Affiliation:
1. Beijing Aircraft Technology Research Institute, Commercial Aircraft Corporation of China, Ltd., Beijing 102211, China
2. College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan 030024, China
Abstract
In this study, the coupled ordinary differential equations for the galloping of the first two modes in iced bundled conductors, including in-plane, out-of-plane, and torsional directions, are derived. Furthermore, through numerical analysis, the critical conditions of this modal galloping are determined in the range of wind speed–sag parameters, and the galloping patterns and variation laws in different parameter spaces are analyzed. The parameter space is then divided into five regions according to the different galloping modes. Under the multimodal coupling mechanism of galloping, the impact of single and two kinds of coupled mode galloping on the spatial nonlinear behavior is explored. The results reveal that the system exhibits an elliptical orbit motion during single mode galloping, while an “8” motion pattern emerges during coupled mode galloping. Moreover, two patterns of “8” motion are displayed under different parameter spaces. This research provides a theoretical foundation for the design of transmission lines.
Funder
Foundation Research (Free Exploration) Youth Program in Shanxi
National Natural Science Foundation of China
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference26 articles.
1. EPRI (1979). Conductor Reference Book: Wind-Induced Conductor Motion, Electric Power Research Institute.
2. Conductor vibration due to sleet;Hartog;Trans. Am. Inst. Electr. Eng.,1932
3. Conductor galloping part II—Torsional mechanism;Nigol;IEEE Trans. Power Appar. Syst.,1981
4. Inertially coupled galloping of iced conductors;Yu;J. Appl. Mech.,1992
5. Stability mechanism of conductor galloping and its application on transmission line;You;Electr. Equip.,2004