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Variable-pitch control method for improving weak wind generating capacity of wind turbine generator

A technology of wind turbines and control methods, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve the problems of not considering the power generation of the turbines, and achieve the effect of reducing blade root swinging moment and axial thrust

Active Publication Date: 2015-11-11
SHANGHAI JIAODA INTELLECTUAL PORPERTY MANAGEMENT CO LTD +1
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] However, the above technology still does not take into account the power generation of the unit in [V cutin , v 1 ] The lifting problem in the wind speed range

Method used

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  • Variable-pitch control method for improving weak wind generating capacity of wind turbine generator
  • Variable-pitch control method for improving weak wind generating capacity of wind turbine generator
  • Variable-pitch control method for improving weak wind generating capacity of wind turbine generator

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] Such as figure 1 As shown, the present invention is an optimization and supplement to the existing conventional control method within the specific operating range of the unit. The basic content of the present invention is a control method for increasing the power generation by advancing the pitch angle action in the constant minimum speed area. The pitch control of the conventional control method needs to be slightly modified, but the converter control does not need to be modified. The impr...

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Abstract

The invention provides a variable-pitch control method for improving weak wind generating capacity of a wind turbine generator. According to the variable-pitch control method, the generating capacity is improved by advancing the pitch angle action in a constant minimum rotation speed region, the constant minimum rotation speed region where the generating capacity is improved is described through a wind speed interval, wherein the wind speed interval means the weak wind speed interval between the cut-in wind speed and the start wind speed of a maximum power point tracking (MPPT) segment. According to the variable-pitch control method, the generating capacity in the wind speed interval [Vcutin, vl] is improved based on the prior art, only an existing variable-pitch control strategy needs to be modified properly, no extra hardware device is needed, and the waving torque and axial thrust of blade roots can be lowered to a certain degree.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a control method for increasing power generation by advancing the pitch angle in the constant minimum rotational speed region. Background technique [0002] Doubly-fed wind turbines are limited by the controllability of the converter current, usually the unit slip is limited within +0.3, so there is a minimum speed ω in the weak wind speed section min limits. Existing wind power operators generally adopt this scheme. When the wind turbine cuts into the wind speed V cutin To MPPT (Maximum Power Point Tracking) segment initial wind speed v 1 This wind speed range operates at a constant minimum speed ω min . Prior art in [V cutin , v 1 ] wind speed range, the pitch angle is set to a constant value (usually 0 degrees), and the pitch angle will not act before reaching the rated wind speed. cutin , v 1 ] There is room for improvement in the wind speed rang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/72Y02P70/50
Inventor 蔡旭贾锋李征曹云峰
Owner SHANGHAI JIAODA INTELLECTUAL PORPERTY MANAGEMENT CO LTD
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