Resilience Assessment and Importance Measure for Interdependent Critical Infrastructures

Abstract

Based upon a novel control-based dynamic modelling framework, this paper proposes two new indicators, i.e., resilience by mitigation and resilience by recovery, for the resilience analysis of interdependent critical infrastructures (ICIs) under disruptions. The former is built from the protection activities before and during the mitigation phase of a disruptive event, and the latter is the result of the restoration efforts which take place at the recovery phase. The total resilience of ICIs combines both of these two aspects by taking into account the preferences of the decision-makers. We demonstrate the applicability of the proposed modelling framework and metrics in a case study involving ICIs made of a power grid and a gas distribution system. Owing to the new resilience indicators, the priorities of subsystems and links within ICIs at different phases can be ranked, therefore different resilience strategies at different phases of disruptive events are compared. The results show that proposed metrics can be used by stakeholders of ICIs on improving the effectiveness of system protection measurements.

A multi‐perspective framework for seismic retrofit optimization of urban infrastructure systems

“…Similar component retrofit studies were conducted by Kim et al 44 . to upgrade interdependent power and water networks in Memphis against seismic hazards; by Zou and Chen 45 to enhance the resilience of an interdependent traffic‐electric power system in Galveston, Texas under disruptions; and by Liu et al 46 . to decide the component retrofit priority for interconnected power and gas systems.…”

“…Dueñas-Osorio et al 42 proposed a simplified method to identify critical components for retrofitting interdependent power and water networks located in an earthquake-prone region; Kong et al 43 proposed a model to search the best component hardening strategy through maximizing the resilience of interdependent electric, gas, and oil transmission networks against regional natural hazards. Similar component retrofit studies were conducted by Kim et al 44 to upgrade interdependent power and water networks in Memphis against seismic hazards; by Zou and Chen 45 to enhance the resilience of an interdependent trafficelectric power system in Galveston, Texas under disruptions; and by Liu et al 46 to decide the component retrofit priority for interconnected power and gas systems.…”

Defining a new index to compare the resilience of different structures of an electrical energy network

“…To compare different methods and strategies, a resilience evaluation index needs to be able to examine both categories simultaneously. So far, no standard index has been presented to assess the resilience of an electrical network and compare the efficiency of resilience improvement methods proposed in various studies since a standard definition has not yet been adopted and presented by the international community for measuring and assessing the resilience of an electrical network [11,[26][27][28][29][30] and each of the studies which presented the solution and ideas in this regard has defined and used a new index to evaluate its proposed solution depending on what part of the resilience parameter is improved by the proposed solution. The following are some examples of recent research introducing and using different indices to evaluate the resilience parameter in an electrical network.…”

“…The supplied critical loads [13,14,18,22,25,32] 3 Resilience assessment with curve analysis [20,29,33,[43][44][45][46][47][48][49][50][51][52][53][54] 4…”

An overview of the assessment metrics of the concept of resilience in electrical grids

“…In a number of studies, such as, 10,29,[32][33][34][35]60 the resilience assessment of a grid has been performed in more details using the resilience curve in which according to Figure 2, it has been tried to resolve the problems attributed to the initial curve by dividing the system performance curve into five parts including "endurance period before system performance reduction," "system performance reduction period," "system longevity interval in decline status," "recovery period," and "post-recovery system status. "…”