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Journal articles on the topic 'Transformer booth'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Jyothi, B., A. Pandian, and P. Bhavana. "Fabrication and experimental analysis of multiple-winding transformers for multiphase supply." Measurement and Control 53, no. 3-4 (2020): 662–78. http://dx.doi.org/10.1177/0020294019897086.

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This paper aims to fabricate multiple-winding transformers for polyphase supply that means more than the classical three-phase supply. Usually, transformers do not change the phase, that is, from single phase to three phase or vice versa, but according to the required power applications, transformer windings are connected in such a way to get the desired phase supply. Transformers are connected to implement three or more phases, which are generally referred as polyphase or multiphase transformers. In order to obtain three-phase transformers from one single unit with respect to the required pha

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2

Wu, Jing, Kun Li, Jing Sun, and Li Xie. "A Novel Integrated Method to Diagnose Faults in Power Transformers." Energies 11, no. 11 (2018): 3041. http://dx.doi.org/10.3390/en11113041.

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In a smart grid, many transformers are equipped for both power transmission and conversion. Because a stable operation of transformers is essential to maintain grid security, studying the fault diagnosis method of transformers can improve both fault detection and fault prevention. In this paper, a data-driven method, which uses a combination of Principal Component Analysis (PCA), Particle Swarm Optimization (PSO), and Support Vector Machines (SVM) to enable a better fault diagnosis of transformers, is proposed and investigated. PCA is used to reduce the dimension of transformer fault state dat

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Gheorghe, Veronica-Carmen, and Radu Burlică. "Performance Improvement of Distribution Transformers for the Energy System." Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section 70, no. 1 (2024): 21–34. https://doi.org/10.2478/bipie-2024-0002.

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Abstract Rapid advances and developments in the design, modernization, and optimization of transformers have generated an increase in power for the lines of distribution, with transformers occupying important positions in the national and international power systems. This paper compares both the output parameters generated by the design process, the values obtained between 400 kVA transformers, a distribution transformer with conservative, and a hermetic transformer with air cushion (EPA). We use the same construction of the transformer core with columns and yokes made of a sheet of steel with

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Oktavianus Rikardus Waro and Aris Heriandriawan. "Analisis Umur Pakai Transformator Distribusi 800 Dan 1600 kVA Di PDAM Ngagel Surabaya." Venus: Jurnal Publikasi Rumpun Ilmu Teknik 2, no. 2 (2024): 01–17. http://dx.doi.org/10.61132/venus.v2i2.234.

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Distribution transformers have a very important role in the electric power system. The lifespan of transformers in electric power systems will decrease over time. The reduced service life of distribution transformers is caused by several factors, including loading, ambient temperature, transformer winding temperature and transformer oil temperature. The author uses quantitative and qualitative research types. This research was conducted to determine the remaining useful life of distribution transformers. The data used in this research are transformer template data and peak load data during the

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Sun, Yuanyuan, Gongde Xu, Na Li, et al. "Hotspot Temperature Prediction of Dry-Type Transformers Based on Particle Filter Optimization with Support Vector Regression." Symmetry 13, no. 8 (2021): 1320. http://dx.doi.org/10.3390/sym13081320.

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Both poor cooling methods and complex heat dissipation lead to prominent asymmetry in transformer temperature distribution. Both the operating life and load capacity of a power transformer are closely related to the winding hotspot temperature. Realizing accurate prediction of the hotspot temperature of transformer windings is the key to effectively preventing thermal faults in transformers, thus ensuring the reliable operation of transformers and accurately predicting transformer operating lifetimes. In this paper, a hot spot temperature prediction method is proposed based on the transformer

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Platero, Carlos A., José Ángel Sánchez-Fernández, Konstantinos N. Gyftakis, Francisco Blázquez, and Ricardo Granizo. "Performance Problems of Non-Toroidal Shaped Current Transformers." Sensors 20, no. 11 (2020): 3025. http://dx.doi.org/10.3390/s20113025.

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Nowadays, non-toroidal shape primary pass-through current transformers are commonly used for large current machines with several cables per phase. As these transformers exhibit no radial symmetry, it is not clear if they can be tested using the indirect test described in the IEC 61869 standard. In order to answer this question, two non-toroidal shaped current transformers of different secondary winding designs have been tested and simulated. One transformer has a uniformly distributed secondary winding and the other has a partially distributed secondary winding. Both transformers have the same

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Li, Wei, Yifan Bian, Yunyun Zhang, Erbiao Zhou, and Lirong Xie. "Research on the Carbon Footprint Accounting Method of Transformer’s Whole Life Cycle Under the Background of Double Carbon." Energies 18, no. 3 (2025): 499. https://doi.org/10.3390/en18030499.

