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Original title in Czech: Silnoproudá elektrotechnika a elektroenergetikaFEKTAbbreviation: PP-SEEAcad. year: 2010/2011
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
Main goal of the work is an research and development of special encapsulated motors both for water pumps powered by frequency converter. Special consideration will be especially dedicated to research within the meaning of magnetic circuit optimisation in magnetic losses point of view. The result of project solution should be a modern induction machine at high technical performance, which meets the customers requirements at maximum rate.
Tutor: Hájek Vítězslav, prof. Ing., CSc.
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.
The work will be focused on elctromagnetic design optimization using artificial inteligence to get the best solution according to the desired requirements.
Tutor: Ondrůšek Čestmír, doc. Ing., CSc.
Topic is focused to problems of use of sophisticated methods for selecting wiring not only technical solution based on the price, but also basis of many other criteria such as comfort, service, life, etc. The theme reflects the recent rapid developments in the system wiring, control technology but also communications equipment. The focus of work should be discussion of wiring systems from a global perspective, where the objective evaluation and selection of appropriate system wiring is no longer possible to common approaches, given the magnitude of such systems and their mutual ties. It offers the use of some of the methods of multi-criterial analysis (MCA), which affected extensiveness solution. The result of the work should be software design for evaluation of technical solutions to wiring, which would also include the functions of feedback on the effectiveness of solutions, utility value, price, etc., which would also serve as a knowledge base. Thus conceived solution is a high use of the assumption in practice, and also in other fields of electrical engineering.
Tutor: Toman Petr, prof. Ing., Ph.D.
Aims of work: Asynchronnous drive dynamics analysis for field oriented control and direct torque control strategy. Formulation of theoretical limits of asynchronnous drive dynamics for mentined control strategies. Field oriented control strategy optimization for dynamics.(realization, validation)
Tutor: Klíma Bohumil, doc. Ing., Ph.D.
Aim of this work 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 main aim of the thesis is the development of the method of calculation of simultaneous faults-short circuits and open conductors.
Tutor: Haluzík Evžen, doc. Ing., CSc.
The work will be focused on the calculation of static and dynamic parameters of permanent magnet synchronous machines.
The work will be focused on up to date design procedures of single phase induction motors. Calculation using Finite Element Methods and Artificial Inteligence.
Tutor: Kuchyňková Hana, doc. Dr. Ing.
Methodology of low voltage circuit breaker design with respect to thermal, electrodynamic and pressure conditions usin finit element/volume method. Experimental verification of the developed design.
Tutor: Aubrecht Vladimír, prof. RNDr., CSc.
Development of experimental methods for identification of electric and non-electric quantities under model conditions in LV power switching devices. Subsequent application of proposed and verified methods and procedures on real conditions in LV power switching laboratory. The objective is to expand knowledge of electric arc properties under conditions in very high-powered electric, magnetic and pressure fields.
Tutor: Vávra Zdeněk, doc. Ing., CSc.
Mathematical model of switched power inverters with transformer. Control criteria formulation. Parallel, cascade and state control algorithms properties and comparison. Balanced power distribution, synchronization and output current ripple minimization in parallel operation of inverters.
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.
The aim of the work is to develop independent source of electrical energy for measurement and data transmission from rotary elements. Primary energy sources may be of different physical origin.
This topic is focused to the examination of individual parts failures related to it's operation features.
Tutor: Veselka František, doc. Ing., CSc.
Current standards require a relatively large construction hrmosvodného equipment. This complicates the project of medical devices. Often requirements for hromosvodná device can not slnit with regard to any strong magnetic fields in lightning strikes and their impact on expensive medical equipment. The work is to evaluate the current status and outline the appropriate solutions in theory and practice.
Tutor: Matoušek Antonín, doc. Ing., CSc.
The work will be focused on application of laser holographic methods in diagnostics of electrical machines and appliancess.
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.
Ever-increasing share of renewable electricity to the connected system has some effect on the quality of electricity supplied to consumers (the size of voltage, frequency, harmonics, etc.). The work is to evaluate the current state methods for calculating the steady state of the network (suitable iterative method) to connect new sources and outline additional procedures and options in connection with the EU legislation, the rules for parallel operation of resources and energy flows in interconnected systems.
The main goal of work is an research development and innovation of DC motors series with permanent magnet, which should attain better technical and economical parameters. Design and calculations of DC motors will be verified by measuring and testing of samples and prototypes.
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 with embedded underground cables. 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.
Topic deals with a problem of utilisation of modern computer technologies in a branch of power engineering control. It reflects fast development in control systems and automation systems, communication technology but also in artificial intelligence. Work will be focused on disquisition about power systems behaviour from a global point of view, where the standard routines of calculations, control etc. could not be applied yet due to extensiveness of such systems and their reciprocal relationships. Utilisation of some artificial intelligence disciplines is possible for nondeterministic tasks solving, decision processes and control, but also passed events evaluation, in instance power failures caused by extensiveness faults etc.
