98 research outputs found
An Integrated Approach for Failure Mitigation & Localization in Power Systems
The transmission grid is often comprised of several control areas that are
connected by multiple tie lines in a mesh structure for reliability. It is also
well-known that line failures can propagate non-locally and redundancy can
exacerbate cascading. In this paper, we propose an integrated approach to grid
reliability that (i) judiciously switches off a small number of tie lines so
that the control areas are connected in a tree structure; and (ii) leverages a
unified frequency control paradigm to provide congestion management in real
time. Even though the proposed topology reduces redundancy, the integration of
tree structure at regional level and real-time congestion management can
provide stronger guarantees on failure localization and mitigation. We
illustrate our approach on the IEEE 39-bus network and evaluate its performance
on the IEEE 118-bus, 179-bus, 200-bus and 240-bus networks with various network
congestion conditions. Simulations show that, compared with the traditional
approach, our approach not only prevents load shedding in more failure
scenarios, but also incurs smaller amounts of load loss in scenarios where load
shedding is inevitable. Moreover, generators under our approach adjust their
operations more actively and efficiently in a local manner.Comment: Accepted to the 21st Power Systems Computation Conference (PSCC 2020
How Committed Individuals Shape Social Dynamics: A Survey on Coordination Games and Social Dilemma Games
Committed individuals, who features steadfast dedication to advocating strong
beliefs, values, and preferences, have garnered much attention across
statistical physics, social science, and computer science. This survey delves
into the profound impact of committed individuals on social dynamics that
emerge from coordination games and social dilemma games. Through separate
examinations of their influence on coordination, including social conventions
and color coordination games, and social dilemma games, including one-shot
settings, repeated settings, and vaccination games, this survey reveals the
significant role committed individuals play in shaping social dynamics. Their
contributions range from accelerating or overturning social conventions to
addressing cooperation dilemmas and expediting solutions for color coordination
and vaccination issues. Furthermore, the survey outlines three promising
directions for future research: conducting human behavior experiments for
empirical validation, leveraging advanced large language models as proxies for
committed individuals in complex scenarios, and addressing potential negative
impacts of committed individuals
An integrated approach for failure mitigation & localization in power systems
The transmission grid is often comprised of several control areas that are connected by multiple tie lines in a mesh structure for reliability. It is also well-known that line failures can propagate non-locally and redundancy can exacerbate cascading. In this paper, we propose an integrated approach to grid reliability that (i) judiciously switches off a small number of tie lines so that the control areas are connected in a tree structure; and (ii) leverages a unified frequency control paradigm to provide congestion management in real time. Even though the proposed topology reduces redundancy, the integration of tree structure at regional level and real-time congestion management can provide stronger guarantees on failure localization and mitigation. We illustrate our approach on the IEEE 39-bus network and evaluate its performance on the IEEE 118-bus, 179-bus, 200-bus and 240-bus networks with various network congestion conditions. Simulations show that, compared with the traditional approach, our approach not only prevents load shedding in more failure scenarios, but also incurs smaller amounts of load loss in scenarios where load shedding is inevitable. Moreover, generators under our approach adjust their operations more actively and efficiently in a local manner
An integrated approach for failure mitigation & localization in power systems
The transmission grid is often comprised of several control areas that are connected by multiple tie lines in a mesh structure for reliability. It is also well-known that line failures can propagate non-locally and redundancy can exacerbate cascading. In this paper, we propose an integrated approach to grid reliability that (i) judiciously switches off a small number of tie lines so that the control areas are connected in a tree structure; and (ii) leverages a unified frequency control paradigm to provide congestion management in real time. Even though the proposed topology reduces redundancy, the integration of tree structure at regional level and real-time congestion management can provide stronger guarantees on failure localization and mitigation. We illustrate our approach on the IEEE 39-bus network and evaluate its performance on the IEEE 118-bus, 179-bus, 200-bus and 240-bus networks with various network congestion conditions. Simulations show that, compared with the traditional approach, our approach not only prevents load shedding in more failure scenarios, but also incurs smaller amounts of load loss in scenarios where load shedding is inevitable. Moreover, generators under our approach adjust their operations more actively and efficiently in a local manner
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