Control method and control system of wind turbine generator

A technology for a wind turbine and a control method, which is applied to the control of wind turbines, wind turbines, and wind energy power generation, etc., can solve the problem of low utilization rate of wind energy, and achieve the goal of improving the utilization rate of wind energy, increasing power generation, and broadening the range of constant rotational speed. Effect

Active Publication Date: 2013-09-11
SINOVEL WIND GRP
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Problems solved by technology

In the existing technology, the pitch angle of the unit is maintained at a certain position before the wind turbine is connected to the grid for power generation, passively waiting for the generator speed to rise until the grid connection condition is met, and the utilization rate of wind energy is not high

Method used

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  • Control method and control system of wind turbine generator
  • Control method and control system of wind turbine generator

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Embodiment Construction

[0017] figure 1 It is a schematic flowchart of a control method for a wind power generating set provided by an embodiment of the present invention. An embodiment of the present invention provides a control method for a wind power generating set, which includes:

[0018] Step 110, detecting wind speed and generator speed;

[0019] Step 120: When it is judged that the wind speed has reached the first wind speed threshold and the generator speed has not yet reached the first speed threshold, output a pitch change control command to the pitch change frequency converter of the wind power generating set to change the blade angle ;

[0020] Step 130 , when it is determined that the generator speed reaches the first speed threshold, output a control instruction for performing grid-connected operation to the generator inverter.

[0021] In order to avoid wind turbines idling for a long time, the wind turbine control method provided by the embodiment of the present invention fine-tune...

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Abstract

The invention provides a control method and a control system of a wind turbine generator. The control method comprises the steps as follows: the wind speed and the rotation speed of a generator are detected; when the wind outlet speed reaches a first wind speed threshold value and the rotation speed of the generator does not reach a first rotation speed threshold value, a variable pitch control instruction for controlling and changing a blade angle is output to a variable pitch frequency converter of the wind turbine generator; and when the rotation speed of the generator is judged to reach the first rotation speed threshold value, a control instruction for executing grid-connected operation is output to a generator frequency converter. According to the control method and the control system of the wind turbine generator, the wind speed and the rotation speed of the generator are detected, the variable pitch is controlled before grid-connected generation of the generator, and an optimal attack angle is tracked furthest, so that the utilization rate of wind energy is improved.

Description

technical field [0001] The invention relates to a control technology of a wind power generator set, in particular to a control method and a control system of a wind power generator set, and belongs to the technical field of wind power generation. Background technique [0002] The world is rich in wind resources, but the distribution is uneven. The areas with high wind speed are relatively small, while the areas with low wind speed are widely distributed. How to utilize the wind energy resources in these areas will become the key to the future wind power generation technology. [0003] At present, high-power wind turbines are mostly used in wind farms with high wind speed and good wind resources. If they are applied to low wind speed wind areas, the economy of the unit will be reduced, the cost of power generation will be increased, and the return on investment will be greatly reduced. Therefore, it is one of the key technologies to develop low wind speed wind turbines to con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 杨明明杨松李磊何荣光席盛代
Owner SINOVEL WIND GRP
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