Tutor: Baxant Petr, doc. Ing., Ph.D.
The theme is focused on the issue of storing various information primarily from the lighting technology in a structured database, which will be applicable as a source of information for any expert system. The aim of this work is to establish a uniform methodology of decomposition of knowledge and facts, which are part of various data sources (internet, catalogs, books, laws, standards, etc.) and efficient storage of databases (relational, object, post-relational, etc.). The database would be used for the design and evaluation of lighting systems. The issue is in progress and very particularly in the current context of increasing volume of processed data that is no longer possible to effectively manage any other way. Resolving objectives would help the efficient use of components of lighting systems for efficient use of electricity in lighting and improving the quality of lighting systems.
The project aims to develop a comprehensive theory of mathematical models of electric lamps, which can be used in the calculation of electrical networks, as well as calculations on the technical parameters of light illumination. Currently, there are a wide range of light sources, but their computer models are not known to have been adequately described and available for the current simulation and modeling programs, such as Dynasty and SIMULINK. These include Discharge lamps, which are relatively complicated dynamic system, whose model is based on knowledge of the theory of electric arc, thermodynamics, light engineering. Will be important in particular models discharge light sources that will address issues such as power control of resources, the emergence nonharmonic currents, interference effects of interharmonic components on light sources parameters, etc.
Tutor: Drápela Jiří, prof. Ing., Ph.D.
The topic is aimed at the analysis of present method for testing of insulation of devices for 110 kV and 22 kV distribution networks. The solver will deal with insulation testing methodology under electric stress of high ac, dc and impulse voltages in test laboratories, dry and wet tests, pollution test, corona and voltage distribution tests on insulators. With respect of this tests the measurement of insulation resistance, dielectric response analysis, recovery voltage and partial discharges, must be analyzed as well. This work assumes introduction to relevant national and international standards for above mentioned tests, which the technical project of HV laboratory should be based on.
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 thermal plasma is being widely technologically employed. One of the possible plasma sources is the plasma torch. It produces the plasma by means of axially blasted electrical arc. The aim of this work is to suggest mathematical-physical model of arc and to compare with simplified model. The values measured on plasma torch will be used for verification of the created model.
Tutor: Lázničková Ilona, doc. Ing., Ph.D.
Thesis is focused to nanotechnologies that are used in electromechanical systems, especially with the slide contact. Thesis will continue in extensive knowledge gained in this field of study.
The work will be focused on ventilation problems of electrical machines including ventilation system optimalization.
Ever-increasing share of renewable sources (wind farms and solar power plant big performance) that attach to the power system affects its random changes of power supply operation and stability of the entire power system. Work to assess the current situation and based on analysis of mix in the electricity system of the Czech Republic and their regulatory capacity for a percentage of each type of production facilities (thermal, nuclear, hydro, wind, photovoltaic), taking into account international cooperation.
- transient phenomenon in power system - overvoltage - overvoltage level when switching of the no-load line
Tutor: Blažek Vladimír, doc. Ing., CSc.
The work will be focused on identification of static and dynamic parameters and linear and nonlinear mathematical models of special traction electrical machines with permanent magnets.
This topic is focused to the measurement of small distances and deformations of the rotating parts of electrical machines. This phenomenon effects machine operating conditions.
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. Influence of various spectral intervals and various molecular species on the radiative heat transfer in the arc plasma. Development of computer code for calculation of absorption coefficients of given thermal plasmas.
This topic is realted to the sliding contact issue in special electromechanical systems which is oprating in dynamic operating conditions with high nominal current, voltage, rotation speed, speed and defined environment parametres.
Research and design Of DC power converters with a transformer. High power up to 100kW. Regular distribution of output currents at the parallel connection to one load. Digital control algorithms. Power circuits.
Tutor: Patočka Miroslav, doc. Dr. Ing.
Parameters identification of the asynchronous motor substituting circuit in the form of T-circuit, gamma-circuit, inverse gamma-circuit. Sensitivity analysis of the asynchronous motor features on the parameters of the substituting circuit. Experimental verification at common types of asynchronous motors. New mathematical methods of the analysis and synthesis of the AC motors winding.
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. - Specification of possibility CAD systems cooperation with Kinematics analysis
The topic of fault simulation in power systems is still very actual. The main aim of the thesis is development of correct models of power transformers and simulation of transmission of the faults between voltage levels for different types of tranformer winding connection.
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.
Analysis of standard diagnostic methods including application of up to date aids to computation.