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A frequency control device for wind turbines based on Karman vortex street principle

A technology of wind power generator and frequency control, which is applied to the control of wind power generators, wind power generators, wind power generation, etc., and can solve the problems of small amplitude and low wind energy absorption rate

Inactive Publication Date: 2019-08-20
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current wind turbine technology based on the Karman vortex street principle still has some limitations, because the frequency generated by the Karman vortex street is related to the wind speed, and the frequency of the Karman vortex street will change accordingly when the wind speed changes
If the frequency of the vibrating main pole of the wind turbine is fixed, it will only form resonance near a certain fixed wind speed to absorb large wind energy, and the vibrating main pole in other wind speed areas can only obtain a small amplitude, and the wind energy absorption rate is low

Method used

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  • A frequency control device for wind turbines based on Karman vortex street principle
  • A frequency control device for wind turbines based on Karman vortex street principle
  • A frequency control device for wind turbines based on Karman vortex street principle

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Embodiment Construction

[0017] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0018] As shown in Figure 1, an embodiment of the present invention provides a frequency control device for wind power generators based on the Karman vortex street principle, including a controllable water pump (3), a water reservoir (1), a liquid level sensor (8) and Core control device (5). The water storage (1) includes a layered stru...

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Abstract

The invention provides a frequency control device for a wind power generator based on the karmen vortex street principle. The frequency control device comprises a controllable water pump, a water storage device, a liquid level sensor and core control equipment. According to the frequency control device, the vibration natural frequency of a main rod of the wind power generator based on the karmen vortex street principle can be adjusted, thus the natural frequency is close to the vortex shedding frequency, the purpose of resonance is achieved, and the absorption rate of wind energy is increasedaccordingly.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a control device for adjusting the frequency of a vibrating main pole of a wind power generator based on the Karman vortex street principle. Background technique [0002] The Karman vortex street is a pair of antisymmetric vortices that are arranged alternately and rotate in opposite directions generated on the left and right sides of the wake of the object when the fluid bypasses the bluff object. In recent years, with the development of technology, wind power generators based on the Karman vortex street principle have appeared, which use the Karman vortex street generated by the wind flowing through the object to vibrate the object, and use the energy generated by the vibration to generate electricity. However, the current wind turbine technology based on the Karman vortex street principle still has some limitations, because the frequency generated by the Karman vortex stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCF03D7/00Y02E10/72
Inventor 廖力达向伟贤邹坤聂晶肖雄陈婉祎禹达
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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