Bibliografías temáticas / Electric transformers

Literatura académica sobre el tema "Electric transformers"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 28 de julio de 2024

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Artículos de revistas sobre el tema "Electric transformers"

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Oktavianus Rikardus Waro y Aris Heriandriawan. "Analisis Umur Pakai Transformator Distribusi 800 Dan 1600 kVA Di PDAM Ngagel Surabaya". Venus: Jurnal Publikasi Rumpun Ilmu Teknik 2, n.º 2 (9 de marzo de 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 day and night. The results of data processing obtained state that the first transformer's estimated remaining life with a load > 80% is 18 years starting from 2023, the second transformer's estimated remaining life with a load > 80% is 16 years starting from 2023, for the third and fourth transformers it is not calculated because it has been used since 1982 or is around 41 years old. For the winding temperature on the first transformer LBP 84 ℃ and BP 89 ℃, on the second transformer the winding temperature LBP 81 ℃ and BP 96 ℃. Both transformers are still considered good because the hot spot temperature is below the maximum limit set by the IEEE in 1955, namely a temperature of 98 ℃.
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ÖZÜPAK, Yıldırım. "Medium Frequency Electric Field Analysis of Power Transformers in High Voltage System". BEN Vol:2 Issue:3 2021 2, n.º 3 (8 de febrero de 2021): 1–5. http://dx.doi.org/10.36937/ben.2021.003.001.

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Electronic power transformers (EPT) are transformers that are smaller in size and volume compared to conventional 50 Hz frequency transformers. Medium frequency transformers (MFT) have begun to become important components in high voltage and high power energy conversion systems such as EPTs. In this study, the electric field distribution of these transformers is discussed. The electric field distributions in the transformer have been obtained using the two-dimensional finite element method (FEM). Besides, maximum electric field intensities were obtained in the study. ANSYS@Maxwell simulation program, which realizes a solution based on FEM, was used for these analyzes. Electromagnetic field analyzes of the same transformer under normal conditions were also performed to compare the analyzes. Besides, the values obtained from the high-frequency analysis, the values obtained from the study below 50 Hz frequency, and the values obtained experimentally were compared. In this way, the stress in the insulation material of the transformer and the weak parts of the insulation material were detected. It is expected that the method used will contribute to future studies to examine the results of the electric field distribution analysis of transformers.
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Savchenko, Oleg Vladislavovich, Mihail Yur'evich Khmel, Valery Nikolaevich Polovinkin y Igor Mihaylovich Kalinin. "Ship electric propulsion systems transformers: specific aspects of development". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2024, n.º 1 (29 de febrero de 2024): 112–20. http://dx.doi.org/10.24143/2073-1574-2024-1-112-120.

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The necessity of new organizational and technical solutions in shipbuilding to ensure the quality of marine transformer transformers is substantiated. The analysis of the requirements of the Russian Maritime Register of Shipping, the current ISS for dry transformers is carried out, the experience of enterprises of related industries and foreign companies, the design features of power transformers of the ship's electric propulsion system are considered. The results of the analysis of the requirements for power transformers of marine electric propulsion systems, the features of their design and operation are presented. The main parameters of the converters in operating and emergency modes are considered and analyzed. The organizational and technical directions of ensuring increased reliability of marine converter transformers are proposed. Unlike converter transformers for land transport, there are no regulatory documents for power converter transformers in shipbuilding. The regulatory documents in force in shipbuilding do not fully take into account the specifics of marine conversion transformers. The existing main features of marine converter transformers are noted. High economic losses in the event of an accident of marine converter transformers determine higher requirements for their electrodynamic stability compared with converter transformers for land transport. In shipbuilding, there are no requirements for determining the partial short-circuit voltage and the splitting short-circuit voltage during testing of transformers necessary for the analysis of their characteristics and modes. When creating marine converter transformers, it is necessary to justify the characteristic modes of marine transformers using computer modeling, develop methods for measuring and calculating the parameters of selected modes and perform process calculations for the most likely accidents in the transformer – rectifier system. With the increase in the power of shipboard electric propulsion systems, the development of state regulatory documentation to ensure the quality of development and operation of converter transformers is becoming increasingly relevant.
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4

Xia, Lingyu, Xixiu Wu, Hui Hou, Shipu Wu, Yunbing Peng y Jiaxin Cao. "Study on the error characteristics of transformer for primary and secondary fusion used in pole-mounted switchgear". Journal of Physics: Conference Series 2757, n.º 1 (1 de mayo de 2024): 012014. http://dx.doi.org/10.1088/1742-6596/2757/1/012014.

