Results 301 to 310 of about 766,223 (354)

Differential Protection for Converter Transformers

12th IET International Conference on Developments in Power System Protection (DPSP 2014), 2014
This paper will present differential protection schemes used for special Converter Transformers. These transformers are typically used to feed MV drives, power electronic or FACTS devises. Converter transformers are industrial power transformers which may have phase angle shift different from standard 30o or a multiple of 30o.
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Multiphase Converter Based on Transformer Coupling

IEEE Transactions on Power Electronics, 2011
In this paper, a multiphase converter where the phases are coupled by transformers is proposed to implement a minimum energy-storage converter. Advantages and drawbacks of this topology are analyzed and validated by means of three prototypes. The two main advantages of the minimum energy-storage concept are that the converter can be operated at very ...
M. Carmen Gonzalez, Pedro Alou, Oscar Garcia, Jesus Ángel Oliver, Roberto Prieto, Jose Antonio Cobos, Horacio Visairo   +6 more
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Transformation Elastography: Converting Anisotropy to Isotropy

2020 IEEE 17th International Symposium on Biomedical Imaging (ISBI), 2020
Elastography refers to mapping mechanical properties in a material based on measuring wave motion in it using noninvasive optical, acoustic or magnetic resonance imaging methods. For example, increased stiffness will increase wavelength. Stiffness and viscosity can depend on both location and direction. A material with aligned fibers or layers may have
Martina Guidetti, Dieter Klatt, Thomas J. Royston   +2 more
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Optimization and Analysis of Leakage Reactance for a Converter Transformer of the Electric Transport System

Journal of Electrical Engineering and Technology, 2023
Kamran Dawood, Güven Kömürgöz, Fatih Isik   +2 more
semanticscholar   +1 more source

Electrical Field Distribution in ±600 kV Converter Transformer Bushing Core with the Application of Epoxy Resin with Nonlinear Conductivity

IEEE International Conference on High Voltage Engineering and Application, 2018
The converter transformer as the conversion center for switching DC and AC is particularly crucial and is the key equipment of HVDC power system. As the weakness of the converter transformer, it is easy for the insulation failure to happen on the ...
Jin Li, B. Du, Hucheng Liang, M. Xiao, M. Fu, Y. Jing, Y. Gao   +6 more
semanticscholar   +1 more source

Isolated ZVS two-transformer boost converter

2009 IEEE Energy Conversion Congress and Exposition, 2009
A new zero-voltage-switching (ZVS) two-transformer boost converter (TTBC) is proposed in this paper. The magnetizing inductors of two transformer act as boost inductor, while two transformers provide a galvanic isolation. Moreover, ZVS of all switches can be achieved. Therefore, the proposed converter is promising for high step-up isolated applications
null Ki-Bum Park, null Chong-Eun Kim, null Duk-You Kim, null Gun-Woo Moon, null Myung-Joong Youn   +4 more
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The On-site Measurement Research of Converter Transformer Harmonic Losses Based on Harmonic Power Source

IEEE International Conference on High Voltage Engineering and Application, 2018
HVDC converter transformer is a highly nonlinear transmission of harmonic source, which produces large amounts of harmonic current during the operation.
Jia Pengfei, Zhang Shuqi, Yu Xinru, Wu Chao, Guan Jianxin   +4 more
semanticscholar   +1 more source

Quarter-Turn Transformer Design and Optimization for High Power Density 1-MHz LLC Resonant Converter

IEEE transactions on industrial electronics (1982. Print), 2020
In this paper, quarter-turn planar transformer structure is proposed and implemented in an LLC resonant converter for server power supply applications.
Yu-Chen Liu, Kai-De Chen, Chen Chen, Yong-Long Syu, Guan-Wei Lin, Katherine A. Kim, H. Chiu   +6 more
semanticscholar   +1 more source

Harmonic load losses in HVDC converter transformers

IEEE Transactions on Power Delivery, 1991
Short-circuit losses were measured on a 213 MVA single-phase converter transformer at a number of frequencies between 60 Hz and 6 kHz. Using the results of these tests the harmonic losses during AC/DC converter operation were calculated. Variations of harmonic losses with transformer reactance, transformer winding stray loss factor and converter firing
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Power converters simulation via wavelet transforms

COM.P.EL.98. Record 6th Workshop on Computer in Power Electronics (Cat. No.98TH8358), 2002
This paper presents a new approach for the analysis and the resolution of power electronics circuits, based on the Haar set of orthogonal wavelet functions. A simple recursive algorithm for construction of the integral and convolution matrix, associated with these operators in the domain, are proposed.
A. Gandelli, S. Marchi, A. Monti, M. Riva   +3 more
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