Journal of Shandong University(Engineering Science) ›› 2023, Vol. 53 ›› Issue (6): 108-121.doi: 10.6040/j.issn.1672-3961.0.2023.080

• Electrical Engineering • Previous Articles     Next Articles

Dynamic response parameters of wind turbine under thunderstorm downburst

Chuncheng LIU(),Qingxun TENG*()   

  1. School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, Jilin, China
  • Received:2023-04-24 Online:2023-12-20 Published:2023-12-19
  • Contact: Qingxun TENG E-mail:lccheng@neepu.edu.cn;teng2022@yeah.net

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Abstract:

In order to study the time-domain characteristics of the impact wind of mobile thunderstorms and the characteristics of the dynamic response parameters of wind turbines under their action, the wind speed time history of the impact wind of mobile thunderstorms was first simulated using the harmonic superposition method. The finite element model of fan structure considering the coupling effect of blade and tower tube was established, and then the response distribution laws of acceleration, displacement, section stress and shear force along the height direction of tower tube were obtained. The acceleration and displacement responses of the blades and the tower were further analyzed considering the different blade stall angles when the fan was stopped. Considering the influence of different wind directions on the wind turbine, the frequency domain characteristics of the dynamic response were analyzed, and the variation patterns of vibration mode participation coefficient, tower top displacement and acceleration, and tower bottom bending moment amplitude with frequency were given. Research showed that the wind speed time history of a moving thunderstorm impact wind included two distinct peaks (0-T/3, T/3-T/2). The variation of the displacement response peak at different blade stop angles was closely related to the height of the location. The frequency of thunderstorm impact wind load and the first order dominant frequency (around 0.230 Hz) had a significant impact on the structural displacement and section bending moment amplitude.

Key words: downburst, wind turbine, tower tube, wind speed time history, dynamic response

CLC Number: 

  • TU311

Fig.1

Radial average wind speed vertical wind profile curve"

Fig.2

Time history curve of radial average wind speed"

Fig.3

Time history curve of average wind speed of moving thunderstorm"

Fig.4

Time history curve of radial fluctuating wind speed"

Fig.5

Time history curve of radial composite wind speed"

Fig.6

Correlation function curve"

Fig.7

Power spectral density curve"

Fig.8

Position of thunderstorm wind center and wind turbine"

Fig.9

Influence of moving speed on average wind speed and fluctuating wind speed"

Fig.10

Influence of radial distance on average wind speed and fluctuating wind speed"

Fig.11

Influence of forward distance on average wind speed and fluctuating wind speed"

Fig.12

Influence of lateral distance on average wind speed and fluctuating wind speed"

Table 1

Tower size parameters  单位: m"

段号 高度 顶端内径 底端内径 顶端厚度 底端厚度
1 19.72 3.330 3.338 0.145 0 0.133 0
2 19.20 3.338 3.752 0.133 0 0.152 0
3 16.80 3.752 4.103 0.152 0 0.173 5
4 16.80 4.103 4.051 0.173 5 0.199 5
5 14.40 4.051 4.070 0.199 5 0.348 0

Fig.13

Wind turbine structure"

Fig.14

Finite element model of wind turbine"

Fig.15

Thunderstorm impact wind load"

Fig.16

Wind turbine top dynamic response"

Fig.17

Blade top dynamic response"

Fig.18

Shear force and bending moment at tower bottom"

Fig.19

Distribution of different response characteristics along tower height"

Fig.20

Blade top acceleration, velocity and displacement"

Fig.21

Acceleration, velocity and displacement of tower top"

Fig.22

Shear force, bending moment and stress tower bottom"

Fig.23

Stopping angle of wind turbine"

Fig.24

Influence of fan stall angle change on blade acceleration and displacement"

Fig.25

Frequency domain characteristic curve of wind turbine"

Table 2

Frequenciesand vibration modes of the first eight order"

阶数 频率 振型描述
1 0.229 塔筒一阶侧向弯曲及叶片摆振
2 0.234 塔筒一阶正向弯曲及叶片挥舞
3 0.813 叶片挥舞
4 1.109 塔筒二阶侧向弯曲及叶片摆振
5 1.372 塔筒二阶正向弯曲及叶片挥舞
6 3.484 塔筒三阶侧向弯曲及叶片摆振
7 3.637 塔筒三阶正向弯曲及叶片挥舞
8 4.439 叶片摆振
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