Results 121 to 130 of about 370 (172)

Fetal mouse hearts: a model for studying ischemia. [PDF]

Proc Natl Acad Sci U S A, 1975
Ingwall JS, DeLuca M, Sybers HD, Wildenthal K.   +3 more
europepmc   +1 more source

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

THE BACTERIOLOGY OF THE MOUTH IN MAORI CHILDREN: Being Part of an Investigation into the Cause of Immunity to Dental Disease in the Maori of the Uriwera Country, N.Z. [PDF]

Br Med J, 1913
Pickerill HP, Champtaloup ST.
europepmc   +1 more source

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Measurement And Analysis Of VFTO In a 750kV Substation

2010 Asia-Pacific Power and Energy Engineering Conference, 2010
Disconnector operations in GIS may generate very fast transient overvoltage (VFTO), which is characterized by its high peak value, short rise time, and high frequencies. Mostly, researches on VFTO are focusing on the apparatus involving in the active circuit. However, VFTO may pass through open devices by electromagnetic coupling. To measure VFTO under
Guo-Ming Ma, Cheng-Rong Li, Jiang-Tao Quan   +2 more
exaly   +2 more sources

Study on VFTO in UHV GIS substation

2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011
In GIS substations, operations of disconnectors may cause very fast transient overvoltage (VFTO) with high amplitude and steep wave front. Considering the narrower insulation margin of UHV GIS equipments and larger absolute magnitude of VFTO in UHV GIS systems, VFTO in UHV GIS systems could cause larger damage than those in EHV and lower ones ...
Wan Yiru, Chen Guang, Zhou Hao
openaire   +2 more sources

Experimental Research on Suppressing VFTO in GIS by Magnetic Rings

IEEE Transactions on Power Delivery, 2013
Very-fast transient overvoltage (VFTO) is a serious threat to the insulation of extra-high voltage and ultra-high voltage power-system equipment and should be suppressed. A simpler and more reliable VFTO suppressing method than a shunt resistor is presented in this paper, which uses magnetic rings installed on the center conductor of gas-insulated ...
Zhibing Li
exaly   +2 more sources

Simulation of VFTO Suppression Methods for 1100kV GIS Substation

2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC), 2019
Disconnector switch operation in GIS will generate VFTO, which will harm the equipment. Because there are many limitations in field measurement, simulation can overcome the limitations of experimental research, which can replace test measurement to a certain extent. In this paper, three VFTO suppression methods are simulated in ATP-EMTP.
Qingquan Li, Mu Qiao
exaly   +2 more sources

Numerical Analysis of a Spiral Tube Damping Busbar to Suppress VFTO in 1000 kV GIS

Applied Sciences (Switzerland), 2019
Gas insulated substations (GISs) are broadly used for transmission and distribution in electric power networks. Very fast transient overvoltage (VFTO) caused by SF6 discharge during switching operations in a GIS may threaten the insulation of electrical ...
Reem A Almenweer, Xixiu Wu
exaly   +2 more sources

Improved SVD-MPM Applied in Spectral Analysis of VFTO

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE), 2022
Kang He, Xianqiang Li
exaly   +2 more sources

Influence of switching conditions on the VFTO magnitudes in a GIS

IEEE Transactions on Power Delivery, 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.
Naidu, MS, Kumar, Vinod V, Thomas, Joy M
exaly   +1 more source