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High-efficiency wind generator system and control method thereof

A technology of a wind power generation system and a control method, which is applied in the control of wind turbines, monitoring of wind turbines, wind energy power generation, etc., can solve the problems of reduced system efficiency, fluctuations in system output power, and fluctuations that cannot be completely self-digested, so as to achieve protection Pitch system, smooth output power, reduce the effect of frequent pitch action

Active Publication Date: 2019-01-15
ZHEJIANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the research found that the system efficiency is lower than that of pure gear transmission due to the introduction of hydraulic system. At the same time, although the pure hydraulic system can control the fluctuating torque without passing through the gear system, the fluctuation cannot be completely digested by itself, and finally transmitted to the power generation. The machine part, the system output power fluctuates

Method used

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  • High-efficiency wind generator system and control method thereof
  • High-efficiency wind generator system and control method thereof
  • High-efficiency wind generator system and control method thereof

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Embodiment 1

[0044] Refer to attached figure 1 and 2 , a high-efficiency wind power generation system, which includes a lidar wind measuring instrument placed on the nacelle (not shown in the figure), and a mechanical-hydraulic (secondary adjustment) hybrid transmission system placed in the nacelle. The mechanical-hydraulic (secondary adjustment) hybrid transmission system includes an impeller 1 and a pitch mechanism, a speed-increasing planetary gear train 2, a split-merge device 30, a synchronous generator 4, a speed-regulating hydraulic system 50 and a secondary-regulating hydraulic system 60 .

[0045] Wherein, the impeller 1 is connected with the input shaft of the speed-increasing planetary gear train 2 . The impeller 1 captures wind energy and drives the speed-up planetary gear train 2 to rotate, increasing the output speed of the speed-up planetary gear train 2 to a certain value. The speed-increasing planetary gear train 2 transmits energy to the synchronous generator 4 through...

Embodiment 2

[0052] A high-efficiency wind power generation system control method.

[0053] Refer to attached image 3 , the laser radar anemometer measures the wind speed and wind direction information at a distance L in front of the impeller, and acquires a data at a fixed time (for example, 1s or less) and sends it back to the controller at a sampling time determined by the system sampling rate. Sampling data is set in the controller with M data storage queues (N data in each column), and the data enters the queues according to the principle of first in first out. The next step can only be performed after the data in the array is full.

[0054] Refer to attached Figure 4 According to the source of wind measurement error, spatial weighted average, azimuth error, measurement average error, white noise, etc., preliminary processing is performed on the data, and the continuous fluctuating wind speed curve is obtained by moving average fitting.

[0055] Refer to attached Figure 5 , per...

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Abstract

The invention discloses a high-efficiency wind generator system and a control method thereof. The system comprises a laser radar wind meter arranged on a cabin and a mechanical-hydraulic (secondary adjustment) hybrid transmission system arranged in the cabin; the mechanical-hydraulic hybrid transmission system comprises an impeller, a speedup planetary gear, a diversion and confluence device, a synchronous generator, a speed regulation hydraulic system and a secondary adjustment system; the impeller is connected with an input shaft of the speedup planetary gear train; the diversion and confluence device comprises a first gear pair, a planetary gear and a second gear pair; the planetary gear comprises a planet carrier, a sun gear and a tooth ring; the speed regulation hydraulic system comprises a variable hydraulic pump, a quantitative hydraulic motor and a fuel tank; the secondary adjustment system comprises a secondary component and an accumulator; and the secondary component is coaxially connected with the quantitative motor. The laser radar wind meter and the mechanical-hydraulic hybrid transmission system enable high efficiency and smooth output power of the wind generator system by wind signal processing and corresponding control motions.

Description

technical field [0001] The invention belongs to the field of new energy systems, and in particular relates to a high-efficiency wind power generation system and a control method thereof. Background technique [0002] The continuous increase of world energy consumption has made the energy crisis on a global scale more and more obvious. The development of renewable energy to alleviate the energy crisis and realize the sustainable development of energy has become a major measure of energy development in countries all over the world. Due to the huge reserves, renewable, wide distribution and non-polluting characteristics of wind energy in the world, wind power has become an important direction of world energy development. In recent years, the installed capacity of wind power generators in the world has grown at an average annual rate of about 30%. As a major country of fossil energy consumption, China faces serious environmental pollution crisis caused by fossil fuel power gene...

Claims

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Application Information

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IPC IPC(8): F03D17/00F03D80/00F03D15/00F03D7/04
CPCF03D7/0236F03D7/0268F03D7/04F03D15/00F03D17/00F03D80/00Y02E10/72
Inventor 陈文婷孟浩林勇刚刘航刘宏伟李伟
Owner ZHEJIANG UNIV
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