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Compensation of reactive power to avoid its overflow into the MV system
Jurák, Viktor ; Ptáček, Michal (referee) ; Orságová, Jaroslava (advisor)
This master thesis is focused on analysis of reactive power flow in LV and MV networks. In the first part there is a definition of reactive power and description of individual parts of electrical networks that contribute with their reactive power to distribution network. The second part is dedicated to calculation of power flow in simulation software PSS® Sincal where on numerical models of network different types of network configuration are tested and consequently its influence on reactive power flow is evaluated. A more detailed analysis is dedicated to reactive power compensation in networks with distributed generation equipped with Volt-Var regulation and its possible negative mutual influence. This thesis also includes general recommendation on the basis of network simulation analysis concerning installation of compensating systems in distribution transformer station.
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Potential Production of Electric Energy by Photovoltaic Power Stations on the Roof Installation in Municipality up to 3000 Residents
Štefek, Martin ; Ptáček, Michal (referee) ; Paar, Martin (advisor)
The aim of this bachelor thesis is to determine the maximum technical potential of photovoltaic roof power stations of the municipality with up to 3,000 inhabitants. The thesis proposes its own procedure enabling a quick determination of the maximum size of the installation for each house based on the ČSN EN 15316-4-3 standard. The proposed methodology is applied on the municipality Moravany u Brna. For overall estimation of the photovoltaic potential of the municipality, other methodologies using only statistical data are applied and compared with proposed methodology. Last section of the thesis deals with the estimation of the load caused by a large number of small photovoltaic roof installations.
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Thermal behaviour model of the photovoltaic module
Ludányi, Róbert ; Morávek, Jan (referee) ; Ptáček, Michal (advisor)
This thesis deals with the observation of changes in behavior of photovoltaic cell due to changes in tempertature. In the beginning of the thesis is the desscription of sun as the primary source of energy for photovoltaic systems. The thesis also includes explanations of basic concepts in photovoltaic area and also a theoretical design for the calculations of thermal behaviour of photovoltaic cell in time. The result is a functional mathematical model, which is simulated in a simulation program PSCAD.
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Development of the complex simulator of the solar irradiance and its cooperation with the PV module
Petrov, Roman ; Vrána, Michal (referee) ; Ptáček, Michal (advisor)
The main point of this thesis is the extension of the complex solar radiation simulator, the creation of new functionalities, and the cooperation of this complex simulator with the PV power plant. This work builds on the work done in the area of solar radiation modeling. The thesis deals with the continuation, or improvement of some shortcomings, removing shortcomings, such as fixing the beginnings and ends of the simulation, correcting the calculation of sunrise and sunset, but also adding different types of clouds, combinations of different preset cloud situations, or data input, and more. These deficiencies are found in the bachelor's thesis "Complex Simulator of the solar irradiance", and PSCAD is the main tool in this work. Another important point of this work is the realization of the simulation where an improved solar radiation simulator works in cooperation with a model of a photovoltaic panel or a PV power plant, respectively. It has different operating states created in PSCAD. These include, for example, cloud crossings, both over the entire power plant and only partial. In addition, there are experiments that prove the fact that the direction of the incoming cloud plays a role in the power of the PV power plant.
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Load model
Lašo, Matej ; Ptáček, Michal (referee) ; Kopička, Marek (advisor)
This thesis deals with power quality and load modeling. The issues of power quality, principles of load model creation and various types of loads and their principles are described and explained in this thesis. Various software and its main adventages in power systems modeling are described and various load models and simulations in PSCAD program are created and described at last.
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Project of Autonomous Heating Source
Pejcl, Jiří ; Ptáček, Michal (referee) ; Radil, Lukáš (advisor)
The diploma thesis deals with design of a suitable heat source for heating and hot water. There are dealt with operational costs of different types of heat sources, which are compared with one another. The next part is the implementation of specific proposal of the heat source - heat pump ground/water with deep wells and measuring system. The last part describes measuring several operating modes of the heat pump.
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Simulation of small wind power plant with Savonius-Darrieus rotor
Hořava, Pavel ; Radil, Lukáš (referee) ; Ptáček, Michal (advisor)
This master‘s thesis deals with the simulation of small wind power plant with Savonius-Darrieus rotor. On the base of the actuator disk theory the performance of modeled power plant is predicted in theoretical part and the power coefficient as well. The process of designing the wind model is also described in this theoretical part. The practical part of this thesis is dedicated to the creating a model of DS300 vertical axis hybrid wind turbine in Matlab/Simulink. This model was used to generating of the power curve of modeled wind power plant and for the computing of power and total produced energy during an average and above-average day as well. The whole thesis is enclosed by evaluating of obtained results.
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Ecological problems energetics CR
Mahdal, Vlastimil ; Ptáček, Michal (referee) ; Matoušek, Antonín (advisor)
This project presents the current state of power engineering, power resources in the Czech Republic and the impact of power resources on the environment. The first chapter describes the nature of the power engineering of the Czech Republic and the structure of primary energy sources, the next chapter present the current state of electricity, there is also described the structure of instaled capacity, consumption and production of electrical energy. The following section describes the impact of the power stations on the environment and their current status in the Czech Republic. The practical part provides information of calculating emissions using emission factors for power stations of company ČEZ, a.s. and about the storage of nuclear waste. The last chapter is dedicated to reducing carbon dioxide emissions in the European Union and describes measures in the Czech Republic for reducing these emissions.
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Increasing the electric power of photovoltaic power plant connected to distribution network in a given area
Klobučník, Jozef ; Novotný, Jan (referee) ; Ptáček, Michal (advisor)
This bachelor’s thesis deals with increase of the power of photovoltaic power plant Horné Túrovce. There are two proposed possibilities how to increase the power. The theoretical introduction of the bachelor’s thesis is focused on the description of the main parts of the photovoltaic power plants. There are the technologies of the photovoltaic cells production as well as components of the photovoltaic system stated. There is further description of the photovoltaic panel’s function, principle and types of inverters, the impact of the photovoltaic power plants on the distribution network. There is the working procedure of connecting the new source and the technology of the power output to the distribution network described. The bachelor’s thesis provides technical description of the selected photovoltaic power plant Horné Túrovce and technical proposal to increase the output of photovoltaic power plant Horné Túrovce designed for both variants. The fourth section deals with methods of verifying connectivity of the photovoltaic power plants to the distribution networks and with the bad impacts on the distribution network. In the last part is a practical calculation to verify the possibility to connect production to the distribution network after the increase of the power for both variants and calculation of the bad impacts on the distribution network.
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Design of autonomous energy source with photovoltaic and wind power sources
Bršťák, Jan ; Bartošík, Tomáš (referee) ; Ptáček, Michal (advisor)
The ability to accumulate electric power is one of the most important and the most developing field in power engineering. Contemporary problems of electric power production from photovoltaic and wind sources are their varying outputs set by the weather conditions. These disadvantages can cause various problems (particularly there are supplied outputs into distributional system that runs for on-grid systems). The hybrid system (photovoltaic + wind sources) and the accumulation of electric power solve the problems of their output fluctuation because they complement each other. This Bachelor’s Thesis is focused on the basic description of photovoltaic and wind sources and their electric power accumulation. One of the chapters is intended for the description of well-known and used electric power accumulators. There is also a general suggestion of cooperating photovoltaic and wind sources and its evaluation in the relationship to the distributional system. In the conclusion, there are evaluations of the hybrid system (photovoltaic + wind sources) used in praxis. There are also mentioned their advantages and disadvantages.
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