Results 21 to 30 of about 18,902 (308)

The impact of using phase-shift transformers on transmission lines [PDF]

, 2023
Phase shift transformers (PST) are a special type of transformers used to regulate active and reactive power on 3-phase transmission networks by adjusting the difference of voltage phase angle between system nodes.
Jawdat S. Alkasassbeh, Samara, Ashraf, Ayman Y. Al-Rawashdeh, Khalaf Y. Alzyoud, Alzyoud, Abdallah R., Alkasassbeh, Jawdat S., Ashraf Samarah, Abdallah Ershoud Alzyoud, Al-Rawashdeh, Ayman Y., Alzyoud, Khalaf Y.   +9 more
core   +2 more sources

Transformer Impedance Calculation Using the Finite Element Method [PDF]

Científica
The design and construction of power transformers are complex tasks because they are high-capacity machines and must provide high reliability during their operation within the power system.
Rodrigo Ocón Valdez, Mariana Vasquez Cañas, Leonardo A. Rico García, Fermín P. Espino Cortés   +3 more
doaj   +1 more source

Medium voltage digital instrument transformer [PDF]

E3S Web of Conferences
Instrument transformers with digital output provides significant advantages, including those related to increased reliability of power system operation.
Ulyanov Dmitriy, Plakidin Roman
doaj   +1 more source

Procedure to Evaluate the Impact in Distribution Single Phase Transformers Due to Insertion of New Nonlinear Load Which Changes Daily Demand Graphs

Energies, 2019
Power electronic development determines the introduction of nonlinear devices in electric power systems. Introduction of nonlinear devices increase current harmonics in transmission and distribution power systems.
Jorge Enrique Carrión González, Antonio Martínez García, Alfredo del Castillo Serpa, Marianela del Cisne Carrión González, Rodolfo Pabel Merino Vivanco, Kelvin Armando Alulima Carrión   +5 more
doaj   +1 more source

Estimation of the Equivalent Circuit Parameters in Transformers Using Evolutionary Algorithms

Mathematical and Computational Applications, 2023
The conventional methods of parameter estimation in transformers, such as the open-circuit and short-circuit tests, are not always available, especially when the transformer is already in operation and its disconnection is impossible.
Hector Ascencion-Mestiza, Serguei Maximov, Efrén Mezura-Montes, Juan Carlos Olivares-Galvan, Rodrigo Ocon-Valdez, Rafael Escarela-Perez   +5 more
doaj   +1 more source

THE RESEARCH ON SPECIAL ELECTRONIC POWER TRANSFORMER

Electrica, 2009
In many circumstances, three-phase AC power supply is not always the best choice for utility applications. In fact, there is a rating of three-phase to single-phase, three-phase to dual-phase and three-phase to multiphase transformers being in operation ...
Change CHEN, Chengxiong MAO, Dan WANG, Jiming LU   +3 more
doaj   +2 more sources

Detailed modelling and simulation of single-phase transformers for research and educational purposes [PDF]

, 2021
COVID-19 pandemic, despite its devastating impact, accelerated the shift to e-learning in higher education. Particularly in the electrical machines courses, that often include laboratory experiments. However, no detailed models of transformers, developed
Obaid, Zeyad Assi, Muhssin, Mazin T., Sami, Saif Sabah, Hussain, Ali N.   +3 more
core   +2 more sources

Ground Fault Protection Using Open Break Delta Grounding Transformer in Ungrounded System

Logic, 2019
One of the most common and difficult problems to solve in distribution power systems is the location and elimination of the ground fault. For the study of an electrical distribution network in ungrounded system operating at 20 kV on the primary and 380 V
Supriyanto Suhono, Hari Purnama, Heri Budi Utomo   +2 more
doaj   +1 more source

ASPECTS REGARDING THE OPERATING REGIME IN CHARGE OF SINGLE PHASE ELECTRICAL TRANSFORMERS [PDF]

Analele Universităţii "Constantin Brâncuşi" din Târgu Jiu: Seria Inginerie, 2019
The paper presents a case study on the operating regime in charge of single-phase transformers. The case study relates to a functional model that has in its configuration a single-phase electric transformer with an apparent power of 250 VA and a ...
Cristinel Popescu
doaj  

Investigation on stacked cascade multilevel inverter by employing single-phase transformers

Engineering Science and Technology, an International Journal, 2016
In the present paper a new version of multilevel inverter is investigated. This new version is based on hybrid association of commutation cells with H-bridge cells. The association allows a significant reduction of the volume of the capacitors.
Y. Suresh, Anup Kumar Panda
doaj   +1 more source