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Journal articles on the topic 'Step-up transformer'

Author: Grafiati

Published: 30 June 2021

Last updated: 8 February 2022

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1

Lee, Ockgoo, Kyu Hwan An, Chang-Ho Lee, and Joy Laskar. "A Parallel-Segmented Monolithic Step-Up Transformer." IEEE Microwave and Wireless Components Letters 21, no. 9 (September 2011): 468–70. http://dx.doi.org/10.1109/lmwc.2011.2161976.

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2

Susa, D., K. B. Liland, L. Lundgaard, and G. Vårdal. "Generator step-up transformer post mortem assessment." European Transactions on Electrical Power 21, no. 5 (December 29, 2010): 1802–22. http://dx.doi.org/10.1002/etep.544.

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3

Sharma, R. Rajesh. "Design of Distribution Transformer Health Management System using IoT Sensors." September 2021 3, no. 3 (September 16, 2021): 192–204. http://dx.doi.org/10.36548/jscp.2021.3.005.

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Transformers are one of the primary device required for an AC (Alternating Current) distribution system which works on the principle of mutual induction without any rotating parts. There are two types of transformers are utilized in the distribution systems namely step up transformer and step down transformer. The step up transformers are need to be placed at some regular distances for reducing the line losses happening over the electrical transmission systems. Similarly the step down transformers are placed near to the destinations for regulating the electricity power for the commercial usage. Certain regular check-ups are must for a distribution transformer for increasing its operational life time. The proposed work is designed to regularize such health check-ups using IoT sensors for making a centralized remote monitoring system.

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4

Nguyen, The Vinh, Thanh Vinh Vo, Pierre Petit, Michel Aillerie, and Ngoc Thang Pham. "Optimized pulse transformer for step-up DC-DC converter." Energy Procedia 119 (July 2017): 930–37. http://dx.doi.org/10.1016/j.egypro.2017.07.126.

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5

Shin, Hoonbum, Varakorn Kasemsuwan, Hyungkeun Ahn, M. El Nokali, and Deuk-Young Han. "Electrical analysis of step-up multi-layered piezoelectric transformer." Journal of Electroceramics 17, no. 2-4 (December 2006): 585–90. http://dx.doi.org/10.1007/s10832-006-0471-3.

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6

Sarajcev, Petar, Antun Meglic, and Ranko Goic. "Lightning Overvoltage Protection of Step-Up Transformer Inside a Nacelle of Onshore New-Generation Wind Turbines." Energies 14, no. 2 (January 8, 2021): 322. http://dx.doi.org/10.3390/en14020322.

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This paper presents an electromagnetic transient analysis of lightning-initiated overvoltage stresses of the step-up transformers installed inside a nacelle of onshore, multi-megawatt, new-generation wind turbines. The increase in the wind turbine (WT) nominal power output, necessitated introducing the step-up transformer into the nacelle. A transformer installed inside a nacelle is subjected to completely different overvoltage stresses from those present if it were installed at the base of the WT tower. This has serious repercussions on its overvoltage protection (i.e., selection and installation of surge arresters) and insulation coordination. Furthermore, the overvoltage protection of medium-voltage cables (inside the tower) is also problematic when considering their length, proximity to the tower wall, and their screen grounding practices, and needs to be tackled in conjunction with that of the step-up transformer. This paper presents detailed models for the various components of the latest-generation WTs, intended for fast-front transient analysis and assembled within the EMTP software package. We further present the comprehensive results of the lightning-transient numerical simulations, covering both upward and downward (first and subsequent) strikes, their analysis, and recommendations for the optimal selection of medium-voltage surge arresters for the step-up transformers installed inside a nacelle.

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7

Sarajcev, Petar, Antun Meglic, and Ranko Goic. "Lightning Overvoltage Protection of Step-Up Transformer Inside a Nacelle of Onshore New-Generation Wind Turbines." Energies 14, no. 2 (January 8, 2021): 322. http://dx.doi.org/10.3390/en14020322.

