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Analysis of the technical designs of lightning protection for a commercial building with PV power plant
Paclík, Patrik ; Bátora, Branislav (referee) ; Ptáček, Michal (advisor)
The main objective of the thesis is the issue of lightning and surge protection and demonstration of its practical application at the level of a fictitious object. In the context of this, a search of the currently valid standards and legislation is carried out and a basic list of requirements for the creation of related project documentation is given a key complement of the thesis is the synthesis of lightning and surge protection with the protection of photovoltaic panels located on the roof structure of the building, where the issue of possible damage after lightning strike is addressed and the risks with external and internal protection are analysed. The thesis also includes an evaluation of possible collision in the application of lighting protection and photovoltaic panels, as well as the prevention of the spread of a possible fire from the roof to the object. Three different technical designs of external lightning protection are compared in terms of aesthetics, financial costs and practicality.
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Design and realization of 110 kV overhead and cable line laboratory models
Lelek, Jan ; Jurák, Viktor (referee) ; Ptáček, Michal (advisor)
The bachelor thesis deals with modelling of overhead and cable of 110 kV lines in PSCAD simulation environment and realization of equivalent laboratory models of these lines. The objectives of the thesis also include an approximation of the technical design of 110 kV lines, definition of the necessary parametrs for the creation of the models themselves, including descriptions of the possibilities of mathematical modelling of the lines. Following the fulfilment of the mentioned objectivites, the theoretical part of the thesis presents factual data of 110 kV lines located within the distribution networks of the Czech Republic, including the basic theory related to line parameters. Subsequently, the thesis deals with the introduction of possible approaches of mathematical modelling of lines, targeted description of possible modelling approaches in the PSCAD simulation environment and selection of necessary parameters for the creation of these models. The practical part of the thesis presents the mathematical models of overhead and cable lines, presenting the results of simulations for different operating states of the lines. The practical part also presents in detail the design, realization and laboratory measurement of physical laboratory models of overhead and cable of 110 kV lines. The thesis then includes a comparison between the results obtained for the line models that were created in the PSCAD simulation environment and the laboratory models.
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Design of lightning protection system for a multifunctional building
Drašnar, Antonín ; Bátora, Branislav (referee) ; Ptáček, Michal (advisor)
This final thesis describes the essentials required for the correct process of protecting objects against the destructive effects of lightning current. The focus of the practical part compares selected software tools that facilitates both the risk analysis process of possible damage caused by a lightning strike and enables the finding of adequate protection of the assessed object. The comparison of the software itself is made from the point of view of their availability, clarity and especially also from the point of view of the provided functionalities. The functionalities and options of each software are purposefully demonstrated on a defined complex building, for the implementation of two designs of the lightning protection system, specifically in the version with a distant lightning protection system and using the method of equipotential bonding. Both applied lightning protection are then compared in more detail in terms of technical and economic demands.
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Fuel cell model in PSCAD
Černý, František ; Ptáček, Michal (referee) ; Radil, Lukáš (advisor)
The bachelor thesis deals with the creation of a model of different fuel cells. It is intended to broaden the view of currently available fuel cells their principle function and to describe their advantages and disadvantages. It also describes the basic equation of the magnitude of the voltage generated at the electrodes of the cell and the types of voltage losses that occur during its operation. Creating a custom fuel cell model and comparing simulations of this model with real cells and, with datasheets of available fuel cells.
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Design of overhead line 22 kV with new supporting structure points
Ślusarczyk, Patrik ; Wasserbauer, Vojtěch (referee) ; Ptáček, Michal (advisor)
This bachelor’s thesis deals with the analysis of the existing section of the 22 kV overhead line and the subsequent design of new supportin structure points, meeting the requirements of the operator and generally applicable standards. This section is located on premises of the Větřní transformer substation, with is operated by distribution company EG.D. The content of this work is focused mainly on components, that are used in the area of interest of this particular company. The theoretical part discusses the characteristics of sub-elements of distribution systems and subsequently the mechanical properties under the action of external influences, which have a fundamental role in the behavior of the entire system. A mathematical apparatus is introduced, which is then applied during the design and inspection of the given section. The practical part first deals with the critical evaluation and control calculations of the current state of the line, in relation to the planned reconstruction. Subsequently, the core part of the work is focused on the proposal for the reconstruction of the section of interest, including the relocation of overhead line towers. This step is implemented in the form of drawing documentation and control calculations of the newly designed states, supplemented by assembly tables. Together with these steps, the work is extended by the necessary documentation for grounding the support points, the material specification of all parts and the basic project documentation itself, which can serve as supporting material during reconstructions facing a similar problem.
