Results 131 to 140 of about 889 (166)
Some of the next articles are maybe not open access.
2025 10th Asia Conference on Power and Electrical Engineering (ACPEE)
In recent years, with the rapid development of new power grid structures such as pumped storage power stations and high-voltage direct current transmission, ultra-high voltage (UHV) and extra-high voltage (EHV) equipment have experienced multiple ...
Hao Wang, Wei Wang
semanticscholar +1 more source
In recent years, with the rapid development of new power grid structures such as pumped storage power stations and high-voltage direct current transmission, ultra-high voltage (UHV) and extra-high voltage (EHV) equipment have experienced multiple ...
Hao Wang, Wei Wang
semanticscholar +1 more source
Design Optimization of Ferrite Rings for VFTO Mitigation
IEEE Transactions on Power Delivery, 2017Very fast transient overvoltage (VFTO)-related problems are raising growing concerns in China with the development of ultra-high voltage. The practice of fitting ferrite rings on gas-insulated switchgear busbars for VFTO mitigation has long been proposed but few investigations on its' design optimization were conducted. Based on theoretical analysis of
Jiaxi He +4 more
openaire +1 more source
2025 IEEE International Conference on Energy Technologies for Future Grids (ETFG)
Frequent circuit breaker failures induced by 750kV disconnector operations have been reported, yet existing research lacks in-depth analysis of such incidents.
Zhaojun Jiang, Junbo Deng
semanticscholar +1 more source
Frequent circuit breaker failures induced by 750kV disconnector operations have been reported, yet existing research lacks in-depth analysis of such incidents.
Zhaojun Jiang, Junbo Deng
semanticscholar +1 more source
Characteristic Analysis on Suppressing VFTO in GIS by Ferrite
Advanced Materials Research, 2013When disconnecting switches were operated,Very Fast Transient Overvoltage (VFTO) did great harm to power systems and their equipments in Gas Insulated Substations (GIS). Although VFTO can be suppressed by a few of known methods, there were some problems.
Xiang Gen Gan +3 more
openaire +1 more source
Energies
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.
Bin Liu +7 more
semanticscholar +1 more source
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.
Bin Liu +7 more
semanticscholar +1 more source
Measurement of VFTO Based on the Transformer Bushing Sensor
IEEE Transactions on Power Delivery, 2011Disconnector switching operations in large gas-insulated switchgear (GIS) systems may produce very fast transient overvoltages (VFTOs), causing high electric stress to other apparatuses in the substation, such as power transformers. This paper presents a VFTO measuring technique based on a transformer bushing sensor, which consists of the transformer ...
Guo-Ming Ma +3 more
openaire +1 more source
Experimental Study on the Interrelationships of VFTO, TEV, and EMF in Ultra-High Voltage Substations
2024 2nd China Power Supply Society Electromagnetic Compatibility Conference (CPEMC)The interrelationship between very fast transient over-voltage (VFTO), transient enclosure voltage (TEV), and electromagnetic fields (EMF) is crucial for understanding the formation mechanism of switching transients in Gas Insulated Substations (GIS ...
Jun Zhao +5 more
semanticscholar +1 more source
Calculation of Influence of VFTO Signal on Insulation of Main Equipment in 500kV Power Station
2021 4th Asia Conference on Energy and Electrical Engineering (ACEEE), 2021The very fast transient over voltage (VFTO) caused by switching operation in GIS power station may threats equipment insulation especially transformers to research this problem, EMTP is adopted to calculate the overvoltage in 500 kV power station and a ...
Ren Hongtao, Chenyi Li
semanticscholar +1 more source
Study on VFTO Influence of Main Equipment’s Safety Performance in UHV Substation
2024 6th International Conference on Power and Energy Technology (ICPET)In UHV Gas Insulated Switchgear (GIS) substation, Very Fast Transient Overvoltage (VFTO) may occur during the operation of disconnector. VFTO stresses the GIS itself, turn-to-turn insulation of transformers, and all the secondary equipment connected to ...
Ruiming Fan, Lei Wan, Yang Li, Lei Wang
semanticscholar +1 more source
A Novel Capacitance Determination Method of Metal Oxide Arrester Blocks when Excited by VFTO
2021 IEEE 5th Conference on Energy Internet and Energy System Integration (EI2), 2021In recent years, the Ultra-High Voltage(UHV) and Extra-High Voltage (EHV) power system has been greatly developed. Subsequently, Gas Insulated Substation(GIS) has received more extensive attention and applications.
Jie Chen +5 more
semanticscholar +1 more source