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Overvoltage transient protection network design
Proceedings of the International Conference on Electromagnetic Interference and Compatibility, 1999Transient 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), 2016Very 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 +4 more
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Study of lightning overvoltage transients using ATP
2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2015], 2015Rapid 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, 1996This 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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Measuring transient overvoltage on instrument feeders
Radio and Electronic Engineer, 1964The problem of obtaining information on unwanted transient voltages which may damage semiconductors is considered in relation to electricity generating and switching stations. It is concluded that the collection of data from actual sites by an unattended monitoring instrument would yield valuable information with the minimum effort.
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Calculation of energy in transient overvoltages
National Symposium on Electromagnetic Compatibility, 2003It is argued that the calculation of the energy in a transient overvoltage using the time integral of V/sup 2/(t)/Z, where Z has the default value of 50 Omega and the voltage, V(t), is that between the hot conductor in the AC line and ground, is inaccurate. A quantitative error analysis is presented that uses an artificial AC line network to simulate a
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Computation of Very Fast Transient Overvoltages in Transformer Windings
IEEE Power Engineering Review, 2002The paper deals with the computation of very fast transient overvoltages (VFTO) in transformer windings. For this purpose an algorithm is developed. The applied algorithm uses a hybrid model, which is a combination of the multi-conductor transmission line model (MTLM) and the single-transmission line model (STLM).
Popov, M. (author) +3 more
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Research on Transient model of Transient Enclosure Overvoltage in UHV GIS
2019 Chinese Automation Congress (CAC), 2019With the increase of voltage grade, the effects of electromagnetic transient process of power system should not be ignored. In order to provide the theoretical reference for UHV substation, continuous optimization models is very important. In this thesis, we do some calculations and analysis of the TEV which occurs in 1100kV substation of south ...
Qiang Zhang +6 more
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Harmonics and transient overvoltages due to capacitor switching
[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference, 1993This work presents a study of the steady-state and transient effects of power factor correction capacitors on the utility and on the customer. In the presence of harmonic-producing loads, capacitors used for power factor correction can cause parallel or series resonance problems which tend to increase the total harmonic distortion (THD) of the voltage ...
A.A. Girgis +3 more
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Equations for some transient overvoltage test waveforms
IEEE Transactions on Electromagnetic Compatibility, 1988Simple equations are provided that satisfy the definitions of five of the most common transient overvoltage test waveforms: the ringwave specified in ANSI C62.41-1980, the fast transient specified in IEC 801, and the 8/20- mu s 1.2/50- mu s, and 10/1000- mu s waveforms.
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