Results 231 to 240 of about 30,425 (260)

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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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.
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Technique for online prediction of voltage collapse

IEE Proceedings - Generation, Transmission and Distribution, 2004
A new technique for predicting voltage collapse in power systems in an online mode is described. This technique uses the voltage magnitude and voltage angle information at buses and the network admittance matrix to predict voltage collapse. The performance of the technique was studied for a variety of operating conditions.
V. Balamourougan, T.S. Sidhu, M.S. Sachdev   +2 more
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Voltage collapse phenomena in wind parks

18th International Conference and Exhibition on Electricity Distribution (CIRED 2005), 2005
Wind power is rapidly growing in the world. For reasons of economy the network interconnection is often designed without redundancy. This means that the nominal power of the transformer to the transmission system is in the range of the nominal power of all wind generators of a wind farm. Short circuit faults are in power systems unavoidable and cause a
G. Brauner, M. Heidl, D. Tiefgraber, M. Weniger, H. Haidvogl   +4 more
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An approach for estimating the static voltage collapse

2005 International Power Engineering Conference, 2005
The law of how the minimum absolute eigenvalue of the Jacobian matrix varies with the load of power systems is analyzed, based on which a new approach is proposed to estimate the static voltage collapse. BPA is used to calculate power flows with the increasing loads. Using the new approached method, the critical point of the static voltage collapse can
null Huang Wei, null Zhang Guohua, null Yang Jingyan, null Liu Zongqi, null Zhang Jianhua   +4 more
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Resonance and Collapse of Voltage

IFAC Proceedings Volumes, 2004
R.E. Correa-Gutiérrez, J. Collado M.
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Voltage Stability Transition during Voltage Collapse

IEEJ Transactions on Power and Energy, 1992
Hiroshi Ohtsuki, Akihiko Yokoyama, Yasuji Swkine   +2 more
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