|
|
Life management of power oil transformer
Čechová, Karolína ; Froehling, Kenneth (referee) ; Sedláček, Pavel (advisor)
Pro pochopení významu procesu řízení životnosti výkonových olejových transformátorů, je nutné si nejdříve uvědomit jejich roli v elektrizační soustavě. Používají se především ke zvýšení a snížení napěťových úrovní v přenosové a distribuční soustavě dle aktuálních potřeb. Nespolehlivost výkonových olejových transformátorů může způsobit narušení stability dodávky elektrické energie, což představuje značné finanční a technické ztráty pro společnosti, které spravují tento typ zařízení. Z tohoto důvodu jsem se rozhodla napsat práci, která poskytuje přehled o procesu řízení životnosti, popsáním jeho ekonomických přínosů spolu s technickými diagnostikami, které napomáhají ke zjištění vznikajících poruch během provozu výkonových olejových transformátorů. Hlavním záměrem této práce je popsat a dokázat důležitost procesu řízení životnosti a využití diagnostických metod ke sledování parametrů transformátoru, které slouží jako prostředek ke zjištění možných poruch. Praktická část je zaměřena na navržení vhodných diagnostickým metod pro měření zvolených parametrů vybraného výkonového olejového transformátoru. Poté je provedena analýza zvolených parametrů a na základě jejích výsledků, je určen celkový stav vybraného výkonového olejového transformátoru.
|
|
|
INTEGRATED SOLUTION OF DIAGNOSTICS OF PRODUCTION EQUIPMENT IN THE CZECH ENERGY INDUSTRY
Cvešpr, Pavel ; Szabó,, Radek (referee) ; Kratochvíl, Petr (referee) ; Hammer, Miloš (advisor)
This dissertation thesis is concerned with the diagnostics of the main production facilities in Czech power engineering with a focus on its integrating role in the process of gaining, saving and processing information for the purpose of evaluating the technical state of the operated facilities and the plan to manage their lifetime. It is divided into two parts, theoretical and practical. The theoretical part presents the conclusions of examination of the needs of involved workers in the areas of diagnostics, maintenance and expert assessment of technical state of equipment. These conclusions were formulated based on the completed analysis of the current status ("as - is" analysis) of performing diagnostics of systems operated in the technological units of both nuclear and classical power engineering. The monitored equipment involves electrical installations and machinery, steel and building constructions, measuring instruments and vibrodiagnostics. Based on the analysis results, process diagrams are created for the solution of partial tasks. The analysis of the proposed solution for problems in question ("should - be" analysis) includes a design of the fundamental scheme of the data model for a software solution and a design of data flows from the individual data sources. The following part presents an application layer which includes a detailed description of major functionalities. Further, important activities and procedures are described that are necessary to evaluate the technical state of equipment. The practical part deals with the implementation of the LTO suite software product in the environment of power engineering in Czech Republic, specifically within ČEZ, a.s.. The LTO suite functionality is demonstrated in this part of the thesis by screens recorded within the LTO suite individual modules, which work above the actual data. It starts with the initial screen for configuration of displayed data, continues to present examples of the equipment register, planning, processing and saving of information collected through the diagnostic activities over to the module of integration – analytical layer, which is designed for evaluation of the technical state of equipment at the entered date with a reporting output. The thesis also includes the chapters on "Aims of the Study" and "Conclusion". The key chapter presents the "Benefits of the Study", whose overview describes the original results of the research as well as those applicable also outside the power engineering area.
|
|
|
Life-Time Management of Process Devices in Industrial Practice
Lošák, Pavel ; Klemeš,, Jiří (referee) ; Ing. Zdeněk Jůza, Ph.D. MBA (referee) ; Vejvoda, Stanislav (advisor)
This dissertation examines life-time management of process and energetic devices in industrial practice, mainly in the area of steam power plants. Furthermore, it focuses on frequent damage mechanisms occurring in this area. It summarizes basics of damaging mechanisms occurring in the process industry area, their monitoring, evaluation and prediction. In the area of steam power plants, the main emphasize was placed on cumulative damage mechanisms. Within the dissertation, mechanisms of creep, fatigue, and their combinations were assessed. Major European standards were examined in order to discuss the amount of contained conservatism and their usability. Subsequently, attention was paid to the methods applicable for creep and fatigue combination evaluation. In the next step life-time monitoring and evaluation standard was discussed. The diagnostic software was created which includes creep, fatigue and creep-fatigue combination evaluation according to valid standards. For online life-time evaluation was proposed refined analytical solution for stress and strain calculation. To further extend the life-time management, the dissertation describes oxide scale damaging together with its evaluation and implementation into diagnostic software. The proposed software is extended by the material module which on the basis of defined materials allows easy and effective usage of material characteristics. For the purpose of refining life-time prediction accuracy, experimental device was schematically described. In addition, the device should be also able to verify used equations. Furthermore, the dissertation includes solution to industrially oriented cases. Firstly, a steam generator with damaged pipes was analyzed, afterwards damaged transferring pipeline. Further analyses deal with U-tube heat exchanger and its damaging. The causes of damage were discovered and corrective measures were proposed. The dissertation concludes with the summarization of potential activities for subsequent research in examined area.