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In response to the existing gaps in the carbon footprint assessment framework for core electrical equipment transformers, which impedes power companies from effectively supporting low-carbon procurement of materials and products, this study proposes a novel evaluation method for transformer carbon footprints. This method comprehensively considers all stages of the transformer lifecycle, including manufacturing, transportation, installation, operation, and decommissioning. A review of mainstream carbon footprint accounting schemes, both domestic and international, is first presented, summarizin

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8

Wagh, Nikhil. "Automatic Load sharing of Transformer using Arduino." INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 05 (2025): 1–9. https://doi.org/10.55041/ijsrem47007.

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Abstract - Transformer is basically a static device which transfers the electrical power from one circuit to another circuit with desired change in voltage and current at constant frequency. It is only one device which operates at highest efficiency at full load condition. But abnormal condition occurs at overloading condition which may result in severe problem in future. To avoid such condition, we are using other standby transformer which supplies the load when overloading occurs on main transformer unit, which switch on automatically by Arduino. This will result in efficient loading of both

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9

Barseghyan, Sarkis, Arman Hayrapetyan, and Armen Kirakosyan. "Ecological assessment of noise impact of dry transformer substations on the environment." E3S Web of Conferences 265 (2021): 02011. http://dx.doi.org/10.1051/e3sconf/202126502011.

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At present, special attention is paid to assessing the negative impact of power facilities on the environment, including the impact of noise generated by power equipment. Power transformers are one of the sources of noise for industrial areas and the surrounding area. The noise of transformers is caused both by the vibration of its active part and by the fans of the cooling system, which is amplified by resonance phenomena in its individual elements. The presented work provides an environmental assessment of the noise impact of transformer substations. The noise impact of a transformer substat

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Ivankić, Josip, Igor Žiger, Bruno Jurišić, and Dubravko Franković. "Accuracy Performance of Open-Core Inductive Voltage Transformers at Higher Frequencies." Energies 18, no. 8 (2025): 2121. https://doi.org/10.3390/en18082121.

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The new revision of the main instrument transformer standard, IEC 61869-1:2023, premiered requirements for the performance of instrument transformers in terms of transfer accuracy at higher frequencies. Five accuracy class extensions were introduced to establish an explicit performance level. Each of the extension levels has a distinct bandwidth and accuracy performance associated with it. While these requirements are mainly aimed at non-conventional instrument transformers, the hypothesis of this paper is that conventional high-voltage instrument transformers can have a performance conformant

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11

Narimanov, Bahodir Absalamovich. "The concept of a pumped storage power plant." Multidisciplinary Journal of Science and Technology 5, no. 5 (2025): 841–44. https://doi.org/10.5281/zenodo.15465097.

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12

Miteva, Neda, Lior Sima, and Kfir Jack Dagan. "Power Loss Calculation in Oil-Type Distribution Transformers Supplying Nonlinear Loads." Electronics 14, no. 12 (2025): 2500. https://doi.org/10.3390/electronics14122500.

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Power transformers are the most vital component in the electric grid. Their loss calculation is critical to transformer asset management and reflects on both operation and techno-economic assessment. Acknowledging the above, this paper presents an application of a novel loss calculation method to oil-type transformers supplying nonlinear loads. Unlike the methodology presented in std. C57.110-2018, the applied approach evaluates transformer loss components relying solely on readily available technical data. The method was experimentally validated using a full-scale 250kVA oil-type distribution

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Muhammad, Fadel, Parlin Siagian, and Muhammad Fahreza. "PENYEIMBANGAN BEBAN TRANSFORMATOR DISTRIBUSI PCC-007 UNTUK MENGURANGI RUGI-RUGI JARINGAN PADA TEGANGAN MENENGAH 20KV." Power Elektronik : Jurnal Orang Elektro 13, no. 2 (2024): 284–87. http://dx.doi.org/10.30591/polektro.v13i2.6800.

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The distribution system of electrical power networks serves as a means to distribute electrical energy to both industrial and household consumers. With the increasing population growth, the number of electrical energy users or consumers also increases, potentially impacting the loading on each distribution transformer. If the loading on each transformer increases, it can lead to overload, load imbalance, power losses, and damage to the transformer. Therefore, to ensure the proper operation of distribution transformers, PLN (a state-owned electricity company in Indonesia) has set a standard for

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Usman, Catra Indra Cahyadi, Paino, and Eriansyah S. Hasibuan. "Analisa Hasil Pengelasan Antara Trafo Las Kumparan Lilitan Pabrikan Dengan Konvensional." JURNAL MAHAJANA INFORMASI 9, no. 1 (2024): 19–24. http://dx.doi.org/10.51544/jurnalmi.v9i1.5027.

