Results 271 to 280 of about 33,116 (291)

Voltage instability/collapse - an overview

IEE Colloquium on Voltage Collapse, 1997
Voltage instability and voltage collapse are a frequent concern on heavily stressed power systems. This paper contains an overview of what, in the author's view, are the main aspects to be considered when addressing such problems. Also included in the paper is a review of some of the analytical tools that are available for voltage stability analysis ...
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Dynamic simulation of voltage collapses

IEEE Transactions on Power Systems, 1993
The authors show some examples of dynamic simulations of voltage phenomena using a new general purpose stability program (EUROSTAG) covering in a continuous way the classical fields of transient, mid-term and long-term stability, and also the quasi steady state conditions of a power system.
J. Deuse, M. Stubbe
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Detection of dynamic voltage collapse

IEEE Power Engineering Society Summer Meeting,, 2003
This paper investigates how to detect a dynamic voltage collapse situation. The generator and governor dynamics are considered in the simulation process. An index proposed earlier has been investigated for its applicability to indicate the collapse situation.
G.M. Huang, N.-K.C. Nair
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Analysis of voltage collapse by simulation

IEEE International Symposium on Circuits and Systems, 2003
Voltage collapse was investigated by simulations on a midsize power system with 39 buses and 10 generators. System loads were modeled as constant complex power corrupted with Gaussian noise of a small magnitude. The initial conditions for simulation were determined by singular-value decomposition of the load-flow Jacobian.
M.M. Begovic, A.G. Phadke
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On the evaluation of voltage collapse criteria

IEEE Transactions on Power Systems, 1990
The authors provide an approach that enables a power system operator or planner to evaluate his or her alternatives in selecting a certain voltage collapse criterion. Specifically, the selection of a criterion must guarantee that the risk of making a wrong decision is minimal for any operating point and disturbance.
J.-C. Chow, R. Fischl, H. Yan
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Dynamic Analysis of Voltage Collapse in Power Systems

[1992] Proceedings of the 31st IEEE Conference on Decision and Control, 1995
An analytical framework is presented for the analysis of voltage collapse as a dynamic phenomenon. The approach depends on linking static and dynamic aspects within differential-algebraic models which preserve network structure and facilitate the use of a novel approach to modeling aggregate (dynamic) load. Directions for stability/bifurcation analysis
D.J. Hill, I.A. Hiskens
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Voltage collapse and its avoidance

IEE Colloquium on Voltage Collapse, 1997
This paper discusses the phenomenon which leads to voltage collapse. It describes how automatic control equipment may exacerbate the decay of system voltage levels, with specific reference to the automatic tap changing of supply transformers. It addresses the factors which affect the onset of such behaviour, and operational requirements for the ...
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Online fuzzy voltage collapse risk quantification

Electric Power Systems Research, 2009
Abstract Many voltage stability indicators have been proposed in the past for the voltage collapse assessment. Almost all of them are determined through quite complex analytical tools; therefore, it is difficult for system operators to give them a physical meaning.
BERIZZI, ALBERTO, BOVO, CRISTIAN, DELFANTI, MAURIZIO, D. Cirio, MERLO, MARCO, M. Pozzi   +5 more
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Prediction of voltage collapse through voltage collapse proximity index and inherent structural characteristics of power system

2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2015
The frequent incident of voltage collapse in the modern power system due to incessant increase in load demand has posed a great challenge to power system utilities. This paper demonstrates the concept of inherent structural characteristics and the traditional approach of voltage collapse proximity index (VCPI) in predicting the collapse point in the ...
Isaiah G. Adebayo, Adisa A. Jimoh, Adedayo A. Yusuff   +2 more
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A comparison of voltage collapse proximity indicators

2010 Conference Proceedings IPEC, 2010
This paper reviews some important voltage stability indices and presents a new classification of them. These indices can be divided into two categories. The one which is based on the load flow Jacobian matrix can be used to predict the voltage collapse point.
F. Karbalaei, H. Soleymani, S. Afsharnia
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