Calculation model and experimental verification of equivalent ice thickness on overhead lines with tangent tower considering ice and wind loads

Authors：Dong, Bingbing^*; Jiang, Xingliang; Xiang, Ze

Source：Cold Regions, Science and Technology, 2022, 200: 103588.

DOI：10.1016/j.coldregions.2022.103588

• Ice and wind loads
• Transmission line
• Equivalent ice thickness model
• Experimental verification

Overhead line icing will seriously affect the safety of power grid. Accurately predicting the ice thickness on power lines is a persistent research problem. Accurate prediction is essential for the anti-icing/de-icing measures of power grid and prevention of serious ice accidents. Based on fluid mechanics theory, a simulation model for the aerodynamic characteristics of the typical icing section of conductor is established. The influence of wind attack angle, wind speed, ice thickness and section shape on the aerodynamic parameters (lift and drag coefficients) is analysed. Combined mechanics principle and conductors icing characteristics, a calculation model of equivalent ice thickness on transmission lines with a tangent tower is developed. The tension and inclination angle of insulator suspension point to tangent tower, as well as the ice and wind load characteristics are considered. Based on the field data from the State Field Scientific Observation and Research Station of Xuefeng Mountain Energy Equipment Security of Chongqing University, it is verified that the results of proposed model strongly agree with the actual measurements. The model can meet the requirements of the engineering applications, with the deviation of all the results less than 10%. The theoretical reference for the design, construction, operation and maintenance of anti-icing and mitigation with power infrastructure can be provided.

• Institution
  重庆大学