Portland State University. Department of Civil and Environmental Engineering
Date of Award
Master of Science (M.S.) in Civil & Environmental Engineering
Civil and Environmental Engineering
Electric substations, Earthquake hazard analysis, Electric power systems -- Earthquake effects
The performance of high voltage electrical substations during an earthquake significantly contributes to regional resilience by providing electrical power to public entities, businesses and homes following an earthquake. Utilities try to minimize the seismic impact by qualifying individual equipment, but rarely evaluate the interconnected substation bay as a whole. In this study, three detailed numerical models were developed using the seismic qualification reports of individual electrical equipment as basis for the components within 115kV, 230kV, and 500 kV substation bay systems. The substation bays were evaluated without interconnectivity of the components and with rigid bus connectivity between components. The models were subjected to modal and modal time history analyses. Displacement demands, forces at electrical equipment terminal pads, and forces at the base of insulators were compared to one another, as well as to equipment failure criteria provided by the utility. The changes and variability of the results shows that evaluation of the interconnected system is important in understanding the overall seismic performance of a substation.
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London, Robert C.H., "Substation Bay Modeling and Seismic Sensitivity Study" (2014). Civil and Environmental Engineering Master's Project Reports. 10.