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Protection for Generator Unbalance
Kuba, Petr ; Paar, Martin (referee) ; Orságová, Jaroslava (advisor)
The thesis deals with the problem of unbalance in generators and discusses various means of generator protection against the effects caused by this abnormal working condition. The general importance of the problem is described in the introductory part of this work. The theoretical section of the thesis contains an analysis of procedures applied to solve different types of unbalance by the help of the method of symmetrical components. As a central aspect of the topic, the causes of unbalance are examined. This investigation is realized together with a close insight into the diverse possibilities of unbalance reduction and, importantly, in respect the effects of negative sequence current on a generator and its components. The principles of generator protection against unbalance are described at the end of this section. In its practical part, this work deals with the procedure of protection setting and testing. The applied protection is an actual component of the REM 543 machine terminal as made by the ABB company. In order to facilitate the testing of the protection, we used the TZO3 electrical protection testing device provided by the EGÚ Brno, a. s. company. A summary of the most important information and measurement results can be found in the final part of the thesis.
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Stabilized operation and short-circuit conditions within E.ON 110kV power network supplied from Otrokovice 110kV switching station, during the period of 2012
Kuba, Petr ; Rampl, Martin (referee) ; Blažek, Vladimír (advisor)
This thesis deals with steady running and short-circuit conditions in the 110 kV network, E. ON, fed from 110 kV Otrokovice. Substation Otrokovice ensures system transformation from 400 kV to 110 kV system through three transformers. In order to increase reliability of power supply and improved economy is considered to bridge the transition from the operation of two transformers in bridge operations of the three transformers. However, this brings with it significant worsening of short-circuit conditions in the 110 kV network. The task of this work is to evaluate and compare the two variants of operation in terms of steady running and short-circuit conditions in the network at 110 kV and then implement operational and technical measures. The introduction describes the electricity system and its parts. The theoretical part of the paper discusses ways of dealing with steady running and short circuit conditions of long lines. Practical part will deal with applications of knowledge on the network. The conclusion summarizes the most relevant information and the results assessed both variants.
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Intensive composting technologies and their applications
Kuba, Petr ; Kučerík, Jiří (referee) ; Řezáčová, Veronika (advisor)
This bachelor thesis deals with intensive composting. The theoretical part of the thesis summarizes information about the composting process and the possibilities of sanitation. The ability to sanitize is essential in the treatment of potentially hazardous biodegradable wastes. The theory also includes information on the preparation of the stockpile, the appropriate composition of materials and the influence of other factors - temperature, aeration rate and turning. It also explains the differences between manual and intensive composting technologies, gives examples of technologies and explains their principles. Last but not least, the advantages of applying compost to the soil are mentioned. The experimental part is devoted to the Multiferm device and the tests of the composting process carried out on this unit. The tests aim to find the optimal parameters for the whole composting process and to ensure the sanitation process. Although the parameters are influenced by several factors, the compost sanitation process is achieved in one of the tests.
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Protection for Generator Unbalance
Kuba, Petr ; Paar, Martin (referee) ; Orságová, Jaroslava (advisor)
The thesis deals with the problem of unbalance in generators and discusses various means of generator protection against the effects caused by this abnormal working condition. The general importance of the problem is described in the introductory part of this work. The theoretical section of the thesis contains an analysis of procedures applied to solve different types of unbalance by the help of the method of symmetrical components. As a central aspect of the topic, the causes of unbalance are examined. This investigation is realized together with a close insight into the diverse possibilities of unbalance reduction and, importantly, in respect the effects of negative sequence current on a generator and its components. The principles of generator protection against unbalance are described at the end of this section. In its practical part, this work deals with the procedure of protection setting and testing. The applied protection is an actual component of the REM 543 machine terminal as made by the ABB company. In order to facilitate the testing of the protection, we used the TZO3 electrical protection testing device provided by the EGÚ Brno, a. s. company. A summary of the most important information and measurement results can be found in the final part of the thesis.
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Stabilized operation and short-circuit conditions within E.ON 110kV power network supplied from Otrokovice 110kV switching station, during the period of 2012
Kuba, Petr ; Rampl, Martin (referee) ; Blažek, Vladimír (advisor)
This thesis deals with steady running and short-circuit conditions in the 110 kV network, E. ON, fed from 110 kV Otrokovice. Substation Otrokovice ensures system transformation from 400 kV to 110 kV system through three transformers. In order to increase reliability of power supply and improved economy is considered to bridge the transition from the operation of two transformers in bridge operations of the three transformers. However, this brings with it significant worsening of short-circuit conditions in the 110 kV network. The task of this work is to evaluate and compare the two variants of operation in terms of steady running and short-circuit conditions in the network at 110 kV and then implement operational and technical measures. The introduction describes the electricity system and its parts. The theoretical part of the paper discusses ways of dealing with steady running and short circuit conditions of long lines. Practical part will deal with applications of knowledge on the network. The conclusion summarizes the most relevant information and the results assessed both variants.
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Te Deum in a Bohemian music of the 18th century, edition of selected compositions, analysis
KUBA, Petr
The goal of this thesis is observing the functions that the setting of the text Te Deum laudamus had throughout the musical history, approximately since the fifteenth century. It examines the occasions for which the Te Deum was written by important composers of their times. The study focuses on Czech eighteenth-century music, addressing the lack of research in this period. Works of two important Czech composers of Classicism, Jan Zach and Vojtěch Jírovec, were chosen for edition, which consists in transcribing the works into today{\crq}s clefs and presenting them in scores. The study further deals with the form and style of the selected works.
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Emergentní systémy
Kuba, Petr ; Rosický, Antonín (advisor) ; Horný, Stanislav (referee)
Tato práce se zabývá sociálními komplexními systémy a jejich vztahem ke globalizaci společnosti. Mezi komplexní systémy patří biologické, fyzikální, chemické a sociální systémy, které se vyznačují určitými shodnými charakteristikami. Jednou z vlastností těchto systémů je emergence, která označuje určité vlastnosti objevující se až na úrovni celého systému. Cílem této práce je charakteristika komplexních systémů obecně, vysledování emergentních jevů v sociálním systému lidské společnosti jako celku a v jeho částech a jak tyto jevy přispívají ke globalizaci.
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Information system architecture change managent process
Kuba, Petr ; Svatá, Vlasta (advisor) ; Ošmera, Jiří (referee)
For the runtime phase of automated information system lifecycle is typical a frequent change of system quality requirements. Only systems that can adapt to these requirements are successful in its environment. The system change can be each time of different extensive. If it is necessary for satisfaction of new requirements to add, remove or change some system components and its relations than we talk about system architecture change. This action is so large-scale that it is very risky to implement it without appropriate control and management. This essay addresses these changes and its management. Main phases of the process and its activities are proposed. The suggestion is based on the development process of new systems and available literature from this area. The target of the essay is to offer a certain framework for the change process management. Introduction to iformation system architecture is the first part of the essay. The last part is then concerned in a practical example of information system architecture change and its evaluation.
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