National Repository of Grey Literature 58 records found  beginprevious39 - 48next  jump to record: Search took 0.01 seconds. 
Model of a diesel-generator
Suchomel, Vít ; Ondrůšek, Čestmír (referee) ; Bárta, Jan (advisor)
This work deals with principles and methods of drive-train regulation. Furthermore it deals with simulation of drive train via Simulink in a program Matlab. The work is done in cooperation with Siemens Drasov. A created model will be used as an educational model for employees of company. The model will allow better and more graphic education. In the beginning part is drive-train generally descripted. Next part is especially about a synchronous generator. This work also explains a working principle of generator and excitation. There is a cooperation of generator with electrical network described and transformation of synchronous generator into a model of general electric machine showed, substitute scheme is in d, q coordinates deduced in the next part. There are simulations of different states of generator solved in a practical part of the work. At first there is simulation of generator’s load change by using the created model done and further there are simulations of short circuits in stator winding realized. Finally there are simulations of connecting the synchronous generator into infinite bus for ideal and unfavorable conditions done. All simulation models include lots of oscilloscopes, which allow time courses to display, currents, shaft’s revolutions, torques and so on.
Design of PMSG for micro hydro power plant
Skurka, Tomáš ; Ondrůšek, Čestmír (referee) ; Huzlík, Rostislav (advisor)
This bachelor’s thesis deals with a design and simulation of various implementation of the synchronous generator for a low-speed waterwheel. The construction of the generator was implemented as the radial synchronous generator with the permanent magnets on the rotor’s surface. In the introduction the reader gets familiar with the theory describing the construction of the synchronous generator with the permanent magnets intended for the small hydroelectric power plants. Within the thesis the author shows his own design of the generator and the optimization using the genetic algorithm. Next, three proposals with the predefined sheets are presented. Every single proposition of the generator was simulated in the software ANSYS Maxwell. Finally, the heat calculation was made for the certain designed variations of the generator.
Effect of the bearing shields stiffness and balance quality on synchronous generator vibration
Čepica, Vojtěch ; Hůlka, Jiří (referee) ; Lošák, Petr (advisor)
The main focus of my master thesis is the assessment of effects of the bearing shields stiffness and balance quality on synchronous generator vibration. The incentive of writing the thesis is the problematic situation, which is characterized by synchronous generator vibration. The aim of my thesis is to variate shields stiffness and to find out the dependence of vibration on stiffness during nominal speed. I have used the program ANSYS based on finite element method to solve this problem.
Operation of Parallelly Connected Synchronous and Asynchronous Generator to Off-grid Network
Seiml, Jan ; Paar, Martin (referee) ; Bartošík, Tomáš (advisor)
The main focus of this bachelor's thesis is the description of the properties of asynchronous and synchronous generator in off-grid network. There is explanation of control and regulation of off-grid networks, the behavior of generators and and resources in the network and their characteristics and the subsequent creation of a practical demonstration of island networks with synchronous and asynchronous generator.
Operation of Parallelly Connected Synchronous and Asynchronous Generator to Off-grid Network
Seiml, Jan ; Paar, Martin (referee) ; Bartošík, Tomáš (advisor)
The main focus of this bachelor's thesis is the description of the properties of asynchronous and synchronous generator in an isolated network. There is explanation of control and regulation of isolated networks, the behavior of generators and burdens in the network.
Design of a generator for small hydraulic power plant
Kvapil, Martin ; Vítek, Ondřej (referee) ; Huzlík, Rostislav (advisor)
This thesis concentrates on using the bladeless turbine Setur to supply an independent entity. The first part deals with the principle of working and construction of the given turbine. The second part comprises of a synchronic generator proposal for the given turbine. In the end of the thesis, a model of a proposed generator and its properties are simulated in the FEMM programme.