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Abstract The fusion of primary and secondary functions refers to integrating the function of primary equipment and secondary equipment together. If doing so, the working condition of the equipment for primary and secondary fusion becomes more and more complex and bad, especially the transformer working in the smaller workspace after fusing. Therefore, this paper focuses on the transformer used in primary and secondary fusion pole-mounted Switchgear and establishes the temperature field and electric field simulation model of the primary and secondary fusion pole-mounted switchgear transformer, respectively, and the temperature rise and the environment electric field interference influencing the error of transformer are analyzed as well. When the working environment temperature ranges from -40 to 70°C, the maximum error of low-power current transformers and resistive voltage transformers is 0.1246% and 0.0371%, respectively. The electric field is one of the main factors influencing resistive voltage transformers, which makes ratio errors and angle errors -0.256% and -22.5392’, respectively. The research reveals that under conditions, the error is mainly dependent on temperature rise and electric field. These two factors have a great influence on the error, while the transformers still have enough reliability.
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Yusupov, D. T., I. K. Ismoilov, A. E. Norboev, R. X. Beytullaeva y A. A. Yuldashev. "Development of a simulation model for assessing the technical condition of oil power transformers by measuring vibroacoustic parameters". E3S Web of Conferences 510 (2024): 04014. http://dx.doi.org/10.1051/e3sconf/202451004014.

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In the electric power industry, oil-type power transformers are considered the main device that ensures reliable transmission of electric power, and their technical capabilities are analyzed. Factors affecting long-term reliable operation of oil-fired power transformers are investigated. In this paper, a simulation model is developed to assess the condition of oil power transformers during rapid diagnosis. A mathematical model has also been developed that allows calculating the absorption coefficients and the general technical condition of oil power transformers depending on the value of the input variables of oil power transformers operating in city power networks. The authors developed a Simulink model for rapid assessment of the technical condition of the oil power transformer. A block diagram is created that allows to determine the value of the technical condition of the oil power transformer according to the vibroacoustic parameters.
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Ilyas, Iriandi y Muhamad Taufan Agassy. "ANALISIS KEGAGALAN CURRENT TRANSFORMER (CT) TIPE DUA BELITAN SEKUNDER DENGAN INTI MAGNETIK TERPISAH PADA SISTEM PROTEKSI DAN PEMBATAS DAYA". SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI 32, n.º 1 (29 de marzo de 2022): 41–48. http://dx.doi.org/10.37277/stch.v32i1.1240.

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ABSTRACT Current transformers function to transform large currents into small currents used for electrical energy measurement instruments, power limitation and protection of electric power networks, current transformers have many types, the use of current transformers in actual facts such as electrical power requested by consumers to producers of electricity providers at 53 kVA to 197 kVA using a single ratio current transformer type and> 197 kVA using a secondary twisting transformer type with a separate magnetic core In this type of current transformers with different ratios have different saturation values also due to high interference current values, so they are not able to provide an accurate secondary current value according to the class and the ability of current transformers against measuring instruments, power limitation and protection of electric power networksBy analyzing the failure of these types can be a reference or reference in the use of current transformers by selecting the appropriate type, ratio and accuracy class on the electricity network
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7

Alyunov, A. N., O. S. Vyatkina, I. G. Akhmetova, R. D. Pentiuc y K. E. Sakipov. "Issues on optimization of operating modes of power transformers". E3S Web of Conferences 124 (2019): 02015. http://dx.doi.org/10.1051/e3sconf/201912402015.

