Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Jan Hlavacek"'
Publikováno v:
IEEE Transactions on Power Delivery. 36:1882-1891
Switching processes of voltage source converters can emit significant high-frequency distortions of frequencies between 5 to 20 kHz. Furthermore, the distortions can partly propagate from the place of their origin into a medium voltage system via cap
Publikováno v:
2020 21st International Scientific Conference on Electric Power Engineering (EPE).
Requirement from practice is the need for quality and precise measurement of unipolar high current impulses, which are applied in resistance spot welding. The reason is the high dependence of weld quality on the shape and energy of applied current im
Publikováno v:
2020 21st International Scientific Conference on Electric Power Engineering (EPE).
The breakdown behavior of oil-barrier insulation is of special interest for design, manufacturing and quality testing for relevant insulations in electrical apparatus. Besides the commonly used mineral oil with different chemical structure (inhibitor
Publikováno v:
I2MTC
The first part of this paper deals with the influence of burden accuracy on the errors of current and voltage instrument transformers. The requirement stated in the prepared standard, corresponding to a tolerance of burden value B ± 3 % and power fa
Publikováno v:
Lecture Notes in Electrical Engineering ISBN: 9783030316792
Natural and synthetic esters will be more and more applied as an alternative fluid to the commonly used mineral oil. The application in electrical apparatus needs, at least, the same withstand ability against electrical breakdown or partial discharge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b4b69fe2ffd6b95ba33407c73ecad04
http://hdl.handle.net/11025/42518
http://hdl.handle.net/11025/42518
Publikováno v:
Lecture Notes in Electrical Engineering ISBN: 9783030316792
Partial discharge (PD) measurement at DC voltage becomes more and more important due to the increased application of HVDC components in electrical power systems. Numerous studies of PD behaviour on various type of insulation at DC have been currently
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3df3219cf374d938297741e53f3257e
https://doi.org/10.1007/978-3-030-31680-8_119
https://doi.org/10.1007/978-3-030-31680-8_119
The paper presents the basic layout for instrument current transformer calibration using comparative method with a standard. The error difference is evaluated using electronic transformer test sets. Calibrating procedure of these systems using error
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bb02bf72132f45e90ae85d886a9e4e4
http://hdl.handle.net/11025/35511
http://hdl.handle.net/11025/35511
Publikováno v:
2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE).
Measurement of partial discharges (PDs) and its phase resolved patterns ($\varphi -\mathrm {q}-\mathrm {n}$ characteristics) is one of the most important diagnostic tools for testing of electrical insulation systems. Degradation mechanisms and identi
Autor:
Jan Hlavacek, Martin Knenicky
Publikováno v:
2018 19th International Scientific Conference on Electric Power Engineering (EPE).
Some high voltage applications use very fast impulses with rise time less than 100 nanoseconds. Measurements of these impulses are difficult, and a lot of different voltage dividers are used. In many cases, inadequate metrological support of calibrat
Autor:
R. Martin, Gabriella Crotti, T. Cincar-Vujovic, R. Kampfer, Enrico Mohns, C. Mester, I. Blanc, A.J. Wheaton, Jan Hlavacek, M. Schnaitt, M. Hammarquist, Emil Dimitrov, H.E. van den Brom, W. Waldmann, Jari Hällström, Renata Styblikova, Karel Draxler, Gert Rietveld, H. Cayci, Fernando Garnacho, A. Bergman, B. Paczek, E-P. Suomalainen, G. Sadkowski
Publikováno v:
Draxler, K, Styblíková, R, Hlavacek, J, Rietveld, G, van den Brom, H E, Schnaitt, M, Waldmann, W, Dimitrov, E, Cincar-Vujovic, T, Paczek, B, Sadkowski, G, Crotti, G, Martin, R, Garnacho, F, Blanc, I, Kämpfer, R, Mester, C, Wheaton, A, Mohns, E, Bergman, A, Hammarquist, M, Çayci, H, Hällström, J & Suomalainen, E-P 2018, Results of an International Comparison of Instrument Current Transformers up to 10 kA at 50 Hz Frequency . in CPEM 2018-Conference on Precision Electromagnetic Measurements . IEEE Institute of Electrical and Electronic Engineers, Conference on Precision Electromagnetic Measurements, CPEM 2018, Paris, France, 8/07/18 . https://doi.org/10.1109/CPEM.2018.8500821
Traceability of the current ratio is crucial for the measurement of electrical energy in revenue metering. A comparison of the AC current ratio was therefore performed within EURAMET in the time period 2012 - 2016, using a precision CT as the traveli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dc64695d4a01930d35857de3a9f2bff
https://doi.org/10.1109/CPEM.2018.8500821
https://doi.org/10.1109/CPEM.2018.8500821