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Wind measuring system adopting variable frequency laser wind measuring radar and variable frequency control method

A technology of laser radar and wind-measuring radar, which is applied in the direction of radio wave measurement system, engine control parameters, measurement devices, etc., can solve problems such as untimely control, fan operation in the best state, and fan operation risk, so as to improve the effectiveness Effect

Pending Publication Date: 2017-05-31
杭州赛尤新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the lidar used in real-time control must transmit the wind speed data ahead to the wind turbine in real time, otherwise the wind turbine control cannot receive the wind speed data in time, which will lead to untimely control, which will cause risks to the operation of the wind turbine or fail to make the wind turbine run at its best
The current laser radar is based on a fixed laser beam switching frequency, and the two laser beams emit laser beams forward alternately at a fixed time interval. When measuring, the probability of data being blocked is 20-30%, and the effective rate of data is usually only 60-85% (the lidar uses some algorithms to filter and process the data when it is blocked, but due to the wind turbine's paddle The rotation speed of the leaf changes, and in the worst case, the data efficiency of the lidar will be very low), and in the extreme case, the data efficiency will even drop below 20%

Method used

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  • Wind measuring system adopting variable frequency laser wind measuring radar and variable frequency control method
  • Wind measuring system adopting variable frequency laser wind measuring radar and variable frequency control method
  • Wind measuring system adopting variable frequency laser wind measuring radar and variable frequency control method

Examples

Experimental program
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Embodiment 1

[0038] Embodiment 1: as figure 1 As shown, this embodiment is a wind measurement system using a frequency-variable laser wind measurement radar, including a radar controller, a rotational speed sensor and a laser wind measurement radar 3 connected to the radar controller circuit.

[0039] Such as figure 2 As shown, in this example, the wind laser radar 3 is installed on the top of the wind turbine nacelle 1, and the wind laser radar 3 emits laser beam A and laser beam B alternately forward at a horizontal angle. The angle between the beam A and the laser beam B is set so that the blades 2 of the wind turbine block at most one laser beam path of the laser wind radar at the same time.

[0040] In this embodiment, the speed sensor is installed on the high-speed rotating shaft end or the low-speed rotating shaft end of the wind power generator, and can transmit the speed of the wind power generator to the radar controller of the laser wind radar 3 .

[0041] The frequency conve...

Embodiment 2

[0053] Embodiment 2: as Figure 5 As shown, this embodiment is basically the same as Embodiment 1, except that the radar controller circuit is connected to the blade position monitoring in this embodiment.

[0054] In this example, the blade positioning monitoring device includes a signal transmitting device 42 and a signal receiving device 41 (such as an infrared emitting device, a receiving device; or an approaching body, a Hall sensor, etc.), such as Figure 6 As shown, the signal transmitting device 42 is fixedly installed on the wind wheel 2, and the signal receiving device 41 is fixedly installed on the top of the nacelle 1. When and only when the wind wheel 2 rotates to a specified position, the signal sent by the signal transmitting device 42 will be received. The signal receiving device 41 receives it.

[0055] In this embodiment, the method for obtaining the relative position information of the blade on the impeller and the laser beam A and laser beam B is as follow...

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Abstract

The invention relates to a wind measuring system adopting a variable frequency laser measuring radar and a variable frequency control method, and aims at providing the wind measuring system which is simple in structure and low in cost and adopts the laser wind measuring radar of variable switch frequency, so that two laser beams of the laser wind measuring radar always penetrates through gaps in the middle of blades but are not shielded, and the effectiveness of data measured by the laser wind measuring radar is improved. According to the technical scheme, the wind measuring system comprises a rotating speed sensor, a blade position sensor, the wind measuring radar and a radar controller. The rotating speed sensor is installed on a rotating shaft of a wind driven generator, and is used for obtaining impeller rotating speed information; the blade position sensor is used for monitoring whether the blades on an impeller of the wind driven generator reaches a specific position or not; the laser wind measuring radar is installed on the top of a cabin of the wind driven generator, and alternately emits a laser beam A and a laser beam B to the front of the wind driven generator with a certain included angle; the radar controller is connected to the rotating speed sensor, the blade position sensor and the laser wind measuring radar.

Description

technical field [0001] The invention relates to a wind measurement system and a frequency conversion control method using frequency conversion laser wind measurement radar. Applicable to the field of wind power generation. Background technique [0002] Wind energy is an inexhaustible renewable and clean energy. Using wind power to generate electricity can reduce environmental pollution and save the consumption of conventional energy such as oil and coal. Therefore, countries all over the world pay more and more attention to the use of wind power to generate electricity and develop new energy sources. [0003] The control of wind turbines has always been to use the anemometer installed on the wind generator and the power and torque of the fan to control the blade angle and speed of the wind generator. Since the anemometer is installed behind the wind wheel of the wind generator , so the measured wind speed and wind direction can only be measured after the wind blows to the ...

Claims

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Application Information

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IPC IPC(8): G01S17/95G01S7/48
CPCG01S7/48G01S17/95F05B2270/32Y02A90/10
Inventor 蔡涛
Owner 杭州赛尤新能源科技有限公司