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Seismic fragilities of high-voltage substation disconnect switches

Bai Wen, Mohamed A. Moustafa and Dai Junwu
Seismic fragilities of high-voltage substation disconnect switches
Earthquake Spectra (November 2019) 35 (4): 1559-1582


Electrical substations and vital components, e.g., disconnect switches, experienced severe damage that caused blackouts during past earthquakes. To improve the seismic resiliency of power grids and use probabilistic decision-making frameworks, comprehensive fragility data for the different substation equipment are needed. The objective of this study is to investigate the seismic performance of and develop component and system fragility curves for a critical substation component: disconnect switches. The seismic vulnerability of two common switch types was evaluated and two operational configurations were considered. Detailed nonlinear finite element models for the full switches were calibrated using previous experimental data and used to conduct incremental dynamic analysis and carry out the fragility assessment. A total of 160 triaxial ground motions representing four sets of different ground motion characteristics were used. The switches' fragility curves were developed and presented to be readily used for new substation design, prioritizing retrofit/maintenance activities and reliability assessment of power grids.

ISSN: 8755-2930
EISSN: 1944-8201
Serial Title: Earthquake Spectra
Serial Volume: 35
Serial Issue: 4
Title: Seismic fragilities of high-voltage substation disconnect switches
Affiliation: China Earthquake Administration, Key Laboratory of Earthquake Engineering and Engineering Vibration, Harbin, China
Pages: 1559-1582
Published: 201911
Text Language: English
Publisher: Earthquake Engineering Research Institute, Berkeley, CA, United States
References: 36
Accession Number: 2021-006709
Categories: SeismologyEngineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables, 1 plate
Secondary Affiliation: University of Nevada at Reno, Department of Civil and Environmental Engineering, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202105
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