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This paper presents an electromagnetic transient analysis of lightning-initiated overvoltage stresses of the step-up transformers installed inside a nacelle of onshore, multi-megawatt, new-generation wind turbines. The increase in the wind turbine (WT) nominal power output, necessitated introducing the step-up transformer into the nacelle. A transformer installed inside a nacelle is subjected to completely different overvoltage stresses from those present if it were installed at the base of the WT tower. This has serious repercussions on its overvoltage protection (i.e., selection and installation of surge arresters) and insulation coordination. Furthermore, the overvoltage protection of medium-voltage cables (inside the tower) is also problematic when considering their length, proximity to the tower wall, and their screen grounding practices, and needs to be tackled in conjunction with that of the step-up transformer. This paper presents detailed models for the various components of the latest-generation WTs, intended for fast-front transient analysis and assembled within the EMTP software package. We further present the comprehensive results of the lightning-transient numerical simulations, covering both upward and downward (first and subsequent) strikes, their analysis, and recommendations for the optimal selection of medium-voltage surge arresters for the step-up transformers installed inside a nacelle.

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8

Mrvic, Jovan, Petar Vukelja, and Ninoslav Simic. "Generator step up transformer overvoltage protection in EPS power plants." Zbornik radova, Elektrotehnicki institut Nikola Tesla, no. 25 (2015): 87–96. http://dx.doi.org/10.5937/zeint25-9168.

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9

Yoppy, Yoppy, Mohamad Khoirul Anam, Yudhistira Yudhistira, Priyo Wibowo, Harry Arjadi, Hutomo Wahyu Nugroho, and Haryo Dwi Prananto. "Analysis of Step Up Transformer for Pulsed Electric Fields Generator." Indonesian Journal of Electrical Engineering and Computer Science 3, no. 1 (July 1, 2016): 59. http://dx.doi.org/10.11591/ijeecs.v3.i1.pp59-66.

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<em><span>Pulsed electric fields (PEF) is a novel non-thermal food processing whose purpose is</span><span lang="EN-US"> </span><span>inactivating microbes while at the same time preserving food’s nutrition, color, and taste. This paper presents an analysis of step up transormer for PEF high voltage generator. To achieve the optimum PEF effects, the pulse shape should resemble a square, which is characterized by low voltage drop and fast rising time. Through simulations, it has been shown that higher transformer inductance results in lower voltage drop. However at some points, further increasing the inductance would only produces negligible improvements. Meanwhile fast rising time can be achieved by minimizing leakage inductance and parasitic capacitance. Moreover, maximum energy transfer to the load can be obtained by reducing winding resistances. Finally, a case of high voltage generator using ignition coil has been evaluated. Due to its high winding resistances, ignition coil seems to be not suitable for PEF applications.</span></em>

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10

Xiong, Ze Cheng, Qiang Yin, Zhi Jun Luo, and Hao Pang. "Step-Up DC/DC Transformer Based on LLC Resonant Full Bridge." Applied Mechanics and Materials 734 (February 2015): 864–67. http://dx.doi.org/10.4028/www.scientific.net/amm.734.864.

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In view of the LLC series resonant converter topology, it is well known as suitable for small and medium power application, the stabilization of output voltage and the environment of step-dowm. The scheme is proposed for a kind of the step-up DC/DC transformer based on LLC resonant full bridge. The detailed design method is given. The 3KW prototype is built. The experimental results show it has the characteristics of the constant current discharge, wide working frequency and high power desity, as well, the feasibility is verified.

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11

Tsuneoka, Masaki, Nobuyoshi Nakayama, Toshio Asaka, and Toshimitsu Iiyama. "Development of high frequency step-up transformer for DC-DC converter." IEEJ Transactions on Industry Applications 119, no. 11 (1999): 1424–25. http://dx.doi.org/10.1541/ieejias.119.1424.

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12

Pasternack, B. M., J. H. Provanzana, and L. B. Wagenar. "Analysis of a generator step-up transformer failure following faulty synchronization." IEEE Transactions on Power Delivery 3, no. 3 (July 1988): 1051–58. http://dx.doi.org/10.1109/61.193886.

