Results 41 to 50 of about 940 (189)
New mitigation methods for transient overvoltages in gas insulated substations [PDF]
, 2012 During switching of disconnectors (DS) in GIS a varying number of pre-strikes and re-strikes occur. Due to the very short duration of the voltage collapse, traveling surges are generated in the busbar duct.
Burow, Simon +3 more
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Conductance fluctuations in diffusive rings: Berry phase effects and criteria for adiabaticity
, 2000 We study Berry phase effects on conductance properties of diffusive mesoscopic conductors, which are caused by an electron spin moving through an orientationally inhomogeneous magnetic field. Extending previous work, we start with an exact, i.e.
A. F. Morpurgo +27 more
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Performance improvement of MO surge arrester using high gradient arrester block against VFTOs [PDF]
, 2019 It is well known that the metal oxide surge arrester is inoperative against very fast transients overvoltages (VFTOs) because of its strong stray capacitive effect.
Raju, Kannadasan
core +2 more sources
Universal basic education : an overall strategy of investment priorities for economic growth [PDF]
, 1989 Includes bibliographical references (p. 27-28)
Boediono, McMahon, Walter W.
core
Influence of Switching Conditions on the VETO Magnitudes in a GIS [PDF]
IEEE Power Engineering Review, 2001 Estimation of very fast transient overvoltage (VFTO) has been carried out using EMTP for various switching conditions in a 420 kV gas-insulated substation (GIS). The variation of the VFTO peak along the GIS bus nodes for disconnector and circuit breaker switching operations, as well as the variation of VFTO peak with different magnitudes of trapped ...
Kumar, VV, Thomas, JM, Naidu, MS
openaire +2 more sources
Boletín oficial de la provincia de León: Num. 57 (09/11/1896) [PDF]
, 1895 Copia digital. Valladolid : Junta de Castilla y León.
León (Provincia). Diputación Provincial
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合闸电阻对1000 kV GIS高压隔离开关VFTO的抑制研究
Gaoya dianqi, 2021 为了得到合闸电阻在GIS高压隔离开关VFTO抑制中更加合理的值,采用双曲线电阻模型、2～5Ω的定值电阻模型、Mayr电弧模型组合成一个动态电弧模型来描述高压隔离开关电弧燃弧模型的预击穿阶段、稳态燃烧阶段和熄弧阶段,并通过改变合闸电阻在动态电弧模型各个阶段的电阻值来求得电弧各个阶段的最佳VFTO抑制值,再通过取各个阶段的最佳电阻值的平均值作为合闸电阻的最优电阻值。并结合了某1 000 kV特高压变电站分析了其内部关键设备处VFTO的极值 ...
刘子英, 张靖, 吴文辉
doaj
Gaoya dianqi, 2015 影响快速暂态过电压（very fast transient overvoltage,VFTO）因素很多,其中气体变电站（GIS）设备模型的选择对VFTO计算结果精确度的影响不可忽略。笔者采用考虑弧道电感特性的电弧电阻模型,结合国外某1 000 k V GIS变电站,详细计算了GIS内部的VFTO,分析了GIS内部关键设备处VFTO的极值。结果表明,用考虑弧道电感特性的电弧电阻模型模拟隔离开关的电弧的物理过程,进而对VFTO研究是适用的。最后还研究了入口电容、静态电感、GIS支路长度对VFTO的影响。
刘德东 +3 more
doaj
Nanocrystalline based Mitigation Technique for Very Fast Transient over Voltages in Gas Insulated Substations [PDF]
, 2021 : in gas insulated substations, issue of very fast transient over voltages is very familiar problem because of its effects on live ultra-high voltage equipment.
et. al., R.Durga Rao,
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