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Utilization of biomass for small business or houses
Láník, Lukáš ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
Thesis deals with usage of biomass as an energy source for smaller plants and houses. Thesis showes us how to use different types of biomass. In the next part of thesis is mentioned the help from the state in case your are using this kind of energy, different types of dotations ane advantages. In the thesis is described the procedure of designing nex heat source and making decision about it. The last part of thesis compares the economic running boiler on land gas to boiler of different kinds of biomass.
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Analysis of Smart Grid devices
Kolacia, Tomáš ; Šlezingr, Jan (referee) ; Radil, Lukáš (advisor)
This work deals with smart grids and smart metering in power grids. The first part of the thesis is focused on the comparison between classic topology of electrical grid and smart grid concept including the benefits, which could be achieved. The other parts of smart grid concept are described as well, such as energy storage and electromobility including charging points infrastructure. The second part of the thesis deals with smart metering devices and it describes routing protocols for smart grids. The following chapters summarize practical experience with addressed issues in Europe and in the Czech Republic. The last part is dedicated to evaluation of smart metering implementation in the Czech Republic.
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Operation of a distribution system with resistance welders
Zelený, Miroslav ; Šlezingr, Jan (referee) ; Drápela, Jiří (advisor)
This Diploma thesis deals with assessment of the influence of two fundamental types of resistance welders operation on chosen power quality parameters at the point of common coupling (PCC) of the power network. The assessed parameters of power quality are the total harmonic distortion of the supply voltage, asymmetry of the supply voltage and the level of short term flicker at the point of common coupling. The assessment is based on the comparison of the results of computer simulations done in PSCad 4.2.0 with the requirements of technical standards. The outcome of this thesis is the determination of allowable limits for physical and operation parameters for the general arrangement of a power distribution network and a resistance welder that should guarantee the power quality compliance.
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Design of island photovoltaic system
Halás, Andrej ; Radil, Lukáš (referee) ; Šlezingr, Jan (advisor)
This thesis systematize a design of stand-alone photovoltaic systems, provides a general view of the current possibilities and represents simple and lucid manual for designers. The first part is dedicated to the description of parameters, functions, comparison of the elements of the off-grid system and selection between the most commonly used technologies. The thesis focuses attention on the right selection of appropriate elements to create an effective and safe system. The second part is peripherally dedicated to law related to installation of systems of this type. The result of theoretical practice and the last part is an example of sizing a small island system.
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Draft methodology for processing and evaluation of long-term measurements on PV Panel
Žák, Tomáš ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
This bachelor thesis aims to analyse the physical theory behind the photovoltaic cells and propose extension measurements for a modernised on-line laboratory. The first part of this thesis describes the theory of the photovoltaic conversion of solar energy into electricity. The p-n junction is described in detail because of its importance for a thorough understanding of the subject. The temperature dependence of a photovoltaic panel, i.e. the negative impact of rising temperature on the output power, is also described here. The contributions of this thesis include a summary of the current situation and the system of state subsidies for the current year as well as a proposal for an extension of measurements in an on-line laboratory, which is to be modernised, at the Department of Power Engineering. Therefore, the thesis includes some specific proposals of graphic dependence, which have a significant information value, and a possible further extension of the laboratory with new measuring and measured elements, which would be helpful for deeper understanding of the subject. In particular, it would be useful for understanding which factors influence the output power of a photovoltaic panel, both significantly and less significantly, which is undoubtedly the most important point.
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A Virtual Instrument for Measurement of Flicker
Cabala, Ľuboš ; Bok, Jaromír (referee) ; Šlezingr, Jan (advisor)
This thesis deals with the voltage fluctuation, its causes, resourses and affections on light sources. Further the posibbilities of the voltage fluctuations limitation are mentioned. This thesis also contains the decriptions of construction of UIE/EIC flickermeter on which bases the virtual flickermeter is programmed in the LabVIEW.
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Laboratory wind turbine control system
Borski, Roman ; Bok, Jaromír (referee) ; Šlezingr, Jan (advisor)
This thesis is about creating measure and control system for wind turbine DS 300. This system purpose is data collection of wind turbine, especially measurement of supplied power and their archivation. Next is to expend control functions, which are supported by transducer, that is provided by the wind turbine manufacturer, especially for remote shut-down function of wind turbine. Created control system is based on CompactRIO platform, whose software is created in LabVIEW.
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Determination of the energy potential of autonomous object and its use
Dohnal, Josef ; Šlezingr, Jan (referee) ; Baxant, Petr (advisor)
The aim of this bachelor´s thesis is to refer briefly about possibilities of obtaining energy from locally available resources for autonomous object and the definition of the term – an autonomous object. This bachelor´s thesis mentions processes how to gain energy from different sources, possibilities of their implementation (from a legislative perspective) or suggestions on how to save gained energy. We are concerned in the autonomous objects primarily and in the acquisition of heat and electrical energy, so the thesis is also divided into two main subsections dedicated to determining the required amount of the energy that would cover our demand for it. The next section briefly discusses the construction of Savonius wind turbine generator which we can build ourselves. This is a hybrid system that consists of a solar photovoltaic panel and the wind turbine with the appropriate electrical devices. Construction of Savonius wind turbine is documented in the chapter Appendix, where you can find photographs showing construction phases. It should be noted that the construction is not completed and the determination of some parameters were not possible technically at home. These measurements would be flawed. Individual issues are then briefly explained and described how they would be in the ideal case. In conclusion, the procedure for calculating is outlined by the method called NPV (Net Present Value), which is often used.
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Using WXT520 meter station for measuring the wind energy
Skalička, Jiří ; Macháček, Jan (referee) ; Šlezingr, Jan (advisor)
This bachelor’s thesis introduces the basics of wind energy. It explains the formation of wind, various types of wind engines, different types of wind power plants (divided by installed capacity), basic methods for wind array determination and wind potential in Czech Republic. Then it turns to Vaisala Weather Transmitter WXT520, which is ideal for measurements in wind energy industries. It explains the transmitter’s basic functions, connection and communication options. Practical part of this thesis is dedicated to realization of measurement using National Instruments CompactRIO platform and LabView development environment. Output of this thesis is a program for long term measurements of meteorological data, analysis and archiving of this data.
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