Results 21 to 30 of about 69,905 (289)

Variable Reactance Criteria to Mitigate Voltage Deviations in Power Transformers in Light- and Over-Load Conditions

open access: yesMachines, 2023
In this paper, variable reactance (VR) criteria are proposed to mitigate voltage deviations in power transformers under light-load inductive and capacitive conditions, as well as for over-load conditions.
Marta Haro-Larrode
doaj   +1 more source

Parameter estimation of electric power transformers using Coyote Optimization Algorithm with experimental verification [PDF]

open access: yes, 2020
In this work, the Coyote Optimization Algorithm (COA) is implemented for estimating the parameters of single and three-phase power transformers. The estimation process is employed on the basis of the manufacturer's operation reports.
Abaza, Amlak   +4 more
core   +1 more source

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

open access: yesE3S 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   +3 more
doaj   +1 more source

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

open access: yesMegatrend 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

Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]

open access: yes, 2006
In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Ramírez, Jorge, Valecillos, Baudilio
core   +3 more sources

A Solid State Transformer model for power flow calculations [PDF]

open access: yes, 2017
This paper presents the implementation of a Solid State Transformer (SST) model in OpenDSS. The goal is to develop a SST model that could be useful for assessing the impact that the replacement of the conventional iron-and-copper transformer with the SST
Guerra Sánchez, Luis Gerardo   +1 more
core   +2 more sources

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

open access: yesMATEC 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   +4 more
doaj   +1 more source

Research on the traceability method based on half symmetric superposition

open access: yesAIP 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

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

open access: yesEnergies, 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

Enhanced Electric Vehicle Integration in the UK Low Voltage Networks with Distributed Phase Shifting Control [PDF]

open access: yes, 2019
Electric vehicles (EV) have gained global attention due to increasing oil prices and rising concerns about transportation-related urban air pollution and climate change.
Denai, Mouloud, Vega-Fuentes, Eduardo
core   +3 more sources

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