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Testing of Directional Earth Fault Protections Using The Experimentally Obtained Fault Records
Holub, Martin ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
Master thesis Testing of Directional Earth Fault Protections Using the Experimentally Obtained Fault Records deals with the protective functions of earth fault protections during earth faults in compensated medium voltage distribution network and their testing options. At the beginning of the thesis we charakterize operation of medium voltage distribution system in general. We begin with definition and characteristics of earth fault and its compartmentalization by the type of the fault, size of the transition resistance and duration. We also mention grounding methods of node winding transformer on medium voltage distribution network and we describe the most common of them in detail, i.e. network grouded through the arc suppression coil and its operation with automatic switching auxiliary resistor. In this part of the thesis we discuss the localization of the earth fault using passive static methods in compensated systems, which include wattmetric, admittance and conductance method. In next section we deal with the fault records stored in COMTRADE file format, its structure and all elements of its configuration and data file. We create and describe an example of converting ADF file format, recorded by Yokogawa oscilloscope fault recorder, into COMTRADE file format using Microsoft Excel program and M-File created in the MATLAB program. In the practical part we introduce workspace devices and software, which includes secondary testing equipment OMICRON CMC 256plus and its software OMICRON Test Universe with Advance Transplay test module, we further describe multifunctional earth fault protection RYo from PROTECTION & CONSULTING, s. r. o. and machine terminal REM 543 from ABB and their protective functions. The last part describes the actual testing of parallel connected earth fault protection with COMTRADE fault records by Advance Transplay test module in the OMICRON Test Universe. In the conclusion we describe evaluation of the suitability of each protective functions of earth fault protection in a variety of sizes the transition resistance at the earth fault location.
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Statistical Evaluation of Entrance Exams
Tihlaříková, Jana ; Mezník, Ivan (referee) ; Kropáč, Jiří (advisor)
This master’s thesis deals with statistical evaluation of the entrance exams at the Faculty of Business and Management of Brno University of Technology, especially the evaluation of the quality of applicants of bachelor study branch “Tax Advisory“. The thesis also includes the forecast of number of applicants, who will apply for the Faculty of Business and Management of Brno University of Technology in the future.
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Distance Practical Education of Electric Machines
Šelepa, Jan ; Huzlík, Rostislav (referee) ; Hájek, Vítězslav (advisor)
This work contains scheme of practical point of distance training in the field of electric machines. It consits of three parts nessesary for consistence of entire work. In first part we have a description of data networks used to communication with virtual laboratory. Further there is a list and description of software fit for our study. These are programs capable of controling measurements, e.g. . LabView, Control Web, TestPoint, ScopeWin etc. In second part we have selection of measurment experiment. As experiment i measured the effectivness of three-phase transformer. The values archieved during the experiment where recorded and processed into form of graph and tables. In last part i used processed results to create functional simulation of measurement using MS Excel software. Further i calculated characteristics for equivalent circuit diagram of the transformer, that where equivalent to the real values measured in laboratory.
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Data journalism aimed by Datablog IHNED.cz
Hrbková, Nikola ; Láb, Filip (advisor) ; Kasík, Pavel (referee)
Now when information is abundant, practice of Data Journalism is quickly becoming a core technique of the 21st century newsrooms. The diploma thesis "Data Journalism aimed by Datablog IHNED.cz" is focused on introducing Data Journalism as a genre responding to the changes in the society and the technology development. The theoretical part concerns with the history of the subject, the workflow of Data Journalism in the newsrooms and the limitations; such as inappropriate business models, difficult process of collecting data or the lack of training. The main goal of the research is to map the work of the Czech data team in the IHNED.cz and compare the results with the work of teams in Australia. The research methods are combination of quantitative and qualitative analyses. The main source of information are interviews conducted with data journalists from the Czech Republic and Australia. On top of that the research gives deeper understanding of how the integration of data journalists in the newsrooms affect the way journalism can support the existence of media organizations and contribute to the public good. The last part offers predictions of the future of Data Journalism.
