scholarly journals Research on the Wind-induced Dynamic Response Analysis Method of the High-voltage Transmission Tower-line System under Strong Wind

2020 ◽  
Vol 1673 ◽  
pp. 012026
Author(s):  
Junqiang Zhang ◽  
Wentao Feng ◽  
Fei Sheng ◽  
Tao Wang ◽  
Jingyu Zhang ◽  
...  
Keyword(s):  
Dynamic Response ◽  
High Voltage ◽  
Response Analysis ◽  
Strong Wind ◽  
Analysis Method ◽  
Transmission Tower ◽  
Line System ◽  
Dynamic Response Analysis ◽  
High Voltage Transmission

Dynamic Response analysis of Long Span Transmission Tower under Tornado

2012 ◽  
Vol 450-451 ◽  
pp. 1257-1260
Author(s):  
Qiang Gao ◽  
Chao Ren ◽  
Yang Xu ◽  
Zhen Yao Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Dynamic Analysis ◽  
Wind Direction ◽  
Response Analysis ◽  
Transmission Tower ◽  
Dynamic Response Analysis ◽  
Long Span ◽  
Element Method

To study the effects of tornado on long span transmission tower, a model of the tower is built and the features of the tornado are considered. Three different wind cases are discussed in dynamic analysis with finite element method. The analysis results show that dynamic response is more significant at 45° wind direction.

Abnormal Image Monitoring for Transmission Line Based on Digital Image Processing

2013 ◽  
Vol 710 ◽  
pp. 613-616
Author(s):  
Chun Jie Wang ◽  
Bo Xiang Xin
Keyword(s):  
Image Processing ◽  
Transmission Line ◽  
Digital Image Processing ◽  
High Voltage ◽  
Transmission Tower ◽  
Line System ◽  
High Voltage Transmission Line ◽  
Transmission Line Method ◽  
Image Monitoring ◽  
High Voltage Transmission

In the high-voltage transmission line system, the accidents have often occurred, and as a result of power line icing accidents are particularly prominent. In this paper, the author presents a DSP-based image monitoring of high voltage transmission line method. This method is use of high-voltage transmission tower-lines camera to collect the high voltage transmission line image in real time, and directly processing the image in DSP. If wires normal, it will not send pictures to the center and if the abnormal occurred, it will calculate the thickness of ice covering wires, converting the image to JPEG. This article designed and implemented the DSP-based image monitoring of high voltage transmission line algorithm exception, run successfully in the simulation and emulation system which can be used for monitoring of high voltage transmission line icing conditions online.

scholarly journals Wind-Induced Coupling Vibration Effects of High-Voltage Transmission Tower-Line Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-34 ◽  
Author(s):  
Meng Zhang ◽  
Guifeng Zhao ◽  
Lulu Wang ◽  
Jie Li
Keyword(s):  
Wind Speed ◽  
High Voltage ◽  
Coupling Effect ◽  
Static Method ◽  
Transmission Tower ◽  
Design Code ◽  
Coupling Vibration ◽  
Line System ◽  
High Voltage Transmission ◽  
Line Coupling

A three-dimensional finite element model of a 500 kV high-voltage transmission tower-line coupling system is built using ANSYS software and verified with field-measured data. The dynamic responses of the tower-line system under different wind speeds and directions are analyzed and compared with the design code. The results indicate that wind speed plays an important role in the tower-line coupling effect. Under the low wind speed, the coupling effect is less obvious and can be neglected. With increased wind speed, the coupling effect on the responses of the tower gradually becomes prominent, possibly resulting in the risk of premature failure of the tower-line system. The designs based on the quasi-static method stipulated in the current design code are unsafe because of the ignorance of the adverse impacts of coupling vibration on the transmission towers. In practical engineering, when the quasi-static method is still used in design, the results for the design wind speed should be multiplied by the corresponding tower-line coupling effect amplifying coefficient δ.

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