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The article presents measure to optimize the operating modes of power transformers in order to minimize losses of electrical energy. The influence of actual voltage and service life of power transformers on electric power losses is shown. It was proposed to determine the economic capacity of power transformers taking into account the indicated factors, as well as taking into account the time of transformer switching on into the electric network and the form of the load schedule.
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8

Jin, Lan, Dowon Kim, Ahmed Abu-Siada y Shantanu Kumar. "Oil-Immersed Power Transformer Condition Monitoring Methodologies: A Review". Energies 15, n.º 9 (6 de mayo de 2022): 3379. http://dx.doi.org/10.3390/en15093379.

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A power transformer is one of the most critical and expensive assets in electric power systems. Failure of a power transformer would not only result in a downtime to the entire transmission and distribution networks but may also cause personnel and environmental hazards due to oil leak and fire. Hence, to enhance a transformer’s reliability and extend its lifespan, a cost-effective and reliable condition monitoring technique should be adopted from day one of its installation. This will help detect incipient faults, extend a transformer’s operational life, and avoid potential consequences. With the global trend to establish digital substation automation systems, transformer online condition monitoring has been given much attention by utilities and researchers alike. Several online and offline condition monitoring techniques have been recently proposed for oil-immersed power transformers. This paper is aimed at providing a state-of-the-art review for the various condition monitoring technologies used for oil-immersed power transformers. Concept of measurements and analysis of the results along with the future trend of condition monitoring techniques are presented.
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9

Novais, I. F., A. A. P. Junior y S. F. P. Silva. "Modeling Three-Phase Transformers". Energies and Quality Journal 1 (junio de 2019): 60–65. http://dx.doi.org/10.24084/eqj19.233.

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Transformers in electric power systems are of great importance, with significant effects on the distribution of electric energy. The modeling of this machine, considering the various usable connections, requires a more detailed analysis for better results. Thus, the objective of this work is to propose a three-phase transformer model including the neutral in the admittance matrices, the ground impedance, taps settings and also the magnetizing branch. Key words Three-phase transformers modeling, ground impedance, magnetizing branch, admittance matrix
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10

Jain, Akansha y Masoud Karimi-Ghartemani. "Mitigating Adverse Impacts of Increased Electric Vehicle Charging on Distribution Transformers". Energies 15, n.º 23 (29 de noviembre de 2022): 9023. http://dx.doi.org/10.3390/en15239023.

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As the world is transitioning to electric vehicles (EVs), the existing power grids are facing several challenges. In particular, the additional charging power demand may repeatedly overload the traditionally-sized distribution transformers and adversely impact their operational life. To address this challenge, this paper proposes an EV-based reactive power compensation strategy for transformer overloading mitigation. Specifically, a low-bandwidth centralized recursive controller is proposed to determine a set point for the EV’s onboard charger’s reactive power. Importantly, the proposed strategy is practically implementable in existing distribution grids as it does not rely on smart grid infrastructure and is stable under potential communication delays and partial failures. This paper discusses the controller’s structure, design, and stability in detail. The proposed solution is tested with a realistic secondary distribution system considering four different EV charging scenarios with both Level 1 and Level 2 residential EV charging. Specifically, IEEE Standard C57.91-2011 is used to quantify the impact of EV charging on the transformer’s life. It is shown that with the proposed method, transformer overloading is significantly reduced, and the transformer’s life improves by an average of 47% over a year in all four scenarios.
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Tesis sobre el tema "Electric transformers"

1

Siebrits, F. B. (Francois Bart). "Field implementation of a transient voltage measurement facility using HV current transformers". Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53426.