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The electric welding system requires a welding transformer that is usually classified as direct current (DC) or alternating current (AC). In electric welding, a separate transformer is provided as a source for regulating the required current during the welding process. The operation of the transformer during welding is closely related to the needs of the current, the diameter of the welding wire, and the thickness of the material being welded. The difference between a conventional coil winding transformer and a manufacturer's coil winding transformer lies in the welding results and the specime

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15

Kong, Yipeng, and Wei Chen. "Evaluation Method and Modeling Analysis of the Common Mode Noise Suppression Capability of Full-Bridge Transformers." Electronics 14, no. 2 (2025): 391. https://doi.org/10.3390/electronics14020391.

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The effective capacitance of the common mode port serves as a critical metric for assessing the common mode noise suppression capability of transformers in power converters. Conventionally, the evaluation of transformers in single-ended topologies, such as flyback converters, using a network analyzer necessitates a reference static point and a dynamic point at the transformer port. However, a full-bridge transformer without a center tap lacks a reference static point in both the primary and secondary stages. Consequently, this paper proposes an innovative measurement technique to evaluate the

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16

Pan, Bao Xiang, Shuo Nan Mao, and Lin Li. "An Electronic Transformer Calibrator Based on Multiple Approaches." Applied Mechanics and Materials 303-306 (February 2013): 329–34. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.329.

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With electronic transformers gradually being launched on the market, there is still no unified standard for electronic transformer calibration in China. According to this situation, two methods for electronic transformer calibration, the direct method and the difference method, were studied in this paper. Based on the virtual instrument technology, a novel electronic transformer calibrator compatible with both the direct method and the difference method was designed. This system is able to meet the calibration needs for electronic transformers with digital output and analog output at the same

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17

GÜLDÜREK, Manolya, and Burak ESENBOĞA. "Assessment of Corporate Carbon Footprint and Energy Analysis of Transformer Industry." Sustainability 16, no. 13 (2024): 5800. http://dx.doi.org/10.3390/su16135800.

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Transformers are primarily key components in power transmission and distribution systems. In the electrical industry, transformers are becoming increasingly important to increase energy efficiency and reduce environmental impact. In the process from the production to the use of transformers, various strategies and technologies are adopted to reduce the carbon footprint. To achieve decarbonization targets and a future with sustainable energy, ongoing efforts to reduce the carbon footprint of transformers need to continue. Therefore, this study aims to calculate the carbon footprint (CF) of Beta

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18

Rajko Gardijan and Alen Keller. "TRANSFORMER BUSHING – A PART OF MEASUREMENT SYSTEM." Journal of Energy - Energija 61, no. 1-4 (2022): 149–59. http://dx.doi.org/10.37798/2012611-4247.

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Power transformer is one of the most important and most expensive components in the electric power system (EPS) and requires, from its production and throughout lifetime, continuous monitoring and checks of the availability in the power system. All the measurements and tests on the transformer which manufacturers attempt, in order to determine the quality of their products, are carried out through the connection of different types of bushings, and these measurements and tests are conducted in accordance with requirements of applicable standards. Also, the owner of the transformer during the ex

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19

LIU, HUA-SHU, LIN MA, YUAN-TONG GU, and SHAWN NIELSEN. "NUMERICAL INVESTIGATION OF MECHANICAL AND THERMAL DYNAMIC PROPERTIES OF THE INDUSTRIAL TRANSFORMER." International Journal of Computational Methods 11, supp01 (2014): 1344012. http://dx.doi.org/10.1142/s021987621344012x.

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Industrial transformer is one of the most critical assets in the power and heavy industry. Failures of transformers can cause enormous losses. The poor joints of the electrical circuit on transformers can cause overheating and results in stress concentration on the structure which is the major cause of catastrophic failure. Few researches have been focused on the mechanical properties of industrial transformers under overheating thermal conditions. In this paper, both mechanical and thermal properties of industrial transformers are jointly investigated using finite element analysis (FEA). Dyna

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20

Wei, Jiangshu, Jinrong Chen, Yuchao Wang, Hao Luo, and Wujie Li. "Improved deep learning image classification algorithm based on Swin Transformer V2." PeerJ Computer Science 9 (October 30, 2023): e1665. http://dx.doi.org/10.7717/peerj-cs.1665.