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13

Lü, Li, YangYang Guo, JianPing Zhou, Pan Wang, Peng Liu, and XiaoMing Chen. "Adjusting the voltage step-up ratio of a magnetoelectric composite transformer." Chinese Science Bulletin 56, no. 7 (March 2011): 700–703. http://dx.doi.org/10.1007/s11434-010-4083-6.

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14

Saputra, Andre, and Fadli Eka Yandra. "Rancang Bangun Inverter Menggunakan IC CD4047 INPUT Batrai 12 VDC Ke Output Lampu 220 VAC Frekuensi 50-60 HZ." Journal of Electrical Power Control and Automation (JEPCA) 2, no. 1 (July 3, 2020): 1. http://dx.doi.org/10.33087/jepca.v2i1.22.

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Inverter is an electronic device that functions to change current direct (DC) into alternating current (AC) with the magnitude of the voltage and frequency can be adjusted, the output of an inverter in the form of AC voltage in the form of a square wave. Then testing with different types of Step Up CT transformers to get the test results and analysis. And the working principle of this inverter circuit is that the TIP122 and 2N3055 Transistor driver pulses are generated by the IC CD4047 pulse generator, the pulses of the Astambil Multivibrator circuit are 2 pulses with a phase that reverses 180º. The Q and Q pulses are used to provide drivers to the TIP122 and 2N3055 transistors and will induce the Step Up Transformer in turn. So the Step Up Transformer will be able to induce in 2 directions from the CT point. because of the induction process, the transformer primary will provide an AC voltage of 220 volts with a square wave shape. This type of inverter can only be used for lamps, the price is cheaper because it is used to back up the lamp.

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15

Nugroho, Setyo Adi, and Setyo Aji Priambodo. "Breakdown Voltage Characteristic Of Mineral Oil In Power Transformer 16 Mva Updl Semarang." Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto) 21, no. 2 (November 17, 2020): 119. http://dx.doi.org/10.30595/techno.v21i2.7957.

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The transformer is one of the most important equipment in the electric power system, which is to distribute power from power plants to the load centers by step-up or step down the voltage. Transformer is expect to have a high level of reliability. One of the causes of damage to the power transformer is its insulation system. Mineral oil is an insulator that is widely used in power transformers. One of the important parameters in oil type insulation is the breakdown voltage value, the greater breakdown voltage value, as better the insulation quality. In this research, a breakdown voltage test is carried out on a Shell Diala B transformer oil type regarding the IEC 60156-95 standard. The results showed a breakdown voltage in the power transformer oil at UPDL Semarang of 49.2 kV. These results have met the feasibility standard of transformer oil, based on the IEC standard the value of breakdown voltage of liquid type insulation is 30 kV.

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16

Cho, Man-Young, Ho-Jeon Shin, Jae-Sun Huh, and Jae-Chul Kim. "Analysis of Transient Voltage by Lightning Stroke at 345kV Step-up Transformer." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 26, no. 10 (October 31, 2012): 95–101. http://dx.doi.org/10.5207/jieie.2012.26.10.095.

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17

Thango, Bonginkosi A., Jacobus A. Jordaan, and Agha F. Nnachi. "Selection and Rating of the Step-up Transformer for Renewable Energy Application." SAIEE Africa Research Journal 111, no. 2 (June 2020): 50–55. http://dx.doi.org/10.23919/saiee.2020.9099492.

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18

Li, W., W. Li, and X. He. "Zero-voltage transition interleaved high step-up converter with built-in transformer." IET Power Electronics 4, no. 5 (2011): 523. http://dx.doi.org/10.1049/iet-pel.2010.0133.

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19

Morched, A. S., L. Marti, R. H. Brierley, and J. G. Lackey. "Analysis of internal winding stresses in EHV generator step-up transformer failures." IEEE Transactions on Power Delivery 11, no. 2 (April 1996): 888–94. http://dx.doi.org/10.1109/61.489348.

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20

Gao, Shanshan, Yijie Wang, Yueshi Guan, and Dianguo Xu. "A High Step Up SEPIC-Based Converter Based on Partly Interleaved Transformer." IEEE Transactions on Industrial Electronics 67, no. 2 (February 2020): 1455–65. http://dx.doi.org/10.1109/tie.2019.2910044.

