Results 171 to 180 of about 9,833 (209)

Transient overvoltages on power systems

IEE Proceedings C Generation, Transmission and Distribution, 1986
Power systems are subjected to many forms of transient phenomena brought about essentially by sudden changes in the steady state values of voltages or currents. Such changes may be the result of a lightning stroke, some malfunction of the system or be brought about by the switching of a circuit either to clear a fault or as a normal operational ...
J.P. Bickford, A.G. Heaton
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Galvanostatic transients and crystallization overvoltage

Canadian Journal of Chemistry, 1978
The theory of galvanostatic transients is extended to include the formation of a three-dimensional crystalline layer. The mechanism of formation of this layer is assumed to be one of nucleation and subsequent growth of randomly distributed nuclei on the electrode surface.
Stephen Fletcher, Arthur Smith
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Transient Overvoltage Testing of Environmental Controllers

Transactions of the ASAE, 1992
The integrated electronic control system will provide a new method for the day-to-day management of environmental control of animal production systems. No standards are currently accepted for transient overvoltage protection of these controllers. To assess the adequacy of existing designs, a test circuit was designed and used for a transient open ...
null R. S. Gates, null L. W. Turner, null D. G. Overhults   +2 more
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Very first transient overvoltages in GIS

POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151), 2002
A differentiating/integrating (D/I) system which does not change GIS (gas insulated substation) configuration is developed for the measurement of very fast transient overvoltages (VFTO) occurring in GIS. Then the numerical computation of VFTO is studied on the base of field measurement results.
null Zhang Wenyuan, null Shi Baozhuang, null Qiu Yuchang   +2 more
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Transient overvoltages in mine power systems

2022
 This thesis investigates the nature and magnitude of switching transient overvoltages that can be expected in inductively grounded underground coal mines. Computer models of power system equipment have been developed to analyse single-phase fault isolations; motor starts (including prestriking) and motor turn offs.
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Transient overvoltage protection for UPS applications

2011 IEEE Trondheim PowerTech, 2011
Uninterruptible Power Supplies (UPS) are used to ensure a continuous and reliable supply to critical loads. Different UPS technologies are available, offering different levels of load protection and power conditioning. This paper discusses various UPS topologies and operating modes, identifying the paths over which a surge or transient voltage may ...
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Overvoltage transient protection network design

Proceedings of the International Conference on Electromagnetic Interference and Compatibility, 1999
Transient over-voltages caused by lightning, couples on to data communication or instrumentation signal lines and introduce serious fault alarm conditions and damage instrumentation electronics. Protection circuits to minimise the transient over-voltage are commercially available for variety of installation requirements.
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Simulation studies on very fast transient overvoltage

2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2016
Very fast transient overvoltage (VFTO) not only influence the operating reliability of GIS, but also causes great threat to the insulation of the high-voltage equipment, especially to windings of the transformer. Taking a 550kV GIS substation as the object, VFTO characteristics, generation mechanism and influencing factors are studied in the paper ...
Baina He, Yunwei Zhao, Guichun Huang, Yuanchao Hu, Yunzhu An   +4 more
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Study of lightning overvoltage transients using ATP

2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2015], 2015
Rapid development of transmission and distribution network requires an in-depth research and development work for their proper operation. Protection of the components used in transmission and distribution substations is one of the most important factors which must be taken care of in a very efficient manner. In this paper the analysis of lightning over
T. Chatterjee, A. Mukherjee
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Transient sheath overvoltages in armoured power cables

IEEE Transactions on Power Delivery, 1996
This paper is concerned with methods of limiting the build-up of transient voltages between sheath and armour in long armoured power cables. Calculations by a frequency dependent cable model demonstrate that this voltage can be efficiently limited to an acceptable level by introducing sheath-armour bondings at regular intervals, or by using a ...
B. Gustavsen, J. Sletbak
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