Results 231 to 240 of about 28,705 (265)

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
openaire   +1 more source

Voltage collapse - experience and modelling

IEE Colloquium on Voltage Collapse, 1997
The problems found in the control of voltage will depend on the geography of the power system (relative location of power sources and demand, terrain), demand levels and the development stage reached, for instance, the type and amount of reactive power compensation.
openaire   +1 more source

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
openaire   +1 more source

Discussion on some voltage collapse indices

Electric Power Systems Research, 2000
Abstract 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.
openaire   +1 more source

Energy functions analysis in voltage collapse

European Transactions on Electrical Power, 2001
AbstractTime‐domain approach examines the behaviour of the system, one determines whether stability has been maintained or lost. In contrast to the time‐domain approach, direct methods determine system stability based on energy functions. The basis of direct methods for the stability assessment of a system is knowledge of the stability region.
F. Jurado, J. Carpio
openaire   +1 more source

Voltage collapse prediction with locally recurrent neural networks

IEEE Power Engineering Society Summer Meeting,, 2003
Voltage stability studies aim to evaluate the ability of a power system to keep acceptable value of voltages at all nodes either under normal or contingency conditions. Voltage instability involves generation, transmission, and distribution and includes a wide range of phenomena.
PILO, FABRIZIO GIULIO LUCA, Loddo, M., CELLI, GIANNI, Usai, M.   +3 more
openaire   +3 more sources

Voltage Collapse Based Critical Bus Ranking

2011
Identification of critical or weak buses for a given operating condition is an important task in the load dispatch centre. It has become more vital in view of the threat of voltage instability leading to voltage collapse. This paper presents a fuzzy approach for ranking critical buses in a power system based on line flow index and voltage profiles at ...
Shobha Shankar, T. Ananthapadmanabha
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Voltage collapse proximity indicators for radial distribution networks

2007 9th International Conference on Electrical Power Quality and Utilisation, 2007
Based on the single-line equivalent system of a radial distribution network, two simple methods to evaluate two efficient voltage collapse proximity indicators are presented and discussed. The two methods differ on the determination of the parameters which define the equivalent system from which the indicators are derived.
AUGUGLIARO, Antonino, DUSONCHET, Luigi, MANGIONE, Stefano   +2 more
openaire   +2 more sources