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21

Chen, Xiaoqiang, Tao Chen, and Ying Wang. "Investigation on Design of Novel Step-Up 18-Pulse Auto-Transformer Rectifier." IEEE Access 9 (2021): 110639–47. http://dx.doi.org/10.1109/access.2021.3103584.

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22

Hidayat, Darmawan, Nendi Suhendi Syafei, Bambang Mukti Wibawa, and Bernard Y. Tumbelaka. "Fabrikasi Transformator Step-up 1-kV Fasa Tunggal untuk Generator Pemicu Transduser Ultrasonik." Jurnal Teknologi Rekayasa 3, no. 1 (June 20, 2018): 11. http://dx.doi.org/10.31544/jtera.v3.i1.2018.11-16.

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Generator pulsa tegangan tinggi diperlukan untuk memicu transduser ultrasonik dalam proses pembangkitan gelombang ultrasonik. Salah satu komponen sumber daya generator pulsa ini adalah tegangan tinggi searah (DC) orde 1 kV. Makalah ini melaporkan desain dan fabrikasi tegangan tinggi DC melalui transformator step-up inti besi fasa tunggal 0,5 mA dengan tegangan punak-puncak sinusoida sekunder hingga 1 kV 50 Hz. Masukan primer adalah jala-jala 220 VAC dengan variasi tegangan AC terminal sekunder 100, 200, 400, 600, 800 dan 1000 V. Sebuah dioda jembatan penyearah digunakan untuk penyearahan penuh tegangan AC sekunder menjadi DC. Kinerja transformator meliputi rasio dan linearitas penguatan tegangan, tanggapan frekuensi, dan analisis pembebanan. Hasil pengujian menunjukkan amplitudo tegangan sekunder meningkat linear seiring kenaikan tegangan sekunder dengan tegangan sekunder maksimum adalah 1220 V untuk masukan primer 220 VAC. Hasil penyearahan menunjukkan penyearahan penuh dengan ripple kurang dari 1%. Berdasarkan hasil seluruh pengujian, transformator dapat mencatu tegangan tinggi yang diperlukan hingga ~1 kV dengan daya maksimum sekitar 400 Watt memenuhi kriteria untuk mencatu generator pulsa tegangan tinggi.Kata kunci: tegangan tinggi, transformator, arus searah, step-upA short-time-width high-voltage pulse generator is necessary for the generation of ultrasonic waves in the purposes of various material evaluations and physical quantity measurements. This necessitates a DC high voltage power supply in the order of hundreds of volts. This work reports a design and fabrication of an iron-cored single phase 0.5 mA step-up transformer which provided secondary output voltage up to 1 kV with a 50-Hz sinusoid primary working voltage of 220 VAC. An integrated bridge diode fully rectified the secondary voltage waveforms into an unrectified DC voltage. Transformer performance including the step-up ratio and gain, frequency response and load analysis were evaluated. The test results showed secondary maximum voltage of 1220 V for 220 VAC primary input, which secondary voltages proportionally increased with the increasing of primary voltage. The evaluated transformer parameters included ratio and linearity of voltage gain, frequency response and loading analysis. The frequency response analysis exhibited that the transformer working frequency was 50 Hz. In conclusion, the designed transformer were able to provide up to 1 kV DC voltage with maximum power of 400 W. This was sufficiently adequate to provide DC high voltage for the ultrasonic transducer pulse circuit.Keywords: high voltage, transformer, DC voltage, step-up

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23

Adegbile, A. A. "Design And Construction Of Alternating And Direct Current Operated Electroejaculator For Animal Breeders." Nigerian Journal of Animal Production 20 (January 5, 2021): 32–43. http://dx.doi.org/10.51791/njap.v20i.2099.

