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Original title in Czech: Silnoproudá elektrotechnika a elektroenergetikaFEKTAbbreviation: PP-SEEAcad. year: 2009/2010
Programme: Electrical Engineering and Communication
Length of Study: 4 years
Profile
The goal of the postgradual doctoral (PhD) study is the education for scientific work in the area of power electrical engineering and power systems. Graduates of PhD find occupation either as scientific or research workers including industrial development, either as universty teachers and in higher manager functions as well
Key learning outcomes
PhD-graduate obtains high theoretical knowledge and will learn to solve complicated scientific and technological problems by oneself PhD-graduate is ready for further professional rise with a high degree of adaptivity Graduates of PhD find occupation either as scientific or research workers including industrial development, either as universty teachers and in higher manager functions as well
Occupational profiles of graduates with examples
The graduate obtains broad knowledge of subject of high power engineering. The knowledge is build mainly on theoretical background of the subject. Moreover the graduate will obtain deep special knowledge aimed in direction of his/her thesis. The graduate will be able to perform scientific and/or applied research based on up to date theoretical knowledge. The graduate will be able to organize and lead a team of researchers in the studied subject.
Guarantor
doc. Dr. Ing. Miroslav Patočka
Issued topics of Doctoral Study Program
Regarding dynamic development of alternative power sources mutual cooperation of such sources is frequently aksed question nowadays. The aim of this disertation thesis is to design energy system compounded of more cooperating alternative power sources focusing on optimization of energy and economic balance. For veryfying hypothesis there is suggested usage of some simulation software and then compilation of physical analog.
Tutor: Mastný Petr, doc. Ing., Ph.D.
Aims of Thesis: - to analyse the losses and efficiency theoretically and experimentally for the individual machine groups, - to solve certain areas of losses which have been little explored until now - e.g. additional losses, establishing of mechanical losses and the like. -the final goal of the work is the research and development of a new generation of small electrical machines with optimized (increased) efficiency and improved characteristics.
Tutor: Hájek Vítězslav, prof. Ing., CSc.
The following work is focused on the problem of electrical machines .Current experience with application of thin coat are supposed to be used.
Tutor: Veselka František, doc. Ing., CSc.
Calculation od simultaneous faults-short circuits and open conductors.
Tutor: Haluzík Evžen, doc. Ing., CSc.
Doctoral thesis is focused on design and optimization of electric machine as an aircraft engine. The electric machine should be fed by hydrogen fuel cells. The doctoral thesis is related to planned MPO project "Application of VUT 001 Marabu for hydrogen fuel cells propulsion".
Tutor: Ondrůšek Čestmír, doc. Ing., CSc.
Thesis is focused on the possibilities of connecting small power sources to the supply network and evaluation of its influence on the reliability of eletrical power supply regarding its flukiness. The thesis results in the design of system precautions and conditions for the operation of small power sources in supply network.
Electric machines with axial magnetic flux are going to be very atractive for electric vehicle drives. The aim of PhD research is the construction and optimization of such machine. The research is with support of Research Center MSM 0021630516.
The interruption of phase conductor in isolated or compensated networks is fault which is very complicated to identify. The aim of work is analysis of electrical values during this fault and proposal of methodology of identification of interruption of phase conductor in real MV networks.
Tutor: Toman Petr, prof. Ing., Ph.D.
Aims of Thesis: - the main goal of work is an research and development of DC motors, which should attain better technical and economical parameters, - the solution of magnetic circuit, usage of modern magnetic materials and parts, analytic solution of electronic control systems, construction and technical preparation of prototype, - result of project should be in increase of life service and reliability, better possibilities of regulation and dynamic proprieties and increase of efficiency.
This topic is focused on methods used to calculate flashover rates of overhead distribution lines and its subsequent applying in insulation co-ordination projects of distribution network. A lightning stroke can originate an overvoltage which can cause either a failure in the affected line or propagate along the line and damage other equipment. Insulation flashovers of overhead distribution lines can be produced by one of the following causes: the discharge strikes ground close to the line, being able to induce a voltage greater than the dielectric strength, the flash strikes a phase conductor either, the flash strikes a shield wire or a pole.
Tutor: Orságová Jaroslava, doc. Ing., Ph.D.
Tutor: Baxant Petr, doc. Ing., Ph.D.
To prolong a range of an electric vehicle it is important to utilize all possibilities. One of the possibility is to generate electric energy from dampers. The aim of the PhD research is to construct a linear generator including control utilizing energy of damper. The research is supported by Research Center MSM 0021630516.
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Tutor: Skalický Jiří, prof. Ing., CSc.
Power generation using renewable power sources and preferably at point of demand is certainly way to satisfaction of ever-increasing need for the environmental protection. Nevertheless, operation of such power generation units leads to physical-technical-economical problems like hardly specifiable power supply reliability, huge time irregularity of the power supply for example under varying climatic conditions, generation of distorted voltages, etc. Thesis is focused on modeling and simulation of the following type power units: combustion engine-induction generator, wind turbine-induction generator, Photovoltaic generator-power inverter, etc. The simulation should be performed for their connection to a representative low and middle voltage power grid, with evaluation of their influence on the voltage characteristic for each power grid node. Cumulative effect of the distributed power units over the power grid is significant as well. The problem is a part of research at Department of Electrical Power Engineering supported by the grant projects. More information: drapela@feec.vutbr.cz.
Tutor: Drápela Jiří, prof. Ing., Ph.D.
