Results 1 to 10 of about 1,997 (175)

Prediction Model for the DC Flashover Voltage of a Composite Insulator Based on a BP Neural Network

, 2023
To be able to predict the DC flashover characteristics of composite insulators, a four-layer BP neural network model is established with composite insulator shed structure parameters as the input. Three algorithms (gradient descent with momentum, RMSProp
Zhenan Zhou, Haowei Li, Chuyan Zhang, Silun Wen   +3 more
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Experimental study and modeling of the effect of ESDD/NSDD on AC flashover of SiR outdoor insulators [PDF]

, 2022
Pollution flashover occurs when soluble and nonsoluble materials cover the surface of an insulator, and this may ultimately cause a reduction in its performance.
Krzma, Adnan, Adnan Krzma, Haddad, Abderrahmane Manu, Abderrahmane Manu Haddad, Maurizio Albano, Slama, Mohammed El Amine, Mohammed El Amine Slama, Albano, Maurizio   +7 more
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Investigation of Lightning-Initiated Flashover Faults in Medium Voltage Overhead Lines - Modelling and Experimental Evaluation

, 2016
Lightning can cause flashovers on Medium Voltage (MV) lines from both direct and nearby strikes. The work presented in this dissertation thoroughly investigates the characteristics of lightning-initiated flashover faults, expected overvoltage stress and ...
Mahmood, Farhan
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Waveforms of Impulse Voltage and Their Creeping Flashover Voltage Characteristics [PDF]

, 1961
Four kinds of impulse voltages(0.1x40),(1x40),(6x40)μs and(3x40)μs having unidirectional oscillations on its wave tail have been applied to two electrodes which were arranged on the surface of glass,vinyland porcelain pipes,and then creeping flashover ...
長田, 晋吾, NAGATA, Shingo
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Flashover phenomena of polluted insulators energized by AC voltage [PDF]

, 1999
The study of polluted insulator flashover mechanism very important for electric power transmission reliability, efficiency and sewiceability. In this paper, a new mathematical model based on Ayrton arc voltage gradient equation, which takes account of ...
Ahmad, Hussein, A.S. Ahmad, Salam, Md. Abdus, T. Tamsir, Tamsir, Tarmidi, A. Salam, Buntat, Z., Piah, M. A. M., M.A.M. Piah, Z. Buntat, Ahmad, Ahmad S., H. Ahmad   +11 more
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Flashover Voltage Prediction Models under Agricultural and Biological Contaminant Conditions on Insulators [PDF]

, 2022
The flashover performance of contaminated insulators highly depends on the type of pollutant and its present concentration. In this paper, important agricultural salts (NaCl, K2SO4, NaHCO3, CaSO4, KHCO3, MgSO4, NH4), 2Fe(SO4)2, and 6H2O (ferrous ammonium
Lucian Mihet-Popa, Basem Alamri, Asfar Ali Khan, Shabana Khatoon, Khatoon, Shabana, Khan, Asfar Ali, Mihet-Popa, Lucian, Mohd Tariq, Tariq, Mohd, Alamri, Basem   +9 more
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Effects of Absolute Humidity on Flashover Voltage of Insulators

IEEJ Transactions on Power and Energy, 2007
Effect of humidity on flashover voltage of four kinds of porcelain and one polymer insulators was studied experimentally for several years under natural humidity condition in Japan. It was found that the existing IEC humidity correction seems to be proper for most insulators regardless of the kind of applied voltage but that change may be necessary for
Fujii, Osamu, Hidaka, Kazuhiro, Mizuno, Yukio, Naito, Katsuhiko, Irie, Takashi, Nishikawa, Morio   +5 more
openaire   +2 more sources

Electrical Circuit Flashover Model of Polluted Insulators under AC Voltage Based on the Arc Root Voltage Gradient Criterion

, 2012
In order to study the flashover mechanism of polluted insulators under AC voltage, a new arc propagation criterion which is based on an arc root voltage gradient is proposed.
Qing Yang, Sima, Wenxia, Lan, Xing, Jiang, Chilong, Xing Lan, Chilong Jiang, Zahn, Markus, Markus Zahn, Yang, Qing, Wang, Rui, Wenxia Sima, Rui Wang   +11 more
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Laser-triggered surface flashover characteristics of polycarbonate with pulsed voltage

, 2010
Based on the platform of laser-triggered surface flashover in pulsed voltage, experiment of laser-triggered surface flashover is carried out in air and vacuum condition with pulsed voltage. A single/double harmonic, with wavelength λ of 1064/532 nm, Q-
Sun, G, Wang, Y, Ruzheng Pan, Ping Yan, Youhua Wang, Guangsheng Sun, Xu, W, Zhizhong Zhao, Pan, R, Wang, J, Wei Xu, Zhao, Z, Jue Wang, Yan, P   +13 more
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Displacement Current and Surface Flashover [PDF]

, 2007
High-voltage vacuum insulator failure is generally due to surface flashover rather than insulator bulk breakdown. Vacuum surface flashover is widely believed to be initiated by a secondary electron emission avalanche along the vacuum-insulator interface.
G. J. Caporaso, Harris, J. R., Blackfield, D., Caporaso, G. J., Chen, Y. J., J. R. Harris, Y.-J. Chen, D. Blackfield   +7 more
core   +1 more source