Browsing by Author "Mancarella, Pierluigi"

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    Identifying Optimal Portfolios of Resilient Network Investments Against Natural Hazards, With Applications to Earthquakes
    (IEEE, 2020) Lagos, Tomás; Moreno, Rodrigo; Navarro Espinosa, Alejandro Andrés; Panteli, Mathaios; Sacaan, Rafael; Ordonez, Fernando; Rudnick van de Wyngard, Hugh; Mancarella, Pierluigi
    Although extreme natural disasters have occurred all over the world throughout history, power systems planners do not usually recognize them within network investment methodologies. Moreover, planners had historically focused on reliability approaches based on average (rather than risk) performance indicators, undermining the effects of high impact and low probability events on investment decisions. To move towards a resilience centred approach, we propose a practical framework that can be used to identify network investments that offer the highest level of hedge against risks caused by natural hazards. In a first level, our framework proposes network enhancements and, in a second level, uses a simulation to evaluate the resilience level improvements associated with the network investment propositions. The simulator includes 4 phases: threat characterization, vulnerability of systems components, system response, and system restoration, which are simulated in a sequential Monte Carlo fashion. We use this modeling framework to find optimal portfolio solutions for resilient network enhancements. Through several case studies with applications to earthquakes, we distinguish the fundamental differences between reliability- and resilience-driven enhancements, and demonstrate the advantages of combining transmission investments with installation of backup distributed generation.
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    Seismic resilience assessment and adaptation of the Northern Chilean power system
    (IEEE, 2017) Espinoza Lara, Sebastián Andres; Poulos Campbell, Alan John; Rudnick Van de Wyngard, Hugh; Llera Martin, Juan Carlos de la; Panteli, Mathaios; Mancarella, Pierluigi; Sacaan, Rafael; Navarro, Alejandro; Moreno, Rodrigo
    Even though the concept of resilience is becoming widely used in electric power systems, there is no consensus on how to systematically model or quantify it. This article begins by proposing a classification for different types of system risk analyses, associating them to the concept of power systems resilience. Thereafter, it describes and applies a resilience assessment and adaptation framework to the Northern Chilean electric power system in the context of its exposure to seismic events. This time-dependent analysis is evaluated throughout the disaster's impact and the network's operation and restoration timeframes with two indices: Energy not Supplied and Energy Index of Unreliability. Finally, the article compares a base case with three resilience adaptation strategies, namely, robust, redundant and responsive cases, in terms of their expected energy annual loss and the return period of different levels of network performance.