In existing models used for network solution balanced parameters of a three-phase line and load are usually assumed, which - from the point of view of the possibility of fault location in a compensated network - has been found as quite an inaccurate attempt introducing a considerable error to localization methods and leading frequently to erroneous conclusions. Moreover, there are a lot of factors influencing the parameters of a real network, e.g. weather changes, changing value of earthing resistance, frequency change. Therefore the actual way of high voltage distribution network representation must be profoundly analyzed in order to find a new way corresponding as closely as possible to reality.
This thema is focused on a construction of power DC/DC converters with pulse transformers. Very high switching frequencies can be used in the converter using newly developed switching semiconductors based on carbide of silicon.
Tutor: Vorel Pavel, doc. Ing., Ph.D.
On-line parameter- identification of an induction motor used in a vector controlled drive with a frequency converter
Topic is focused to problems of survey amortisation of light sources caused by workaday usage. Every ageing is parametrical case and reflect always set of phenomena, which directly or indirectly influence it. With light sources the biggest problem is efficacy degradation and decreasing of functional reliability. Through the certain common characteristic existence, there is no exists serious methods, how to determine actual light sources parameter in a arbitrary time, during any simulated condition. Student would have a chance of evaluate at least any crucial factors and for example describe them by any mathematical model. Explorations of temperature influence, light source position influence, count of switching, over voltage and over current stresses influence etc.
Topic is focused on the analysis of current and voltage system of a TN-type distribution network supplying star-connected asymmetrical nonlinear load. This case is typical for large majority of LV distribution networks with single-phase non-linear appliances. Under certain but usual conditions, described load-type connected to the three-phase network can cause overloading of the neutral conductor, leading in a worst case to its disconnection. High impedance of the neutral conductor together with the load unbalance i.a. leads to change in phase to neutral voltages magnitude up to the phase to phase voltage. Consequently, increased and at the same time decreased phase to neutral voltages can cause temporary or permanent change in function of the connected appliances. However, up to now there is no uniquely determined and effective tool to protect customer's networks against the neutral conductor overloading and its disconnection. The aim of the thesis is on the base of the analysis to propose function principle of an appropriate protection and to realize its prototype. More information: drapela@feec.vutbr.cz.
Solution of energy balance in an arc plasma with respect to the radiative heat transfer. Application of partial chcaracteristics method to various kinds of arc plasmas. The main goal is a prediction of radiation intensity in the arc plasma with given temperature profile together with an analysis of radatove heat transfer role in the energy balance. Other results will be computed radial temperature profiles and E-I curves for a wall-stabilized arc burning in various gases.
Tutor: Aubrecht Vladimír, prof. RNDr., CSc.
Aim of this project is to analyze utilization possibilities of fuel cells and renewable resources. Analyze will assess both technical and economical aspects. According to analysis results there will be made design of static energy source. Design will include connection to distribution network.
Tutor: Matoušek Antonín, doc. Ing., CSc.
Aims of Thesis: - main goals is research and development of a new type of DC machine with permanent magnet excitation. The machine would be used as multifunctional one with expansion of a new type of gear box, - it is supposed a solution of magnetic circuit, magnetic field, induction in air gap of the machine, optimization by up-to-date numeric method (FEM), verification by analytical method, solution and total weight reduction of the machine, reduction of losses and increase of efficiency, - proposals and computations will be verified by measuring and tests made on samples and prototypes.
The operation of power systems on the limits of transmission ability brings the problems when transient phenomena come. This situation often causes black-out. The main aim of this work is analysis of methodology of power system simulation and extension this methodology about possibility of determination of critical operating states.
The common method of fault calculation is based on condition that the generators and the lines are symmetrical. Real MV netwoks are not operated as transposed that means for sharp calculation there is not possible to suppose that they are symmetrical. The main aim of the work is the analysis of electrical values during different types of fault in non-symmetrical networks and evaluation of asymmetry influence on accuracy of calculation according standards.
Tangential vibration of sliding contact effects significantly its work.Such state usually influences general state of the machine, particularly its sliding contact, bearing and commutator or ring.Simulating of the basic vibration in lab using the most advanced measuring technique and computer technology are considered to be used.
Aims of the thesis: - Search documentation on exchange data formats - Specification of possibility CAD systems cooperation with external databases. - Usage analasys of parametrs at Inventor for items and component database creation. - The creating of Library centrum at Autodesk Inventor.
Tutor: Kuchyňková Hana, doc. Dr. Ing.
The purpose of this project is to design optimal solution for Nuclear power plant restoration after serious break downs. The main stress will be on radioactivity leakage break downs, which caused electrical system black-out. Project deals with optimalization of dispatcher restoration actions under radioactive environment conditions. Several models will be done for situations with different intensity of radiation.
This project intent is to make extended analysis of different ways of grid connections. Different connection types have negative different impact on electrical energy quality in distribution networks. Connection impacts will be evaluated for each grid connection type. Connection variants will be analyzed according to distribution network characteristics and extended electrical power generation characteristics.
Work investigates the possibility of prolonging sliding contact service life of synchronous machines using elimination of shading and influence of DC quele . TIPS and new sliding contact are used. The subject is highly topical in industrial practice.
Regarding realizations of solar systems there appears a problem with excess of thermal power during summer months period. The aim of the dissertation thesis is to compile and optimize solar system model with usage of thermal energy for cooling. Part of the thesis is also energy analysis of designed system altogether with economic point of view.
Aims of the thesis: - Search documentation on ventilation and cooling of electric machines with radial channels - Modeling and simulation of ventilation using both CFD and reciprocal ventilation network methods - Modeling and simulation of thermal field using FEM and comparison of obtained results with those given by the method of reciprocal thermal network