprises the following steps that the total height, wall thickness and maximum diameter of the hyperbolic type tower are determined; a plurality of groups of hyperbolic focal points and a half-real axis length are initialized, frequency and intensity requirementsserve as constraint conditions, optimization is carried out on the basis of a particle swarm multi-objective optimization method, and the optimal solution of the hyperbolic focal points and the semi-real axis length is obtained; and the number of tower sections of the tower is set, and the size of each tower section is obtained based on the optimal solution and the number of the tower sections. The external shape of the wind power tower meeting various frequency requirements can be designed, and the lightweight design of the weight of the tower can be guaranteed.

Description

technical field [0001] The disclosure belongs to the technical field of wind power generation, and in particular relates to a frequency control-based design method for a hyperbolic tower of a wind turbine and the tower. Background technique [0002] Resonance is a phenomenon in which a physical system vibrates at a particular frequency with a greater amplitude than other frequencies. The resonance of the fan is manifested by the intersection or overlap of the excitation frequency of the impeller rotation and the natural frequency of the tower. Every time when the speed of the wind rotor runs in the resonance range, the fan will vibrate violently and trigger the shutdown of the unit. Long-term operation will affect The amount of power generated by the unit will also lead to disasters such as damage to the tower and blade breakage. With the increase of domestic installed capacity, there are fewer and fewer places with good wind resources and convenient installation. In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D13/20
CPCY02E10/72Y02E10/728
Inventor 吕超张国伟李钢强程洪民宋健
Owner CRRC WIND POWER(SHANDONG) CO LTD
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