Results 51 to 60 of about 107 (80)
Gaoya dianqi, 2010 在隔离开关切合容性小电流试验中,回路中可能会由于隔离开关的多次重燃而产生特快速暂态过电压（very fast transient overvoltage,VFTO）,这对试验回路中的设备和元件,尤其是试验变压器绕组绝缘构成了很大的威胁。笔者利用ATP-EMTP电磁暂态仿真软件计算了隔离开关进行分闸操作时在试验变压器端部出现的VFTO,分析了影响重燃过电压大小的因素,并研究了利用在试验变压器输出端加装保护间隙时的保护效果。仿真结果表明,分闸时重燃过电压与发生重燃的时间有关,与燃弧时间无关 ...
孟峥峥, 齐效华, 吕亮, 李彦明
doaj
Influence of Switching Conditions on the VETO Magnitudes in a GIS
, 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).
Naidu, MS, Thomas, JM, Kumar, VV
core
To thoroughly analyze the high-frequency and high-amplitude electromagnetic disturbances generated during disconnector operation, this paper proposes an equivalent modeling approach based on dynamic arc behavior.
Bingyu Mei +7 more
core +1 more source
Design of Wideband GHz Electric Field Sensor Integrated with Optical Fiber Transmission Link for Electromagnetic Pulse Signal Measurement. [PDF]
Sensors (Basel), 2018 Zhang G +5 more
europepmc +1 more source
Development and application of integrated optical sensors for intense E-field measurement. [PDF]
Sensors (Basel), 2012 Zeng R, Wang B, Niu B, Yu Z.
europepmc +1 more source
Gaoya dianqiGIS中的隔离开关在操作过程中由于断口重复击穿会产生特快速瞬态过电压（very fast transient overvoltage，VFTO）。VFTO幅值高、波前陡，严重威胁电气一次绝缘，并会产生电磁干扰问题。目前，实际工程中除采用带投切电阻的隔离开关抑制VFTO外，还可以采用磁环型阻尼母线对VFTO进行抑制。为了保证GIS的可靠性，磁环型阻尼母线抑制性能的优劣至关重要。为此，亟需研究提出一种在试验室进行磁环抑制效果的评定方法。文中针对磁环型阻尼母线的抑制性能，设计了专门的抑制性能试验回路 ...
杨喜龙 +6 more
doaj
Simulation and Measurement of Restriking Voltage
, 2012 [[abstract]]DS has no arc extinction capability, during the movement of contact poles (for 0.5~2 seconds), there could appear with the repetitions of arc-inception and arc-extinction phenomena.
C. H. Lee;S. L. Chen;C. C. Yang
core
Berichte über die Diskussionen der Studienkomitees der CIGRE. [PDF]
Elektrotech Informationstechnik, 2020 europepmc +1 more source
Upper Frequency Bound on Circuit-Based Models for Transformer Windings
, 2018 The power generation, transmission and utilisation are necessarily being carried out at different voltage levels, and require transformers for performing the voltage level conversions. As a result, transformers form one of the most critical elements of
Santosh, J
core
Development of a Multi-Channel Ultra-Wideband Electromagnetic Transient Measurement System. [PDF]
Sensors (Basel)He S, Chen X, Zhang B, Song L.
europepmc +1 more source