National Repository of Grey Literature 25 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Protection functions of the REX 640 terminal in case of earth faults
Siegel, Josef ; Bukvišová, Zuzana (referee) ; Wasserbauer, Vojtěch (advisor)
This bachelor thesis deals with the protection, implementation and evaluation of test for fault condition indicators. Thesis focus on earth fault indicators. These protections must be able to evaluate earth faults in compensated, compensated with auxiliary resistor, unearthed and high-resistance earthed networks. Furthermore, part of the thesis is research of methods of earth fault detection, including their principles and function description.
Traction protection
Šüli, Nicolas ; Wasserbauer, Vojtěch (referee) ; Topolánek, David (advisor)
This bachelor’s thesis focuses on methods of protection for AC and DC traction systems. In thesis first deal with current state in traction, next with undesirable conditions and electrical protections. The work describes a draw in the program INKSCAPE two most often used traction power station with protection.
Extensible measurement socket placement optimalization with respect to the higher number of conductors
Šindler, Matěj ; Čepička, Martin (referee) ; Wasserbauer, Vojtěch (advisor)
In opening, this bachelor thesis is describing structure and basic block description of UniGear switchgear manufactured by ABB company. Then this thesis focus on current and voltage transformers and sensors often used in this type of switchgear. Main part of this thesis is dedicated to evolution and description of connector, used in connection solution of withdrawable metering unit with low-voltage compartment. Next part states the main requirements for new connector, that will replace current connector in future solution. In following part there is a list of different options for new connector with their biggest strengths and weaknesses pointed out. Then there is list of alternative placements for new connector. In final part is chosen and described new connector and its placement. This solution is valuated and backed up by created 3D models.
Utilization of SINCAL tool in the field of network protection
Rampák, Dominik ; Wasserbauer, Vojtěch (referee) ; Topolánek, David (advisor)
This bachelor thesis is describing the basics of using program PSS SINCAL for protection of distribution networks. The thesis is divided into 3 parts. The first part is describing basics and functions of the program. The second part is devoted to the moduls, work with moduls described in form of manuals. The last part is describing creation of test network and simulation of single-phase to ground short-circuit to verify selectivity of the protection devices.
Design of LV distribution network reconstruction within the long-term network development strategies
Navrátil, Stanislav ; Wasserbauer, Vojtěch (referee) ; Ptáček, Michal (advisor)
The aim of this thesis is to design a low voltage distribution grid. The thesis includes theoretical knowledge related to this topic. Great emphasis is placed on development strategies in the area of low voltage distribution networks. A practical part of the thesis is focused on analysis of the real low voltage distribution grid followed by designing reconstruction solution. This solution is based on technical standards ČSN, PNE and procedures used in ČEZ Distribuce, a.s. company. For this purpose computing software DAISY Bizon Projektant will be used.
Design of reconstruction the part of the LV distribution network including make the creation of Detail Design Documentation
Kubeša, Radek ; Wasserbauer, Vojtěch (referee) ; Bátora, Branislav (advisor)
This master’s thesis deals with problems associated with the design of LV distribution networks. In the theoretical part there are described, legislative requirements for the designer of distribution networks, overwiev of standards in which the designer should have oriented and programs used in practice to create design documentation. In the next part there are given requirements for the detail design documentation. Practical part of master’s thesis is devoted to design of reconstruction of distribution network in the given part of village. Appraisal of existing a newly design distribution network was done by calculating of stady state in the BIZON program. In the last part there is listed design documentation for construction in range for the smooth implementation of the project.
Operation of embedded cable lines into HV distribution grid
Černý, Tomáš ; Wasserbauer, Vojtěch (referee) ; Ptáček, Michal (advisor)
The thesis focuses on a section of cable line inserted into overhead high voltage power line. The essence is a description of the benefits, risks and impacts of the operation of such sections in terms of protection, transition processes. etc. The thesis also includes economical comparison of an acquisition and operating costs of both overhead and cable line. The topic of this thesis was given by ČEZ Distribuce a.s.
Measurement of three-wire transformer parameters
Kováč, Frederik ; Bukvišová, Zuzana (referee) ; Wasserbauer, Vojtěch (advisor)
Thebachelor’sthesisdealswithmeasuringsymmetriccomponentalimpedanciesofthree winding transformer. Thesis is divided into a theoretical and practical part. In theoretical part is described principle of transformer operation, its parameters, open-circuited and short-circuited measuring, measuring of zero-sequence impedance and connection schemes. Practical part deals with design of workplace in laboratory, description of used instruments and practical measurements with real connection schemes. For measuring parameters of three winding transformer is created a laboratory instruction manual.
Substation model with double busbar system
Kopáček, Petr ; Jurák, Viktor (referee) ; Wasserbauer, Vojtěch (advisor)
The goal of my Bachelor´s Thesis is to rebuild a single busbar medium voltage Switchgear substation model with two sections where one Switchgear cubicle represents the incoming breaker of the busbar section. Furtherly, the goal is to configure the model, test and put it into the operation for laboratory exercise. The base problems for model rebuild are described in the theoretical part which is followed by the description of rebuild for this particular case and solution of control and instruments interlocking configuration using CAP505 program. The updated drawings after the rebuild completion are attached. The conclusion of my Bachelor Thesis summarizes the problems identified during testing and their resolution. Few laboratory exercises are also included in the Thesis.
Partial discharge measurement of middle and high voltage cables
Pelikán, Luděk ; Wasserbauer, Vojtěch (referee) ; Krbal, Michal (advisor)
The main topic of this work is the analysis of the measurement of partial discharge measurements on high voltage cables. The thesis also deals with other measurements, including the measurement of the loss factor and the voltage retention and breakdown test. Part of the text describes the issue of partial discharge, its measurement by galvanic method and methods of elimination of disturbing influences that affect this method in terms of sensitivity and accuracy of the measured values. Thesis also describes the construction of the cables, their marking and the tests carried out on them. There is also a description of the cable terminals used for measuring, especially water terminals, which are designed for high voltages and which are carried out in the practical part of the thesis. The next part deals with problems prior to the commissioning of water terminals and their preparation for certain tests, including description and evaluation of the results of the measurements.

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1 Wasserbauer, V.
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