Results 211 to 220 of about 733,401 (250)

Voltage sag stochastic estimate

Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248), 2002
The probabilistic nature of the electromagnetic phenomenon that characterizes a voltage sag makes the establishment of tendencies based only upon monitoring results quite a difficult work to be done. Simulations of short circuits deterministically predict their behavior in various types and situations of possible short circuits.
M.F. Alves, V.R.C. Fonseca
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Method to Select Optimal Device for Mitigating Voltage Sag Based on Voltage Sag Assessment

The Transactions of The Korean Institute of Electrical Engineers, 2015
This paper presents a method to select optimal device for mitigating voltage sags. The method is based on economic evaluation and voltage sag assessment involving sag duration as well as magnitude. The economic evaluation is performed by using the operation cost and economic benefit of the mitigation devices.
Kyebyung Lee, Jong-Hoon Han, Gilsoo Jang, Chang-Hyun Park   +3 more
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Voltage Sag Studies in Distribution Networks—Part III: Voltage Sag Index Calculation

IEEE Transactions on Power Delivery, 2006
Power quality indices have been developed to assess the performance of a single site or an entire system. They can guide utilities to improve their systems and can be used by manufacturers to decide about equipment immunity. This paper is the third part of a joint paper aimed at predicting the voltage sag performance of distribution networks by ...
J.A. Martinez, J. Martin-Arnedo
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A fast single-phase voltage sag detection for voltage sag compensation system

TENCON 2014 - 2014 IEEE Region 10 Conference, 2014
This paper proposes a fast single-phase voltage sag detection for voltage sag compensation system. The operation of proposed method is based on synchronously rotating reference frame which provides fast and accurate voltage sag detection. a proposed fast single-phase voltage sag detection uses the differentiator as a (−90)-degree phase shifter to ...
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Voltage sag detection - A survey

2009 International Conference for Technical Postgraduates (TECHPOS), 2009
Voltage sag has been the focus of considerable research in recent years. It can cause expensive downtime. Research on voltage sag detection has also grown up and it is an essential part of the voltage sag compensator. There are many methods have been introduced to measure and detect voltage sags.
Muhamad Mansor, Nasrudin Abdul Rahim
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Voltage sag: Malaysian's experience

POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151), 2002
Voltage sag is one of the major components of power quality of an electric power system. In Malaysia, transmission system's disturbance becomes a dominant source. Voltage sag affects every customer, however, industrial customers are the most affected.
B. Sawir, M.R. Ghani, A.A. Zin, A.H. Yatim, H. Shaibon, K.L. Lo   +5 more
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Tutorial on voltage sag analysis

Ninth International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.00EX441), 2002
Voltage sags are known as a serious problem causing mal-operation of equipment like computers, process controllers and adjustable-speed drives. In this tutorial various analysis techniques for voltage sags are introduced: characterization of individual sags from measurements as well as from theoretical calculations; stochastic assessment (prediction ...
M.H.J. Bollen, E. Styvaktakis
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Overview of voltage sag mitigation

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002
This paper gives an overview of methods used in the mitigation of voltage sags. Different solutions for improving the performance of the power system, as well as the immunity of the equipment, are described. Finally, mitigation devices to be installed at the system-load interface for power quality enhancement are presented.
A. Sannino, M.G. Miller, M.H.J. Bollen
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Voltage sags in industrial systems

Conference Record. Industrial and Commercial Power Systems Technical Conference 1991, 1993
A description is given of the causes of voltage sags in industrial plants, their impact on equipment operation, and possible solutions. The definition proposed focuses on system faults as the major cause of voltage sags. The sensitivity of different types of industrial equipment, including adjustable speed drive controls, programmable logic controllers,
M.F. McGranaghan, D.R. Mueller, M.J. Samotyj   +2 more
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Voltage sag compensation with energy optimized dynamic voltage restorer

IEEE Transactions on Power Delivery, 2002
The compensation capability of a dynamic voltage restorer (DVR) depends primarily on the maximum voltage injection ability and the amount of stored energy available within the restorer. A new phase advance compensation (PAC) strategy for the DVR is proposed in order to enhance the voltage restoration property of the device.
Vilathgamuwa, Mahinda, Perera, A.A.D.R., Choi, San Shing   +2 more
openaire   +2 more sources