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While convolutional operation effectively extracts local features, their limited receptive fields make it challenging to capture global dependencies. Transformer, on the other hand, excels at global modeling and effectively captures global dependencies. However, the self-attention mechanism used in Transformers lacks a local mechanism for information exchange within specific regions. This article attempts to leverage the strengths of both Transformers and convolutional neural networks (CNNs) to enhance the Swin Transformer V2 model. By incorporating both convolutional operation and self-attent

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21

Ponomarenko, Serhii. "Comparative analysis of oil ageing intensity in 110 kV transformers and 330 kV autotransformers." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 2 (3) (December 30, 2021): 124–36. http://dx.doi.org/10.20998/2224-0349.2021.02.06.

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The results of transformer oil ageing intensity analysis in 110 kV transformers and 330 kV autotransformers are presented. Using a mathematical model of variance linear regression analysis (covariance analysis model), applied to the results of periodic tests on 231 transformers of 110 kV and 49 autotransformers of 330 kV, several statistical hypotheses have been tested to estimate the intensity of drift of oil indicators during long-term operation of transformers. The following hypotheses were tested as statistical hypotheses: the hypothesis of a significant systematic drift in the values of o

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22

Orešković, Ana, Zdenko Godec, Miroslav Poljak, and Rajko Gardijan. "ON-SITE ACCURACY COMPARISON OF CAPACITOR AND INDUCTIVE VOLTAGE TRANSFORMERS." Journal of Energy - Energija 61, no. 1-4 (2022): 35–45. http://dx.doi.org/10.37798/2012611-4236.

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In this paper an on-site accuracy comparison of capacitor and inductive voltage transformers is presented. A 400/110 kV transformer substation in Croatia has been chosen as an appropriate location for the comparison as both types of transformers (capacitor and inductive) operate there simultaneously. Each transformer type is a part of one of the two existing measuring chains for measurement of electrical energy. Their accuracy comparison is, therefore, carried out indirectly, by actually comparing the energies measured by the first and the second measuring chain and then estimating the measure

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23

Nisja, Indra. "Performance of current transformer operate under harmonic condition and their effects on transformer differential protection." MATEC Web of Conferences 159 (2018): 02075. http://dx.doi.org/10.1051/matecconf/201815902075.

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This paper focused to determine the performance of Current Transformer (CT) operates under harmonics condition and their effects on transformer differential protection. A laboratory test has been implemented to determine the error produced by both CT and power transformer when operating under harmonic condition. The test was performing with the actual condition, where the power transformer is connected to an adjusted nonlinear load, so that the test can be conducted with several levels of total harmonic distortion current (THDi). The results shows, for THDi ranging from 16.70% to 40.88% the ma

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Kim, Jinwook, Do-Hyeon Kim, Jieun Kim, and Young-Jin Park. "Wireless Power Transfer between Two Self-Resonant Coils over Medium Distance Supporting Optimal Impedance Matching Using Ferrite Core Transformers." Energies 14, no. 24 (2021): 8540. http://dx.doi.org/10.3390/en14248540.

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An efficient wireless power transfer (WPT) system is proposed using two self-resonant coils with a high-quality factor (Q-factor) over medium distance via an adaptive impedance matching network using ferrite core transformers. An equivalent circuit of the proposed WPT system is presented, and the system is analyzed based on circuit theory. The design and characterization methods for the transformer are also provided. Using the equivalent circuit, the appropriate relation between turn ratio and optimal impedance matching conditions for maximum power transfer efficiency is derived. The optimal i

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25

Wajda, Józef. "Comparison of annual electrical energy losses of conventional and superconductive transformers in power lines." Journal of Automation, Electronics and Electrical Engineering 7, no. 1 (2025): 39–50. https://doi.org/10.24136/jaeee.2025.004.

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The aim of the work is to compare performance and annual results losses of electrical energy lost by transformers superconducting and conventional. The efficiency has been calculated both transformers installed in the power plant at changing load. The example used superconducting transformer with 2G0 winding. Obtained the results show 80% less energy loss per year compared to transformers with copper windings.

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Gutten, Miroslav, Daniel Korenciak, Roman Konarik, and Jan Kanuch. "Comparative Analysis of Distribution Transformers with Varying Ratings and Insulation States via Frequency Domain Spectroscopy and Capacitance Ratio." Applied Sciences 15, no. 9 (2025): 4715. https://doi.org/10.3390/app15094715.

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This paper presents a comparative analysis of distribution transformers with varying power ratings and insulation conditions using Frequency Domain Spectroscopy (FDS). The investigation was conducted both by comparing transformers with different performance ratings (from 100 to 1000 kVA) and insulation quality at a constant ambient temperature, and by evaluating insulation properties of a transformer across varying temperatures. The FDS method allows for separate assessments of oil quality and moisture content in solid insulation. An advantage of using capacitance measured by FDS for insulatio

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Rigot, Valentin, Tanguy Phulpin, Jihen Sakly, and Daniel Sadarnac. "A New 7 kW Air-Core Transformer at 1.5 MHz for Embedded Isolated DC/DC Application." Energies 15, no. 14 (2022): 5211. http://dx.doi.org/10.3390/en15145211.

