Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Michal Krbal"'
Dielectric Performance of Natural- and Synthetic-Ester-Based Nanofluids with Fullerene Nanoparticles
Publikováno v:
Energies, Vol 16, Iss 1, p 343 (2022)
According to the latest research, nanofluids as a possible future substitution for high-voltage equipment insulation have the potential to enhance the heat transfer and insulation properties of their base fluids. Dielectric properties are represented
Externí odkaz:
https://doaj.org/article/e30ac4a444274714b1bca12850fe0129
Autor:
Mahdi Pourakbari-Kasmaei, Farhan Mahmood, Michal Krbal, Ludek Pelikan, Jaroslava Orságová, Petr Toman, Matti Lehtonen
Publikováno v:
Energies, Vol 13, Iss 15, p 3799 (2020)
Protection of transformers, as one of the most expensive equipment in the power system, against lightning overvoltage impulses is a vital task. This paper, for the first time so far, investigates the effects of a filtered spark gap on the protection
Externí odkaz:
https://doaj.org/article/9e7ccf794f0f4a2d97ef06461e7248b4
VERTICAL DOSIMETRIC MEASUREMENT OF ELECTRIC DISCHARGE INDUCED AT LIGHTNING IMPULSE VOLTAGE GENERATOR
Publikováno v:
Radiation protection dosimetry. 198(9-11)
This paper deals with the measurement of ionising radiation emitted in the vertical field of electric discharge generated between the tip and the grounded plate electrode. The generator set-up was for 400 consecutive negative discharges with voltage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::712438cd23e1aa0b89c98489147713d4
https://pubmed.ncbi.nlm.nih.gov/36005985
https://pubmed.ncbi.nlm.nih.gov/36005985
Publikováno v:
Energies, Vol 12, Iss 11, p 2057 (2019)
This article offers an alternative method of calibrating partial discharge meters for research and teaching purposes. Most current modern calibrators are implemented as precise voltage pulse sources with a coupling capacitor. However, our calibrator
Externí odkaz:
https://doaj.org/article/78ef084c91b44372bdfafac41150f815
Autor:
Miloš Šárpataky, Juraj Kurimský, Michal Rajňák, Katarína Paulovičová, Michal Krbal, Luděk Pelikán
Publikováno v:
Journal of Molecular Liquids. 368:120802
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b753ec0251f075ebf9cfd789987f2216
https://doi.org/10.1016/j.molliq.2022.120802
https://doi.org/10.1016/j.molliq.2022.120802
Publikováno v:
PRZEGLĄD ELEKTROTECHNICZNY. 1:195-201
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66284e59e85e66dcbb655e565524e2a8
https://doi.org/10.15199/48.2019.11.48
https://doi.org/10.15199/48.2019.11.48
Autor:
Farhan Mahmood, Michal Krbal, Jaroslava Orsagova, Matti Lehtonen, Petr Toman, Ludek Pelikan, Mahdi Pourakbari-Kasmaei
Publikováno v:
2020 21st International Scientific Conference on Electric Power Engineering (EPE).
This paper develops an optimization model to find the optimal values for the parameters of the double-exponential function. This function can be used to reproduce the volt-time curves of the standard and nonstandard applied impulse voltages in a soft
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a45e0147a13cef5272164598635aa38
https://doi.org/10.1109/epe51172.2020.9269227
https://doi.org/10.1109/epe51172.2020.9269227
Publikováno v:
2020 21st International Scientific Conference on Electric Power Engineering (EPE).
Paper focuses on simulating a real impulse generator in LTspice in such a way that it is close to real conditions. There is a description of comparison of measured and simulated important monitored values. These are the front time $T_{1}$ and the tim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48f0cbd1464deba0173191702af8fd47
https://doi.org/10.1109/epe51172.2020.9269269
https://doi.org/10.1109/epe51172.2020.9269269
Publikováno v:
2019 20th International Scientific Conference on Electric Power Engineering (EPE).
The High Voltage Test Laboratory in CVVOZEPowerLab is equipped with a Haefely Hipotronics HV Test Transformer HHT7300-300T5-760. This test system is used for withstand voltage, breakdown voltage tests and diagnostics of dielectrics - measurement of p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6aacdefe6ddfc3d500bc0ea9c15cd47
https://doi.org/10.1109/epe.2019.8778099
https://doi.org/10.1109/epe.2019.8778099
Publikováno v:
2019 20th International Scientific Conference on Electric Power Engineering (EPE).
This paper focuses on measuring the electrical properties of samples of insulated cables from several different types of polyethylene and polyvinyl chloride using an automatic electric bridge. The paper shows the change of dielectric properties at di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd211b11ccafa83af03f8b9b00e1a226
https://doi.org/10.1109/epe.2019.8777945
https://doi.org/10.1109/epe.2019.8777945