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The supply of voltage is obtained by using a transistorised converter. It is designed to give a square wave output of 200v at up to 80mA from an input of 12 volt d.c car battery. The output of the 12v push-pull square-wave oscillator is transformer-coupled to step up 30 volts square wave by a specially wound transformer. The transformed voltage is then used as output to energize the probe that will go into the rectum of an animal in order to stimulate it for the ejaculation of the semen. The semen collected is analysed and used to inseminate female animals.

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24

Bogatirov, Igor, Helena Ponuzhdayeva, Denis Koliushko, Serhii Rudenko, and Alexander Istomin. "DIELECTRIC OIL`S TEST MACHINE WISH VOLTAGE RISE ELECTRONIC MODULE." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 1(7) (April 23, 2021): 103–8. http://dx.doi.org/10.20998/2413-4295.2021.01.15.

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For test operations according to the liquid dielectric breakdown voltage measurement method we use high voltage machines that consist of high-voltage step-up transformer, voltage rise block, test cell with electrodes and so on. Described dielectric oil's test machine UIM – 90 with electromechanical voltage rise block. Cause of hard requirements in specification documents about voltage sine wave form on cell's electrodes, we performed field tests for UIM – 90 that help to evaluate the mains voltage impact on the test voltage distortion and measurement accuracy. Was discovered that during usage of electromechanical voltage rise block voltage steps disrupt sine wave’s form proportionally to step-up transformer’s transformation coefficient. Performed analysis of this block’s construction and established that usage of ЛАТР and mechanical voltage controller could lead to additional sine’s wave disruption. Decided to develop electronic voltage rise block which will allow to get rid of mains influence on test data. Created the algorithm of wave shaping from microcontroller, which generates voltage ramp to the amplifier representing pulse width modulator, then to the step-up transformers cascade. Proposed to use additional transformer for level matching of amplifier’s output voltage and main high voltage transformer’s input voltage. Presented flow sheet for UIM – 90 with electronic voltage step-up block and cascading start ofstep-up transformers. Provided voltage oscillograph trace and it spectrograph on the main transformer’s primary side, received due to the implementation of developed electronic voltage step-up block, prove that voltage sine wave form doesn’t rely on mains quality. After upgraded UIM – 90 and it world analogues technical parameters analysis we could make a conclusion about it competitive capability on global level.

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25

Wu, Hongfei, Yangjun Lu, Liqun Chen, Peng Xu, Xi Xiao, and Yan Xing. "High step‐up/step‐down non‐isolated BDC with built‐in DC‐transformer for energy storage systems." IET Power Electronics 9, no. 13 (October 2016): 2571–79. http://dx.doi.org/10.1049/iet-pel.2015.0841.

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26

Zhang, Xiaotian, Xin Xiang, Timothy C. Green, Xu Yang, and Feng Wang. "A Push–Pull Modular-Multilevel-Converter-Based Low Step-Up Ratio DC Transformer." IEEE Transactions on Industrial Electronics 66, no. 3 (March 2019): 2247–56. http://dx.doi.org/10.1109/tie.2018.2823665.

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27

Yoon, Man Soon, T. S. Yoon, J. R. Kim, Y. G. Choi, and Soon Chul Ur. "The Effects of Geometrical Factors on the Step-Up Ratio in Piezoelectric Transformer." Materials Science Forum 539-543 (March 2007): 3319–25. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3319.

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The electromechanical properties of a newly proposed 3-dimensional piezoelectric transformer have been investigated. Especially, the effects of 3-dimensional geometry on the maximum tip displacement were carefully investigated. As a result, it was found that the maximum strain of the 3-dimensional piezoelectric device was significantly enhanced up to 4.5 times higher than that of a disk shape device. This data were in good agreement with the finite element model analysis of strains and vibration modes. Moreover, a very high voltage step-up ratio of 290 (10 times higher than the Rosen type), sustaining efficiency more than 96%, were achieved.

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28

Deng, Yan, Qiang Rong, Wuhua Li, Yi Zhao, Jianjiang Shi, and Xiangning He. "Single-Switch High Step-Up Converters With Built-In Transformer Voltage Multiplier Cell." IEEE Transactions on Power Electronics 27, no. 8 (August 2012): 3557–67. http://dx.doi.org/10.1109/tpel.2012.2183620.

