Influence of acceleration effect on wind-induced response of transmission lines under upward wind action

Abstract

The upward wind caused by the blockage and diversion of the mountain significantly influences the wind-induced response of the insulator strings and transmission lines located on the uphill or the top of the mountain. Based on the CFD （computational fluid dynamics） numerical simulation technology， this paper carries out numerical simulation of generalized flow field around the mountain with different incoming wind fields， different mountain slopes and different mountain heights. Furthermore， it analyzes the variation law of the acceleration ratio of wind speed in all directions and obtains through calculation the wind-induced response of the insulator strings and conductors. The research results show that with the increase of the mountain height， the wind-induced response of the insulator strings and conductors is increasing. When monitored at a point of 0.8 times as high as the mountain， the wind-induced response has exceeded the standard value； with the increase of mountain slope， the wind-induced response of insulator strings and conductors increases significantly.

Keywords

• upward wind
• cfd numerical simulation
• wind speed acceleration ratio
• insulator string
• conductor
• wind-induced response