Results 11 to 20 of about 452 (193)

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

Simulation on Operating Overvoltage of Dropping Pantograph Based on Pantograph–Catenary Arc and Variable Capacitance Model

Applied Sciences
When the electric locomotive pantograph is dropping, the interruption of pantograph catenary contact causes electromagnetic oscillation and arcing. The frequent arc burning that occurs due to charge accumulation results in the amplitude of overvoltage ...
Dazuo Jiang, Huanqing Zou, Yike Guo, Fuqiang Tian, Hongqi Liu, Yufeng Yin   +5 more
doaj   +2 more sources

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   +3 more sources

Very Fast Transient Overvoltage Analysis on 245 kV Gas Insulated Substation

, 2022
{"references": ["1.\tKapur, A. K., & Malik, A. K. (1991, August). Gas insulated substations in India-an overview. In TENCON'91. Region 10 International Conference on EC3-Energy, Computer, Communication and Control Systems (Vol. 1, pp. 461-466). IEEE.", "2.\tKoch, H. J. (Ed.). (2014). Gas insulated substations.
Anuj Paul, Kartik Kapse, Nilesh Chaudhari, Pavan Karpe, R. A. Ahire   +4 more
openaire   +4 more sources

Propagation and mitigation of Very Fast Transient Overvoltage in Gas Insulated Substation

, 2015
Mycket snabba transienter (eng. Very Fast Transients) är överspänningar som skapas till exempel när en frånskiljare öppnas eller stängs (DS). På grund av de mycket högfrekventa påkänningar som de utövar på utrustningen och deras storlek (upp till 3 pu), utgör de en viktig fråga i utformningen av ultrahögspännings gasisolerade ställverk.
Galliano, Francois
openaire   +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

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

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

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