|
|
|
Life management of power oil transformer
Čechová, Karolína ; Froehling, Kenneth (referee) ; Sedláček, Pavel (advisor)
Pro pochopení významu procesu řízení životnosti výkonových olejových transformátorů, je nutné si nejdříve uvědomit jejich roli v elektrizační soustavě. Používají se především ke zvýšení a snížení napěťových úrovní v přenosové a distribuční soustavě dle aktuálních potřeb. Nespolehlivost výkonových olejových transformátorů může způsobit narušení stability dodávky elektrické energie, což představuje značné finanční a technické ztráty pro společnosti, které spravují tento typ zařízení. Z tohoto důvodu jsem se rozhodla napsat práci, která poskytuje přehled o procesu řízení životnosti, popsáním jeho ekonomických přínosů spolu s technickými diagnostikami, které napomáhají ke zjištění vznikajících poruch během provozu výkonových olejových transformátorů. Hlavním záměrem této práce je popsat a dokázat důležitost procesu řízení životnosti a využití diagnostických metod ke sledování parametrů transformátoru, které slouží jako prostředek ke zjištění možných poruch. Praktická část je zaměřena na navržení vhodných diagnostickým metod pro měření zvolených parametrů vybraného výkonového olejového transformátoru. Poté je provedena analýza zvolených parametrů a na základě jejích výsledků, je určen celkový stav vybraného výkonového olejového transformátoru.
|
|
|
Life-Time Management of Process Devices in Industrial Practice
Lošák, Pavel ; Klemeš,, Jiří (referee) ; Ing. Zdeněk Jůza, Ph.D. MBA (referee) ; Vejvoda, Stanislav (advisor)
This dissertation examines life-time management of process and energetic devices in industrial practice, mainly in the area of steam power plants. Furthermore, it focuses on frequent damage mechanisms occurring in this area. It summarizes basics of damaging mechanisms occurring in the process industry area, their monitoring, evaluation and prediction. In the area of steam power plants, the main emphasize was placed on cumulative damage mechanisms. Within the dissertation, mechanisms of creep, fatigue, and their combinations were assessed. Major European standards were examined in order to discuss the amount of contained conservatism and their usability. Subsequently, attention was paid to the methods applicable for creep and fatigue combination evaluation. In the next step life-time monitoring and evaluation standard was discussed. The diagnostic software was created which includes creep, fatigue and creep-fatigue combination evaluation according to valid standards. For online life-time evaluation was proposed refined analytical solution for stress and strain calculation. To further extend the life-time management, the dissertation describes oxide scale damaging together with its evaluation and implementation into diagnostic software. The proposed software is extended by the material module which on the basis of defined materials allows easy and effective usage of material characteristics. For the purpose of refining life-time prediction accuracy, experimental device was schematically described. In addition, the device should be also able to verify used equations. Furthermore, the dissertation includes solution to industrially oriented cases. Firstly, a steam generator with damaged pipes was analyzed, afterwards damaged transferring pipeline. Further analyses deal with U-tube heat exchanger and its damaging. The causes of damage were discovered and corrective measures were proposed. The dissertation concludes with the summarization of potential activities for subsequent research in examined area.
|
|
|
INTEGRATED SOLUTION OF DIAGNOSTICS OF PRODUCTION EQUIPMENT IN THE CZECH ENERGY INDUSTRY
Cvešpr, Pavel ; Szabó,, Radek (referee) ; Kratochvíl, Petr (referee) ; Hammer, Miloš (advisor)
This dissertation thesis is concerned with the diagnostics of the main production facilities in Czech power engineering with a focus on its integrating role in the process of gaining, saving and processing information for the purpose of evaluating the technical state of the operated facilities and the plan to manage their lifetime. It is divided into two parts, theoretical and practical. The theoretical part presents the conclusions of examination of the needs of involved workers in the areas of diagnostics, maintenance and expert assessment of technical state of equipment. These conclusions were formulated based on the completed analysis of the current status ("as - is" analysis) of performing diagnostics of systems operated in the technological units of both nuclear and classical power engineering. The monitored equipment involves electrical installations and machinery, steel and building constructions, measuring instruments and vibrodiagnostics. Based on the analysis results, process diagrams are created for the solution of partial tasks. The analysis of the proposed solution for problems in question ("should - be" analysis) includes a design of the fundamental scheme of the data model for a software solution and a design of data flows from the individual data sources. The following part presents an application layer which includes a detailed description of major functionalities. Further, important activities and procedures are described that are necessary to evaluate the technical state of equipment. The practical part deals with the implementation of the LTO suite software product in the environment of power engineering in Czech Republic, specifically within ČEZ, a.s.. The LTO suite functionality is demonstrated in this part of the thesis by screens recorded within the LTO suite individual modules, which work above the actual data. It starts with the initial screen for configuration of displayed data, continues to present examples of the equipment register, planning, processing and saving of information collected through the diagnostic activities over to the module of integration – analytical layer, which is designed for evaluation of the technical state of equipment at the entered date with a reporting output. The thesis also includes the chapters on "Aims of the Study" and "Conclusion". The key chapter presents the "Benefits of the Study", whose overview describes the original results of the research as well as those applicable also outside the power engineering area.
|
guest ::