Utilization of local systems for power system regulation
Kostov, Jiří ; Geschwinder, Lukáš (referee) ; Bartošík, Tomáš (advisor)
Bachelor’s Thesis deals general information about methods of regulation of elektrification systems, including basic principles of regulation of frequency, regulation of voltage and regulation of reactive and active power. Work includes information about aggregate remote control system, power plants that participate on regulation and self device for regulation and controlling of reactive power. Work engages on new options in section of regulation and his requirements for distribution sites. Part of work deals information about renewable natural energy sources and his requirements for distribution sites.
Data Acquisition and Control System of Hydroelectric Power Plant Using Internet Techniques
Sattouf, Mousa ; Přikryl, Hynek (referee) ; Richter, Aleš (referee) ; Skalický, Jiří (advisor)
Vodní energie se nyní stala nejlepším zdrojem elektrické energie na zemi. Vyrábí se pomocí energie poskytované pohybem nebo pádem vody. Historie dokazuje, že náklady na tuto elektrickou energii zůstávají konstantní v průběhu celého roku. Vzhledem k mnoha výhodám, většina zemí nyní využívá vodní energie jako hlavní zdroj pro výrobu elektrické energie.Nejdůležitější výhodou je, že vodní energie je zelená energie, což znamená, že žádné vzdušné nebo vodní znečišťující látky nejsou vyráběny, také žádné skleníkové plyny jako oxid uhličitý nejsou vyráběny, což činí tento zdroj energie šetrný k životnímu prostředí. A tak brání nebezpečí globálního oteplování. Použití internetové techniky k ovladání několika vodních elektráren má velmi významné výhody, jako snížení provozních nákladů a flexibilitu uspokojení změny poptávky po energii na straně spotřeby. Také velmi efektivně čelí velkým narušením elektrické sítě, jako je například přidání nebo odebrání velké zátěže, a poruch. Na druhou stranu, systém získávání dat poskytuje velmi užitečné informace pro typické i vědecké analýzy, jako jsou ekonomické náklady, predikce poruchy systémů, predikce poptávky, plány údržby, systémů pro podporu rozhodování a mnoho dalších výhod. Tato práce popisuje všeobecný model, který může být použit k simulaci pro sběr dat a kontrolní systémy pro vodní elektrárny v prostředí Matlab / Simulink a TrueTime Simulink knihovnu. Uvažovaná elektrárna sestává z vodní turbíny připojené k synchronnímu generátoru s budicí soustavou, generátor je připojen k veřejné elektrické síti. Simulací vodní turbíny a synchronního generátoru lze provést pomocí různých simulačních nástrojů. V této práci je upřednostňován SIMULINK / MATLAB před jinými nástroji k modelování dynamik vodní turbíny a synchronního stroje. Program s prostředím MATLAB SIMULINK využívá k řešení schematický model vodní elektrárny sestavený ze základních funkčních bloků. Tento přístup je pedagogicky lepší než komplikované kódy jiných softwarových programů. Knihovna programu Simulink obsahuje funkční bloky, které mohou být spojovány, upravovány a modelovány. K vytvoření a simulování internetových a Real Time systémů je možné použít bud‘ knihovnu simulinku Real-Time nebo TRUETIME, v práci byla použita knihovna TRUETIME.
Stress, deformation and safety analysis of the generator stator loaded by nonhomogeneous temperature
Majdič, Petr ; Dobeš, Martin (referee) ; Vrbka, Jan (advisor)
This thesis deals with stress, strain and reliability analysis of synchronous generator stator including an inhomogeneous temperature field. Using the finite element method, stress and strain are calculated, and from these values safety against yield strength is determined, which is followed by the life calculation of the most stressed weld joint and the determination of its possible damage during the period required by the customer.
Creating a computational model for stress-strain analysis of parts of generator
Sedláček, Radek ; Fučík, Karel (referee) ; Návrat, Tomáš (advisor)
This thesis focuses on creating of a computational model for stress-strain analysis of parts of a generator. Computational model is parametric and it allows use of various geometric variants of the shaft and rotor lamination. Parametric computational model in APLD language is compiled in the attached sheet of software MS Excel after entering input values. After solving in software ANSYS 14.5 are results imported into MS Excel sheet for further post processing.

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