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29

Lv, Li, Jian-Ping Zhou, Yang-Yang Guo, Peng Liu, and Huai-Wu Zhang. "Controlling voltage step-up ratio of Rosen-type transformer based on magnetoelectric coupling." Journal of Physics D: Applied Physics 44, no. 5 (January 17, 2011): 055002. http://dx.doi.org/10.1088/0022-3727/44/5/055002.

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30

Kumari, N. Krishna, D. S. G. Krishna, and M. Prashanth Kumar. "Transformer Less High Voltage Gain Step-Up DC-DC Converter Using Cascode Technique." Energy Procedia 117 (June 2017): 45–53. http://dx.doi.org/10.1016/j.egypro.2017.05.105.

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31

Reddy, Lambu Rushi. "A Transformer less Buck Boost Converter with Positive Output Voltage." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (July 31, 2021): 3575–80. http://dx.doi.org/10.22214/ijraset.2021.37141.

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Some industrial applications require high step-up and step-down voltage gain. The transformer less buck-boost converter has high voltage gain than that of traditional buck-boost converter without extreme duty cycles. A transformer less buck-boost converter with simple structure is obtained by inserting an additional switched network into the traditional buck-boost converter. The two power switches of the buck-boost converter operate synchronously. The operating principles of the buck-boost converter operating in continuous conduction modes are presented. A new buck- boost converter is presented by providing a feedback to the converter. By this, constant output voltage can be maintained under varying load conditions in both buck and boost operation. The output voltage of 40V (step—up mode)/8V (step down mode) is obtained with input voltage 18V and the outcomes are approved through recreation using PSIM MODEL.

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32

Wu, Xiao Dan, and Wen Ying Liu. "Study on Loss Reduction of Large Scale Wind Power Concentrated Integration on Power System." Applied Mechanics and Materials 380-384 (August 2013): 3051–56. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3051.

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In this paper, starting from the active network loss formulas and wind characteristics, it is pointed out the reactive power loss and reactive flow is the major impact of wind power integration on power system loss. The reactive power loss formulas of box-type transformer, main step-up transformer, wind farm collector line and connecting grid line are analyzed. Next the reactive power loss of transformer and transmission line is described in detail. Then put forward the loss reduction measures that installing SVC on the low voltage side of the main step-up transformer and making the doubly-fed wind generators send out some reactive power at an allowed power factor. Use the case of Gansu Qiaodong wind farm to verify the effectiveness of the proposed measures.

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33

Sutan Chairul, Imran, Yasmin Hanum Md Thayoob, Young Zaidey Yang Ghazali, Mohd Shahril Ahmad Khiar, and Sharin Ab Ghani. "Formation and Effect of Moisture Contents to Kraft Paper’s Life of In-Service Power Distribution Transformer." Applied Mechanics and Materials 793 (September 2015): 114–18. http://dx.doi.org/10.4028/www.scientific.net/amm.793.114.

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Examples of solid and liquid electrical insulations for power transformer are mineral oil and cellulose based paper. As transformers performed their function to step-up or step-down voltage level, its’ insulations will be degraded. Paper insulation is considered the most critical component in a transformer insulation system because it is not easily replaced if compared to oil where it is easily reconditioned in-order to remove water and contaminants. Studies show that temperature, moisture contents and oxygen contributed to paper insulation degradation. Moisture and furanic compound were produced from these deterioration processes. This paper is focused on the formation and effect of moisture to Kraft paper’s life. Levels of moisture contents were obtained from in-service power distribution transformers. These data then is used to assess the Kraft paper’s life by means of Weibull plot. This study shows that level of moisture contents can be used to assess the life of Kraft paper insulation.

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34

Iwabuki, Hiroyasu, and Akihiko Iwata. "5kV/50A/2MHz High Voltage Inverter for Gas Discharge Laser without Step-up Transformer." IEEJ Transactions on Industry Applications 127, no. 11 (2007): 1157–63. http://dx.doi.org/10.1541/ieejias.127.1157.

