Results 251 to 260 of about 445,363 (308)

Transformer faults and protection systems

14th International Conference and Exhibition on Electricity Distribution (CIRED 1997 - Distributing Power for the Millennium), 1997
Although safety of property and persons, respect for the environment and improvement of operating conditions have always formed part of the aims of power network operators, these matters are gaining in importance daily as the Century draws to a close, given that the basic functions have been acquired.
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Earth fault protections with sensors

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013), 2013
Earth faults are the most common type of fault in medium voltage networks. Earth fault (EF) protection based on residual current detection is therefore the basic protection used in protection systems. Since small isolated and compensated MV networks with low levels of earth fault currents are now increasing in popularity, the use of earth fault ...
M. Celko, V. Prokop
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Fault Attack Protection and Evaluation

2020
Fault attacks can obstruct the normal system execution by injecting errors into the hardware. By radiating the critical circuit components with high energy particle strikes, voltage transients are created to make the circuit malfunction temporarily. In recent years, fault attacks have demonstrated a great capability of leaking the cryptographics keys ...
Meng Li, David Z. Pan
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Protection System Faults ¿ a Comparative Review of Fault Statistics

2006 International Conference on Probabilistic Methods Applied to Power Systems, 2006
Correct operation of the protection system is of vital importance for the reliability and security of supply. Information of protection system faults is therefore important for different purposes such as quality of supply regulation and as input data to security and reliability analysis.
G. H. Kjolle, O. Gjerde, B. T. Hjartsjo, H. Engen, L. Haarla, L. Koivisto, P. Lindblad   +6 more
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Fault classification for distance protection

IEEE/PES Transmission and Distribution Conference and Exhibition, 2003
This paper presents an overview of power system fault classification methods and challenges. It also contains some ideas about structured testing.
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Overcurrent and earth fault protection

1993
Fuses are a very satisfactory form of protection for the lower voltage and current sections of power networks because their operating time/current characteristics are similar in form to the withstand time/current characteristics of the circuits they protect.
C. Christopoulos, A. Wright
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Fault development and protection

1998
DC converter stations form an integral part with the AC-power system, and their basic protection philosophy is thus greatly influenced by AC-system protection principles. There are, however, two technical reasons which influence some departure from the conventional protection philosophy, i.e.
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HVDC Fault Analysis and Protection Scheme

2021
Long-distance transmission presents issues related to transmission losses due to long and multiple transmission cables. High-voltage direct current transmission technology provides key advantages in the bulk transmission of energy as compared to other modes of transmission.
Sankarshan Durgaprasad, Shreya Nagaraja, Sangeeta Modi   +2 more
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Overvoltage protection, faults and voltage sags

2004 11th International Conference on Harmonics and Quality of Power (IEEE Cat. No.04EX951), 2005
Distribution transformers in rural networks have to cope with frequent lightning induced overvoltages and thus must be protected using spark gaps or surge arresters. The overvoltage protection type has an influence on the system behaviour and on the interruptions and voltage sags experienced by power system customers. In this paper, measurement results
P. Heine, M. Lehtonen, A. Oikarinen
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Protecting distribution feeders for simultaneous faults

2010 63rd Annual Conference for Protective Relay Engineers, 2010
Overhead distribution systems may experience faults involving more than one feeder. During simultaneous faults, the transformer low-voltage-side overcurrent relay measures a current greater than the current measured by faulted feeder relays. Therefore, the transformer relay may trip faster than faulted feeder relays.
Jorge Betanzos Manuel, Hector E. Lemus Zavala, Eliseo Alcazar Ramirez, David Sanchez Escobedo, Hector J. Altuve   +4 more
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