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Laser radar auxiliary control method based on impeller equivalent wind speed correction

A technology equivalent to wind speed and laser radar, which is applied in the control of wind turbines, monitoring of wind turbines, engine control, etc., can solve the problems of inaccurate time and achieve the effect of reducing numerical deviations

Active Publication Date: 2020-07-10
ZHEJIANG WINDEY
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Problems solved by technology

[0004] In order to overcome the problems in the prior art that the feed-forward equivalent wind speed provided by the airborne laser radar is affected by the evolution of wind speed, the deviation from the actual equivalent wind speed at the wind turbine rotor of the wind power generator is too large or the radar feed-forward is equivalent. The time when the wind speed arrives at the wind turbine surface of the wind turbine is not accurate enough. It provides a method that can reduce the deviation between the feed-forward equivalent wind speed provided by the airborne laser radar and the actual equivalent wind speed at the wind turbine rotor, and improve the actual wind turbine. The time accuracy at the wind wheel and the lidar-assisted control method based on the equivalent wind speed correction of the impeller to improve the radar-assisted control effect

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  • Laser radar auxiliary control method based on impeller equivalent wind speed correction
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  • Laser radar auxiliary control method based on impeller equivalent wind speed correction

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0066] like figure 1 The illustrated embodiment is a lidar-assisted control method based on impeller equivalent wind speed correction, including the following steps:

[0067] Step S100, such as figure 2 As shown, the aerodynamic torque of the wind turbine rotor surface is reconstructed based on the Lomberg observer;

[0068] Step S101, based on the double-mass model, regards the aerodynamic torque as the equivalent disturbance, selects the design parameters and operating parameters of the wind turbine, and takes the wind rotor speed ω r , generator speed ω g , low-speed shaft torque T ls is the state variable of the observer, and the generator electromagnetic torque T e As an input quantity, a state-space model of the wind turbine is established

[0069]

[0070] In the formula, C d is the low-speed shaft stiffness, k d is low-speed shaft...

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Abstract

The invention discloses a laser radar auxiliary control method based on impeller equivalent wind speed correction. The method comprises the following steps of reconstructing wind wheel surface aerodynamic torque of a wind generating set based on a luenberger observer; calculating current wind wheel surface equivalent wind speed of the wind generating set based on a newton method; calculating feedforward equivalent wind speed based on airborne laser radar; correcting laser radar feedforward equivalent wind speed time lag sequence; correcting laser radar feedforward equivalent wind speed numbersequence; and carrying out laser radar auxiliary control by using a laser radar auxiliary controller. The method has the following beneficial effects that the number deviation between the feedforwardequivalent wind speed provided by the airborne laser radar and the actual equivalent wind speed of a wind wheel of the wind generating set can be reduced, the actual time precision of the wind wheel of the wind generating set is improved, and the radar auxiliary control effect is improved.

Description

technical field [0001] The present invention relates to the technical field of wind power generator control, in particular to a method capable of reducing the numerical deviation between the feed-forward equivalent wind speed provided by an airborne laser radar and the actual equivalent wind speed at the wind rotor of a wind power generator, and improving the actual wind power of a wind power generator. The time accuracy at the impeller, and the lidar-assisted control method based on the impeller equivalent wind speed correction to improve the radar-assisted control effect. Background technique [0002] With the development of wind power technology, the application of airborne lidar is becoming more and more extensive. The airborne lidar senses the incoming wind speed in front of the wind turbine, and after processing, it forms the equivalent wind speed of the front feed of the wind rotor, which is used as the input of the radar auxiliary controller. However, the wind rotor...

Claims

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Application Information

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IPC IPC(8): F03D7/00F03D17/00G06F17/10
CPCF03D7/00F05B2270/32F05B2270/328F05B2270/8042F03D17/00G06F17/10Y02E10/72
Inventor 孙勇杨翀应有陈棋李照霞
Owner ZHEJIANG WINDEY
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