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The motor drive control of the gas insulated disconnector of ABB switchgear
Kyseľ, Martin ; Ficek, Jan (referee) ; Orságová, Jaroslava (advisor)
This bachelor's thesis focuses on addressing the issue of controlling three-position disconnectors in gas-insulated switchgear by ABB. The aim of the thesis was to create drawings for three-position control methods and analyze their properties. The introduction provides a detailed analysis of the structure and components of gas-insulated switchgear. It further examines the issue of three-position disconnectors and their various control methods. The practical part of the thesis deals with the design of standardized control circuits for disconnector motor drives, which efficiently utilize space and optimize costs. The individual circuits were compared to select the most suitable replacement for the original control system. A model was created to verify the functionality of the proposed solutions, serving to demonstrate their operation.
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Electrolytes characterization based on mixtures of ionic liquids and aprotic solvents
Šašek, Martin ; Libich, Jiří (referee) ; Máca, Josef (advisor)
The thesis deals with liquid aprotic electrolytes based on mixtures of ionic liquid and solvent. EmimBF4, namely 1-ethyl-3-ethylimidazolium tetrafluoroborate, was used as the starting ionic liquid. A mixture of propylene carbonate, ethylene carbonate and dimethyl carbonate was used as solvents. Electrolytes were enriched with two electrolyte salts LiBF4 and NaBF4 from the resulting mixtures selected the most suitable electrolytes for Li-ion and Na-ion accumulators. Electrolytes were selected taking into account the required properties: the width of the potential window, the measured electrical conductivity and, last but not least, the safety.
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Electrolytes characterization based on mixtures of ionic liquids and aprotic solvents
Šašek, Martin ; Libich, Jiří (referee) ; Máca, Josef (advisor)
The thesis deals with liquid aprotic electrolytes based on mixtures of ionic liquid and solvent. EmimBF4, namely 1-ethyl-3-ethylimidazolium tetrafluoroborate, was used as the starting ionic liquid. A mixture of propylene carbonate, ethylene carbonate and dimethyl carbonate was used as solvents. Electrolytes were enriched with two electrolyte salts LiBF4 and NaBF4 from the resulting mixtures selected the most suitable electrolytes for Li-ion and Na-ion accumulators. Electrolytes were selected taking into account the required properties: the width of the potential window, the measured electrical conductivity and, last but not least, the safety.
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Criteria decision for the allocation of conferences and congresses in Prague
Trávová, Veronika ; Jenčková, Jiřina (advisor) ; Abrhám, Josef (referee)
The aim of the thesis named Decision criteria for the allocation of conferences and congresses in Prague is to analyse all the factors, which influence the choice of a particular congress or conference destination. The priority is to evaluate the congress tourism potential of the city of Prague and to suggest options for the innovation in order to increase the popularity of the destination. The thesis analyses the characteristics of the whole decision process of allocation a congress or a conference. Moreover, the activity of congress or conference organizers and destination organizations is described as well. The thesis is divided into four chapters. In the first and the second one, the substantial concepts of congress tourism, its organization and subjects are defined and characterized. The second target of this thesis is focused on the analysis of the decision criteria for the choice of the congress destination, the potential of Prague including SWOT analysis and the consequent summarization of impacts and possible innovations for Prague. The given interviews and materials from professionals in this field are the main sources for this thesis. In the end of the thesis, the overall situation in the congress tourism in Prague is evaluated and some suggestions for innovations for congresses or conference organization are proposed.
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