Paper Info
Title
Calculation Method for Dynamic Stiffness of Multispan Overhead Transmission Lines
Abstract
The dynamic motion of a span is coupled to the other spans in transmission lines. From the continuity conditions, force equilibrium conditions, and dynamical equations of every span conductor and insulator string, a close-form expression for the dynamic stiffness of a coupled two spans in harmonic motion is presented. Unlike some existing theories of single span conductor, the effect between the conductors and insulator strings is considered here. By means of example calculations, the validity of the dynamic stiffness of two-span is demonstrated by the consistency of the results determined by the ABAQUS. Meanwhile, the dynamic stiffness and natural frequency are discussed under variation of the span lengths ratio, Irvine parameter, and insulator string length. Moreover, the modal shape function corresponding natural frequency is derived, and the contribution of localization mode is studied. The results show that the contribution is either sensitive to or independent of transmission line parameters in certain parameter ranges. Finally, generalizing the work of two-span, the dynamic stiffness of arbitrary span number is obtained.
Year
DOI
Venue
2022
10.1109/ACCESS.2022.3180731
IEEE ACCESS
Keywords
DocType
Volume
Power cables, Insulators, Conductors, Resonant frequency, Vibrations, Poles and towers, Aerodynamics, Equivalent stiffness, series of spans, mode, natural frequency, ABAQUS
Journal
10
ISSN
Citations 
PageRank 
2169-3536
0
0.34
References 
Authors
0
7
Name
Order
Citations
PageRank
Lv Zhongbin100.34
Bo Zhang2419.80
Liu Xiaohui300.34
Tao Yaguang400.34
Liang Haobo500.34
Qing Li6267.63
Yan Bo700.34