Independent variable pitch control method of wind power generation system

A technology of wind power generation system and control method, which is applied to the control of wind power generators, wind power generation, wind power generators, etc., and can solve problems such as load reduction

Active Publication Date: 2013-02-13
SOUTHEAST UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem: In view of the insufficiency and complexity of the independent pitch control of the existing wind power generation system, the purpose of the present invention is to provide a method for independent pitch control of the wind power generation system. The load on the blades can be reduced, and the load on the fixed part of the wind turbine is also reduced

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  • Independent variable pitch control method of wind power generation system
  • Independent variable pitch control method of wind power generation system
  • Independent variable pitch control method of wind power generation system

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Embodiment Construction

[0043] Below in conjunction with accompanying drawing, the present invention will be further described.

[0044] The invention provides an independent pitch control method for a wind power generation system. The control method can reduce the load of the wind turbine through a corresponding control strategy when the load of the wind turbine is balanced or unbalanced. When the load of the wind turbine is balanced, compared with the traditional independent pitch control strategy, this independent pitch control strategy can save the detection of the azimuth angle of the wind turbine and multiple complex coordinate transformations between the rotating and stationary coordinate systems, and at the same time Several low-pass filters are omitted. This control strategy can reduce the load of 1p, 2p and higher frequency on the blade, and reduce the 3p load on the hub of the wind turbine at the same time. When the wind turbine load is unbalanced, this independent pitch control strategy ...

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Abstract

The invention discloses an independent variable pitch control method of a wind power generation system. The independent variable pitch control method of the wind power generation system is characterized in that a control system adopted in the control method comprises two control closed loops, namely a balanced load control closed loop and an unbalanced load control closed loop, are respectively used to deal with a load balanced situation and a load unbalanced situation of a wind turbine. On the condition of balance, the balanced load control closed loop is used to eliminate load on blades and on a fixed portion of the wind turbine; and when the unbalanced load is detected, the unbalanced load control closed loop is started to eliminate fatigue load on a hub and the fixed portion of the wind turbine. Under the conditions that the wind turbine load is balanced or unbalanced, the independent variable pitch control method of the wind power generation system not only reduces the load on the blades, the load of the fixed portion of the wind turbine is also reduced greatly.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to an independent pitch control method for a wind power generation system. Background technique [0002] As the whole society continues to pay attention to the energy crisis and environmental pollution, the development and utilization of renewable energy, especially wind power, is showing a trend of accelerated development. With the increase of the capacity of the wind turbine, the diameter of the wind turbine rotor, the weight of the nacelle, and the height of the tower all increase rapidly, so that factors such as wind shear, tower shadow effect, wind turbulence and other factors will cause more and more damage to the wind turbine. The load will eventually reduce the service life of the wind turbine. [0003] At present, the popular wind power generation system mainly adopts unified pitch control above the rated wind speed, that is, by controlling three sets of independent pi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 程明张运乾陈哲
Owner SOUTHEAST UNIV
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