Results 261 to 270 of about 120,363 (295)

Loss of voltage controllability as a cause of voltage collapse

Proceedings of the 27th IEEE Conference on Decision and Control, 2003
Voltage stability and controllability definitions are proposed that can be applied at any time instant along the transient stability model trajectory or at the equilibrium point. Voltage controllability is defined at PQ buses. Conditions on sensitivity matrices that guarantee voltage controllability are then developed.
R.A. Schlueter, M.W. Chang, A. Costi
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Indicating and mitigating voltage collapse comparing voltage stability indicators

2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 2012
Novel measures to indicate and mitigate voltage collapse in the power system are presented in this paper. The functionality of conventional and unconventional indicators and mitigating actions are tested in a case study using the IEEE Reliability Test System 1996.
Vegar Storvann, Emil Hillberg, Kjetil Uhlen   +2 more
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Tools for Voltage Collapse Assessment

MELECON 2006 - 2006 IEEE Mediterranean Electrotechnical Conference, 2006
A variety of tools and techniques used for voltage stability analysis in power systems are discussed in this paper, with particular emphasis on their application to electricity markets. Thus, the computation of transfer capability limits, which are directly associated with the security constraints used in energy auction systems, by means of ...
C.A. Canizares, S.K.M. Kodsi
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Voltage collapse scenario search

Proceedings. International Conference on Power System Technology, 2003
A cascading failure involves seemingly unexpected loss of many critical components such as transmission lines and generators. A cascading failure often leads to separation of the system into islands and results in the loss of a substantial amount of load.
Y. Koyama, T. Sasaki, S. Ihara, E.R. Pratico   +3 more
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Dynamic simulation of voltage collapse

Conference Papers Power Industry Computer Application Conference, 1990
The problem of voltage collapse is approached by simulation of a power system using a slightly modified transient stability program. A sufficiently complex system with 39 buses and ten generators is used in the simulations. The system is stressed by progressively increasing the system load through a multiplier k.
M.M. Begovic, A.G. Phadke
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Indicators for Voltage Collapse Margins

2010 Asia-Pacific Power and Energy Engineering Conference, 2010
This paper introduces several different indices in order to characterize the voltage stability of a power system. Voltage instability is a phenomenon which often contributes to the development of power system disturbances. Therefore, is very important to know how a power system is close to voltage collapse.
Claudia Reis, F. P. Maciel Barbosa
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Estimation of time to voltage collapse

2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC), 2016
Finding out remained time to voltage instability occurrence is necessary to make a timely decision on corrective actions. This paper presents a novel method for discovering time to long term voltage instability. The method is based on virtually acceleration of OLTCs' operation during time domain simulation in order to realizing detection of long ...
M. Khalilifar, M. Joorabian, S. Gh. Seifosadat, S. M. Shahrtash   +3 more
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Voltage collapse: case studies

Power Quality '98, 2002
This paper presents an analytical approach for the identification of optimal locations and sizes of reactive power compensation required to improve power system voltage stability. The paper also describes reactive compensation planning necessary to avoid a power system collapse similar to that which occurred in Australia's Hydro-Electric Corporation ...
M. Negnevitsky, R.L. Le, M. Piekutowsky
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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
openaire   +1 more source