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This paper presents the study of air-core transformers for electric vehicles, developing them for medium-power (tens of kWs) converter applications specifically used at a high frequency. Air-core transformers have the advantage of lacking magnetic saturation and iron losses, making them suitable for high-frequency applications. We designed and manufactured a transformer for a determined frequency and inductance value. The design of this passive component aims to both keep the magnetic field inside the transformer and manage the thermal energy efficiently. The electrical, magnetic, and thermal

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Cano-Pleite, Eduardo, Andrés Barrado, Néstor Garcia-Hernando, Emilio Olías, and Antonio Soria-Verdugo. "Numerical and Experimental Evaluation and Heat Transfer Characteristics of a Soft Magnetic Transformer Built from Laminated Steel Plates." Sensors 21, no. 23 (2021): 7939. http://dx.doi.org/10.3390/s21237939.

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The present work evaluates, both experimentally and numerically, the heat transfer characteristics of a 5 kW three-phase transformer built from laminated steel sheets. The transformer is operated at different powers, and its temperature distribution is monitored using 108 thermocouples. The experimental measurements are used firstly to determine the heat dissipated at the core and the windings of the transformer. This information is used as an input for a finite element numerical model, which evaluates the heat transfer characteristics of the transformer. The model proposed in this work simply

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Cherrat, El Amine, Iordanis Kerenidis, Natansh Mathur, Jonas Landman, Martin Strahm, and Yun Yvonna Li. "Quantum Vision Transformers." Quantum 8 (February 22, 2024): 1265. http://dx.doi.org/10.22331/q-2024-02-22-1265.

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In this work, quantum transformers are designed and analysed in detail by extending the state-of-the-art classical transformer neural network architectures known to be very performant in natural language processing and image analysis. Building upon the previous work, which uses parametrised quantum circuits for data loading and orthogonal neural layers, we introduce three types of quantum transformers for training and inference, including a quantum transformer based on compound matrices, which guarantees a theoretical advantage of the quantum attention mechanism compared to their classical cou

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Mahmoud Mohammad Hasan. "Diagnosis of Radial Deformation and Axial Displacement Faults in Power Transformer Windings using X-ray and Compton Backscatter Imaging." Journal of Electrical Systems 20, no. 3 (2024): 4457–68. http://dx.doi.org/10.52783/jes.5774.

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Continuous and uninterrupted transmission and distribution of electrical energy is highly dependent on the flawless operation of power transformers. Failure of these critical components can lead to network power interruptions and consequently have severe detrimental consequences. Therefore, timely detection and diagnosis of power transformer faults is crucial not only to prevent the escalation of faults but also to minimize repair and maintenance costs. Conventional methods for inspecting windings faults have limitations such as the need to take the transformer out of service, unreliable resul

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Granados-Lieberman, David, Jose R. Huerta-Rosales, Jose L. Gonzalez-Cordoba, Juan P. Amezquita-Sanchez, Martin Valtierra-Rodriguez, and David Camarena-Martinez. "Time-Frequency Analysis and Neural Networks for Detecting Short-Circuited Turns in Transformers in Both Transient and Steady-State Regimes Using Vibration Signals." Applied Sciences 13, no. 22 (2023): 12218. http://dx.doi.org/10.3390/app132212218.

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Transformers are vital elements in electrical networks, but they are prone to various faults throughout their service life. Among these, a winding short-circuit fault is of particular concern to researchers, as it is a crucial and vulnerable component of the transformers. Therefore, if this fault is not addressed at an early stage, it can increase costs for users and affect industrial processes as well as other electrical machines. In recent years, the analysis of vibration signals has emerged as one of the most promising solutions for detecting faults in transformers. Nonetheless, it is not a

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Yu, Fang, Kun Huang, Meng Wang, Yuan Cheng, Wei Chu, and Li Cui. "Width & Depth Pruning for Vision Transformers." Proceedings of the AAAI Conference on Artificial Intelligence 36, no. 3 (2022): 3143–51. http://dx.doi.org/10.1609/aaai.v36i3.20222.

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Transformer models have demonstrated their promising potential and achieved excellent performance on a series of computer vision tasks. However, the huge computational cost of vision transformers hinders their deployment and application to edge devices. Recent works have proposed to ﬁnd and remove the unimportant units of vision transformers. Despite achieving remarkable results, these methods take one dimension of network width into consideration and ignore network depth, which is another important dimension for pruning vision transformers. Therefore, we propose a Width & Depth Pruning (W

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Khoirudin, Sukarman Sukarman, Dodi Mulyadi, et al. "Analysis of Transformer Oil Post-Flashover: DGA Testing and Diagnostic Approached." Jurnal Teknik Mesin Mechanical Xplore 4, no. 2 (2024): 74–85. http://dx.doi.org/10.36805/jtmmx.v4i2.6093.

