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| Description
| - An increasing requirement on electrical power systems to be more economically effective and reliable as well, led to the application of new materials in the production of power and instrument transformers. Mainly the use of amorphous and nanocrystalline materials for magnetic cores offers a considerable reduction of electrical losses and also expand the frequency range of the instrument transformers. On the other hand, these positive effects can produce some difficulties when the transients occur (transformer energization/deenergization, ferroresonance effect etc.). The ferroresonance effect can produce overvoltage, which is not allowable for the electrical power grids operation and is dangerous for insulation systems. The paper deals with different mathematical models of ferromagnetic materials in order to simulate various transients, especially ferroresonance. The aim is to describe and compare the power system behavior for the cases, when the magnetic cores are made of nanocrystalline material and common iron material. Many mathematical models of hysteresis loop were developed in the past. For our purposes we use the model developed by some authors of this paper. After performing several numerical trials, authors have found two successful models whose accuracies were verified experimentally for an iron magnetic core. The verification of the presented model for a toroidal and C-type cores made of nanocrystalline material was performed. The investigation of ferroresonance phenomena in power systems, when the magnetic cores are built of nanocrystalline materials, will be presented in the full paper.
- An increasing requirement on electrical power systems to be more economically effective and reliable as well, led to the application of new materials in the production of power and instrument transformers. Mainly the use of amorphous and nanocrystalline materials for magnetic cores offers a considerable reduction of electrical losses and also expand the frequency range of the instrument transformers. On the other hand, these positive effects can produce some difficulties when the transients occur (transformer energization/deenergization, ferroresonance effect etc.). The ferroresonance effect can produce overvoltage, which is not allowable for the electrical power grids operation and is dangerous for insulation systems. The paper deals with different mathematical models of ferromagnetic materials in order to simulate various transients, especially ferroresonance. The aim is to describe and compare the power system behavior for the cases, when the magnetic cores are made of nanocrystalline material and common iron material. Many mathematical models of hysteresis loop were developed in the past. For our purposes we use the model developed by some authors of this paper. After performing several numerical trials, authors have found two successful models whose accuracies were verified experimentally for an iron magnetic core. The verification of the presented model for a toroidal and C-type cores made of nanocrystalline material was performed. The investigation of ferroresonance phenomena in power systems, when the magnetic cores are built of nanocrystalline materials, will be presented in the full paper. (en)
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| Title
| - Simulation and analysis of ferroresonance in power circuits with a nanocrystalline magnetic materials
- Simulation and analysis of ferroresonance in power circuits with a nanocrystalline magnetic materials (en)
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| skos:prefLabel
| - Simulation and analysis of ferroresonance in power circuits with a nanocrystalline magnetic materials
- Simulation and analysis of ferroresonance in power circuits with a nanocrystalline magnetic materials (en)
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| skos:notation
| - RIV/68407700:21230/14:00224732!RIV15-MSM-21230___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21230/14:00224732
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - electrical power system; ferroresonance; nanocrystalline magnetic cores (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Kyncl, Jan
- Procházka, Radek
- Hariram, Adithya
- Musálek, Lubomír
- Straka, Libor
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| http://localhost/t...ganizacniJednotka
| |
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