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Design of a 22 kV network in the Lipno area after the integration of the new 110/22 kV transformer station
Žižlavský, Jakub ; Koudelka, Jan (referee) ; Ptáček, Michal (advisor)
This diploma thesis deals with the design of a new 110/22 kV substation in Horní Planá. The substation design addresses, for example, the issue of reducing the load of surrounding power lines from 110/22 kV substations, reducing the size of short-circuit ratios in the surrounding system, reliability and continuity of supply, etc. Furthermore, loads of individual outgoing feeders from the surrounding substations are analyzed, in case they will be connected to a new substation. Following this, the work also addresses the related new decay points of the lines, which are determined by calculation and simulation in the Grizzly program. The simulation results could be used to compare the current load status of individual lines and contribute to the assessment of the possible benefits of both the new substation and the implementation of other modern technologies for faster and more efficient measurement and handling during operating and fault conditions.
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Modelling and Simulations of Electromechanical Transients is Electrical Power Systems
Gromotovič, Ivan ; Bátora, Branislav (referee) ; Koudelka, Jan (advisor)
This work deals with the issue of evaluating transient stability in the simulation program PSCAD. Factors affecting transient stability were analyzed on a single-machine SMIB model. The results of this analysis confirmed the theoretical assumption that for more accurate results of the analysis of transient stability, it is necessary to consider the mentioned factors. A short circuit was simulated on the IEEE9 test model and subsequently the load angles of the generators were monitored using various methods. The method of reference of the largest generator in the system proved to be a more suitable method for the assessment of relative load angles from the results of the analysis.
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History of protection relays
Šafl, Pavel ; Koudelka, Jan (referee) ; Bukvišová, Zuzana (advisor)
The bachelor thesis deals with mapping the origin and history of electrical pro-tections. The work outlines the circumstances and the new types of protection. It expla-ins and introduces problems encountered in the development and operation of historical protections. On the overcurrent protection AB31, AT31 and REF615, the tripping characte-ristic was measured to evaluate and compare modern digital protection and historical electromagnetic protection. Dependent protection AB31 has been tested and measured for its dependent characteristics and the AT31 protection has been checked for short-circuit current capability. Both of these protections were compared and evaluated with the REF615 digital protection. The measurement results and calculations are processed into well-arranged tables and graphs that are part of the work. The last part of this thesis is the selection of suitable protections for describing and making small exposures.
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Transmission system of the Czech Republic after 2040
Gabrys, Dominik ; Koudelka, Jan (referee) ; Radil, Lukáš (advisor)
This master thesis is focused on issue transimission system of Czech republic after 2040. Thesis is divided in two parts, teoretical and practical. Teoretical part contains present trends of transmission sytem and the most probably changes in the future decade. Practical part contains simulation of Czech transmission system and various scenarios with idea of open source.
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Analysis of Frequency Measurement and RoCoF in Simulation Programs
Koudelka, Jan ; Máslo, Karel (referee) ; Orságová, Jaroslava (advisor)
The thesis deals with the issue of measurement of frequency and its derivative (RoCoF) in simulation software. The aim of the thesis was to compare results obtained in three different pieces of software (PSS/E, PSCAD, MODES). 2 disturbances were simulated in a grid model IEEE 39 bus system and values of frequency and generator speed were assessed. The results obtained in different software are diverse. This is influenced by method of modelling of synchronous generator and algorithm of calculation of frequency. Findings are important for future investigation of power system transients in simulation software and also point to potencial incorrect assassement of frequency in protective relays.
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Project Management Tool for Android Platform Tablets
Koudelka, Jan ; Kouřil, Jan (referee) ; Škoda, Petr (advisor)
This thesis is dedicated to the issue of project management and its support using software tools. It is focused on analysis of existing solutions and designing a new mobile application for Android platform. It summarizes basic principles of making mobile applications for Android OS. Designed application uses some properties of cloud computing for scaling and synchronizing data easily.
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Frequency Stability Assessment of Continental Europe Synchronous Area on Equivalent Model
Macejko, Stanislav ; Hába, Tomáš (referee) ; Koudelka, Jan (advisor)
This thesis deals with frequency stability, system disturbances and their dynamic simulation. The aim of the work was to create a single-machine equivalent and single node model for the simulation of the system disturbance from January, 8, 2021 in MODES network simulator. The thesis describes in detail created models and achieved simulation results, which are the frequency deviation waveforms. The simulation results are compared with the actual behaviour of the power system. The thesis further discusses the use of the models and suggests further improvements.
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Heat loss of tap-off units of a busbar trunking system
Koudelka, Jan ; Krbal, Michal (referee) ; Zezula, Michal (referee) ; Lázničková, Ilona (advisor)
The thesis deals with the issue of design of tap-off units of a busbar trunking system in point of view of a heat loss. At first the issue of busbar trunking systems as an alternitive to wires is presented in the thesis. Then there is a deep analysis of a design of a tap-off unit, including the issue of calculating the temperature-rise. For the design, a computer program was created, whose presentation makes up the cardial part of the thesis. Not only its parts are described, but also there is written how to work with it and which datas it uses. At last results of the design of the tap-off unit in the program are compared to the results of the type test of the temperature-rise.
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Wireless Sensor Network with Static Topology for Building Monitoring
Koudelka, Jan ; Žák, Jakub (referee) ; Samek, Jan (advisor)
This bachelor's thesis is focused on realization of wireless sensor network (WSN) for buildings monitoring and real-time obtaining of data. Just for work on this project the micaZ sensor nodes have been chosen. The main task is to create WSN with a static topology and some communications mechanism. That network consists of several nodes, and there is a special one called base station. It also has a special function, different from the others. The function is that the base station is collecting data from all of the nodes and sending them to a computer through an USB port. In addition to designing the network topology the other tasks are to implement a comunication protocol and to create computer application and application for sensor nodes. Data will be visualised in text and graphical form. Moreover there are some information about the simulation tool called TOSSIM which allows testing applications without having a physical access to micaZ sensor nodes.
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