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Transformer oil (TO) serves as a cooling fluid and insulation medium in transformers. One cause of the decline in the quality of TO is flashover, leading to overheating of the oil inside the transformer. Flashovers, which are sudden electrical discharges in transformers, can lead to the generation of gases within the insulating oil. Understanding the changes in gas content is crucial for assessing the health and condition of the transformer. Gas analysis was conducted using the Total Dissolved Combustible Gas (TDCG), Doernenburg and Roger’s ratio method, focusing on gases extracted from both t

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Cerpinska, Marina, Renars Vitols, and Oskars Simanis. "Electromagnetic Vibrations of Hydropower Generator Stator Core and Transformer Core at 100 Hz Frequency." Solid State Phenomena 260 (July 2017): 278–88. http://dx.doi.org/10.4028/www.scientific.net/ssp.260.278.

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This paper aimed to compare obtained results and collected theory for 100 Hz frequency vibration of hydropower generator stator core and transformer core. Electromagnetic vibration with 100 Hz frequency occurred both at slow-speed salient poles synchronous generator stator core and oil-filled power transformers tank, but the nature of hydropower and transformer 100 Hz vibration was different. The vibration analysis procedure and acceptable limits for hydropower generator stator core were already covered in the standards, while the health grade system for vibration measurements of power transfo

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Shabanov, Vitalii, Albina Rakhimberdina, and Ilya Yanikiev. "ON THE ISSUE OF DETERMINING THE ELECTRICAL LOADS OF TRANSFORMER SUBSTATIONS." Electrical and data processing facilities and systems 18, no. 1 (2022): 114–22. http://dx.doi.org/10.17122/1999-5458-2022-18-1-114-122.

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Relevance The calculation of electrical loads is the basis for choosing the carrying capacity of all elements of the electrical network. An increase in rated loads compared to the necessary ones leads to cost overruns on power transmission lines and an increase in power of transformers, and a decrease in rated loads leads to increased power dissipation in networks, increased heating of conductors and transformers and increased thermal deterioration of their insulation. The reliability of the calculation of electrical loads depends both on the reliability of the calculation coefficients used an

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Tejfel, Máté, Melinda Tóth, István Bozó, Dániel Horpácsi, and Zoltán Horváth. "Improving quality of software analyser and transformer tools using specification based testing." Annales Universitatis Scientiarum Budapestinensis de Rolando Eötvös Nominatae. Sectio computatorica, no. 37 (2012): 355–68. https://doi.org/10.71352/ac.37.355.

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Reengineering tools, such as code analysers and transformers can give useful assistance during the software development process. On the other hand, the quality of these tools is crucial: improper analysis might deceive the programmer, and imprecise transformations might mess up the source code. Testing is the most commonly applied method for improving software quality. Nevertheless, in the case of analyser and transformer tools every sort of testing methods gets laborious and problematic due to the fact that both the inputs and the results of such tools are complete programs or parts of progra

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León-Martínez, Vicente, Elisa Peñalvo-López, Clara Andrada-Monrós, and Juan Ángel Sáiz-Jiménez. "Load Losses and Short-Circuit Resistances of Distribution Transformers According to IEEE Standard C57.110." Inventions 8, no. 6 (2023): 154. http://dx.doi.org/10.3390/inventions8060154.

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Load losses determine transformers’ efficiency and life, which are limited by overheating and deterioration of their elements. Since these losses can be characterized by short-circuit resistances, in this article, we have developed expressions for the short-circuit resistances of three-phase transformers according to IEEE Standard C57.110. Imposing the condition that these resistances must cause load losses of the transformer, two types of short-circuit resistance have been established: (1) the effective resistance of each phase (Rcc,z) and (2) the effective short-circuit resistance of the tra

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Li, Shuaibing, Xinchen Li, Yi Cui, and Hongwei Li. "Review of Transformer Health Index from the Perspective of Survivability and Condition Assessment." Electronics 12, no. 11 (2023): 2407. http://dx.doi.org/10.3390/electronics12112407.

