1) very fast transient
特快速暂态
1.
The model presented is a winding hybrid lumped parameter model which combines the branch model based on parallel cables in one turn with grouped-turns model of two discs to efficiently simulate the very fast transient in the coil.
由于GIS中开关的投切产生的特快速暂态过电压对变压器的绝缘危害极大,为了有效仿真线圈中的快速暂态过程,提出了一种以单匝中并联导线为单元支路和以2段线匝为单元支路相结合的集中参数混合线圈模型。
3) very fast transient overvoltage
特快速暂态过电压
1.
The Study on Transformer in Gas Insulated Substation Influenced by Very Fast Transient Overvoltage;
特快速暂态过电压对气体绝缘变电站变压器影响的研究
2.
In GIS, the switching of a disconnector will produce very fast transient overvoltage (VFTO), which could damage the insulation of GIS and other connected equipments (such as transformer) and produce electromagnetic interference into low voltage control systems.
气体绝缘金属封闭开关设备(GIS)中隔离开关的操作会产生特快速暂态过电压(VFTO),可能导致GIS本体及其相连的设备(如变压器)绝缘损坏,并可能产生电磁干扰,影响二次设备。
3.
In order to study the very fast transient overvoltage(VFTO)distribution in taper winding of pulse transformer(PT)under high-frequency voltage surge of steep front,a distributed line model of PT s secondary winding is built based on multiconductor transmission line(MTL)theory.
为了研究在陡波前、高重复频率的电压冲击下,脉冲变压器(PT)锥形绕组中的特快速暂态过电压(VFTO)分布特性,建立了基于多导体传输线(MTL)理论的PT二次绕组分布参数模型;利用锥形绕组结构上的特性,提出一种有限元法(FEM)和插值公式相结合的方法以快速计算锥形绕组的感应系数矩阵K;通过求解频域下的电报方程可得到绕组的对地电压分布以及匝间电压分布;进行了绕组暂态电压的测量,从实验结果可以看出电压分布的一定规律,并分析了造成计算与实验结果间误差的原因;结合实验提出一种改善电压分布的措施,对大功率PT二次绕组的绝缘设计有一定的参考意义。
4) VFTO
特快速暂态过电压
1.
The insulation of apparatus in the power system is often broken by the very fast transient overvoltage(VFTO)which is caused by the operation of disconnector in gas insulate substation(GIS) In this paper, a new idea for the suppressing VFTO by ferrite is put forward, and the characteristic of ferrite is analyzed.
GIS中隔离开关操作时产生的特快速暂态过电压对电力系统及其设备的绝缘具有巨大的破坏力,本文提出了采用铁氧体来抑制GIS中隔离开关操作时产生VFTO的方法,分析铁氧体抑制VFTO的优点,对VFTO的抑制效果进行了实验研究和仿真分析,探讨了具有理想抑制效果的铁氧体参数的具体要求和对理想抑制参数的铁氧体尺寸的估算方法。
2.
Very Fast Transient Overvoltage (VFTO) is a kind of switching impulse overvoltage with very steep front caused by the switching operation in Gas Insulated Substation.
特快速暂态过电压(VFTO)是由气体绝缘变电站开关操作产生的一种陡波前过电压,它的直接入侵会对变压器绕组的纵绝缘造成极大危害。
3.
Switching operations in Gas Insulated Substations (GIS) may generate Very Fast Transient Overvoltage (VFTO) which is a kind of instantaneous overvoltage lasting for a few milliseconds.
气体绝缘变电站(GIS)中的分合闸操作产生的特快速暂态过电压(VFTO)是一种持续时间几毫秒,上升沿几纳秒至几十纳秒的暂态过电压信号,它的振荡频率在几兆赫兹到几十兆赫兹。
5) very fast transient overvoltage(VFTO)
特快速暂态过电压
1.
With the help of PSCAD/EMTDC software,the very fast transient overvoltage(VFTO) which occurs during operation on main transformers and outgoing lines in the 500 kV GIS substation for Jiangsu Pumped-Storage Power Station is calculated and analyzed,and a typical 500 kV main transformer is taken as an example to describe the effects of VFTO on main transformers during various operation.
采用PSCAD/EMTDC软件计算分析了江苏抽水蓄能电站500 kV G IS变电站在主变、出线操作时的特快速暂态过电压(VFTO),并以1台典型的500 kV主变为例,分析多种操作情况下特快速暂态过电压对主变的影响。
6) very fast transient over-voltage(VFTO)
快速暂态过电压
1.
This paper presents the analysis of very fast transient over-voltage(VFTO) in GIS generated by disconnected switch operation.
阐述了气体绝缘开关装置(GIS)中隔离开关操作所产生的特快速瞬变过程(VFT),分析了快速暂态过电压(VFTO)形成的机理、特性及其对GIS本身和相连的电力变压器可能带来的危害。
补充资料：变电所快速暂态电磁场
变电所快速暂态电磁场
fast transient electro-magnetic fields in substations
变电所中快速暂态电磁场强度由于开关操作暂态过程受多种因素影响.因此变电所中实际测t得到的场强数值分散性较大。不同电压等级变电所，用不同型式开关，实测得到的电场强度可达数十千伏/米(kV/m).磁场强度可达数百安培/米(A/m).美国对变电所中操作暂态电磁场的实测工作做的较多。作为一个例子，下表列出了美国电力研究院(EPRI)在115kV、250 kV、500 kV变电所中的实测结果。常规变电所内测点在母线下方地面，操作是断开一段短母线，一川纵潮洲娜朋洲川一0 0 0 0 0 00411:1l)即10 010加 ︵任守︸侧欲典匆 6 .0臼.《】火l()《a)T(5、留一。·““nlj 0 50几00 .，0.1 10 (任/A艺侧蔽2.()魂.硬)丫﹂)()口匕t卜卜片卜f乙仁0 t 0 0 0 0 005 .....-卜闭40加020化 (‘/V)侧旧要翻，::.:: l二‘.1.吐吐.吐2.《)4.(】6 .0划) 了卜卜┌────┬──────┐│ 一一J │八L，‘一’ ││习 ├──────┤│一一.1 │{犷V一· │└────┴──────┘0﹃-j门1 96，JD.任1 9 tl滩n乙oq乙 ︵三z淤巴侧翻要御 (一。一‘)洲.‘}12‘)一6(，义1‘，一‘， 喊d)T(5) 500 kV变电所内断开隔离开关时 的地面电场和磁场(a)GIS磁场;(b)GIS电场;(e)AIS滋场;(d)AIS电场b一and一onsuo kuolsu zonto一d一onelehong变电所快速暂态电磁场(fast transient elec-tromagnetie fields in substations)变电所中隔离开关切、合短母线时的暂态过程产生的电磁场。高压隔离开关操作时，触头间产生一系列电弧过程。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条