Results 21 to 30 of about 797,708 (244)

Space charge dynamics in oil and thick pressboard combined system under polarity reversal voltage [PDF]

, 2014
In this study, the space charge dynamics in an oil and oil impregnated pressboard combined insulation system are investigated by the means of pulsed electroacoustic (PEA) technique under voltage polarity reversal conditions. To be closer to the real case
Hao, Miao, Gordon Wilson, Yuan Zhou, George Chen, Wilson, Gordon, Miao Hao, Paul Jarman, Zhou, Yuan, Jarman, Paul, Chen, George   +9 more
core   +1 more source

UHF diagnostic monitoring techniques for power transformers [PDF]

, 2004
This paper initially gives an introduction to ultra-high frequency (UHF) partial discharge monitoring techniques and their application to gas insulated substations.
Bennoch, C.J., Hunter, Ian, B.B., Judd, M.D., Yang, L.   +3 more
core   +3 more sources

Monitoring of medium voltage distribution networks by balance smart meters [PDF]

E3S Web of Conferences
This study addresses the issue of monitoring the unbalanced load flow of power distribution networks. To that end, instead of relying on medium voltage meters, we make use of balance smart meters installed on the low-voltage side of distribution ...
Golub Irina, Voitov Oleg, Boloev Evgeny, Buchinsky Anatoly   +3 more
doaj   +1 more source

Influence of insolation and ambient temperature on operation of digital voltage transformers in Russia

MATEC Web of Conferences, 2018
The present study is devoted to questions connected with influence of solar radiation and high values of ambient air temperatures on work of digital voltage transformers.
Gotovkina Elena, Tyutikov Vladimir, Smirnov Nikolay, Lebedev Vladimir, Bushuev Evgeniy   +4 more
doaj   +1 more source

The application of the dynamic programming method in investment optimization [PDF]

Megatrend Revija, 2016
This paper deals with the problem of investment in Measuring Transformers Factory in Zajecar and the application of the dynamic programming method as one of the methods used in business process optimization.
Petković Nina, Božinović Milan
doaj   +1 more source

Augmented Models of High-Frequency Transformers for SMPS [PDF]

, 2009
The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels
Savi, Patrizia, Stievano, Igor Simone, Maio, Ivano Adolfo, Canavero, Flavio   +3 more
core   +1 more source

Challenges of Accurate Measurement of Distorted Current and Voltage in the Power Grid by Conventional Instrument Transformers

Energies, 2023
Power grids are a combined system where the electrical energy produced by the power plants is transmitted to consumers. This forms a specific interdependence where the recipients have a significant impact on the power quality.
Michal Kaczmarek, Ernest Stano
doaj   +1 more source

Research on the traceability method based on half symmetric superposition

AIP Advances, 2022
In order to achieve high-accuracy self-calibration and traceability of electromagnetic standard voltage transformers, a measurement method that can be used for voltage ratio standard error voltage coefficients is proposed.
Jin Bao, Meimei Duan, Jun Li
doaj   +1 more source

Surface tracking in the inter-phase region of large transformers

, 2008
Transmission and distribution operators throughout the world manage significant populations of ageing large transformers which use mineral oil and paper as the dielectric insulation.
Mitchinson, Peter Mark
core   +2 more sources

Optimal Operation of Distribution Electronic Power Transformer Using Linear Quadratic Regulator Method [PDF]

Journal of Intelligent Procedures in Electrical Technology, 2011
Transformers perform many functions such as voltage transformation, isolation and noise decoupling. They are indispensable components in electric power distribution system.
Mohammad Hosein Rezaei, Rahmatolah Hooshmand, Mohammad Ataei   +2 more
doaj