Ústav elektroenergetiky
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Evaluation of Filtered Spark Gap on the Lightning Protection of Distribution Transformers: Experimental and Simulation Study
(MDPI, 2020-07-24)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 ... -
Experimental Investigation of Critical Heat Flux on Different Surfaces at Low Pressure and Low Flow
(MDPI, 2020-10-06)Steady state flow boiling experiments were carried out on several heated tubes with outer diameter 9.14 mm at outlet pressures 120, 200 and 300 kPa, inlet temperatures 64, 78 and 91 °C and approximately 400, 500, 600 and ... -
Cross section determination for TAD materials in quasi mono-energetic neutron spectrum from p(Li) reaction
(EDP Sciences, 2020-10-03)Threshold activation detectors (TAD) are of great importance for a determination of neutron energy spectra and flux density. For different sources, it is necessary to choose the right combination of materials that cover ... -
Hybrid Photovoltaic Systems with Accumulation—Support for Electric Vehicle Charging
(MDPI AG, 2017-06-22)The paper presents the concept of a hybrid power system with additional energy storage to support electric vehicles (EVs) charging stations. The aim is to verify the possibilities of mutual cooperation of individual elements ... -
Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps
(MDPI, 2020-03-31)Light emitting diode (LED) lamps are now an established lighting technology, which is becoming prevalent in all load sectors. However, LED lamps are non-linear electrical loads, and their impact on distribution system ... -
Practical Experience of Operational Diagnostics and Defectoscopy on Photovoltaic Installations in the Czech Republic
(MDPI - Open Access Publishing, 2015-10-12)This paper is focused on the operation of PV power plants in the conditions of the CR. A final analysis of the operational measurements performed and potential approaches and methods applicable to operational diagnosis of ... -
On Resistance and Inductance of Solid Conductors
(Hindawi, 2013-03-20)The concepts of resistance and inductance are strewn with misunderstanding and errors that result from inaccurate terminology, mistakes in their definitions, and from the fact that they are quantities that characterize elements ...
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