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The development of energetics in the Czech Republic during the following years
Musil, Miloš ; Kracík, Petr (referee) ; Toman, Filip (advisor)
This thesis analyses the current Czech energy sector. It describes its current state and outlines possible scenarios of its development in future years in the context of the energy transformation. The thesis seeks to analyse the current situation of the energy sector in the country, assess its strengths and weaknesses and identify opportunities and threats for future development. The thesis describes the different parts of the Czech energy sector, such as the electricity, gas, heating and oil industries, including production sources, consumption and emissions. Most emphasis is given to the electricity sector. The capacities and potentials of the different sectors are analysed alongside the possible future scenarios outlined. Part of the thesis is also focused on describing and explaining the composition and construction of electricity and gas prices in the Czech Republic. Emphasis is also placed on placing the Czech energy sector in the broader context of the energy sectors of European countries and includes various scenarios for the development of the electricity sector in Europe. In the context of the current geopolitical situation in Europe and the modernisation and transformation of this sector, it is necessary to build new energy sources.
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The investment portfolio and its creation
Sivenkova, Marietta ; Toman,, Petr (referee) ; Ptáček, Roman (advisor)
The diploma thesis deals with the compilation of a diversified investment portfolio for a retail investor. Theoretical knowledge is defined in the first part of the thesis. In the next part, a comparison of two indices is made - S&P 500 and DJIA 30. Part of the diploma thesis is the analysis and comparison of each sector of the economy with shares according to 9 different indicators. Next, the ETFs of each of the precious metals are compared and the best ones are selected. In the end, an investment recommendation is formulated.
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Evaluation of the investment plan and its expected impact on the company's financial health
Bartík, Vlastimil ; Toman,, Petr (referee) ; Ptáček, Roman (advisor)
The diploma thesis deals with the evaluation of an investment project and its possible impacts in the matter of a construction of a new multipurpose building for a specific company. The thesis is divided into three main parts. A theoretical part, which provides informational background in the areas of investments and their evaluation, an analytical part, which then creates an analysis based on this knowledge for the last part, the design part, in which the planned investment will be assessed based on the chosen methods, along with the expected impacts on the financial health of the aforementioned specific company.
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Stability Issues in Modern Power Systems
Koudelka, Jan ; Schürhuber, Robert (referee) ; Braciník,, Peter (referee) ; Toman, Petr (advisor)
Disertační práce se zabývá problematikou stability v moderních elektrizačních soustavách, které jsou typické nárůstem podílu obnovitelných zdrojů a integrací nových technologií. Práce je koncipována jako soubor vysvětlivek, komentářů a poznámek k recenzovaným článkům publikovaným autorem v konferenčních sbornících a časopisech. Vybrané publikace, prezentované v práci, se týkají tří tematických kategorií: dynamická (úhlová) stabilita elektrizační soustavy, frekvenční stabilita elektrizační soustavy a frekvenční odlehčování. Stěžejní prezentovaná témata jsou výpočty kritického času jako ukazatele dynamické stability a možnosti využití nových technologií jako jsou nabíjecí stanice pro elektromobily pro podporu soustavy v nouzovém stavu. Základní používanou metodou analýzy jsou dynamické simulace na zjednodušených modelech soustav.
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Design of electrical power supply of city Jičín
Vánský, Pavel ; Kopička, Marek (referee) ; Toman, Petr (advisor)
The thesis deals with the issue of voltage changes or changes in the supply of electric energy of the particular town. The work entitled "Design of electrical power supply of city Jičín" addresses the specific case of unification of the town of Jičín. The first part describes the current state of distribution equipment, including calculations of short-circuit conditions, cross sections, a description of the sites of electricity consumption and the power consumption of the town. From the detailed description of the current state it is clear that most of the equipment is beyond its mean time to breakdown and has been in operation longer than intended. The next chapters describe possible solutions to reconstruction of the facilities. The first option – marked as option A – aims to maintain the existing 10kV distribution lines. Option B presents a solution in the form of abolition of urban transformation and transition to the 35kV voltage level (which is the voltage level used in the CEZ Distribution plc, eastern area). A comparison of proposed options is made in the technical-economic evaluation. The evaluation brings a detailed description of progress of implementation and planning of the reconstruction of facility particular parts for individual years. The conclusion summarizes the results of the technical-economic assessment of both options and gives reasons why option B, which proposes transition to the 35kV voltage level, is more advantageous.
