Results 11 to 20 of about 7,424,509 (170)

A novel embedded voltage‐clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage

High Voltage
The submodule in multilevel modular converters experiences a very fast transient overvoltage (VFTO) during switch operation of gas‐insulated switchgear, which also results in overvoltage on power devices, such as thyristors and insulated gate bipolar ...
Hong Shen, Zhonghao Dongye, Mian Xiao, Jiayi Shao, Xiangyu Zhang, Yao Yao, Zifan Dong, Lei Qi   +7 more
doaj   +2 more sources

Analyses on an electronic voltage transformer's failure by its resonance with very fast transient overvoltage and suppression

High Voltage
As voltage measuring devices are widely used in the high voltage power system with a primary‐secondary‐fusion structure, electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic ...
Houda Zhu, Qing Chen, Hongbin Li, Yue Tong, Linshan Han, Yang Jiao   +5 more
doaj   +2 more sources

Empowering and conquering infirmity of visually impaired using AI‐technology equipped with object detection and real‐time voice feedback system in healthcare application

CAAI Transactions on Intelligence Technology, EarlyView., 2023
Abstract The Internet of Things is emerging as a crucial technology in aiding humans and making their lives easier. Among the human population, a large percentage of people suffer from disabilities resulting in challenges in everyday life particularly people with visual disabilities.
Hania Tarik, Shahzad Hassan, Rizwan Ali Naqvi, Saddaf Rubab, Usman Tariq, Monia Hamdi, Hela Elmannai, Ye Jin Kim, Jae‐Hyuk Cha   +8 more
wiley   +1 more source

Protection against transient overvoltage in precision AC-DC measurement system [PDF]

, 2020
: Reduction in size and improvement of sensitive margins in modern semiconductor devices makes them increasingly susceptible to stress and subsequent damage caused by the overvoltage.
Kgakatsi, Thato E., Golovins, Eugene, Dan-Valentin, Nicolae, Venter, Johan   +3 more
core   +1 more source

Impact of PWM Voltage Waveforms in High-Speed Drives: A Survey on High-Frequency Motor Models and Partial Discharge Phenomenon

Energies, 2022
The insulation system’s dielectric of the electric motor is very often subjected to severe electrical stress generated by the high dv/dt seen at the machine’s terminals.
Davide D’Amato, Jelena Loncarski, Vito Giuseppe Monopoli, Francesco Cupertino, Luigi Pio Di Noia, Andrea Del Pizzo   +5 more
doaj   +1 more source

Transfer Function Based Modeling of the Air-Cored Transformers for Very Fast Transient Overvoltage Studies [PDF]

, 2009
In this paper, to calculate overvoltage in air-cored transformer windings under very fast transient overvoltage, firstly, the voltage transfer functions are calculated which are measured by network analyser or calculated from the distributed parameters ...
Esmaiilzadeh, S., Niayesh, K., Agheb, E., Jadidian, J., Hashemi, E.   +4 more
core   +1 more source

Design of a novel transmission circuit of transient electromagnetic instrument

Gong-kuang zidonghua, 2014
A transmission circuit of transient electromagnetic instrument based on FPGA was designed in order to improve measurement accuracy of transient electromagnetic instrument. Drive circuit of the transmission circuit was designed with module EXB841 to drive
XU Yakun, LI Guocai, ZHAO Zhenting, LIAN Kun   +3 more
doaj   +1 more source

Investigating the Effect of Several Model Configurations on the Transient Response of Gas-Insulated Substation during Fault Events Using an Electromagnetic Field Theory Approach

Energies, 2020
Assessment of very fast transient overvoltage (VFTO) requires good knowledge of the behavior of gas-insulated substation when subjected to very high frequencies.
Muresan Alexandru, Levente Czumbil, Roberto Andolfato, Hassan Nouri, Dan Doru Micu   +4 more
doaj   +1 more source

Signatures of Transient Overvoltages in Low Voltage Power Systems in Tea Factories and Their Implications on Insulation Deterioration and Allied Power Quality Issues

Journal of Electrical and Computer Engineering, 2021
Electrical equipment and supply cables demand a better quality of supply, with the recent advancements in integrated sensitive solid-state controls.
Earl A. R. L. Pannila, Mahesh Edirisinghe   +1 more
doaj   +1 more source

Analysis of influential factors in determining very fast transient overvoltages of GIS substations [PDF]

, 2014
High voltage Gas Insulated Substation (GIS) is threatened by Very Fast Transient Overvoltage (VFTO) which is high amplitude and high frequency transient within the range from 100 kHz up to 50 MHz in power systems. Operation of Disconnecting Switch is the
Nourirad, Ghasem, Babaei, Mehdi, Maziar Babaei, Babaei, Maziar, Ghasem Nourirad, Mehdi Babaei   +5 more
core   +1 more source