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Model of Stirling Engine in PSCAD
Gallo, Michal ; Kopička, Marek (referee) ; Radil, Lukáš (advisor)
This dissertation about the Stirling engine deals with the history and formation of the heat engine. At the beginning of this work, fundamental parts and their functions are described, elucidating the principle of operation explained by the thermodynamic cycle and subsequently comparing the ideal and the real Stirling cycle and last but not least provides various modifications whilst describing their differences. The mathematical model of the Stirling engine is processed by Schmidth’s theoretical analysis and thereafter is created in PScad v46. The process of creating a model is shown in one of the chapters of this dissertation. The results were taken into account in the design of 3D models in Inventor Professional by Autodesk. The work concludes with the evaluation of the computational model and its functionality as well as the documentation of the 3D model.
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Voltage profile regulation in Low-Voltage distribution systems
Koštialik, Marek ; Kopička, Marek (referee) ; Drápela, Jiří (advisor)
This paper deals with controlling the voltage profile in low voltage distribution networks. In the first part of the theoretical analysis is the solution view of inadequate elimination connecting renewable energy sources on distribution network. Subsequently, in a published review of factors representing the power quality in LV. The second part is a detailed search of the individual voltage regulators in consideration their specific solvability in LV. In the practical part will followed by the selection and realization of serial voltage regulator and consequently it´s experimental verification functions in low-voltage network.
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Model of electric energy storage with management system based on general assumptions
Sedlák, Miroslav ; Kopička, Marek (referee) ; Radil, Lukáš (advisor)
The accumulation of electricity as an issue is becoming more important and it’s importance is constantly growing. This is due to the fact that more renewable energy sources, mainly photovoltaic and wind power plants, are being incorporated into the electricity system, causing changes in the power grid performance. Changing in the behavior of consumers of electricity can cause further changes in the network. The ability for compensations of these changes in the power grid has just accumulation systems. This Thesis for Master’s Degree presents selected storage systems and ways in which energy can be stored. Further, in this work, a model of accumulation system with management based on general conditions will be created. This model will be tested and its behavior detected under the limit conditions.
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Model of electric energy storage with management system based on general assumptions
Sedlák, Miroslav ; Kopička, Marek (referee) ; Radil, Lukáš (advisor)
The accumulation of electricity as an issue is becoming more important and it’s importance is constantly growing. This is due to the fact that more renewable energy sources, mainly photovoltaic and wind power plants, are being incorporated into the electricity system, causing changes in the power grid performance. Changing in the behavior of consumers of electricity can cause further changes in the network. The ability for compensations of these changes in the power grid has just accumulation systems. This Thesis for Master’s Degree presents selected storage systems and ways in which energy can be stored. Further, in this work, a model of accumulation system with management based on general conditions will be created. This model will be tested and its behavior detected under the limit conditions.
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Electric networks with DC voltage up to 1000 V
Fiala, Martin ; Kopička, Marek (referee) ; Ptáček, Michal (advisor)
This master´s thesis deals with the proposal of DC low voltage network at a voltage level of 1000 V DC in Praskolesy u Mrakotina village. Direct distribution will be realized only at the terminal, which will power the village. Next part of this thesis is theoretical and its main focus is description of both DC and AC distribution systems. The proposed DC grid will use existing distribution grid. The thesis further describes the problems of long terminals in low voltage distribution systems and electrical installation in buildings. The result of this work is a comparison of the losses between AC and the proposed DC system. The last part deals with economical evaluation and technical solution for the proposed network variant, including their advantages and disadvantages.
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Cooperation between the inverter and grids in island operation
Urant, Tomáš ; Kopička, Marek (referee) ; Radil, Lukáš (advisor)
This thesis deals with the creation of models of non-volatile sources connected to the power system using power converters and their connection by filter or a transformer. Furthermore, the thesis will deal with the study of the problem of connecting a large number of these sources. Another area of interest is to determine the conditions under which these sources can be used to restore network voltage after a previous outage. In the PSCAD program we will create inverter models (6 pulse, 12 pulse and one phase). In the next step, a network model will be created, where the individual sources will be connected and, in the end, we will simulate the situations. The output of the thesis is to determine the behavior of the largest number of static sources in the system and thus to contribute to the knowledge about the possibilities of safe and stable operation of non-volatile energy sources in the power system.
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Islanding Detection
Bárta, Jan ; Ptáček, Michal (referee) ; Kopička, Marek (advisor)
The bachelor thesis discusses islanding in electric power system and various methods for its detection. The thesis contains a list and description of legislation concerned with islanding, description of few selected islanding detection methods, and their comparison. The practical part of the thesis consists of simulations of several detection methods performed in the virtual environment of PSCAD and their evaluation.
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Model of microgrid with energy storage
Halás, Andrej ; Drápela, Jiří (referee) ; Kopička, Marek (advisor)
This thesis describes the operation , characteristics and operating conditions of microgrid with energy storage , provides insight into the benefits of using listed concepts . The first part deals with the description of microgrid systems, distribution and shows examples of its use. The second part describes individual elements of the storage systems, energy production and energy transformation used in microgrids . The third part describes the work with PSCAD software. The main goal is to design a micro grid model in PSCAD and validate its function.
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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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