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Primary testing of the protection relays
Macek, Vratislav ; Topolánek, David (referee) ; Toman, Petr (advisor)
The main subject of this bachelor’s thesis is the creation of laboratory task on the issue of primary injection testing of the protection relays. The thesis is made up of two parts: theoretical and practical. In theoretical part there are information concerning the issue of protecting. One of them the meaning and relay function, requirements applicable on them, failure states, which may arise on the device operation, description of instrument transformers and methods of testing relays. In practical part is created laboratory task on the issue of primary injection testing of overcurrent relay, of which will demonstrate the influence of load current transformer to its function. In task are used Overcurrent and Earth-fault protection REJ 525A and measuring instrument Omicron CPC 100.
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Communication standard IEC61850 for MV substation
Lednický, Pavel ; Majer, Karol (referee) ; Toman, Petr (advisor)
ABB s r.o. is one of the most important companies that are concerned with setting of trends in electro-energetic field. One of these trends is digitalization of medium voltage substations that leads to simplified of internal connection and easier connection of substation to the control system. This thesis deals possibilities of connection of communication, methods of controlling logical operations by centralized or distributed system and compares potential of these systems.
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Analyses of the breaker/limiter functions for low voltage supply points
Bajánková, Denisa ; Toman, Petr (referee) ; Topolánek, David (advisor)
The diploma thesis provides an insight into the remote control and disconnection of DSO supply points phenomenon. The remote or local disconnection/connection of supply point is allowed by the breaker function. The automatic disconnection of supply point is enabled by the limiter function. Due to the anticipated implementation of smart meters in the Czech Republic in the future, this work contains the comprehensive description of breaker/limiter function with proposed possibilities of use in the Czech Republic. The thesis deals with the current breaker/limiter function use in the Czech Republic and in other countries. It introduces the smart meter installation in pilot projects to analyze the breaker/limiter function use in other countries. The thesis is focused on the technical solution of breaker/limiter. Moreover, it describes the ways of connecting the breaker, settting the limiter, connecting/disconnecting a supply point and breaker operation. Further, the thesis introduces the ways of activating the breaker by a customer and defines in which cases it is possible to limit and interrupt the electricity supply in the Czech Republic currently. The main aim of thesis is to describe the specific possibilities of breaker/limiter function use in the Czech Republic. With regard to the function use in other countries and the limiting or interrupting the electricity supply by DSO according to energy law, the possibilities of use are proposed. Each possibility of use is analyzed when implementing the breaker function or the breaker/limiter function. The benefits are defined for a DSO and for a customer. The proposed uses are evaluated in terms of applicability and valid legislation in the Czech Republic. The result of this work is the summary of information about breaker/limiter function which is one of the new features in the implementation of smart metering. The function installation and the implementation of possibilities described in the thesis depends on the DSO decision.
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Differential protection of transformer.
Svoboda, Miloslav ; Paar, Martin (referee) ; Toman, Petr (advisor)
This bachelor thesis is divided into several chapters, which consist of two main parts of the work, theoretical and practical. In the theoretical part the work deals with disorders of electric network, causes and limit of their adverse effects. Further it theoretically analyses the function of electrical protection, requirements for the protection , their basic elements. Then there is described the principle and function of instrument transformers and the differential protection of transformers. The practical part of the work deals with protection for a specific transformer. The proposal involves the calculation of three-phase short-circuit, the selection of differential protection, the proposal of instrument transformers and settings of the protection function.
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