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Proposal of the reconstruction of a distribution network in a specific area
Richter, Miroslav ; Mrvová, Dana (referee) ; Blažek, Vladimír (advisor)
The dissertation describes several types of low and high voltage distribution networks including their implementation in specified location with regards to the reliability and quality of electric power supply. The distributions networks are classified according to ways of cable routing, distribution line voltage levels as well as according to types of network interconnections. The high and low voltage distribution networks are further categorized based on used cable types, where, more attention is paid to insulated lines used in the Czech Republic, low voltage lines called „AES“ and „PAS“ high voltage lines used more and more during the distribution network reconstruction. Attention is also given to the description of used methodology for the calculation of network performance stability. An individual part of the dissertation is devoted to a low voltage distribution network proposal in the village of Kovalovice. Based on performed analysis of distribution network conditions, several reconstruction versions were proposed with the help of „KASI“ software, the description of which is also included. The proposed versions are further analysed for both, technical and economical aspects and is selected most suitable version of the distribution network.
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Short Circuit Currents in the Sokolnice 400 kV Switching Station with Direct 400/110 kV Transformation Applied
Vojtěch, Pavel ; Špaček, Jaroslav (referee) ; Blažek, Vladimír (advisor)
The destination of this Bachelor´s Thesis is to explore short circuit currents for voltage level 400 kV in the switching station Sokolnice before year 1995 and after this year, when came to installation of the convertor T402 and to voltage direct 400/110 kV transformation applied. The Thesis is detecting at relation as for three-phase short circuit do for single-phase short circuits, for 400/220/110 kV primary transformation variation in voltage and for variation 400/110 kV, the change which came after connection of the convertor T402. In base of this calculation will be explored the short circuit resistance rating switching station in agreement with parameters ordered by the comp. Inc. ČEZ Prague.
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Stabilized operation of a 110 kV power line
Leinweber, Luboš ; Paar, Martin (referee) ; Blažek, Vladimír (advisor)
My work is dealing with parameters long high voltage (vvn)110kV with wanted output parameters(voltage rating , cos? , aktive power and size of power line) namely in theoretic part as well as in practic part , which I made from required parameter values of power line. At first I did the approximate calculation by reserve power lines ( T , ? , ? , Steinmetz), by short power line , idle power lines and after that I made perfect conclusion and elaboration by the help of lines. I described these kind of calculation in the theoretic part. I compared the results and I determinated which method was te best.
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Proposal of the reconstruction of the distribution network in a specific area
Novák, Vojtěch ; Mrvová, Dana (referee) ; Blažek, Vladimír (advisor)
This diploma thesis is concerned with reconstruction of distribution network in Hruba Vrbka. The diploma thesis is divided in two parts. For better understanding to this issue, the first theoretical part is shortly dedicated to the history of electrical power system, to the several types of distribution network of low voltage and high voltage and their utilization in the area, considering the reliability and the quality of delivery of the electric energy. In this thesis there is mentioned division of distribution grids according to placing of cable lines, according to voltage and according to type of grid connection. Next part of this work is dedicated to the description of overhead lines and cable lines and their characteristics. For the proper concept of the grid we should know some characteristics of the electric line’s proposal: mechanical strength, warming, voltage drop, efficiency, degree of safety and provision of delivery. In the end of the theoretical part there are described methods for calculation of grid’s steady state as a linear task and also non-linear task, elimination of the balancing node, the iterative method, the reduction of external power take-off nodes and the solution of the steady state of the network through the direct current model. The second part of the diploma thesis is concerned with the calculation of the steady state in the village Hruba Vrbka. In this part is also described the KASI program which was used for the calculation of the grid’s steady state. Firstly low voltage grid’s balance in Hruba Vrbka was found out and evaluated and then there were proposed some solutions of the reconstruction for the grid improving. The suggested options of the reconstruction are considered from technical and economical point of view and the best solution is chosen. For this solution there is suggested the protection through program SICHR 9. In the end of this diploma thesis there is checked the load of the high voltage line.
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Stabilized operation of a 110 kV power line
Leinweber, Luboš ; Špaček, Jaroslav (referee) ; Blažek, Vladimír (advisor)
My work is dealing with parameters long high voltage (vvn)110kV with wanted output parameters(voltage rating , cos , aktive power and size of power line) namely in theoretic part as well as in practic part , which I made from required parameter values of power line concretely by direct-axis reactance and shunt admittance. At first I did the approximate calculation by reserve T-networks ( T , , , Steinmetz), by short T-network , idle T-networks and after that I made perfect conclusion and elaboration by the help of lines. I described these kind of calculation in the theoretic part. I compared the results and I determinated which method was te best.
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Increase the Rated Voltage of the Vehicle's Circuit - Study
Škrla, Milan ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
Baccalaureate work themed Study voltage boost seat power control nets motor vehicles is document analysing actual fulfilment seat power control nets motor vehicles. S consideration on historical evolution, actual form and possible to dissemination seat power control nets are in work rectified conditions and groundwork for possibility heighten voltage rating. Size input appliances for purposes baccalaureate work were to be timed on motor - car lower middle class. Record from metering served for theoretic proposal source text system intended for increased surface explicit tension plumbed vehicles.
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Increase the Rated Voltage of the Vehicle's Circuit - Study
Horák, Richard ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
The point of this work is evaluate the parameters of automotive electric system and according to these properties choose suitable norm of higher voltage, propose conception of system and with analyst calculation suggest basic granary parameters of higher voltage. This calculation is enclosed. In the work is mentioned a historical development of required escalation in system and therewith connected changes of specified levels of system tension. As an exemplification of escalation calculus hereof electrical equipment, installed onto motor powered vehicle, are mentioned in attachment schema's of four vehicles Škoda Auto a.s.
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Stabilized operation of a 110 kV power line
Leinweber, Luboš ; Špaček, Jaroslav (referee) ; Blažek, Vladimír (advisor)
My work is dealing with parameters long high voltage (vvn)110kV with wanted output parameters(voltage rating , cos , aktive power and size of power line) namely in theoretic part as well as in practic part , which I made from required parameter values of power line concretely by direct-axis reactance and shunt admittance. At first I did the approximate calculation by reserve T-networks ( T , , , Steinmetz), by short T-network , idle T-networks and after that I made perfect conclusion and elaboration by the help of lines. I described these kind of calculation in the theoretic part. I compared the results and I determinated which method was te best.
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Stabilized operation of a 110 kV power line
Leinweber, Luboš ; Paar, Martin (referee) ; Blažek, Vladimír (advisor)
My work is dealing with parameters long high voltage (vvn)110kV with wanted output parameters(voltage rating , cos? , aktive power and size of power line) namely in theoretic part as well as in practic part , which I made from required parameter values of power line. At first I did the approximate calculation by reserve power lines ( T , ? , ? , Steinmetz), by short power line , idle power lines and after that I made perfect conclusion and elaboration by the help of lines. I described these kind of calculation in the theoretic part. I compared the results and I determinated which method was te best.
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Increase the Rated Voltage of the Vehicle's Circuit - Study
Škrla, Milan ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
Baccalaureate work themed Study voltage boost seat power control nets motor vehicles is document analysing actual fulfilment seat power control nets motor vehicles. S consideration on historical evolution, actual form and possible to dissemination seat power control nets are in work rectified conditions and groundwork for possibility heighten voltage rating. Size input appliances for purposes baccalaureate work were to be timed on motor - car lower middle class. Record from metering served for theoretic proposal source text system intended for increased surface explicit tension plumbed vehicles.
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