Results 211 to 220 of about 30,425 (260)
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IEEE Transactions on Power Systems, 1990
The dynamic phenomena of power system voltage collapse are analyzed by the method of dynamic simulation using induction motor models. From the viewpoint of dynamic phenomena, the voltage collapse starts locally at the weakest node and spreads out to the other weak nodes. The main conclusions drawn from this study are as follows.
Y. Sekine, H. Ohtsuki
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The dynamic phenomena of power system voltage collapse are analyzed by the method of dynamic simulation using induction motor models. From the viewpoint of dynamic phenomena, the voltage collapse starts locally at the weakest node and spreads out to the other weak nodes. The main conclusions drawn from this study are as follows.
Y. Sekine, H. Ohtsuki
exaly +2 more sources
Dynamic mechanisms of voltage collapse
Systems and Control Letters, 1990Abstract This paper presents the result of a thorough voltage stability analysis of a simple power system. Three mechanisms of dynamic voltage collapse are incorporated: generator excitation limit, load dynamics and on-load tap-changer. The effect of each individual mechanism is analyzed first and then the combined effects are used to reconstruct a ...
Chen-Ching Liu
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Voltage collapse risk assessment
Electric Power Systems Research, 2000Abstract Several approaches have been proposed in the literature to analyze system voltage collapse, based on indices that can efficiently evaluate the load margin for which the system remains stable. All this discussion, including possible methods of solution, is being carried out under deterministic assumptions; load, generation and transmission ...
R B Prada, A C Zambroni De Souza
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Discussion on some voltage collapse indices
Electric Power Systems Research, 2000Abstract This paper discusses some voltage collapse indices with the help of bifurcation theory. Two main topics are presented: first, the identification of a well-behaved eigenvalue as a function of load increase; second a theoretical interpretation of the results. For this purpose, the center manifold theorem is employed.
A C Zambroni De Souza
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Time to voltage collapse dependence of load shedding to avoid voltage collapse
2017 IEEE Electrical Power and Energy Conference (EPEC), 2017Power transmission systems of today are operating closer to their limits due to economic and environmental constrains. As a consequence, many systems around the world experience voltage collapse leading to partial or complete blackouts. Load shedding is a cost effective solution for preventing system collapse.
Tara Alzahawi +2 more
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THE CAPABILITY OF ALTERNATORS IN VOLTAGE COLLAPSE ANALYSIS
Electric Machines & Power Systems, 1997ABSTRACT The paper presents and discusses the static models of the synchronous machines used in voltage collapse analysis, taking into account the capability limits.The paper considers the thermal limits of rotor and stator currents (dependent on voltage and real power), the underexcitation limiters action that prevents from the stator-end heating ...
BERIZZI, ALBERTO +3 more
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Loss of voltage controllability as a cause of voltage collapse
Proceedings of the 27th IEEE Conference on Decision and Control, 2003Voltage 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), 2012Novel 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 +2 more
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Tools for Voltage Collapse Assessment
MELECON 2006 - 2006 IEEE Mediterranean Electrotechnical Conference, 2006A 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, 2003A 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 +3 more
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