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Thesis (MScEng)--University of Stellenbosch, 2003.
ENGLISH ABSTRACT: The bandwidth of standard HV measurement devices such as capacitive voltage transformers is too limited in order to measure wideband phenomena. This thesis is concerned with the investigation into a non- intrusive HV transient voltage measurement facility using standard substation HV current transformers (CI's) configured in a transconductance topology. The sensing, summation and integration of the CT capacitive earth currents are investigated. This thesis also reports on the development of a optically isolated link using optical fibre for signal transfer and a computer based data acquisition system.
AFRIKAANSE OPSOMMING: Standaard hoogspannings (HS) meettoerusting soos kapasitiewe spannmgs transformators het beperkte bandwydte vir die meet van wyeband verskynsels. Hierdie tesis handel oor die implementering van 'n HS meetstelsel wat op meinbrekende wyse oorgangsverskynsels meet deur middel van HS stroomtransformators wat in 'n transkonduktansie topologie gekonfigureer is. Die meet, sommasie en integrasie van kapasitoewe grondstrome word ondersoek. Hierdie tesis doen ook verslag aangaande die ontwikkeling van 'n optiese geisoleerde koppelvlak wat gebruik word vir seinoordrag en 'n rekenaar gebasseerde data versamelaar.
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Bell, Simon Colin. "High-voltage partial-core resonant transformers". Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/2161.

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This thesis first describes the reverse method of transformer design. An existing magnetic model for full-core shell-type transformers, based on circuit theory, is summarised. A magneto-static finite element model is introduced and two sample transformers are analysed. The magnetic model based on finite element analysis is shown to be more accurate than the model based on circuit theory. Partial-core resonant transformers are then introduced and their characteristics are explained using an equivalent circuit model. A method of measuring the winding inductances under resonant operation is developed and used to investigate the characteristics of two different tuning methods. A finite element model of the partial-core resonant transformer is developed by adopting the model for full-core shell-type transformers. The model results accurately match the measured inductance variation characteristics of three sample transformers and predict the onset of core saturation in both axial-offset and centre-gap arrangements. A new design of partial-core resonant transformer is arrived at, having an alternative core and winding layout, as well as multiple winding taps. The finite element model is extended to accommodate the new design and a framework of analysis tools is developed. A general design methodology for partial-core resonant transformers with fixed inductance is developed. A multiple design method is applied to obtain an optimal design for a given set of specifications and restrictions. The design methodology is then extended to devices with variable inductance. Three design examples of partial-core resonant transformers with variable inductance are presented. In the first two design examples, existing devices are replaced. The new transformer designs are significantly lighter and the saturation effects are removed. The third design example is a kitset for high-voltage testing, with the capability to test any hydro-generator stator in New Zealand. The kitset is built and tested in the laboratory, demonstrating design capability. Other significant test results, for which no models have yet been developed, are also presented. Heating effects in the core are reduced by adopting an alternative core construction method, where the laminations are stacked radially, rather than in the usual parallel direction. The new kitset is yet to be used in the field.
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Obatoyinbo, Ade. "Development of multi-layer on-package microwave baluns". Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/13557.

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Jessee, J. Patrick. "A coupled thermal-magnetic finite element model for high frequency transformers". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-12172008-063409/.

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Minteer, Timothy Michael. "Design of a new transformer isolated analog acquisition system having greatly reduced transformer size and weight while achieving high accuracy". Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Spring2008/t_minteer_041308.pdf.

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Robalino, Vanegas Diego M. "Loss of life of medium voltage oil-immersed current transformers under thermal accelerated ageing a dissertation presented to the faculty of the Graduate School, Tennessee Technological University /". Click to access online, 2009. http://proquest.umi.com/pqdweb?index=0&did=1934058311&SrchMode=1&sid=2&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1264684717&clientId=28564.

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Lu, Shu. "Power transformer magnetization under GIC/GMD". Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09232008-144706/.

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Wacharasindhu, Tongtawee. "Fuse holder damage investigation". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4599.

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Thesis (M.S.) University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 29, 2007) Includes bibliographical references.
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9

Baningobera, Bwandakassy Elenga. "The IEC 61850 standard-based protection scheme for power transformers". Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2713.

