ABSTRACT
Reliability analysis and resilience assessment of engineering systems, such as substations, can help evaluate the ability of a system to resist and recover from natural disasters like earthquakes. A newly developed system analysis method, i.e., the state tree method that provides a fundamental system model for both reliability analysis and resilience assessment of complex systems, was introduced in this study. To demonstrate the procedures and effectiveness of the proposed method, a quantitative framework followed with a case study on a substation system was introduced. The seismic reliability of the substation at different functionality levels was computed based on reasonably summarized fragility parameters of major electrical equipment. Key components of the analyzed systems are identified considering their effects on the system fragility with sensitive analysis. The seismic resilience of the substation was quantified in terms of recovery curves and indices. The effects of different recovery strategies on the resilience of the substation were discussed.
