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Continuous wave laser coherent wind finding radar system of wind turbine

A technology for wind turbines and radar systems, which is applied in radio wave measurement systems, electromagnetic wave re-radiation, measurement devices, etc., can solve the problems of wind turbine damage, influence, and influence on wind utilization rate of wind turbines, so as to improve efficiency and high safety. , The effect of reducing fan load

Pending Publication Date: 2019-12-03
SHANXI UNIV
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Problems solved by technology

In the field of wind power generation, if the orientation and wind direction of the fan are not in the same direction, it will seriously affect the wind utilization rate of the fan; when the strong wind comes, if the fan is not protected in time, it may cause damage to the fan; when the fan blade rotates Creates an invisible wake that affects wind gauges placed behind it

Method used

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  • Continuous wave laser coherent wind finding radar system of wind turbine
  • Continuous wave laser coherent wind finding radar system of wind turbine
  • Continuous wave laser coherent wind finding radar system of wind turbine

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Embodiment Construction

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] Such as figure 1 as shown, figure 1 It is a wind turbine continuous wave laser coherent wind radar system provided by the present invention, including:

[0019] Laser, optical polarization controller, acousto-optic frequency shifter, ring optical device, optical antenna, mixer, detector, amplifier, AD sampler and signal processor; the coupler includes a first coupler, a second coupler and The third coupler; the mixer includes a first mixer and a second mixer; the ring light path device includes a first ring light path device and a second ring light path device; the optical antenna includes a first optical antenna, a second optical antenna, a third optical antenna and a fourth optical antenna;

[0020] Among th...

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Abstract

The invention relates to a continuous wave laser coherent wind finding radar system of a wind turbine. Continuous wave laser is sent to the atmospheric space to measure the atmospheric wind field at afixed area distance by using fixed-focus characteristics of an optical antenna. The continuous wave laser wind finding radar also adopts the Doppler effect of the laser. Since the beam is always present during laser measurement, the accuracy and resolution of wind speed measurement of the continuous wave laser wind finding radar are very high, usually up to the accuracy of speed measurement of centimeter per second to millimeter per second. The continuous wave laser wind finding radar has the technical advantages of relatively simple system construction, relatively low price, high safety andhigh measurement accuracy. The continuous wave laser coherent wind finding radar system provided by the invention can be used to realize the measurement of the atmospheric wind field in the fixed areain front of the fan, and provide accurate data support for the functions such as fan yaw control, fan load reduction, auxiliary fan master control and efficiency curve test, thereby effectively improving the efficiency of the wind turbine.

Description

technical field [0001] The invention relates to the technical field of equipment early warning, and more specifically relates to a wind turbine continuous wave laser coherent wind radar system. Background technique [0002] With the large-scale development of wind turbines and the implementation of wind power grid parity policy, cost reduction, quality improvement, efficiency increase, and safety are issues that need to be solved urgently in the future development of wind power. Intelligent wind turbines can realize the intelligent perception of wind conditions by wind turbines, which requires accurate and timely measurement of the wind field information in front of the wind turbine blades (ie, wind speed and wind direction), and based on the real-time wind field information, the wind turbine yaw The pitch changes and the main control system performs corresponding actions. In the field of wind power generation, if the orientation and wind direction of the fan are not in the...

Claims

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Application Information

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IPC IPC(8): G01S17/95G01S17/58G01S7/481
CPCG01S17/95G01S17/58G01S7/4814Y02A90/10
Inventor 王灵梅孟恩隆贾成真阎卓民王强郭东杰刘玉山马维光张雷董磊尹少平程江涛
Owner SHANXI UNIV
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