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Thesis (Master of Engineering in Electrical Engineering))--Cape Peninsula University of Technology, 2018.
Transformer Differential and overcurrent schemes are traditionally used as main and backup protection respectively. The differential protection relay (SEL487E) has dedicated harmonic restraint function which blocks the relay during the transformer magnetizing inrush conditions. However, the backup overcurrent relay (SEL751A) applied to the transformer protection does not have a harmonic restraint element and trips the overcurrent relay during the inrush conditions. Therefore, to prevent the malfunction caused by the transformer magnetizing inrush current, a novel harmonic blocking method is developed, implemented and tested in the RSCAD simulation environment. The IEEE 14 bus transmission system is considered as a case study. The IEEE 14 bus system is modelled and simulated in the DIgSILENT and RSCAD simulation environments respectively. The developed harmonic blocking scheme is implemented in the Hardware-In-the-Loop (HIL) simulation environment using Real-Time Digital Simulator and numerical protection IEDs. The developed scheme uses the Harmonic Blocking element (87HB) of the transformer differential relay (SEL487E) to send an IEC61850 GOOSE-based harmonic blocking signal to the backup overcurrent relay (SEL751A) to inhibit it from tripping during the transformer magnetizing inrush current conditions. The hardwired and GOOSE simulation results are analysed for the transformer differential protection and the backup overcurrent protection schemes for internal, external events and transformer magnetizing inrush current conditions. The simulation results proved that the IEC61850 standard-based protection scheme is faster than the hardwired. Therefore, the speed and reliability are improved using the IEC61850 standard-based GOOSE applications to the transformer digital protective relaying system.
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10

Habibi, Saeid. "Wireless charging of electric vehicles based on resonant inductive power transformers". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Abstract Electric vehicles and their charging stations are among important applications in today's world. The E-mobility industry is changing day-to-day with new ways to reduce charging time of electric vehicles, ease of use in charging process, increasing the efficiency and sometimes remote control access of the charging system. To accomplish this, resonant inductive power transfers is one of the method that can be hired to transfer power to electric vehicles (EVs) over an air-gap and can remarkably improve the range, safety and convenience of the EV battery charging. However, implementation of a large scale wireless charging infrastructure of electric vehicles (e.g. for taxi fleet in a city) is still one of the major difficulties of such technology. Issues related to determining the physical sizes of the coil pads, standardization, technical interoperability, safety and designing the appropriate wireless charging system to be used for different EVs are among those difficulties. The important target of doing this study is to understand the feasibility of installation of wireless charging stations for electric vehicle in terms of technical and financial issues, and understanding that which size of chargers are needed to install for electric vehicles. Electrical synchronization and interoperability of primary and secondary coils are other issues investigated. In the following chapters, financial and economic analysis of implementation of the wireless charging infrastructure for the taxi and van fleet in an urban area are discussed. It can be concluded that implementation of wireless charging infrastructure for electric vehicles in urban areas for taxi fleet and delivery van drivers could bring many advantages because of specific working routine and stop time that they have during each working day. Increment of anxiety range, and reduction of charging time, convenience, being needless of tedious conventional charging cables, saving money are major advantages.
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Libros sobre el tema "Electric transformers"

1

Dasgupta, Indrajit. Power transformers quality assurance. New Delhi: New Age International (P) Ltd., Publishers, 2009.

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2

Kosow, Irving I. Electric machinery and transformers. 2a ed. Englewood Cliffs, N.J: Prentice Hall, 1991.

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3

Guru, Bhag S. Electric machinery and transformers. San Diego: Harcourt Brace Jovanovich, Technology Publications, 1988.

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4

Anderson, Leonard R. Electric machines and transformers. 2a ed. Englewood Cliffs, N.J: Prentice Hall, 1988.

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Guru, Bhag S. Electric machinery and transformers. 2a ed. New York: Oxford Univ. Press, 1995.

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6

R, Hiziroǧlu Hüseyin, ed. Electric machinery and transformers. 3a ed. New York: Oxford University Press, 2001.

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R, Hızıroğlu Hüseyin, ed. Electric machinery and transformers. 2a ed. Fort Worth: Saunders College Pub., 1995.

