Results 221 to 230 of about 3,607 (265)

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.
openaire   +1 more source

ZVS Resonant Converter With Series-Connected Transformers

IEEE Transactions on Industrial Electronics, 2011
This paper presents a new series-resonant converter with series-connected transformers in order to realize zero voltage switching (ZVS) for power switches, zero current switching (ZCS) for rectifier diodes at full load, less transformer secondary winding with a full-wave rectifier, and load current sharing. Two series-resonant converters using the same
Bor-Ren Lin, Shin-Feng Wu
openaire   +2 more sources

CONVErT: A framework for complex model visualisation and transformation

2012 IEEE Symposium on Visual Languages and Human-Centric Computing (VL/HCC), 2012
Model Driven Engineering (MDE) has become a commonly used approach in software engineering. It promotes using models as primary artefacts and proposes methods for transforming them to desired software products. However, the specification of models and their transformations in MDE with current techniques is not user-friendly, due to excessive use of ...
Iman Avazpour, John Grundy 0001
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Effects of DC Ground Electrode on Converter Transformers

IEEE Power Engineering Review, 1989
DC transmission systems are normally equipped with a DC ground electrode for emergency or normal operation with or without ground return. In all cases, the DC ground stabilizes the DC voltage. During operation with ground return, a DC ground potential rise occurs at the DC ground electrode and DC voltage is transferred to the station ground.
A.P.S. Meliopoulos, G. Christoforidis
openaire   +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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A transformer-like model for the DC/AC converter

IEEE International Conference on Industrial Technology, 2003, 2004
The paper proposes a two-port model of the inverter leg as building block to simulate the various topologies of switched-mode DC/AC converters, overcoming the problems encountered with the usual switch-diode simulation approach while retaining the interaction between the AC and DC sides.
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Converter transformers

2015
  +4 more sources

“Converted and always converting”: Transformational spirituality as metanoia

International Review of Mission, 2010
AbstractThis paper reflects from the local context on the issues of living in creation, and explores to what extent, if at all, our theology of creation leads our ethics and spirituality of creation. It begins by examining the theology of creation that is voiced within the author's church.
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Research on distribution characteristics of vibration signals of 500 kV HVDC converter transformer winding based on load test

International Journal of Electrical Power and Energy Systems, 2021
Zhanlong Zhang, Zijian Dong, Rui Xiao
exaly  

Calculation of DC Bias Reactive Power Loss of Converter Transformer via Finite Element Analysis

IEEE Transactions on Power Delivery, 2021
Xinghua Liu, Peng Wang, Gaoxi Xiao
exaly