Results 1 to 10 of about 1,585 (211)
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
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Research and Experiments on an External Miniaturized VFTO Measurement System [PDF]
Sensors, 2019 Disconnect switch and circuit breakers operations in gas insulated switchgear (GIS) systems may produce very fast transient overvoltage (VFTO). Detecting VFTO is the first step for researchers to reduce the damage to other equipment of the substation ...
Lizhe Wang +5 more
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Research on On-Line Detection Method of Transformer Winding Deformation Based on VFTO [PDF]
Sensors, 2021 At present, the detection of transformer winding deformation faults is carried out in an offline state, which requires the transformer to cooperate with the implementation of planned power outages, or it takes place after the sudden failure of the ...
Yanyun Wang +7 more
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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
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Research on Online Detection Method of Transformer Winding Deformation Based on VFTO Characteristics
Energies, 2023 At present, most of the winding fault detections of transformers use offline methods, which require the entire line to be powered off or after the transformer has been shut down due to a serious fault, and they cannot detect the running status of the ...
Xinghua Shi, Ran Wei, Wenbin Zhang
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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
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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
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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
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Capacitive Sensor for the Measurement of VFTO in GIS [PDF]
11th International Symposium on High-Voltage Engineering (ISH 99), 1999 A capacitive sensor based on the theory of electric field measurements using floating electrodes has been developed for the measurement of VFTO and the same has been fitted to the metallic enclosure of a 145kV gas insulated substation (GIS) experimental test setup available in the laboratory.
Kumar, Vinod V, Joy, Thomas M
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VFTO computation in 420 kV GIS
11th International Symposium on High-Voltage Engineering (ISH 99), 1999 This paper presents the results of Very Fast Transient Overvoltage (VFTO) computations that have been carried out using EMTP for various switching conditions in a 420 kV gas insulated substation. The variation of VFTO peak along the nodes for disconnector and circuit breaker operations as well as the variation of VFTO with different trapped charges ...
Kumar, Vinod V, Joy, Thomas M, Naidu, MS
openaire +3 more sources