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R, Hızıroğlu Hüseyin y Knovel (Firm), eds. Electric machinery and transformers. 3a ed. New York: Oxford University Press, 2001.

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1949-, MacNeill Jack, ed. Electric machines and transformers. 2a ed. Englewood Cliffs: Prentice-Hall International, 1988.

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H, Harlow James, ed. Electric power transformer engineering. 2a ed. Boca Raton, Fla: CRC Press, 2007.

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Capítulos de libros sobre el tema "Electric transformers"

1

Boldea, Ion y Lucia N. Tutelea. "Electric Transformers". En Electric Machines, 27–110. 2a ed. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003214519-2.

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Ali, Warsame Hassan, Samir Ibrahim Abood y Matthew N. O. Sadiku. "Transformers". En Fundamentals of Electric Machines, 65–92. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor &: CRC Press, 2019. http://dx.doi.org/10.1201/9780429290619-4.

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Bigelow, Timothy A. "Transformers". En Electric Circuits, Systems, and Motors, 315–43. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-31355-5_10.

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Rahmani-Andebili, Mehdi. "Problems: Transformers". En AC Electric Machines, 1–9. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15139-2_1.

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Zeng, Gengsheng Lawrence y Megan Zeng. "Mutual Inductance and Transformers". En Electric Circuits, 149–56. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60515-5_21.

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Rahmani-Andebili, Mehdi. "Solutions of Problems: Transformers". En AC Electric Machines, 11–45. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15139-2_2.

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Asadi, Farzin. "Magnetic Coupling and Transformers". En Electric Circuits Laboratory Manual, 133–40. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-24552-7_7.

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Jo, Jangwu, Junhyun Park, Youngsu Chon, Ayoung Jang y Byeongdo Kang. "Software Approaches for Designing Electric Transformers". En Computer and Information Science and Engineering, 33–46. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-57037-7_3.

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Midgley, G. W., D. Howe y P. H. Mellor. "Improved Linearity Linear Variable Differential Transformers (LVDTs) Through the Use of Alternative Magnetic Materials". En Electric and Magnetic Fields, 311–14. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1961-4_71.

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Tretyakov, E. A. y V. T. Cheremsin. "Control of Idle Losses in Power Transformers of Distribution Electric Networks". En VIII International Scientific Siberian Transport Forum, 855–63. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37916-2_84.

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Actas de conferencias sobre el tema "Electric transformers"

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Jo, Jangwu, Junhyun Park, AYoung Jang, Youngsu Chon y Byeongdo Kang. "Another Software for Designing Electric Transformers". En 2023 IEEE/ACIS 21st International Conference on Software Engineering Research, Management and Applications (SERA). IEEE, 2023. http://dx.doi.org/10.1109/sera57763.2023.10197812.

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Zambrano, E. y C. Gaytan. "Efficiency and losses evaluation in electric transformers". En 2015 IEEE Thirty-Fifth Central American and Panama Convention (CONCAPAN XXXV). IEEE, 2015. http://dx.doi.org/10.1109/concapan.2015.7428493.

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Dugan, Roger C., Charles W. Williams y Harish Sharma. "Low-Side Surges in Distribution Transformers". En 2007 IEEE Rural Electric Power Conference. IEEE, 2007. http://dx.doi.org/10.1109/repcon.2007.369558.

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Burkov, A. F. y V. K. Nguen. "Review and analysis methods of switching electrical circuit of alternating current of electric drivers". En Science of Russia: Goals and objectives. Science of Russia: Goals and objectives, 2023. http://dx.doi.org/10.18411/nrciz-02-2023-17.

