Svetlana Poroseva - Academia.edu (original) (raw)
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Papers by Svetlana Poroseva
22nd AIAA Computational Fluid Dynamics Conference, 2015
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Spectral matrix methods are widely used for intelligent intentional islanding of power grids, the... more Spectral matrix methods are widely used for intelligent intentional islanding of power grids, the purposeful partitioning of a utility system to limit cascading disturbances. However, these methods may produce unbalanced islands of generators and loads when applied recursively. While some of the resulting islands have surplus generating capacity, others are deficient. We here implement a Monte Carlo simulated-annealing optimization procedure
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Modern societies depend critically on their electrical power grids. It is, therefore, essential t... more Modern societies depend critically on their electrical power grids. It is, therefore, essential to understand the grid's large-scale behavior in order to improve its resilience against catastrophic damage. A key factor determining the grid's large-scale behavior is its topology. In particular, an important question is whether a grid topology can be efficiently partitioned into independent communities (``islands'') of densely connected
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The purposeful partitioning of a utility system to limit the cascading disturbances is called int... more The purposeful partitioning of a utility system to limit the cascading disturbances is called intelligent intentional islanding. Spectral matrix methods for intelligent intentional islanding of power grids may produce unbalanced clusters of generators and loads when applied recursively. While some of the resulting clusters have surplus generating capacity, others are deficient. To limit cascading power failures by isolating highly connected
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2008 IEEE/PES Transmission and Distribution Conference and Exposition, 2008
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IEEE Electric Ship Technologies Symposium, 2005., 2005
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52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2011
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2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008
Abstract Any power system, either an integrated power system in an all-electric ship or a utility... more Abstract Any power system, either an integrated power system in an all-electric ship or a utility power system, needs to be highly reliable. Reliability of a complex system strongly depends on the possibility of detecting faults and isolating them from each other, ie, on the monitoring potential of the system. The area of power system engineering that is concerned with the fault detection and isolation is called protection. As power systems becoming more and more complex, current standards for their protection should be adjusted accordingly ...
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ABSTRACT
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Rapid distortion calculations of initially anisotropic turbulence are performed to better underst... more Rapid distortion calculations of initially anisotropic turbulence are performed to better understand the physics of pressure-strain correlation. In the talk several interesting aspects of the correlation behavior inferred from the simulations will be presented. Although these features of the correlation appear self-evident, most of the current models violate them. The violations are significant as they appear to directly lead to unrealizable and inconsistent model behavior.
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Bookmarks Related papers MentionsView impact
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ABSTRACT
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ABSTRACT
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The Dempster-Shafer theory of evidence provides two basic tools -- i) belief functions that repre... more The Dempster-Shafer theory of evidence provides two basic tools -- i) belief functions that represent the degree of belief (confidence) in a given proposition on the basis of given evidence, and ii) Dempster's rule for combining the belief functions generated by different sources in relation to the same proposition. Previously, we have shown that these tools can be used effectively in application to various CFD problems (subsonic flow around the RAE 2822 airfoil and hurricane/typhoon track forecasts). The current study focuses on further enhancement of the predictive algorithms employing Dempster's rule. Specifically, we analyze one of the requirements of Dempster's rule that belief functions corresponding to different sources should be constructed using independent evidence. In CFD problems, evidence is experimental/observational data, which can be quite limited in number and barely sufficient to construct a single belief function. Application of Dempster's rule requires a minimum of two belief functions. We examine the origin of the requirement that independent data be used to construct belief functions and consider a strategy to overcome this constraint and its implications.
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ABSTRACT
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22nd AIAA Computational Fluid Dynamics Conference, 2015
Bookmarks Related papers MentionsView impact
Spectral matrix methods are widely used for intelligent intentional islanding of power grids, the... more Spectral matrix methods are widely used for intelligent intentional islanding of power grids, the purposeful partitioning of a utility system to limit cascading disturbances. However, these methods may produce unbalanced islands of generators and loads when applied recursively. While some of the resulting islands have surplus generating capacity, others are deficient. We here implement a Monte Carlo simulated-annealing optimization procedure
Bookmarks Related papers MentionsView impact
Modern societies depend critically on their electrical power grids. It is, therefore, essential t... more Modern societies depend critically on their electrical power grids. It is, therefore, essential to understand the grid's large-scale behavior in order to improve its resilience against catastrophic damage. A key factor determining the grid's large-scale behavior is its topology. In particular, an important question is whether a grid topology can be efficiently partitioned into independent communities (``islands'') of densely connected
Bookmarks Related papers MentionsView impact
The purposeful partitioning of a utility system to limit the cascading disturbances is called int... more The purposeful partitioning of a utility system to limit the cascading disturbances is called intelligent intentional islanding. Spectral matrix methods for intelligent intentional islanding of power grids may produce unbalanced clusters of generators and loads when applied recursively. While some of the resulting clusters have surplus generating capacity, others are deficient. To limit cascading power failures by isolating highly connected
Bookmarks Related papers MentionsView impact
2008 IEEE/PES Transmission and Distribution Conference and Exposition, 2008
Bookmarks Related papers MentionsView impact
IEEE Electric Ship Technologies Symposium, 2005., 2005
Bookmarks Related papers MentionsView impact
52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2011
Bookmarks Related papers MentionsView impact
2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008
Abstract Any power system, either an integrated power system in an all-electric ship or a utility... more Abstract Any power system, either an integrated power system in an all-electric ship or a utility power system, needs to be highly reliable. Reliability of a complex system strongly depends on the possibility of detecting faults and isolating them from each other, ie, on the monitoring potential of the system. The area of power system engineering that is concerned with the fault detection and isolation is called protection. As power systems becoming more and more complex, current standards for their protection should be adjusted accordingly ...
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Rapid distortion calculations of initially anisotropic turbulence are performed to better underst... more Rapid distortion calculations of initially anisotropic turbulence are performed to better understand the physics of pressure-strain correlation. In the talk several interesting aspects of the correlation behavior inferred from the simulations will be presented. Although these features of the correlation appear self-evident, most of the current models violate them. The violations are significant as they appear to directly lead to unrealizable and inconsistent model behavior.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
The Dempster-Shafer theory of evidence provides two basic tools -- i) belief functions that repre... more The Dempster-Shafer theory of evidence provides two basic tools -- i) belief functions that represent the degree of belief (confidence) in a given proposition on the basis of given evidence, and ii) Dempster's rule for combining the belief functions generated by different sources in relation to the same proposition. Previously, we have shown that these tools can be used effectively in application to various CFD problems (subsonic flow around the RAE 2822 airfoil and hurricane/typhoon track forecasts). The current study focuses on further enhancement of the predictive algorithms employing Dempster's rule. Specifically, we analyze one of the requirements of Dempster's rule that belief functions corresponding to different sources should be constructed using independent evidence. In CFD problems, evidence is experimental/observational data, which can be quite limited in number and barely sufficient to construct a single belief function. Application of Dempster's rule requires a minimum of two belief functions. We examine the origin of the requirement that independent data be used to construct belief functions and consider a strategy to overcome this constraint and its implications.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact