Seismic Interaction between Flexible Conductors and Electrical Substation Equipment
Publication: Journal of Structural Engineering
Volume 131, Issue 2
Abstract
High-voltage flexible conductors are employed to interconnect equipment items in electrical substations located on seismically active regions to carry the electricity from one equipment item to another. They have sufficient slack to allow the conductor to accommodate the relative displacements of the adjacent interconnected equipment under seismic loading. However, additional forces due to the dynamic response of the conductor during severe shaking, and its interaction with the interconnected equipment, could cause additional unpredicted forces resulting in damage or failure of the equipment. This paper presents the results of a project to investigate the dynamic behavior of these conductors and their interaction with the interconnect equipment. The project included performing quasi-static and dynamic tests on one of the most commonly used configurations of these conductors in substations throughout the province of British Columbia in Canada. The results of this investigation demonstrated that there can be significant dynamic force amplification due to dynamic interaction of the flexible conductors with the equipment, and showed that the dynamic effect of these conductors must be considered when evaluating the seismic demand of interconnected equipment.
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Acknowledgments
Funding for this study was provided by Powertech Labs Inc. The writers would like to gratefully acknowledge Dr. Hans Rainer for contributing to this study and coordinating the project between UBC and Powertech Labs. The contribution of Dr. Endi Zhai in the first stages of the project, the support of Jean-Bernard Dastous of Hydro Quebec in providing the load cells, and the assistance of the technical staff of EERF are also acknowledged. The writers would also like to acknowledge the comments and suggestions of the anonymous reviewers of the original manuscript of this paper.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 2 • February 2005
Pages: 231 - 239
Copyright
© 2005 ASCE.
History
Received: Dec 27, 2002
Accepted: May 21, 2004
Published online: Feb 1, 2005
Published in print: Feb 2005
Notes
Note. Associate Editor: Michael D. Symans
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