Results 1 to 10 of about 6,208 (194)
DC Transformers in DC Distribution Systems
Energies, 2023 With the rapid development of power electronics technology and its successful application, many demonstration projects of medium/low-voltage DC (M-LVDC) distribution systems have been constructed.
Yangfan Chen, Yu Zhang
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Performance Comparison of Ferrite and Nanocrystalline Cores for Medium-Frequency Transformer of Dual Active Bridge DC-DC Converter [PDF]
Energies, 2021 This article reports an investigation into ferrite and nanocrystalline materials for the medium-frequency transformer of a dual active bridge DC-DC converter, which plays a key role in the converter’s efficiency and power density.
Sakda Somkun +5 more
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Reachability Analysis of Transformer-Isolated DC-DC Converters
EPiC Series in Computing, 2018 Various mission-critical applications necessarily require a transformer in switching converters to obtain DC isolation between the converters’ input and output. Since DC-DC converters are the switching devices, these are modeled as hybrid automata. We present hybrid automaton modeling of two main types of transformer isolated DC-DC converters, namely ...
Omar Ali Beg +2 more
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DC Breakdown Characteristics of Transformer Oil
Electrical Engineering in Japan, 1973 M. Murano, S. Menju, I. Ohshima
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Overview of Research Status of DC Bias and Its Suppression in Power Transformers
Energies, 2022 In this article, the sources of DC bias and its effects on power transformers are first summarized. Secondly, the article classifies and summarizes the current DC bias calculation problems of power transformers, and puts forward some interesting ...
Youliang Sun +3 more
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State Identification of Transformer Under DC Bias Based on Wavelet Singular Entropy
IEEE Access, 2021 To identify the DC bias state of transformers, a DC bias state identification method of transformer based on wavelet singular entropy is proposed in this paper. The vibration principle of transformers under DC bias has been analyzed.
Jun Liu +7 more
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Modular Combined DC-DC Autotransformer for Offshore Wind Power Integration with DC Collection
Applied Sciences, 2022 Offshore wind farms (OWFs) integration are attractive extensively for furnishing more robust power than land wind farms. This paper introduces a modular combined DC-DC autotransformer (MCAT), which contributes to the offshore wind power integration of DC
Yuanjian Song, Zheren Zhang, Zheng Xu
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DC-compensated current transformer [PDF]
2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%.
Pavel Ripka +2 more
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Metrics and Strategies for Design of DC Bias Resilient Transformers
IEEE Open Access Journal of Power and Energy, 2023 Geomagnetic disturbances (GMDs) give rise to geomagnetically induced currents (GICs) on the earth’s surface which find their way into power systems via grounded transformer neutrals. The quasi-dc nature of the GICs results in half-cycle saturation
Akhil Prasad +3 more
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Design of Power Transformer with Frequency 1 Khz
Communications, 2023 This paper deals with the noise level of power transformers operating at a middle frequency from 800 Hz to 2000 Hz. The factors that influence the noise produced by power transformers are size, design and operating conditions. The research shows that the
Marek Franko +4 more
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