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Overhead Line Protection against Climatic Effects
Sýkora, Martin ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
The outdoor overhead lines are influenced by additional load pressure of wind and frost. These can have adverse reaction on outdoor conduction of the electric power. My bachelors' report deals with separate climatic effects and possibilities of their resolution. It it also concentrates on removing the negative influences caused particularly by wind and on the possibilities of liquidation of the frost that had already originated.
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Autonomic fault recorder designed for a distribution transformer station MV/LV
Gaborčík, Michal ; Drápela, Jiří (referee) ; Topolánek, David (advisor)
This master’s thesis deals with realization of fault recorder designed for a distribution transformer station. In theoretical part is created research about operation of distribution transformer stations and about analytic methods, which gives bases for fault detection in power network. The practical part consists of design and realization of fault recorder in LabVIEW interface using CompactDAQ measurement platform. Purpose of this recorder is monitoring and recording of voltage and current waveforms on secondary side of transformer station during the fault in high voltage network. Principle of fault detection is primarily based on level monitoring of voltage negative symmetrical component. Fault recorder has been successively optimized and the final version is presented in this thesis. At the end functionality of designed system is evaluated on simulated fault in a model of high voltage network.
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Energy meter testing by test set CMC 256plus
Jurka, Tomáš ; Topolánek, David (referee) ; Toman, Petr (advisor)
The thesis provides a reader with a brief overview of the basic methods for measuring active electric quantities, development and types of energy meters. Some of the standards related to the energy meters are also included. Then follows the description of tests concerning both electrome-chanical and electronic meters of accuracy class number two. The thesis also includes a brief overview of energy meter testing devices from other producers. The next section describes test set OMICRON CMC 256plus and Test Universe program. The main part of the thesis consists of the scheme and the implementation of laboratory work for testing the energy meters with test set OMICRON CMC 256plus.
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Short Circuit Calculation of MV Grid
Knápková, Dagmar ; Topolánek, David (referee) ; Toman, Petr (advisor)
This bachelor’s thesis deals with the faults in the distribution networks, focusing on shortcircuits as the most common and the most signiĄcant types of faults. The thesis is divided into theoretical and practical part. In the theoretical introduction, describes the types of faults in distribution networks with a focus on the short-circiuts, their causes, and the impact on distribution networks. Follows a description of the time course of short-circuit currents, short-circuit calculation simpliĄcation assumptions, the formula for calculating the impedance of the various elements of the short-circuits schema and the calculation methods of short-circuit currents in accordance with ČSN EN 60909-0. In the practical part, there is an example of the calculation of simple network conĄguration. Follows an analysis of the real network, including the analysis of the method of operation and the selection of appropriate method for the calculation of the short-circuit. After that are carried out practical calculations short-circuit conditions in four places on the network, and three diferent types of short circuits. For one-phase short-circuit is subsequently carried out the distribution of currents in a parallel branch of the distribution lines. At the conclusion of the bachelor’s thesis is caried out evaluation the results and analysis of the data obtained by calculation.
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Earth fault locator testing on the model of unsymmetrical lines
Kohůt, Miroslav ; Orságová, Jaroslava (referee) ; Topolánek, David (advisor)
This master’s thesis is about earth fault locator testing on the model of unsymmetrical lines. The introductory part of thesis describes the function of the selected locator, mainly for the used calculation algorithm of fault location, options setting of fault locator and connection of the locator to the network. Master’s thesis in its practical part deals, with the setting fault locator for a particular test system on the model of the MV line and implementation of selected testing on the model unsymmetrical lines. The first part of the testing is focusing on verify the accuracy locator on an unsymmetrical line. The second test is then designed for obtaining the most accurate information on the distance of the fault, which fault locator can give. The final part is focused on verification algorithm for more accurate calculation of the fault location.
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Proposal of new locality electrification
Foltýn, Petr ; Hájek, Ladislav (referee) ; Topolánek, David (advisor)
This master’s thesis is concerned with the proposal of new locality electrification. There are 59 detached houses. The thesis is divided into theoretical part and computational part. In the theoretical part, there are all documents necessary for the successful proposal of the electrification. In the computational part is drafted distribution substation, high voltage power cable, proposal of low voltage power cables and protection. Each part is made for two versions (for the degree of electrification A and for the degree of electrification C) and recorded in cadastral maps. The proposal of distribution substation and high voltage power cable is made by traditional method - all calculations are processed by the designer. Low-voltage power cables and protection are implemented in a computer program Sichr (version 11.01) OEZ company.
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Design of photovoltaic power plant for flat house
Holuša, Martin ; Topolánek, David (referee) ; Morávek, Jan (advisor)
The aim of this bachelor thesis is to develop a design of a photovoltaic power plant for a given flat house. The theoretical part deals with the basic components of a photovoltaic power plant, its legislation, the possibilities of supplying electricity to other entities and the creation of variant concepts of the photovoltaic power plant itself. In the practical part, the concepts are economically evaluated using a parameterizable form and for the selected variant is created project documentation for its implementation.
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Load Flow Solution of a 110kV Network
Tauš, Vladimír ; Vaculík, Petr (referee) ; Topolánek, David (advisor)
Content of this thesis is theoretic introduction to the steady state of network, theoretic analysis of methods, which serves for calculation of steady state of network such as Gauss Seidel iterative method or Newton Raphson modified method and economy in the energetics, concretely fixation of costs of the power line and calculation of the optimal time of building up the recuperative power line. This thesis includes calculation of steady state of requested network with normal trouble-free network and for criterion (n-1), their analysis and design of recuperative precaution.
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Evaluation of possibilities for connection of wind farm Drahany 45 MW to 110 kV network
Gregr, Tomáš ; Opat, Jaroslav (referee) ; Topolánek, David (advisor)
This Master's thesis is focused on connecting of new power sources into electrical network, particularly, the steady state and allowed voltage variation in network nodes, which occur in steady state before and after connection of a new power source into distribution network, with regard to valid legislation. The new power source in question is the new wind farm Drahany with active power of 45 MW, which should be connected into distribution network 110kV, operated by distribution company E.ON. The aim of this work is to find the most suitable connection point of a wind farm into distribution network, considering transmission capacity of individual electric lines and voltage variations in network nodes, as well as Drahany wind farm's investor's expenses on construction of a connection line to connection point and the distribution network's operator's expenses on modification of the connection point. Also, methods of calculating of electric networks in steady state are described in this paper, particularly, linear calculations, because these are needed for the calculations in E-vlivy program, in which the possible options of Drahany wind farm's connection into network 110 kV, in various places, were modeled. The description of the E-Vlivy program is also included in this paper. The E.ON company's materials form the basis for this Master's thesis, which will later serve as one of the documents needed for Drahany wind farm’s connection point evaluation into distribution network 110 kV.
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