498 / 2022-03-21 16:07:11

Displacement and Stress analysis of 10 kV iced overhead lines based on finite element method

ice thickness; wind speed; wind direction angle; wire stress; wire displacement

IEEE ICHVE 2022 / 1-PAGE ABSTRACT

Displacement and Stress analysis of 10 kV iced overhead lines based on finite element method

Yushun Zhao¹,Chengcheng Liao¹, Yixian Dai¹, Bin Du¹, Qiang Li²,Mingming Dai<sup>2

1</sup>School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, China

²State Grid BoZhou Electric Power Supply Company, Hefei, China

yushunzhao@126.com , 1561686918@qq.com , daiyixian@foxmail.com

dubin@hfut.edu.cn , 924081734@qq.com , daimm9887@163.com

Purpose/Aim

At the moment, the research on the galloping of iced lines is mainly aimed at 110kV and above lines, and there is less research on the galloping of 10kV lines after icing, so the research on the galloping of 10kV lines after icing is more valuable.

Experimental/Modeling methods

The density of ice and wire, Young's modulus and Poisson's ratio parameters are used in the study, which are obtained by searching the data. Geometric modeling related operations in COMSOL multiphysics software are used for modeling.

Results/discussion

After the icing of 10kV line, the displacement and maximum stress of conductor are related to wind speed, wind direction angle and icing thickness. This is consistent with the existing results and theories.

Conclusions

(1) Under the same icing thickness: with the increase of wind direction angle, the displacement amplitude and maximum stress of conductor first increase and then decrease, it reaches the maximum when the wind direction angle is 90°, because the wind blows vertically towards the conductor at 90°; at the same wind direction angle, the displacement amplitude and maximum stress of the conductor increase with the increase of wind speed.

(2) When the wind speed is low, no matter how the ice thickness and wind direction change, the displacement amplitude and the maximum stress of the wire are basically unchanged; when the wind speed increases, the displacement amplitude and the maximum stress of the conductor begin to change with the changes of wind speed, wind direction angle and ice thickness.

(3) When the wind direction angle is constant: the displacement amplitude and the maximum stress of the conductor are hardly affected by the ice thickness and wind speed under low wind speed conditions, but are only related to the ice thickness and wind speed when the wind speed value is large.