Results 1 to 10 of about 319 (150)
Development and Experimental Research of VFTO Measuring Sensor [PDF]
Sensors, 2022 Very fast transient overvoltage (VFTO) generated by an operating disconnector is one of the main reasons for electromagnetic disturbance in gas-insulated switchgear (GIS) substations.
Zihan Teng +4 more
doaj +2 more sources
Research on Ultra-Fast Transient Overvoltage Characteristics of Electric Locomotive
Applied SciencesOperating overvoltage occurs when the pantograph or main breaker of an electric locomotive is operated, which is prone to causing insulation failure of high-voltage equipment.
Yike Guo +3 more
doaj +3 more sources
A Review of Research Progress in Very Fast Transient Overvoltage (VFTO) Suppression Technology
EnergiesThe very fast transient overvoltage (VFTO) is characterized by steep wavefronts, high amplitude, and wide spectrum. These characteristics can lead to partial discharges or insulation breakdowns in potted insulators, which can lead to localized ...
Huan Wang +3 more
doaj +3 more sources
Energies, 2023 To address the problem of winding turn-to-turn breakdown faults in 35 kV dry-type transformers in wind farms under overvoltage conditions, this paper establishes a simulation model based on the structural dimensions and material parameters of the ...
Ziheng Pu +4 more
doaj +1 more source
Energies, 2023 A High-Altitude Electromagnetic Pulse (HEMP) could induce very fast transient overvoltage (VFTO) with nanosecond level rise time and mega-volt amplitude, which severely threatens the electrical devices connected to the elevated transmission line.
Zheng Liu +6 more
doaj +1 more source
The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network
Energies, 2022 The FDS (Frequency-domain Dielectric Spectroscopy) of oil-immersed insulation paper, and semi-conductive paper with different moisture content, has been measured.
Zhonghuan Su +5 more
doaj +1 more source
Energy Reports, 2023 The very fast transient overvoltage/overcurrent (VFTO/VFTC) signals generated during disconnectors switching operation may result in a significant threat to the reliability of power grids.
Zhenhua Li +5 more
doaj +1 more source
南方能源建设, 2022 [Introduction] Massive usage of gas-insulated metal-enclosed switchgear (GIS) has caused serious electromagnetic interference, especially when the isolating switch in GIS is operated with small capacitive current, it does not have arc extinguishing ...
LI Jiahui
doaj +1 more source
Research on VFTO Identification of GIS Based on Wavelet Transform and Singular Value Decomposition
Energies, 2022 The accurate identification of Very Fast Transient Overvoltage (VFTO) is the key of overvoltage control in modern smart grids. In order to accurately identify VFTO generated by the operation of a disconnector in Gas Insulated Substation (GIS), a VFTO ...
Gang Xiao +7 more
doaj +1 more source
IET Generation, Transmission & Distribution, 2023 The operation of disconnectors in gas insulated substation (GIS) or power plant will produce very fast transient overvoltage (VFTO), which is considered to have serious harm to transformer longitudinal insulation and other high‐voltage equipment ...
Runyu Fu +6 more
doaj +1 more source