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MV netwok design for 75 new houses in Damborice
Makuta, Peter ; Novák, Vojtěch (referee) ; Ptáček, Michal (advisor)
Content of this thesis is medium voltage network design for seventy five houses in Damborice. At the beginning author discuss about history of transmission network and distribution network. Next topic is about steady state of network. In theoretic part are different solving methods of linear and non-linear simultaneous equations discussed. Author describes four methods – method of node voltages, elimination of balance node, Gauss-Seidel and Newton method. The electric properties of both the overhead transmission lines and cable lines and their variety are part of this work too. There is purpose, forms and parameters of transformers described. Simplicity of author’s design should reduce the usage of many electrical elements visible to residents.
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Wind Turbine Model for Research and Laboratory Applications
Števček, Tomáš ; Ptáček, Michal (referee) ; Mastný, Petr (advisor)
A major portion of this thesis is devoted to the Whisper 200 wind turbine model in Matlab-Simulink environment. The turbine is installed at the Department of Electrical Power Engineering, FEEC BUT. In the model, several types of simulations can be executed. On that basis, the power curve and mathematical relationships between wind speed and other physical quantities, such as RPM, electic current, and voltage, were obtained. Comparisons of the simulations' results with measurement data illustrate adequate agreement, but limitations of the model remain significant, as is exhaustively documented and commented upon in the thesis. As a partial advancement towards elimination of the model's deficiencies, conditions for substantial performance improvements of the dynamic simulation have been elaborately derived.
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Proposal of measures in the low voltage network for the implementation of renewable sources and electromobility according to scenarios NAP SG
Vojtěch, Jan ; Kučera, Michal (referee) ; Ptáček, Michal (advisor)
The thesis analyzes legislative and strategic documents of the European Union and the Czech Republic which set targets in environment and energy area in 2030, alternatively in 2040. The individual chapter is dedicated to national action plans, where the most important is National Action Plan for Smart Grids setting specific requirements for future development of smart grids. The thesis contains analysis of distribution network in the municipality of Následovice and simplifying assumptions for the implementation of calculation. There are also introduced scenarios which have been used for the calculation of the distribution network with its results. Potential defects of the distribution network are commented with suggested solutions. The calculations were repeated to verify the solutions. Results are recapitulated in an individual chapter. Graphical outputs of the calculations can be found in the attachement.
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Simulation of steady-state and dynamic behavior of low-temperature fuel cell
Smugala, Ondrej ; Radil, Lukáš (referee) ; Ptáček, Michal (advisor)
This bachelor´s thesis is concerned with mathematic modelling of low temperature proton exchange membrane fuel cell (PEMFC). First part of the thesis is focused on explaining the principle of production of electricity by this type of source. The main advantages and disadvantages of this technology are presented there. A division of fuel cells according to the stack temperature and the kind of used electrolyte is also made in this part. Typical technical information is mentioned for every type of fuel cell. The rest of thesis is concerned with the PEMFC. Firstly there is a description of construction of fuel cell and a presentation of applications in the industry. The second part of work includes a mathematical description of steady and dynamic behavior of fuel cell which is based on relations among fundamental parameters and quantities. The other part contains all results of simulation which was made on a model created in Matlab Simulink. Comparison of the results of real measurement with the results of simulation which was performed on a modified model is provided in the last part of thesis.
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The development of the model of PV system for electric water heating
Sochor, Tomáš ; Radil, Lukáš (referee) ; Ptáček, Michal (advisor)
This thesis deals with designing of a model of a photovoltaic system for domestic water heating in program PSCAD. In theoretical part, an analysis of photovoltaic systems regarding their connection to electrical grid is made. Then a description of chosen concepts of photovoltaic systems for domestic water heating is made. Furthemore, a photovoltaic cell is described with regard to its mathematical description and influence of different parameters on its volt-ampere characteristics. Also, a common topologies of DC-DC converters are described. Control is also related to these converters, that is why a fundamental MPPT algorithms are described. Practical part deals with designing of chosen concepts of photovoltaic systems for domestic water heating in program PSCAD. A basic simulations with regard to behavior of these systems are performed, especially a relationship with respect to irradiance and temperature. Simulations are then discussed in the conclusion.
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