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As a critical indicator for assessing the survivability and condition of transformers in a fleet, the transformer health index has attracted attention from both asset owners and international organizations like CIGRE and IEEE DEIS/PES. To provide a systematic and comprehensive review for further study or to guide transformer asset management, this paper summarizes the state-of-the-art of the transformer health index, from the early proposed weighted-score-sum approaches to the more recently proposed artificial intelligence algorithm-based methods. Firstly, different methods for determining the

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Suleiman, Abubakar Abdull, Rubiatul A. B. Zainir, Nor Asiah Muhamad, and Nouruddeen Bashir. "Comparative Study on Effect of Temperature & Moisture on Transformer Insulation Conductivity." Applied Mechanics and Materials 284-287 (January 2013): 1126–30. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1126.

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It has been acknowledged that the insulation of the power transformers is the main cause of their failures. This can easily be attributed to the fact that all power transformers connected to electrical power networks bears loads and the load causes temperature rise and degradation of the cellulose paper. The by-product of the degradation includes moisture. The high temperature and moisture combine to accelerate the rate of insulation breakdown by increasing the material conductivity, σ and also increase the aging rate of the transformer. This paper has reviewed some transformer assessments and

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Li, Zeen, Shuanghong Liu, Zhihua Fang, and Liang He. "Branch-Transformer: A Parallel Branch Architecture to Capture Local and Global Features for Language Identification." Applied Sciences 14, no. 11 (2024): 4681. http://dx.doi.org/10.3390/app14114681.

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Currently, an increasing number of people are opting to use transformer models or conformer models for language identification, achieving outstanding results. Among them, transformer models based on self-attention can only capture global information, lacking finer local details. There are also approaches that employ conformer models by concatenating convolutional neural networks and transformers to capture both local and global information. However, this static single-branch architecture is difficult to interpret and modify, and it incurs greater inference difficulty and computational costs co

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Li, Bofan, Pengning Zhang, Pengyang Li, Ze Liu, Wei Li, and Jian Zhang. "Research on Magnetic-Thermal-Force Multi-Physical Field Coupling of a High-Frequency Transformer with Different Winding Arrangements." Electronics 12, no. 24 (2023): 5008. http://dx.doi.org/10.3390/electronics12245008.

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In order to clarify the magnetic-thermal-force changing rule of high-frequency transformers under different winding arrangements, this paper tests the magnetization and loss characteristics of nanocrystalline materials at different temperatures, and based on the magnetization and loss data, establishes a magnetic-thermal-force coupling calculation model of 15 kVA, 5 kHz nanocrystalline high-frequency transformers, and calculates and analyzes the magnetic flux density, loss and temperature rise distributions of high-frequency transformers with three different winding arrangements under no-load

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Zherlitsyn, A. A., V. M. Alexeenko, and S. S. Kondratiev. "An air insulated linear pulse transformer for electrodischarge technology." Journal of Instrumentation 16, no. 12 (2021): P12006. http://dx.doi.org/10.1088/1748-0221/16/12/p12006.

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Abstract A linear pulse transformer with air insulation at atmospheric pressure was created and tested under both constant resistance and non linear loads. The maximum power of the transformer output pulse reached ∼500 MW at a matched load with a charge voltage 50 kV. The transformer transferred ∼60% of the stored energy to the load over a characteristic time of about 1 μs. The scalability the generator was studied by connecting two identical transformers in series which gave a power output of ∼850 MW with doubled output voltage and reduced current. The frequency mode of operation was studied

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Chen, Peng, Jianwei Han, Xinglong Yao, et al. "Modeling and Testing of 3D Wound Core Loss of Amorphous Alloy Transformer for Photovoltaic Inverter." Energies 18, no. 11 (2025): 2698. https://doi.org/10.3390/en18112698.

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The harmonic content of transformers used in the field of new energy is significantly higher than that of conventional transformers, leading to an abnormal increase in transformer loss during operation. Therefore, the loss characteristics of amorphous alloy transformers are investigated in this paper. First, a measurement platform for the magnetic property of transformer cores under sinusoidal excitation is developed. The magnetization characteristics, loss characteristics and loss composition of the amorphous alloy core under sinusoidal excitation are measured and analyzed. On this basis, the

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Remigius Obinna Okeke, Akan Ime Ibokette, Onuh Matthew Ijiga, Enyejo, Lawrence Anebi, Godslove Isenyo Ebiega, and Odeyemi Michael Olumubo. "THE RELIABILITY ASSESSMENT OF POWER TRANSFORMERS." Engineering Science & Technology Journal 5, no. 4 (2024): 1149–72. http://dx.doi.org/10.51594/estj.v5i4.981.

