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Yawing optimization method of large wind turbine generator system under condition of strong wind

A technology of wind turbines and optimization methods, applied in the control of wind turbines, wind turbines, wind power generation, etc., can solve problems such as loss of power generation, slow yaw speed, etc., reduce downtime, and be widely used. Effect

Inactive Publication Date: 2017-08-08
CECEP WIND POWER ZHANGBEI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the yaw speed is very slow, usually 0.3-0.5° / s, and the yaw circle takes about 12-20 minutes, if the machine is frequently stopped and unmoored during strong winds, it will cause a large loss of power generation

Method used

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  • Yawing optimization method of large wind turbine generator system under condition of strong wind
  • Yawing optimization method of large wind turbine generator system under condition of strong wind
  • Yawing optimization method of large wind turbine generator system under condition of strong wind

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Embodiment Construction

[0022] Since the power of the unit and the wind speed are related by the third power, that is

[0023]

[0024] Among them, P is the power captured by the wind rotor, ρ is the air density, A is the swept area of ​​the wind rotor, v p is the actual wind speed received by the wind rotor. When there is a deviation between the position of the nacelle and the wind direction, the angle between the position of the nacelle and the wind direction is called the windward error ξ:

[0025] ξ=θ m -θ n (2)

[0026] Among them, θ m is the wind direction, θ n is the position of the nacelle, ξ is the error against the wind, such as figure 1 shown.

[0027] Due to the existence of the included angle, power generation loss will occur, and the wind rotor actually receives the wind speed v p The relationship with the wind speed v of the wind wheel is as follows:

[0028] v p =v cosξ (3)

[0029] Therefore, the actual power P of the wind rotor is:

[0030]

[0031] According to t...

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Abstract

The invention relates to a yawing optimization method of a large wind turbine generator system under the condition of strong wind. The method comprises the steps that an automatic wind coping strategy is adopted, and the wind velocity is divided into the strong wind yawing wind velocity and the weak wind yawing wind velocity; a strong wind coping strategy is adopted for the strong wind yawing wind velocity, wherein according to the expression of the strong wind coping strategy, |epsilon| is larger than |epsilon 2|; a weak wind coping strategy is adopted for the weak wind yawing wind velocity, wherein according to the expression of the weak wind coping strategy, |epsilon| is larger than |epsilon 1|, and |epsilon 1| is larger than |epsilon 2|; when the wind coping error epsilon meets the yawing starting condition, the yawing operation is conducted to track the wind direction so as to conduct wind coping, and the coping wind yawing direction is determined according to the wind coping error epsilon; and when an engine compartment rotates by a preset angle, a cable in a tower tube is twisted, cable untwisting optimization is conducted at the same time, the system can conduct multiple yawing operation during the weak wind period, and conduct little yawing operation and multiple power generation operation during strong wind period. By the adoption of the yawing optimization method of the large wind turbine generator system under the condition of strong wind, the time of shutdown caused by cable untwisting of the system during the strong wind period can be shortened, the loss of generated energy is effectively avoided, and the method can be widely applied to the wind power industry.

Description

technical field [0001] The invention relates to the field of renewable energy, in particular to a method for optimizing the yaw of a large-scale wind power generating set under the condition of strong wind. Background technique [0002] In 2016, the installed capacity of wind power in China was 23.37 million kilowatts, and the cumulative installed capacity reached 169 million kilowatts; among them, the newly installed capacity of offshore wind power was 590,000 kilowatts, and the cumulative installed capacity was 1.63 million kilowatts. Wind power has surpassed nuclear power to become the third major power source after coal power and hydropower. With the increasing installed capacity of wind power, how to increase power generation under limited conditions is the tireless goal pursued by designers in the wind power industry. [0003] The wind rotor of the wind turbine is driven by the wind to drive the gearbox and generator on the transmission chain to convert wind energy in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04
CPCF03D7/04Y02E10/72
Inventor 李群星史晓鸣杨怀强王柱张峰吴亚飞柳黎明
Owner CECEP WIND POWER ZHANGBEI
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