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35

Sutherland, Peter E., and Juan Carlos Parra Garcia. "An Experience With Transformer Connections and Relay Settings for Temporary Generator Step-Up Unit." IEEE Transactions on Industry Applications 49, no. 1 (January 2013): 275–83. http://dx.doi.org/10.1109/tia.2012.2228837.

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36

Soltani, Nima, and Fei Yuan. "A step-up transformer impedance transformation technique for efficient power harvesting of passive transponders." Microelectronics Journal 41, no. 2-3 (February 2010): 75–84. http://dx.doi.org/10.1016/j.mejo.2009.12.010.

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37

Wang, C. M., C. H. Su, and K. L. Fang. "Zero-voltage-switching pulse-width-modulation full-bridge transformer-isolated step-up/down converter." IET Power Electronics 1, no. 1 (2008): 122. http://dx.doi.org/10.1049/iet-pel:20060359.

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38

Forest, F., T. A. Meynard, E. Labouré, B. Gelis, J.-J. Huselstein, and J. C. Brandelero. "An Isolated Multicell Intercell Transformer Converter for Applications With a High Step-Up Ratio." IEEE Transactions on Power Electronics 28, no. 3 (March 2013): 1107–19. http://dx.doi.org/10.1109/tpel.2012.2209679.

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39

Masugata, K., H. Saitoh, H. Maekawa, K. Yatsui, K. Shibata, and M. Shigeta. "Development of high voltage step-up transformer as a substitute for a Marx generator." Review of Scientific Instruments 68, no. 5 (May 1997): 2214–20. http://dx.doi.org/10.1063/1.1148072.

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40

Nouri, Tohid, Naser Vosoughi Kurdkandi, and Mahdi Shaneh. "A Novel ZVS High-Step-Up Converter With Built-In Transformer Voltage Multiplier Cell." IEEE Transactions on Power Electronics 35, no. 12 (December 2020): 12871–86. http://dx.doi.org/10.1109/tpel.2020.2995662.

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41

Li, Wuhua, Weichen Li, Xiangning He, David Xu, and Bin Wu. "General Derivation Law of Nonisolated High-Step-Up Interleaved Converters With Built-In Transformer." IEEE Transactions on Industrial Electronics 59, no. 3 (March 2012): 1650–61. http://dx.doi.org/10.1109/tie.2011.2163375.

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42

Gustavsen, Bjørn, and Bjørn Tandstad. "Wideband modeling of a 45-MVA generator step-up transformer for network interaction studies." Electric Power Systems Research 142 (January 2017): 47–57. http://dx.doi.org/10.1016/j.epsr.2016.08.035.

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Kaczmarek, Michal, and Piotr Kaczmarek. "Comparison of the Wideband Power Sources Used to Supply Step-Up Current Transformers for Generation of Distorted Currents." Energies 13, no. 7 (April 10, 2020): 1849. http://dx.doi.org/10.3390/en13071849.

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In this paper a comparison of the wideband power sources of a pulse width modulation (PWM) inverter and a power supply composed of an audio power amplifier and a two-channel arbitrary generator is discussed. Their application is to supply a step-up current transformer for generation of the distorted current required to test the transformation accuracy of the distorted currents of the inductive current transformers. The proposed equations allow to calculate the maximum rms values of higher harmonic of distorted currents for its required main harmonic component. Moreover, they also enable the calculation of the maximum rms values of the main harmonic of the distorted current for which the required higher harmonic component may be obtained. This defines the usable bandwidth of the tested power source for their specific load. During work on high inductive impedance, the maximum voltage is the limitation that determines the higher harmonic value. While for resistive loads, the maximum current and the transistor’s slew rate are the limiting factors. The usage of the compensation system for the inductive reactance of the step-up current transformer under supply significantly increased its maximum output current. Its rms value with a 10% higher harmonic component up to 5 kHz was almost 400 A instead 100 A for the PWM-based power source and about 800 A instead 200 A for the power supply system with the audio amplifier.

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Kozielski, Lucjan, Agata Lisińska-Czekaj, and Dionizy Czekaj. "Design and Analysis of the PZT-Based Piezoelectric Transformer." Materials Science Forum 514-516 (May 2006): 198–201. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.198.

