Control method and device for wind generating set

A technology of a wind power generating set and a control method, which is applied in the control of wind power generators, wind power generators, wind power generation, etc., can solve problems such as loss of power generation, and achieve the effect of optimal power generation performance

Active Publication Date: 2020-10-13
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the minimum pitch angle obtained by these methods is often different from the actual optimal minimum pitch angle in the operating state, resulting in the loss of unnecessary power generation when the rated speed is reduced

Method used

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  • Control method and device for wind generating set
  • Control method and device for wind generating set
  • Control method and device for wind generating set

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Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the control method of the wind power generating set in the first embodiment includes the following steps:

[0024] S101. Optimizing the minimum pitch angle for the rated speed of the impeller to be reduced to, so as to determine the minimum pitch angle corresponding to the rated speed of the impeller that satisfies the first predetermined condition, wherein the first predetermined condition includes the minimum pitch angle corresponding to the minimum pitch angle The output power is the closest to the standard output power.

[0025] In order to facilitate the understanding of the embodiment, it should first be explained that there are many reasons for the fan to run at reduced speed, which may include being forced to operate in a noise reduction mode due to the limitation of the noise level requirements of the wind site, or by reducing the The rated speed of the impeller is used to meet the power limit requirements of the power grid. Here, t...

Embodiment 2

[0033] Such as figure 2 As shown, the control method of the wind power generating set in the second embodiment includes the following steps:

[0034] S201. Determine the rated speed range of the impeller based on the rated speed of the impeller.

[0035]The purpose of this step is to expand the scope of optimization, and take the rated speed of the impeller as a factor affecting the optimization result. This is because, in order to make the sound power level of the fan comply with the standard, the rated speed of the impeller of the fan needs to be reduced to a specific value ω, but this is based on the premise that the minimum pitch angle is constant. However, in the process of actual speed reduction, in order to avoid blade stall, it is necessary to increase the minimum pitch angle at the same time, which will change the operating state of the fan, resulting in the actual sound power level at the corresponding rated speed of the impeller being higher than the theoretical l...

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Abstract

The invention discloses a control method and device for a wind generating set. The method comprises the steps that the optimization of a minimum pitch angle is carried out on the impeller rated rotating speed to be reduced so as to determine the minimum pitch angle which meets a first preset condition and corresponds to the impeller rated rotating speed, wherein the first preset condition comprises output power corresponding to the minimum pitch angle, and the output power is closest to the standard output power; and the wind generating set is controlled to operate at the impeller rated rotating speed and the minimum pitch angle corresponding to the impeller rated rotating speed so as to avoid the situation that blades of the wind generating set stall in the rotating speed reducing process. According to the control method, when the impeller rated rotating speed is reduced, the technical effect that the generating capacity is optimal during the operation of the wind generating set is ensured while the minimum pitch angle is increased to ensure that the blades do not stall.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a control method and device for a wind power generating set. Background technique [0002] In recent years, the wind power industry has developed rapidly, and the installed capacity has increased year by year. During the operation of the wind power generating set (hereinafter referred to as "fan"), various situations may cause the rated speed of the impeller to be reduced. For example, because the noise generated by the fan exceeds the standard during operation, it is necessary to control the fan to run at a reduced speed, or to control the fan to reduce the rated speed of the impeller due to the requirements of the grid power limit. [0003] However, as the rated speed of the impeller decreases, the resultant speed acting on the leading edge of the blade will decrease, resulting in an increase in the angle of attack of the blade, which will cause the blade to stal...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F03D7/04
CPCF03D7/043F03D7/0224Y02E10/72
Inventor欧发顺
OwnerBEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD