Results 21 to 30 of about 940 (189)
Dianci bileiqi, 2022 GIS中的隔离开关操作将会产生高幅值的VFTO,从而损害其设备造成系统故障。为了更加经济地抑制VFTO,提出了基于粒子群优化算法来抑制VFTO最佳铁氧体磁环尺寸的方法。通过模拟GIS中磁环对于VFTO抑制效果的分析，得出了磁环模型等效电阻和等效电感的取值范围；建立磁环尺寸参数的数学模型，利用粒子群优化算法优化得出最小的磁环尺寸。最后基于ATP-EMTP软件对某一1 100 kV GIS进行建模仿真，对比磁环优化前后对于VFTO幅值抑制效果。结果表明：优化前磁环和优化后磁环都能达到相同的抑制效果 ...
刘子英, 刘洋
doaj
Outdoor Insulation and Gas Insulated Switchgears [PDF]
, 2023 This book focuses on theoretical and practical developments in the performance of high-voltage transmission line against atmospheric pollution and icing.
core +1 more source
The Journal of Engineering, Volume 2019, Issue 4, Page 3418-3424, April 2019., 2019 This study analyses a gas insulated switchgear explosion accident caused by a failure of the circuit breaker (CB) in a thermal power plant, which resulted in the explosion of the CB and the burning of the potential transformer (PT). Through X‐ray detection and disassemble examination of the damaged CB, it is found that the A‐phase moveable contact was ...
Xun Zhang +6 more
wiley +1 more source
Modeling of Common Mode Interference of Secondary Side of Potential Transformer in VFTO Excitation
Shanghai Jiaotong Daxue xuebaoVery fast transient overvoltage (VFTO) is generated during the operation of isolation switches and circuit breakers in substations, which can affect the safe and reliable operation of power secondary equipment through cable transmission and spatial ...
PANG Fubin, JI Jianfei, WU Xianqiang, ZHOU Mengxia, YAN Wei, XU Dong
doaj +1 more source
The electromagnetic effect study of GIS enclosure under high‐frequency electromagnetic pulse
The Journal of Engineering, Volume 2019, Issue 16, Page 2837-2841, March 2019., 2019 In gas insulated switchgear (GIS) substation, due to the operation of disconnect switch and circuit breaker, as well as short‐circuit fault, SF6 will break down very rapidly. The superposition of refraction and reflection of high‐frequency travelling waves will cause the very fast transient electromagnetic pulse (EMP).
Shu Chen +6 more
wiley +1 more source
"El Vitor" a la Inmaculada en Nava del Rey [PDF]
, 1981 En número dedicado a: La provincia de ...
Padilla Montoya, Carmen +1 more
core +3 more sources
The Journal of Engineering, Volume 2019, Issue 16, Page 2921-2925, March 2019., 2019 An accurate computational model of transformer winding for potential distribution analysis under impulse voltage is very important for the design of transformer inter‐turn insulation, especially for large capacity transformers such as ultrahigh‐voltage DC (UHVDC) converter transformer.
Shuang He +7 more
wiley +1 more source
Four-Letter Super Connoisseur\u27s Ladders [PDF]
, 2001 Four-letter words are famously well connected to each other. Fewer than one per cent of words connect to no other, whereas over 70 per cent in each of the four possible positions-on average, there are 23 neighbours for each word.
Gooch, Rex
core +1 more source
The Structure of Potentially Semi-Stable Deformation Rings [PDF]
, 2011 Inside the universal deformation space of a local Galois representation one has the set of deformations which are potentially semi-stable of given p-adic Hodge and Galois type. It turns out these points cut out a closed subspace of the deformation space.
Kisin, Mark
core +1 more source
Upper bound of overvoltage peak induced in power line network above lossless ground due to radiated electromagnetic disturbances [PDF]
, 2023 This paper deals with the assessment of the maximal peak of the overvoltage induced in a power-line network due to the field-to-wire coupling from an external electromagnetic disturbance.
Liang, Tao +3 more
core +1 more source