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Piezoelectric transformer (PT) is a combination of piezoelectric actuator and transducer, which serve as the primary side and the secondary side respectively. In the present study the disk – shaped (of 20 mm in diameter and 0.6 mm in thickness), unipoled radial mode piezoelectric transformer based on modified PZT-type solid solution was custom designed and fabricated. Different input and output area ratios of the PT were studied, namely: 21, 4, 1. The electrical properties like voltage step-up ratio, output power and temperature rise were measured for PT operating at the first resonance frequency. With the driving voltage of 20 VRMS, the 3 W output power, 165 VRMS output voltage an temperature rise of 20 0C was obtained for PT with the input/output area ratio of 1. The voltage step-up ratio of 12.5 was obtained for PT with input/output area ratio of 21.

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Malik, Muhammad Zeeshan, Haoyong Chen, Muhammad Shahzad Nazir, Irfan Ahmad Khan, Ahmed N. Abdalla, Amjad Ali, and Wan Chen. "A New Efficient Step-Up Boost Converter with CLD Cell for Electric Vehicle and New Energy Systems." Energies 13, no. 7 (April 8, 2020): 1791. http://dx.doi.org/10.3390/en13071791.

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An increase in demand for renewable energy resources, energy storage technologies, and electric vehicles requires high-power level DC-DC converters. The DC-DC converter that is suitable for high-power conversion applications (i.e., resonant, full-bridge or the dual-active bridge) requires magnetic transformer coupling between input and output stage. However, transformer design in these converters remains a challenging problem, with several non-linear scaling issues that need to be simultaneously optimized to reduce losses and maintain acceptable performance. In this paper, a new transformer-less high step-up boost converter with a charge pump capacitorand capacitor-inductor-diode CLD cell is proposed using dynamic modeling. The experimental and simulation results of the proposed converter are carried out in a laboratory and through Matlab Simulink, where 10 V is given as an input voltage, and at the output, 100 V achieved in the proposed converter. A comparative analysis of the proposed converter has also been done with a conventional quadratic converter that has similar parameters. The results suggest that the proposed converter can obtain high voltage gain without operating at the maximum duty cycle and is more efficient than the conventional converter.

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Betsi, D., R. Ramya, and Parthasarathy . "NEURO FUZZY BASED MPPT IN TRANSFORMER LESS GRID USING CUK CONVERTER IN STEP UP MODE." INTERNATIONAL JOURNAL OF RECENT TRENDS IN ENGINEERING & RESEARCH 05, Special Issue 07 (March 4, 2019): 42–47. http://dx.doi.org/10.23883/ijrter.conf.20190304.008.iz9ni.

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KAWAOKA, Yoshiki, Toshihiko OZAWA, and Shozo ISHII. "A Nitrogen Laser Pumped by an Excitation Circuit Pulse-charged through a Step-up Transformer." Review of Laser Engineering 14, no. 10 (1986): 908–16. http://dx.doi.org/10.2184/lsj.14.908.

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Rouholamini, Mahdi, Caisheng Wang, Mohsen Mohammadian, and Alireza Bahari. "Optimal location of step-up transformer in radial distribution networks to enhance static voltage stability." International Transactions on Electrical Energy Systems 28, no. 7 (February 8, 2018): e2557. http://dx.doi.org/10.1002/etep.2557.

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Do-Hyun Jang and Gyu-Ha Choe. "Step-up/down AC voltage regulator using transformer with tap changer and PWM AC chopper." IEEE Transactions on Industrial Electronics 45, no. 6 (1998): 905–11. http://dx.doi.org/10.1109/41.735334.

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Moore, Steven P., William Wangard, Kevin J. Rapp, Deanna L. Woods, and Robert M. Del Vecchio. "Cold Start of a 240-MVA Generator Step-Up Transformer Filled With Natural Ester Fluid." IEEE Transactions on Power Delivery 30, no. 1 (February 2015): 256–63. http://dx.doi.org/10.1109/tpwrd.2014.2330514.

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