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Original title in Czech: Silnoproudá elektrotechnika a elektroenergetikaFEKTAbbreviation: PP-SEEAcad. year: 2015/2016
Programme: Electrical Engineering and Communication
Length of Study: 4 years
Accredited from: 25.7.2007Accredited until: 31.12.2020
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
Thema is focused on analysis methods of turning-on and turning-off processes of power switching transistors. A research in the field of current sensors with a bandwith at least 150 MHz is a part of the work. Next to the theoretical design of these sensors an experimantal proof of accuracy of output signals will be required. An application in power circuits with IGBTs, MOS-FETs and extremely fast SiC MOS-FETs is expexted.
Tutor: Vorel Pavel, doc. Ing., Ph.D.
The aim of the Ph.D. thesis is to create complex kinematic and dynamic model of low voltage switchgear. The thesis will be mainly focused on action of tripping units that use thermal and electromagnetic effects of the current on switching and contact system of a device. Experimental verification of the model and recommendation for design optimalization of the device.
Tutor: Bušov Bohuslav, doc. Ing., CSc.
With increasing number of DC power network related applications, necessity of the power/voltage quality assessment in those DC Power Systems can be expected. The aim of the work is to develop DC voltage quality indices starting from DC traction systems and AC public distribution systems voltage quality assessment practice. The theme takes a part of a research project in cooperation with K M B systems company. More information: drapela@feec.vutbr.cz.
Tutor: Drápela Jiří, prof. Ing., Ph.D.
Diagnosis of insulating state of MV and HV network equipment is a modern method allowing non-invasive way to locate the insulation faults provides comprehensive information about the insulation condition or determines the level of interference in the operation of the test object. Partial discharges cause gradual degradation of electrical insulation through the erosive, chemical and thermal effects - thus reducing its service life, reliability and cause electromagnetic interference. The work is focused on the diagnosis of external, internal and surface partial discharges of devices supplied with an alternating voltage of 50Hz frequency and a maximum effective value of 300 kV, the analysis of the measured results and the creation of ancillary laboratory products as well.
Tutor: Orságová Jaroslava, doc. Ing., Ph.D.
The main aim of the thesis is the analysis of available method of earth fault location, working up of the method of additional earthing of affected phase and evaluation of possible negative influences on network safety.
Tutor: Toman Petr, prof. Ing., Ph.D.
The concept of permaculture is known and has been used for nearly 40 years and is mainly associated with a sensitive approach to agriculture, nature and the environment so as to achieve sustainability. In areas where there has been damage to nature and seeks to ensure the subsequent regeneration and management of natural resources. Recently in permaculture they classified as advanced technologies associated with the use of renewable energy sources, especially locally available without energy transfer. Topic of study will focus on the research into the technologies available today for obtaining and use of energy, the least possible impact on the environment. This approach is often called a naming. "Eco". In this thesis, the student addressed the issues not only the use of ready-made systems, but also the design of new concepts eg. Small mobile power station, which could be shared between multiple users and used as temporary sources when they are needed. Part of the work would be given to energy-saving light sources for natural buildings and open spaces. In another part of the student engaged in the life cycle of existing and potential new facility. The purpose should be to ensure maximum recycling of materials and minimizing environmental impacts.
Tutor: Baxant Petr, doc. Ing., Ph.D.
This topic is focused on research of high efficiency electric motors, loss analysis and methods of loss reduction. Analysis of winding, space harmonics, elimination of parasitic space harmonics, special rotor designs, employment of recent materials of permanent magnets. Motor design using program Ansoft-RMxprt, FEM based simulation of designed motors using Ansoft-Maxwell 2D/3D, optimization. Realization and testing of the laboratory samples of motors is assumed.
Tutor: Vítek Ondřej, doc. Ing., Ph.D.
The aim of the research is to calculate and design high speed induction machine for dynamometers. Induction machine parameters are 200kW, 20000 r.p.m. Such machine has to fulfil high requirements for dynamic behaviour, it means to have low inertia torque, high stiffnes, high efficiency and reliability. Machine optimalization using artificial inteligence algorithms, simulation and measurement of dynamic properties will bet he goal of the research. Pattern of the machine will be produced to prove calcualtions and simulations. The research is in the frame of project Centrum and with cooperation of VUES Company.
Tutor: Ondrůšek Čestmír, doc. Ing., CSc.
