Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Cascading Failures"”.
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Analysis of cascading failures in power networks
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Stochastic Dynamics of Cascading Failures in Electric-Cyber Infrastructures
… suggest that they are yet vulnerable to large failures. A small set of initial disturbances in power grids in conjunction with lack of effective, corrective actions in a timely manner can trigger a sequence of dependent component failures, called cascading failures. The main thrust of this …
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Cascading Failures and Contingency Analysis for Smart Grid Security
… thesis is to facilitate the understanding of cascading failure and blackouts triggered by multi-component attacks, and to support the decision making in the protection of a reliable and secure smart grid. In this work, a new definition of load is proposed by taking power flow into …
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Containing Cascading Failures in Networks: Applications to Epidemics and Cybersecurity
Many real word networks exhibit cascading phenomena, e.g., disease outbreaks in social contact networks, malware propagation in computer networks, failures in cyber-physical systems such as power grids. As they grow in size and complexity, their security becomes increasingly important. In this …
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Influence Graphs for Modeling of Cascading Failures in Electric Distribution Networks
… The occurrence of these odd events may lead to cascading failures, which are prominent contributors to blackouts.</p> <p>This paper focuses on the development of a cascade model in a distribution network using Newton-Raphson’s power flow method to study the impact of random line failures on …
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Modeling and mitigating cascading failures in interdependent power grids and communication networks
… network infrastructures, a cascade of failures may occur where power failures can lead to communication failures, which, in turn, lead to cascading power failures. Therefore, it is necessary to develop proper models and analytical tools to asses the robustness of interdependent networks …
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Logic-Targeted Data Poisoning and Cascading Failures in AI-Driven Distributed Traffic Control Systems
MARL (multi-agent reinforcement learning) is increasingly used to create intelligent traffc signal control systems for city-wide traffc management. This improves the movement of people and vehicles, but it also introduces new physical-layer safety risks at the sensor level that have not been …
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Network Modeling Stochastic and Deterministic Approaches
… of the vulnerability towards the propagation of cascading failures. The goal is to understand the mutual interplay between the structure of the network connections and the propagation of cascading failures. Two fundamental issues related to the optimal design and operation of complex networks are …
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On control and optimization of cascading phenomena in a class of dynamic networks
… evolution of network topology over the course of cascading failures. Next, we propose a min-max setup for studying the impact of post-disturbance reactance tweaking on the resilience of the system to a worst-case N-k disturbance and devise a MILP reformulation scheme for the underlying bilevel …
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Resilient operations of smart electricity networks under security and reliability failures
Blackouts (or cascading failures) in Electricity Networks (ENs) can result in severe consequences for economic activity, human safety and national security. Recent incidents suggest that risk of blackouts due to cyber-security attacks and extreme weather events is steadily increasing in many …
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From Contagion to Stability: Insights into Network Dynamics, Resilience and Stability
… disruptions can propagate and cause widespread failures. This thesis addresses this fundamental challenge by examining how to reason about and reinforce the resilience of complex networks through theoretical and applied tools, including probability, statistics, algorithms, and network science, …
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Provably reliable machine learning systems
… and semantic specifications, leading to cascading failures in automated workflows. Thus, developing reliability techniques for machine learning systems that are simultaneously general, precise, and scalable remains a challenging task. To address these challenges, this dissertation …
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Analysis and operations in complex networked systems: From urban infrastructure to epidemics
… with two main focuses: i) infrastructure cascading failures in urban interdependent infrastructure networks, and ii) infectious disease propagation dynamics and control in population contact networks. Under each topic, one or several studies are performed with different focuses to reveal …
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A New Special Protection Scheme for Power System Controlled Separation
… scheme is proposed to prevent the propagation of cascading failures across a transmission network should it undergoes a major disturbance, thereby reducing the possibility of a large-scale blackout. This scheme is developed based on a set of conjectures, which state the following: (i) the …
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A methodology for the identification of critical locations in infrastructures
… are sensitive to disruptions that can lead to cascading failures with serious consequences. Protecting the critical infrastructures from terrorism, human generated malevolent attack directed toward maximum social disruption, presents an enormous challenge. Recognizing that society cannot afford …
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Integrated System Model Reliability Evaluation and Prediction for Electrical Power Systems: Graph Trace Analysis Based Solutions
… computationally handling dependent outages and cascading failures. The effects of adverse weather, time-varying loads, equipment age, installation environment, operation conditions are considered. Sequential Monte Carlo simulation is used to evaluate the reliability changes for different system …
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A Comprehensive Method For Coordinating Distributed Energy Resources In A Power Distribution System
… such as loss reduction, resilience against cascading failures and access to more diversified resources. However, serious challenges and risks must be addressed to ensure continuity and reliability of service. By integrating necessary communication and control infrastructure into the …
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Power Grid Partitioning and Monitoring Methods for Improving Resilience
… islands in order to arrest the propagation of cascading failures after an event. Heuristic methods are proposed to determine in what sequence should the island boundary lines be disconnected such that there are no operation constraint violations. The idea of optimal partitioning is further …
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Application of nearly linear solvers to electric power system computation
… situational awareness to implement and avoid cascading failures, significantly improving power system reliability. Several power system applications rely on the solution of a very large linear system. As the demands on power systems continue to grow, there is a greater computational complexity …
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Resilience Engineering via Bifurcation and Ecological Network Analysis: Demonstrated in an Electric Power Case Study
… to unexpected and varied disruptions and cascading failures, making resilience a critical concern. Traditional risk management and resilience assessment methods often struggle with the nonlinearity and dynamic behavior of these systems. This dissertation proposes a novel approach combining …
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