Control method and device of wind power generating set and group control system of wind farm

A technology of a wind power generating set and a control method, which is applied in the control of wind power generators, the monitoring of wind power generators, and wind power generators, etc., and can solve problems such as increasing the fatigue load of the wind power generating set, increasing the vibration value of the wind power generating set, and affecting the safety of the wind power generating set

Active Publication Date: 2019-08-09
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generator resonance will cause the vibration value of the wind turbine to increase significantly. Long-term operation in the speed resonance zone will increase the fatigue load of the turbine and even affect the safety of the wind turbine.

Method used

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  • Control method and device of wind power generating set and group control system of wind farm
  • Control method and device of wind power generating set and group control system of wind farm
  • Control method and device of wind power generating set and group control system of wind farm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 2 A schematic flowchart showing a control method for a wind power generating set in Embodiment 1 of the present invention.

[0033] image 3 Shows the wind direction graph in Embodiment 1 of the present invention.

[0034] see figure 2 , a method for controlling a wind power generating set includes S210 and S220.

[0035] At S210, when the wind power generating set is on standby, information about an estimated start-up wind direction is obtained.

[0036] Specifically, the start-up wind direction can be estimated based on historical wind direction information. Optionally, the historical wind direction information is collected by the central monitoring system 130 from the wind direction values ​​measured by the wind turbines and calculated according to seasons. For example, the central monitoring system 130 collects the wind direction values ​​measured by each fan at the same time, calculates the average value, plots the average value in the same season on the...

Embodiment 2

[0040] Figure 4 A schematic flowchart showing a control method for a wind power generating set in Embodiment 2 of the present invention.

[0041] Figure 5 A schematic diagram showing the relationship curve between the rotational speed of the generator and the vibration value of the wind power generating set in the second embodiment of the present invention.

[0042] see Figure 4 , a method for controlling a wind power generating set includes S410 and S420.

[0043] S410. Obtain the generator speed of the wind power generating set.

[0044] S420. If the generator speed is within the resonance speed range, set the generator speed setting value as the lower limit value of the resonance speed range.

[0045] The central monitoring system 130 collects the rotation speed value of the generator speed and the vibration value of the fan measured by each fan, wherein the rotation speed value is measured by the rotation speed module, and the vibration value is measured by the vibr...

Embodiment 3

[0051] Figure 6 A schematic flowchart showing a control method for a wind power generating set in Embodiment 3 of the present invention.

[0052] Figure 7 A schematic diagram showing the relationship between the wind direction value and the vibration value in the third embodiment of the present invention is shown.

[0053] Figure 8a It shows the schematic diagram of the force on the blade in the third embodiment of the present invention Figure 1 .

[0054] Figure 8b It shows the schematic diagram of the force on the blade in the third embodiment of the present invention Figure II .

[0055] see Figure 6 , a method for controlling a wind power generating set includes S610 and S620.

[0056] At S610, when the wind power generating set is currently yawing, acquire the current wind direction of the environment where the wind power generating set is located.

[0057] At S620, if the current wind direction is inconsistent with the direction of the nacelle, adjust the...

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Abstract

The embodiment of the invention provides a control method and device of a wind generating set and a wind power plant group control system. The control method comprises the steps that when the wind generating set is in the standby state, information of the forecast starting wind direction is obtained, and the initial yawing position of the wind generating set is adjusted according to the starting wind direction; and / or, the power generator rotation speed of the wind generating set is obtained, and if the power generator rotation speed is in the resonance rotation speed range, the set value of the power generator rotation speed is set as the lower limiting value of the resonance rotation speed range. By the adoption of the technical scheme, the yawing time during starting of the wind generating set is shortened, and / or, the power generator rotation speed of the wind generating set avoids the resonance rotation speed set value, and the vibration value and the fatigue load of the wind generating set are decreased.

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 and a group control system for a wind farm. Background technique [0002] When the wind turbine is in the shutdown state, when the main control system in the wind turbine detects that the current wind speed is greater than the starting wind speed, it will first yaw against the wind, and the time for yaw against the wind is generally longer, about 6 to 10 minutes Affect the start-up time of the unit and cause a certain loss of power generation. This yaw-to-wind time causes relatively little loss of power generation for a single wind turbine at a single startup, but incalculable power loss for multiple wind turbines in a wind farm over a long period of time. [0003] During the rotation of the generator in the wind turbine, due to the uneven distribution of the generator mass, coupled with manufacturing and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/02F03D7/04F03D17/00
CPCF03D7/0204F03D7/0276F03D7/0296F03D7/048F05B2270/321F05B2270/327Y02E10/72
Inventor 马磊李庆江
Owner BEIJING ETECHWIN ELECTRIC
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