1. Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China；
2. China State Construction Hailong Technology Co., Ltd., Shenzhen 518000, China；
3. Economy Research Institute, State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310008, China
Abstract：Power transmission lines often run through steep and complex terrains such as canyons and mountains. The field measurement on ice shedding of power transmission lines is costly and it is difficult to ensure the measurement accuracy. In addition, it is also difficult for indoor scale model tests to reproduce natural terrain and meteorological conditions. In order to achieve efficient and low-cost field measurement, a multi-bundled conductor segment model is originally developed for simulating ice-accretion and ice-shedding processes of a 500 kV high-voltage transmission line based on the modal superposition method and dynamic similarity relationship. A spring system is designed to provide adjustable vertical, horizontal and torsional stiffness for simulating the three-degree-of-freedom dynamic characteristics of the prototype transmission line. The conductor segment model device is set up at the site of the 500 kV high-voltage transmission line, and the effectiveness of the model device for simulating the displacement response due to ice shedding is verified by conducting artificial ice-shedding tests. Three real processes of icing and ice-shedding of conductors are captured by the computer vison monitoring based on the multi-bundled conductor segment model device under the nature wind and ice meteorological environment. It provides a new technical means for the field experiment of ice-accretion and ice-shedding processes of multi-bundled conductors.
