Very fast transient overvoltage vfto

Results 21 to 30 of about 107 (80)

Research on Conducted Disturbance to Secondary Cable Caused by Disconnector Switching Operation

Frontiers in Energy Research, 2022
The disconnector switching operation in GIS not only generates very fast transient overvoltage (VFTO) in primary equipment, but also couples to the secondary system, which affects normal operation of the secondary equipment.
Xiaoyue Chen +6 more
doaj +1 more source

Interference Analysis of Very Fast Transient Overvoltages in Gas-Insulated Substations Using a Hybrid Algorithm

Sukkur IBA Journal of Emerging Technologies
The reliable and efficient computational approach for the cable interference in gas insulated substations (GIS) is presented. The hybrid domain decomposition method-multilevel fast multi-pole algorithm (DDM-MLFMA) is presented herein.
Muhammad Bilal +5 more
doaj +1 more source

Suppressing resonance in transformer winding under very fast transient overvoltage

, 2016
This paper presents a new method for suppressing internal resonance in power transformers connected to gas insulated substation (GIS) due to very fast transient overvoltage (VFTO) in the GIS.
Abu-Siada, Ahmed +4 more
core +1 more source

A Novel Power Transformer Condition Monitoring System Based on Wide-Band Measurement of Core Earth Signals and Correlation Analysis With Multi-Source Data

IEEE Access, 2019
On-line condition monitoring and real-time fault detection are essential to protect power transformers from unscheduled outage of services. The core earth signals (CES) are valuable for fault detection and diagnosis of power transformers, as they are ...
Xuezhi Ke, Lisheng Pang, Xiang Dong, Zhaohui Li +3 more
doaj +1 more source

Outdoor Insulation and Gas Insulated Switchgears

, 2022
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

GIS中隔离开关多次重燃弧模型计算与分析

Gaoya dianqi, 2023
在气体绝缘开关设备（gas insulated switchgear,GIS）中，隔离开关在操作过程中会产生快速暂态过电压（very fast transient overvoltage,VFTO），精确的隔离开关电弧模型对快速暂态过电压的仿真起着关键的作用。文中在分段电弧的基础之上，利用ATP-EMTP软件搭建了隔离开关多次重燃弧模型；为了研究负载端残余电荷对VFTO的影响，文中选取多组不同幅值的残余电压。仿真结果表明：基于分段电弧的多次重燃弧模型产生的VFTO谐波幅值比传统的时变电阻电弧模型要大 ...
张普, 莫付江, 刘欣桐, 王凡
doaj

Modeling of Common Mode Interference of Secondary Side of Potential Transformer in VFTO Excitation

Shanghai Jiaotong Daxue xuebao
Very 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

Preventing transformer internal resonance under very fast transient overvoltage using RC surge suppressor

, 2017
© 1994-2012 IEEE. This paper investigates the feasibility of a cost effective method to prevent internal resonance in power transformers connected to gas insulated substation (GIS) due to very fast transient overvoltage (VFTO) within the GIS.
Abu-Siada, Ahmed +3 more
core +1 more source

GIS中阻尼母线等效装置的抑制仿真研究

Dianci bileiqi, 2023
超高压GIS中隔离开关的开闭合可能产生特快速暂态过电压(Very Fast Transient Overvoltage, VFTO),而VFTO会对GIS及其相连设备造成破坏，因此如何削弱VFTO对其他设备的影响迫在眉睫。以某500 kVGIS变电站为研究对象，对隔离开关开闭过程进行仿真建模，模拟VFTO的产生并对其波形进行分析，随后对避雷器的抑制效果进行了仿真验证，然后对只加装阻塞特定频带的阻波器进行了特性仿真，最后对阻尼母线方法进行优化。通过对比不同措施下的VFTO仿真结果 ...
李佰霖, 赵国胜, 柯学志, 付文龙 +3 more
doaj

A Test Method for Response Behavior of Metal-Oxide Arrester Subjected to Transient Electromagnetic Disturbances

, 2022
Metal-oxide arresters (MOA) are widely used to protect equipment against transient electromagnetic disturbances (TED) like very fast transient overvoltage (VFTO), high-altitude electromagnetic pulse (HEMP), lightning pulse, et al.
Ge, Yan-Peng +7 more
core +1 more source

vfto
隔离开关
电弧模型

very fast transient overvoltage
7. clean energy