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Currently, alternating current (AC) is widely used in technology, as it is easily transformed and transmitted over long distances at high voltage and low losses. In addition, electrical machines and other electrical devices designed to operate in AC circuits are relatively simple and fairly reliable in operation. AC is used in various fields of electrical engineering (electric drive, electrothermal, telecommunications, radio engineering, etc.). Turning on, off, switching, short circuits, changing the direction of current, everything that causes a change in the flow of energy, is a transient process, which is usually characterized by the term "switching". Switching of electrical circuits is called a variety of switching made in all kinds of electrical connections, as well as in cables, wires, transformers, machines, various devices and apparatuses that, in one way or another, generate, distribute and consume electricity. As a rule, switching is accompanied by transient processes that occur as a result of the fact that currents and voltages are very quickly redistributed in the branches of electrical circuits.
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Cano-Plata, E. A., O. J. Soto-Marin y A. J. Ustariz-Farfan. "Validation and reception of electric arc furnace transformers". En 2016 IEEE Industry Applications Society Annual Meeting. IEEE, 2016. http://dx.doi.org/10.1109/ias.2016.7731903.

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Saad, Saad M., Abdelsalam Elhaffar y Khalil El-Arroudi. "Optimizing differential protection settings for power transformers". En 2015 Modern Electric Power Systems (MEPS). IEEE, 2015. http://dx.doi.org/10.1109/meps.2015.7477186.

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Dawande, S. y K. Lentijo. "Multi-megawatt drive with intercell transformers". En 2013 IEEE Electric Ship Technologies Symposium (ESTS 2013). IEEE, 2013. http://dx.doi.org/10.1109/ests.2013.6523737.

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Solak, Krzysztof, Waldemar Rebizant y Ludwig Schiel. "Differential protection of converter transformers". En 2016 17th International Scientific Conference on Electric Power Engineering (EPE). IEEE, 2016. http://dx.doi.org/10.1109/epe.2016.7521804.

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Manusov, V. Z., N. V. Alexandrov y B. V. Lukutin. "Impact of superconducting transformers on electric power system stability". En 2013 13th International Conference on Environment and Electrical Engineering (EEEIC). IEEE, 2013. http://dx.doi.org/10.1109/eeeic-2.2013.6737875.

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Weiping, Ma, Cheng Fangxiao, Sun Ying, Xie Chungui y Ao Ming. "Fault Diagnosis On Power Transformers Using Non-electric Method". En 2006 International Conference on Power System Technology. IEEE, 2006. http://dx.doi.org/10.1109/icpst.2006.321558.

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Informes sobre el tema "Electric transformers"

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Nguyen, Ruby, Mike Severson, Bo Zhang, Bjorn Vaagensmith, Md Rahman, Ange-Lionel Toba, Paige Price, Ryan Davis y Sophie Williams. Electric Grid Supply Chain Review: Large Power Transformers and High Voltage Direct Current Systems. Office of Scientific and Technical Information (OSTI), febrero de 2022. http://dx.doi.org/10.2172/1871501.

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Unzeta, Bruno Bueno, Jan de Boer, Ruben Delvaeye, Bertrand Deroisy, Marc Fontoynont, Daniel Neves Pimenta, Per Reinhold, Sophie Stoffer y Robert Weitlaner. Review of lighting and daylighting control systems. IEA SHC Task 61, febrero de 2021. http://dx.doi.org/10.18777/ieashc-task61-2021-0003.

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There is a large number of control systems proposed either by lighting manufacturers or motor manufacturers for shading systems. In addition there are many other solutions proposed by specific manufacturers of Building Management Systems (BMS) or manufacturers of components to be installed in luminaires and switches, as well as in the electric lighting architecture (transformers, gateways to the internet, sensors, etc.). For many consumers -i.e.-the installer, the facility manager, or the final user (building occupant) – this forms a complex and dynamic market environment with high frequent changes, every year or even every month or day. In this report we aim to provide some basic strategic information, showing the status of the supply at the time this report was written (2019-2021). Although the market develops very fast, there are principles of controls which are rather independent of the progress of technology.
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Clem, Paul, Ellie Wang y Joseph Kotulski. EMP-Resilient Electric Grid Transformer Analysis. Office of Scientific and Technical Information (OSTI), octubre de 2020. http://dx.doi.org/10.2172/1684647.

