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http://dx.doi.org/10.5000/EESK.2006.10.5.107

Modal Identification and Seismic Performance Evaluation of 154kV Transformer Porcelain Bushing by Vibration Test  

Joe, Yang-Hee (인천대학교 토목환경시스템공학과)
Cho, Sung-Gook (인천대학교 공학기술연구소)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.10, no.5, 2006 , pp. 107-115 More about this Journal
Abstract
The power supply system is one of the most important infrafacilities which should maintain their inherent function during and after earthquakes. This study was performed to analyze dynamic characteristics and seismic performance of Korean typical 154kV transformer porcelain bushing. For the purpose of this study, actual 154kV porcelain bushings were selected and tested on the shaking table. The vibration tests consist of modal identification tests, seismic performance tests, and fragility tests. The sine sweep waves, artificial earthquake waves, and continuous resonant sine waves were used as shaking table motions. This paper describes the test specimens, shaking facilities, and test methods. Natural frequencies and damping ratios of the bushing have been evaluated from the experimental data. The failure mode and the performance level of the Korean transformer bushing have been first identified in this study.
Keywords
power supply system; transformer bushing; dynamic property; seismic performance; vibration test; modal identification; vibration frequency; damping ratio; failure mode;
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