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Short-circuit resistance of the disconnector KBE, 38 kV, 3150 A
Šťastná, Antonie ; Šimek, David (referee) ; Bušov, Bohuslav (advisor)
The bachelor's thesis is focused on the calculations of electrodynamic forces and short-term warming for the disconnector of the company IVEP a.s. within the framework of the issue of short-circuit resistance. The first part contains a theoretical summary of high voltage switching devices, their division and functions. The next part describes the problem of short-circuit currents, and the third part contains an introduction to IVEP devices. In the fourth part, essential information affecting the short-circuit resistance test of the KBE disconnector, 38 kV, 3150 A, is selected and described from the relevant standards related to the topic of the thesis. The main part of the thesis is devoted to calculations of electrodynamic forces affecting on the relevant disconnector and calculation of short-term heating in critical places of the current-carrying path. In the thesis, the achieved results are commented on and possible adjustments are suggested in case of inequality with the standards.
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Design of a transformer station for power output from a PV power plant and a diesel generator
Marák, Jiří ; Procházka, Aleš (referee) ; Orságová, Jaroslava (advisor)
This thesis is about design of a transformation station for power output from both a photovoltaic power plant and a diesel generator, serving as grid support. The primary objective is to devise a comprehensive solution including conceptualization, grid connection point, and transformer specifications capable of handling the 5 MW power output from the PV plant and the 1000 kW output from the diesel generator, including the calculation of short-circuit conditions. Furthermore, the thesis delves into the design of network breakpoints and protective measures.Lastly, it proposes dispatch control and billing metering in accordance with the operational requirements stipulated by the distribution system operator.
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Project of Outgoing Transformer Unit for the Photovoltaic Power Station
Hanák, Miroslav ; Procházka, Aleš (referee) ; Orságová, Jaroslava (advisor)
This master’s thesis engages in project of outgoing transformer unit for the photovoltaic power station. It describes project and its design documentation what conducts to practising of construction. It has compared investing to more expansive transformer what has lower loss. It describes charges of operation’s transformer in twenty years. It leads project of cable low voltage. It compares whether is better to use aluminium or cupric cables. Project is led with respect for investment costs and minimum of operation loss.
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LED failures
Doležal, Petr ; Krbal, Michal (referee) ; Pavelka, Tomáš (advisor)
This bachelor thesis is dealing with description of the principle generation light in the LED light sources. In the text we can find principle function of LED, history, possibilities of brightness control, power supply and various types of structures. There are described photometric and electrical parameters. Other part of this thesis is the description of effects leading to failure and malfunction of LED light sources. The practical part of this thesis contains measuring on samples of power LED emitting white light and verification of operational effect leading to the failure of LED light sources.
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Diagnostics of air circuit breaker for low voltage
Bartoš, Jan ; Pavelka, Samuel (referee) ; Bušov, Bohuslav (advisor)
This bachelor work is focused on low-voltage circuit breakers. It also includes the history of the low voltage circuit breakers. Subsequently, the label values of the Siemens air circuit breaker are described and the comparison of this circuit breaker with competitors' products is shown. Basic principes of diagnostics is explained in this bachelor work. Work is focused on examination of the standardized type tests such as temperature rise test, tripping limits and characteristics test, dielectric properties test.
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Způsoby ochrany elektronických komponent motorových vozidel
Němec, David
The bachelor’s thesis „Methods of protection of electronic components of motor vehicles“ in the introductory part acquaints the reader with electrical faults occurring in motor vehicles. The following section describes methods and means to protect against these faults. Furthermore, the work describes the current methods of protection of electronic control units and legislative requirements that impose obligations on manufacturers and suppliers in the design of protective devices for electronic modules of motor vehicles. The last part describes the means to protect the communication networks of motor vehicles against electromagnetic interference and electrostatic discharge.
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Diagnostics of air circuit breaker for low voltage
Bartoš, Jan ; Pavelka, Samuel (referee) ; Bušov, Bohuslav (advisor)
This bachelor work is focused on low-voltage circuit breakers. It also includes the history of the low voltage circuit breakers. Subsequently, the label values of the Siemens air circuit breaker are described and the comparison of this circuit breaker with competitors' products is shown. Basic principes of diagnostics is explained in this bachelor work. Work is focused on examination of the standardized type tests such as temperature rise test, tripping limits and characteristics test, dielectric properties test.
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LED failures
Doležal, Petr ; Krbal, Michal (referee) ; Pavelka, Tomáš (advisor)
This bachelor thesis is dealing with description of the principle generation light in the LED light sources. In the text we can find principle function of LED, history, possibilities of brightness control, power supply and various types of structures. There are described photometric and electrical parameters. Other part of this thesis is the description of effects leading to failure and malfunction of LED light sources. The practical part of this thesis contains measuring on samples of power LED emitting white light and verification of operational effect leading to the failure of LED light sources.
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Project of Outgoing Transformer Unit for the Photovoltaic Power Station
Hanák, Miroslav ; Procházka, Aleš (referee) ; Orságová, Jaroslava (advisor)
This master’s thesis engages in project of outgoing transformer unit for the photovoltaic power station. It describes project and its design documentation what conducts to practising of construction. It has compared investing to more expansive transformer what has lower loss. It describes charges of operation’s transformer in twenty years. It leads project of cable low voltage. It compares whether is better to use aluminium or cupric cables. Project is led with respect for investment costs and minimum of operation loss.
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