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Radhakrishnan, B., H. Buswell y M. Ferringer. Electrical Core Transformer Using Wire Magnetic Components. Office of Scientific and Technical Information (OSTI), junio de 2010. http://dx.doi.org/10.2172/983004.

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Tow Leong, Tiang, Mohd Saufi Ahmad, Ang Qian Yee, Syahrun Nizam Md Arshad@Hashim, Mohd Faizal Mohd Zahir, Mohd Azlizan Moh Adib, Nazril Husny, Tan Kheng Kwang y Dahaman Ishak. HANDBOOK OF ELECTRICAL SYSTEM DESIGN FOR NON-DOMESTIC BUILDING. Penerbit Universiti Malaysia Perlis, 2023. http://dx.doi.org/10.58915/techrpt2023.001.

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This technical report presents the electrical system installation design for development of a factory with 1 storey and 2 storey of offices. Firstly, the general methodology of designing the electrical system are elaborated in this report. As overall, the methodologies in designing the components of the electrical system are explained and elaborated, which included: (a) load and maximum demand estimation; (b) miniature circuit breaker (MCB) selection; (c) moulded case circuit breaker (MCCB) selection; (d) air circuit breaker (ACB) selection, (e) residual current device (RCD) selection; (f) protection relay selection; (g) current transformer (CT) selection; (h) sizing selection for cable and live conductors; (i) capacitor bank selection for power factor correction (PFC); and (j) distribution transformer and its protection devices selection. Then, the electrical system of this project is computed and designed by using the methodologies aforementioned. Firstly, the electrical system of various distribution boards (DBs) with the protection/metering devices along with its phase and earthing cables for every final circuits are designed and installed in the factory. Next, the installation is proceeded with the electrical system of main switchboard (MSB) with the protection/metering devices along with its phase and earthing cables for every DBs. Also, the electrical system of PFC by using detuned capacitor bank with various protection/metering devices is designed and built in the plant. Apart from that, the factory is equipped with the electrical system of high tension (HT) room that included the distribution power transformer with the protection/metering devices along with its phase and earthing cables. Lastly, the methodologies and the computation design of the electrical system installation in the context of connected load, load currents, maximum demand, MCB, MCCB, ACB, RCD, protection relay, metering CTs, live cable, protection conductor/earth cable, detuned capacitor bank, and distribution transformer, are prepared according to several important standards, for instance, the MS IEC 60364, Electrical Installations for Buildings, Suruhanjaya Tenaga (ST) – Non-Domestic Electrical Installation Safety Code, Electricity Supply Application Handbook, Tenaga Nasional Berhad (TNB).
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Harrie R. Buswell, PhD, PhD Dennis Jacobs y Steve Meng. Electrical Core Transformer for Grid Improvement Incorporating Wire Magnetic Components. Office of Scientific and Technical Information (OSTI), marzo de 2012. http://dx.doi.org/10.2172/1036998.

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Hansen, Clifford, Thomas Catanach, Austin Glover, Jose Huerta, Zach Stuart y Ross Guttromson. Modeling Failure of Electrical Transformers due to Effects of a HEMP Event. Office of Scientific and Technical Information (OSTI), julio de 2020. http://dx.doi.org/10.2172/1644736.

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Clendenin, James E. A Polarized Electron RF Photoinjector Using the Plane-Wave-Transformer (PWT) Design. Office of Scientific and Technical Information (OSTI), agosto de 2001. http://dx.doi.org/10.2172/799030.

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Cutler, Dylan S., Willy G. Bernal Heredia y Jesse D. Dean. Case Study: Laboratory and Field Evaluation of Circuit-Level Electrical Submetering with Wireless Current Transformers. Office of Scientific and Technical Information (OSTI), junio de 2019. http://dx.doi.org/10.2172/1530174.

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McBride, S. PCB (polychlorinated biphenyl) sampling of transformers and electrical devices at Norfolk Naval Base, Norfolk, Virginia. Office of Scientific and Technical Information (OSTI), marzo de 1990. http://dx.doi.org/10.2172/7227477.

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