Abstract
Caused by strong winds or nonuniform icing, conductor galloping is one of the major hazards that should be monitored in a timely fashion. In this paper, we proposed a new full-scale reconstruction method for transmission line curves based on the attitude sensors that uses only the tangential information and arc-length constraint. Meanwhile, a comparatively low-complexity algorithm is presented: (1) quaternion rotation to generate the tangent vectors; (2) a modified B-spline global interpolation to evaluate the curvature information; and (3) a linear mapping method to correct reconstruction curves. Moreover, sensors placement method is put forward according to the galloping features. Finally, both simulation and experimental results demonstrate that the proposed method can accurately reconstruct the galloping curves in a relatively short time, which fulfills the requirement of the real-time galloping monitoring system.
Highlights
The overhead transmission line is the primary approach for long-distance electrical energy transmission, which is always challenged by the harsh environmental conditions
We proposed a new full-scale reconstruction method for transmission line curves based on the attitude sensors that uses only the tangential information and arc-length constraint
Sensors placement method is put forward according to the galloping features. Both simulation and experimental results demonstrate that the proposed method can accurately reconstruct the galloping curves in a relatively short time, which fulfills the requirement of the real-time galloping monitoring system
Summary
The overhead transmission line is the primary approach for long-distance electrical energy transmission, which is always challenged by the harsh environmental conditions. Full-scale test transmission lines [1, 3] and wind tunnels [16] have been established to test the galloping behavior and antigalloping techniques, but some limitations remain Such studies have been performed in both theory and practice, there is no universal theory to explain the galloping mechanism. We aim to reconstruct the galloping curves via tangential information with a length constraint using few attitude sensors, which do not need to know the spatial position of the conductor obtained using DGPS technology. The author in [25] proposed a spatial interpolation with a Pythagorean-hodograph, which has better reconstruction performance than does the natural cubic spline method This method requires extensive iterative computations, which is not suitable for a real-time galloping monitoring system. To the best of our knowledge, that this paper is the first study to attempt to examine the full reconstruction of galloping curves from a set of tangential information with the arc-length constraints
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