Static and dynamic fault tree analysis with application to hybrid vehicle systems and supply chains

Xue, Lei

doi:10.31274/etd-180810-4973

Cited by 3 publications

(1 citation statement)

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“…From the viewpoint of modeling system or component failure, DFTs can be implemented by introducing dynamic gates into conventional fault trees to consider the redundancy, failure complexes, and recovery times of the systems [3]. Examples of application to a system using these dynamic gates have also been presented in previous studies [3,4].…”

Section: Introductionmentioning

confidence: 99%

Application of Dynamic Fault Tree Analysis to Prioritize Electric Power Systems in Nuclear Power Plants

Baek

Heo

2021

Energies

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Because the scope of risk assessments at nuclear power plants (NPPs) is being extended both spatially and temporally, conventional, or static fault trees might not be able to express failure mechanisms, or they could be unnecessarily conservative in their expression. Therefore, realistic assessment techniques are needed to adequately capture accident scenarios. In multi-unit probabilistic safety assessment (PSA), fault trees naturally become more complex as the number of units increases. In particular, when considering a shared facility between units of the electric power system (EPS), static fault trees (SFTs) that prioritize a specific unit are limited in implementing interactions between units. However, dynamic fault trees (DFTs) can be available without this limitation by using dynamic gates. Therefore, this study implements SFTs and DFTs for an EPS of two virtual NPPs and compares their results. In addition, to demonstrate the dynamic characteristics of the shared facilities, a station blackout (SBO), which causes the power system to lose its function, is assumed—especially with an inter-unit shared facility, AAC DG (Alternate AC Diesel Generator). To properly model the dynamic characteristics of the shared EPS in DFTs, a modified dynamic gate and algorithm are introduced, and a Monte Carlo simulation is adopted to quantify the DFT models. Through the analysis of the DFT, it is possible to confirm the actual connection priority of AAC DG according to the situation of units in a site. In addition, it is confirmed that some conservative results presented by the SFT can be evaluated from a more realistic perspective by reflecting this.

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Section: Introductionmentioning

confidence: 99%

Application of Dynamic Fault Tree Analysis to Prioritize Electric Power Systems in Nuclear Power Plants

Baek

Heo

2021

Energies

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A logical-probabilistic model for analysing the reliability of wind – diesel generator autonomous hybrid power system

Vasileva

2022

2022 14th Electrical Engineering Faculty Conference (BulEF)

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Investigating a Technological System Through FTA Analysis

Vasileva

2023

2023 15th Electrical Engineering Faculty Conference (BulEF)

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Static and dynamic fault tree analysis with application to hybrid vehicle systems and supply chains

Abstract: I would like to dedicate this thesis to my parents without whose support I would not have been abale to complete this work. I would also like to thank my friends for their loving guidence during the writing of this work. iii

Cited by 3 publications

References 71 publications

Application of Dynamic Fault Tree Analysis to Prioritize Electric Power Systems in Nuclear Power Plants

Application of Dynamic Fault Tree Analysis to Prioritize Electric Power Systems in Nuclear Power Plants

A logical-probabilistic model for analysing the reliability of wind – diesel generator autonomous hybrid power system

Investigating a Technological System Through FTA Analysis

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