Citation

Srivastava D, Chandra D. Int. J. Appl. Eng. Res. 2016; 11(10): 6972-6982.

Copyright

(Copyright © 2016, Research India Publications)

DOI

unavailable

PMID

unavailable

Abstract

Conductor galloping is the high-amplitude, low-frequency oscillation of overhead power lines owing to wind. Galloping can cause various kinds of structural and electrical losses for overhead transmission lines. It can also lead to sparking that results in fires. This conductor motion is of large amplitude (approximately>10 m) and low frequency (approximately 0. 1-3 Hz). The movement of the wires mostly occurs in the vertical plane, although rotational and horizontal movements are also possible. In this paper we propose to find an effective mathematical design standard for describing the galloping mechanism in transmission cable.

This study compares existing design standard and continuum cable standard for transmission lines.

To find a mathematical standard of the galloping mechanism, and it is required to compare the existing mathematical standards on the conductor galloping. In this paper, using the Hamilton principle the continuum cable standard for transmission lines was proposed. Discrete standards of one degree of freedom, two degree of freedom, and three degree of freedom were obtained from the Garlekin function. And the standards were compared with different influence factors by analyzing the galloping vertical amplitude. The influence factors were wind velocity, flow density, damping ratio, span length, and initial tension. The three-degree of freedom design standard is more accurate than the other two standards for galloping characteristics calculation.

The variation of the galloping amplitude relative to the influence factors was also obtained using finite element method (FEM). This analysis isvery useful for galloping analysis and anti-galloping design.

Language: en