Prohlížení České vysoké učení technické v Praze dle autora "Procházka R."

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    • Impact of High-Frequency Voltage Distortion Emitted by Large Photovoltaic Power Plant on Medium Voltage Cable Systems 

      Autor: Kněnický M.; Procházka R.; Hlaváček J.; Šefl O.
      (IEEE Power & Energy Society, 2021)
      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 ...

    • Influence of Voltage Distortion Shape on Partial Discharge Activity in Internal Voids 

      Autor: Procházka R.; Šefl O.
      (Institute of Electrical and Electronics Engineers, Inc., 2020)
      Electrical insulation materials, especially polymers, may contain miniature internal voids. Insulation systems created from such materials might hence suffer from the development of partial discharges in the voids. These ...

    • Life-Time of Oil Filled Insulation Paper under Nonstandard Voltage Stresses 

      Autor: Šefl O.; Kněnický M.; Procházka R.
      (Czechoslovakia Section IEEE, 2018)
      In the recent years, technological development gave rise to numerous systems that utilize power semiconductor devices. As much as these devices improve the performance of electrical systems, they also pollute the network ...

    • Lightning incidence on transmission overhead lines 

      Autor: Jányš P.; Procházka R.
      (Czechoslovakia Section IEEE, 2020)
      The paper deals with an estimation of lightning strike incidence to transmission overhead lines in the context of line outages gathered from an automatic monitoring system. The statistics of the Czech transmission system's ...

    • Thermo-Mechanical Fatigue of a CrMo Steel Applicable to Steam Turbine Shafts 

      Autor: Nesládek M.; Růžička M.; Lutovinov M.; Kuželka J.; Procházka R.; Rund M.; Měšťánek P.
      (Elsevier B.V., 2019)
      The paper is an overview of the work conducted in order to investigate thermo-mechanical fatigue (TMF) performance of a CrMo steel applicable to steam turbine shaft design. Uniaxial TMF tests of tubular specimens under ...