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An Accurate Simulation Algorithm for Wind Turbine Blade Echo

A wind turbine and simulation method technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as unseen wind turbine echo solution technology, solution distortion, erroneous calculation redundancy, etc., to solve wind farm engineering design problems , Realize accurate solution and avoid the effect of echo distortion

Active Publication Date: 2022-04-08
CHINA THREE GORGES UNIV +1
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Problems solved by technology

The echoes obtained from this simulation must have theoretical misunderstandings and calculation redundancy, resulting in solution distortion
[0004] In summary, there is currently no wind turbine echo solution technology based on discrete scattering points and their echo equations.

Method used

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  • An Accurate Simulation Algorithm for Wind Turbine Blade Echo
  • An Accurate Simulation Algorithm for Wind Turbine Blade Echo
  • An Accurate Simulation Algorithm for Wind Turbine Blade Echo

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Embodiment

[0055] Next, the blade simulation model is established with the actual size of the wind turbine "EnerconE-66". Among them, the length of the wind turbine blades is L=26m, the number of blades is 3, the rotation speed of the wind turbine blades around the coordinate origin is ω=20r / min, and the initial angle between the blades and the y-axis is 90°. The axial distance between the radar and the blades of the wind turbine is R=1000m, and the azimuth and pitch angles of the radar satisfy α=β=90°. The radar transmission signal is a single pulse signal, the transmission frequency is f=1GHz, the pulse width is 1us, and the pulse repetition frequency is PRF=1000Hz. In order to facilitate the analysis of the time-frequency domain diagram of the wind turbine echo, the simulation time is set to 3s, that is, one blade rotation period.

[0056] It should be pointed out that all the simulations of the present invention are carried out on a personal computer. The computer model is Lenovo Q...

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Abstract

An accurate simulation algorithm for wind turbine blade echoes aims to accurately obtain wind turbine blade echoes. The method is mainly divided into three parts, one is to construct the continuous electromagnetic scattering point model of the blade based on the centerline of the wind turbine blade, and the other is to determine the minimum geometric distance between adjacent effective electromagnetic scattering points based on the radar’s ability to distinguish the scattering point, and then Obtain the effective electromagnetic scattering points of the blades with discrete characteristics for solving the echo of wind turbine blades. The third is to establish a corresponding coordinate system to solve the distance between the radar and the effective electromagnetic scattering points of the blades, so that according to the radar equation, vector superposition is used method to solve the wind turbine blade echo. The invention can be used for simulating the echo of the blade of the wind generator, so as to accurately obtain the Doppler characteristics of the echo of the wind generator, and is of great significance to the site selection and array design of the wind farm and the clutter suppression of the wind farm.

Description

technical field [0001] The invention relates to an accurate simulation algorithm of wind turbine blade echo, which belongs to the engineering field of wind farm site selection and array design under the condition that wind farms interfere with adjacent electronic facilities. Background technique [0002] With the emphasis on the development of clean energy and the continuous construction of electronic facilities around the world, the passive interference of wind farms to adjacent electronic facilities, such as radar and other signals, has become a research hotspot at home and abroad. Judging from the existing research, retrofitting wind turbines from the wind turbine side, painting absorbing materials, and even banning the construction of wind farms cannot effectively solve the problem of passive interference of wind farms to adjacent electronic facilities. At present, scholars at home and abroad are more inclined to study the unique Doppler characteristics in the interferen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/414G01S7/415G01S7/418
Inventor 唐波郝斌黄力杨嘉炜
Owner CHINA THREE GORGES UNIV
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