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Data journalism aimed by Datablog IHNED.cz
Hrbková, Nikola ; Láb, Filip (advisor) ; Kasík, Pavel (referee)
Now when information is abundant, practice of Data Journalism is quickly becoming a core technique of the 21st century newsrooms. The diploma thesis "Data Journalism aimed by Datablog IHNED.cz" is focused on introducing Data Journalism as a genre responding to the changes in the society and the technology development. The theoretical part concerns with the history of the subject, the workflow of Data Journalism in the newsrooms and the limitations; such as inappropriate business models, difficult process of collecting data or the lack of training. The main goal of the research is to map the work of the Czech data team in the IHNED.cz and compare the results with the work of teams in Australia. The research methods are combination of quantitative and qualitative analyses. The main source of information are interviews conducted with data journalists from the Czech Republic and Australia. On top of that the research gives deeper understanding of how the integration of data journalists in the newsrooms affect the way journalism can support the existence of media organizations and contribute to the public good. The last part offers predictions of the future of Data Journalism.
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Statistical Evaluation of Entrance Exams
Tihlaříková, Jana ; Mezník, Ivan (referee) ; Kropáč, Jiří (advisor)
This master’s thesis deals with statistical evaluation of the entrance exams at the Faculty of Business and Management of Brno University of Technology, especially the evaluation of the quality of applicants of bachelor study branch “Tax Advisory“. The thesis also includes the forecast of number of applicants, who will apply for the Faculty of Business and Management of Brno University of Technology in the future.
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|
|
Distance Practical Education of Electric Machines
Šelepa, Jan ; Huzlík, Rostislav (referee) ; Hájek, Vítězslav (advisor)
This work contains scheme of practical point of distance training in the field of electric machines. It consits of three parts nessesary for consistence of entire work. In first part we have a description of data networks used to communication with virtual laboratory. Further there is a list and description of software fit for our study. These are programs capable of controling measurements, e.g. . LabView, Control Web, TestPoint, ScopeWin etc. In second part we have selection of measurment experiment. As experiment i measured the effectivness of three-phase transformer. The values archieved during the experiment where recorded and processed into form of graph and tables. In last part i used processed results to create functional simulation of measurement using MS Excel software. Further i calculated characteristics for equivalent circuit diagram of the transformer, that where equivalent to the real values measured in laboratory.
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Testing of Directional Earth Fault Protections Using The Experimentally Obtained Fault Records
Holub, Martin ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
Master thesis Testing of Directional Earth Fault Protections Using the Experimentally Obtained Fault Records deals with the protective functions of earth fault protections during earth faults in compensated medium voltage distribution network and their testing options. At the beginning of the thesis we charakterize operation of medium voltage distribution system in general. We begin with definition and characteristics of earth fault and its compartmentalization by the type of the fault, size of the transition resistance and duration. We also mention grounding methods of node winding transformer on medium voltage distribution network and we describe the most common of them in detail, i.e. network grouded through the arc suppression coil and its operation with automatic switching auxiliary resistor. In this part of the thesis we discuss the localization of the earth fault using passive static methods in compensated systems, which include wattmetric, admittance and conductance method. In next section we deal with the fault records stored in COMTRADE file format, its structure and all elements of its configuration and data file. We create and describe an example of converting ADF file format, recorded by Yokogawa oscilloscope fault recorder, into COMTRADE file format using Microsoft Excel program and M-File created in the MATLAB program. In the practical part we introduce workspace devices and software, which includes secondary testing equipment OMICRON CMC 256plus and its software OMICRON Test Universe with Advance Transplay test module, we further describe multifunctional earth fault protection RYo from PROTECTION & CONSULTING, s. r. o. and machine terminal REM 543 from ABB and their protective functions. The last part describes the actual testing of parallel connected earth fault protection with COMTRADE fault records by Advance Transplay test module in the OMICRON Test Universe. In the conclusion we describe evaluation of the suitability of each protective functions of earth fault protection in a variety of sizes the transition resistance at the earth fault location.
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