Results 211 to 220 of about 28,705 (265)

Time to voltage collapse dependence of load shedding to avoid voltage collapse

2017 IEEE Electrical Power and Energy Conference (EPEC), 2017
Power 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, Mohindar S. Sachdev, G. Ramakrishna   +2 more
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

Dynamic mechanisms of voltage collapse

Systems & Control Letters, 1990
Abstract 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 ...
Vu, Khoi T., Liu, Chen-Ching
openaire   +2 more sources

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
openaire   +1 more source

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

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
openaire   +1 more source

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.
V. Storvann, E. Hillberg, K. Uhlen
openaire   +1 more source

Voltage collapse proximity index determination using voltage phasors approach

IEEE Transactions on Power Systems, 1995
In the paper, a "phasor concept" of voltage collapse proximity determination is presented. An adequate voltage proximity index is calculated based on the voltage phasor values only. Furthermore, an algorithm is derived which automatically detects the network transmission paths to the load nodes which are prone to voltage collapse due to additional real
F. Gubina, B. Strmcnik
openaire   +1 more source