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This research investigated the assessment of power transformer reliability with emphasis on the transmission network within Rivers State in Nigeria, focusing on the perspectives of electricity consumers, organizational personnel, and business operators using descriptive survey. The study encompassed the entire population of 725,372 electricity consumers in the Port Harcourt Electricity Distribution Company (PEDC) in Rivers State, which included both households and business owners. To select a representative sample, the Convenience Sampling Technique was employed, resulting in the inclusion of

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Hanus, Oleksii, and Kostiantyn Starkov. "STUDY OF THE NATURE OF OVERVOLTAGES IN THE ELECTRICAL NETWORK ARISING FROM VOLTAGE TRANSFORMERS." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1 (2) (July 2, 2021): 28–36. http://dx.doi.org/10.20998/2224-0349.2021.01.05.

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A non-linear dynamic mathematical model of voltage transformer has been considered and overvoltages arising on the elements of voltage transformer equivalent circuit during transient processes have been investigated. The influence of voltage transformer secondary circuit capacitance on overvoltage multiplicity in the primary circuits and the duration of transients has been determined. The advantages of approximation of nonlinearity of voltage transformers by hyperbolic sine are used. Mathematical expressions determining the nature of changes in the forced and free components of the transient p

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Hao, Shuqing, Yongxiang Cai, Zhuoyue Wang, and Guanglu He. "Optimal configuration of adjustable capacity transformers considering OPF distribution." Journal of Physics: Conference Series 2896, no. 1 (2024): 012005. https://doi.org/10.1088/1742-6596/2896/1/012005.

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Abstract The configuration of adjustable capacity transformers will be affected by photovoltaic (PV) penetration. In this paper, we propose a method for optimizing the configuration of adjustable capacity transformers by analyzing the parameters and topology of the low-voltage distribution network, which considers both the operational safety of the grid and economic objectives under optimal power flow (OPF) distribution. We construct the objectives and constraints of the OPF-solving model in different PV penetration scenarios for two types of node topologies and utilize second-order cone (SOC)

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Iratni, Maya, Amira Abdullah, Mariam Aldhaheri, et al. "Transformers for Neuroimage Segmentation: Scoping Review." Journal of Medical Internet Research 27 (January 29, 2025): e57723. https://doi.org/10.2196/57723.

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Background Neuroimaging segmentation is increasingly important for diagnosing and planning treatments for neurological diseases. Manual segmentation is time-consuming, apart from being prone to human error and variability. Transformers are a promising deep learning approach for automated medical image segmentation. Objective This scoping review will synthesize current literature and assess the use of various transformer models for neuroimaging segmentation. Methods A systematic search in major databases, including Scopus, IEEE Xplore, PubMed, and ACM Digital Library, was carried out for studie

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Balci, Selami. "Thermal behavior of a three phase isolation transformer under load conditions with the finite element analysis." Thermal Science 24, no. 3 Part B (2020): 2189–201. http://dx.doi.org/10.2298/tsci190706386b.

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Transformers are generally designed to operate under the sinusoidal excitation and the method called classical design method is used in design process. Nevertheless, they have to operate under the partly or fully non-linear excitation because of the increasing amount of the non-linear loads such as rectifiers, electric motor drivers, compact fluorescent lamps, computers, etc. Non-linear loads cause abnormal temperature rise both in the core and in the windings of the transformer which are designed for sinusoidal excitation. Nowadays in the virtual environment provided by the electromagnetic de

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Arsad, Siti Rosilah, Pin Jern Ker, Md Zaini Jamaludin, et al. "Water Content in Transformer Insulation System: A Review on the Detection and Quantification Methods." Energies 16, no. 4 (2023): 1920. http://dx.doi.org/10.3390/en16041920.

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Water can be an irritant to a power transformer, as it is recognized as a major hazard to the operation of transformers. The water content of a transformer insulation system comprises the water in the transformer insulation oil and in the cellulose paper. The increase in the water content in the insulation system leads to reduced breakdown voltage, accelerated aging of the oil–paper insulation system, and the possibility of producing bubbles at high temperatures. Therefore, various techniques have been applied to measure the water content in both oil and paper insulation. This article comprehe

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Peng, Qian, Kangkang Wang, Shengnan Hu, Ziqiu Luo, Jing Zhang, and Mengna Liu. "Experimental study on the low-temperature performance of transformer oil with different trace water content." Journal of Physics: Conference Series 2351, no. 1 (2022): 012020. http://dx.doi.org/10.1088/1742-6596/2351/1/012020.

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In oil-immersed transformers, the insulation performance of transformer oil is a key factor for the normal operation of transformers. In order to explore the performance of transformer oil under different micro-water content conditions in a low-temperature environment, this paper builds a low-temperature experimental platform with a minimum temperature of -50 °C and selects the commonly used 45# oil as the test oil. Four properties including conductivity and dielectric properties were tested. The research results show that the viscosity of transformer oil increases exponentially with the decre

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