Large wind generator individual pitch regulation control method based on LIDAR assistance

A wind turbine and independent pitch-changing technology, which is applied in the control of wind turbines, engine control, wind turbines, etc., to achieve the effects of correcting vibration, improving performance, and relieving fatigue loads

Inactive Publication Date: 2017-12-29
SHENYANG UNIV
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Problems solved by technology

However, none of these methods can solve the constraints of large wind speed disturbance...

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  • Large wind generator individual pitch regulation control method based on LIDAR assistance
  • Large wind generator individual pitch regulation control method based on LIDAR assistance
  • Large wind generator individual pitch regulation control method based on LIDAR assistance

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0042] The laser wind radar system of the present invention first emits laser light to a target position, and after being scattered by the atmosphere, the photodetector receives the scattering signal to realize coherent mixing of the scattering signal and the local oscillator light of the wind measuring radar. The frequency of the coherent signal can be detected, and the radial velocity of the focus of the detected area along the beam direction can be obtained by using the relationship between the frequency value and the wind speed. The wind field measurement at different positions of the altitude layer, the laser radar cycle scanning measurement wind speed simulation such as figure 1 shown.

[0043] step 1:

[0044] The multivariable control of independent pitching includes switching to a feedback controller based on rotor speed, output po...

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Abstract

The invention discloses a large wind generator individual pitch regulation control method based on LIDAR assistance, and relates to a control method of a wind generator. The method comprises the steps that firstly, laser is emitted to a target position and is scattered by the atmosphere; a scattering signal is received by a photoelectric detector, so that coherent frequency mixing of the scattering signal and windfinding radar local oscillation light is realized; therefore frequency of a coherent signal can be detected; by utilizing the relationship between a frequency value and wind speed, radial speed of a focus position of a detected zone along the direction of a light beam is obtained; and meanwhile, the focus position of the laser beam is changed through a focus control device, so that measurement of wind fields of different height levels and different positions is realized. According to the LIDAR assistance individual pitch regulation optimization control system, the wind speed is measured through laser radar new-generation induction equipment; power fluctuation and fatigue load caused by wind disturbance are compensated through feedforward optimization control; and generation power fluctuation and vibration of a tower rack caused by large error of wind speed prediction delay are corrected.

Description

technical field [0001] The invention relates to a control method of a wind power generator, in particular to a method for controlling independent pitch of a large wind power generator based on LIDAR assistance. Background technique [0002] As people pay more and more attention to green energy, wind energy has gradually become one of the most important new energy sources. It is believed that in the near future, common horizontal axis wind turbines will strongly compete with traditional fossil fuel power plants on energy prices. This requires better technology to reduce the price of wind power production, and advanced control systems become the most important part in this case. This is because, on the one hand, by improving the control method of the wind turbine, the unit energy cost can be reduced by maintaining the maximum wind energy utilization efficiency of the wind turbine; on the other hand, the structural fatigue of the wind turbine can be reduced and the operating l...

Claims

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Application Information

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IPC IPC(8): F03D7/04
CPCF03D7/0224F03D7/045F03D7/046F05B2270/32F05B2270/8042Y02A30/00Y02E10/72
Inventor 邵一川赵骞田力威刘颖明王晓东刘懿
Owner SHENYANG UNIV
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