The aim of the research is to calculate and design high speed synchronous machine with permanent magnets for dynamometers. Synchronous machine parameters are 120kW, 30000 r.p.m. Such machine has to fulfil high requirements for dynamic behaviour, it means to have low inertia torque, high stiffnes, high efficiency and reliability. Machine optimalization using artificial inteligence algorithms, simulation and measurement of dynamic properties will be the goal of the research. Pattern of the machine will be produced to prove calculations and simulations. The research is in the frame of project Centrum and with cooperation of VUES Company.
Visible light variation may leads to disturbance of human’s visual perception. The origin of such negative effect is in the eye anatomy and physiology. The major influence on the flickering light perception can be found in eye viewing field, photoreceptors (cones of three types and rods) and their distribution at retina as a part of eye anatomy and in eye adaptation mechanisms like pupil, photo-chemical and neural adaptation (response) to luminous variations (including the photoreceptors spectral luminous efficiency) as a part of eye physiology. The human eye can be seen as specialized luminance multi-detector where the stimulation contrast is as important as radiant density. There are differentiated three types of flicker: temporal, spatial and chromatic. All of these flickers are joyless and may involve many psychological interactions. In artificially illuminated areas, lamps light variations due to variations in supply voltage may also lead to flicker perception. Such lamp possibly will produce light with time-varying radiant flux and its spectral distribution. The lamps flickering is produced by a voltage Phase Modulation (PM), mainly by Phase Jumps (PJ) and by Interharmonic Voltages (IH) superimposed on a voltage waveform. Thesis is focused on the voltage fluctuation to lamps time-varying radiant flux and its spectral distribution fluctuation transfer analysis and on the utilization of the analysis results for development and realization of an objective flickermeter having response to both the temporal luminance and chromatic flicker. The thesis aim is the realization of the new flickermeter types implemented in LabVIEW, with the experimental verification. The thesis covers theoretical-analytical, developmental and also practical-experimental part of study. More information: drapela@feec.vutbr.cz.
Experimentaly focused PhD topic which will be solved in cooperation with JINR Dubna. Long-term fellowship in the group dealing with transmutation of spent nuclear fuel using accelerator driven systems is a part of the PhD study. Main objective of the thesis is to propose and validate alternative method for thermal power measurement, especially: get familiar with temperature measurement techniques and choose the most appropriate one (e.g. thermocouple), temperature changes will be within the range of tenths of Kelvins; design and construct tool for temperature changes measurement; deploy sensors in different places of spallation target and calculate integral values after experiments; compare results with different methods (multifoil activation method) and with calculations. Co-superviser of the thesis will be researcher of Joint Institute for Nuclear Research Dubna from Department of Nuclear Spectroscopy from group lead by Dr.Alexander Alexandrovich Solnyshkin.
Tutor: Katovský Karel, doc. Ing., Ph.D.
Thema is focused on problems of exact modelling of losses in IM to express all dominant losees at given torque and speed as a function of rotor frequency and flux density. Then the local minimum and corresponding optimum slip frequency and flux density can be found. This analytic task requires an accurate motor model and also to take into consideration the over-saturation of magnetizing inductance which occurs in real opeartion.
Induction motor for low power as a special electrical machines. Parameters, characteristics, application possibilities. Teoetická and experimental analysis of engine design and verification of functional parameters of the sample.
Tutor: Hájek Vítězslav, prof. Ing., CSc.
Student will operate and utilize unique experimental facility being built at Department of Electrical Power Engineering of FEEC BUT. Facility is design for investigation of flow boiling crisis at medium-low pressure of light water. Objective of PhD research is to bring new informations about modified and innovative surfaces influence on boiling crisis parameters. Data will be crucial for safety analyses and accidental conditions analyses of pressurized and boiling water reactors.
Problems of heat transfer from the switching arc plasma to adjacent materials will be studied with respect to requirements on the construction materials. Consequently, selected materials will be experimentally analysed in order to find out crucial input parameters for numerical simulations of the switching arc (electrical resistance, thermal conductivity, specific heat capacity, melting point, boiling point, etc). Numerical simulation will be verified by experimental tests in Laboratory of switchgear.
Tutor: Aubrecht Vladimír, prof. RNDr., CSc.
Low-Frequency Electro-Magnetic Compatibility in Low- and Middle-Voltage Distribution Systems Highly Penetrated by Distributed Nonlinear, Dynamic and Parametri
The theme is focused on the research and development of autonomous luminaires supplied from local renewable sources. Although these luminaires are already commercially available, their prevalence is minimal. Yet there is a considerable potential both for public lighting and in industrial, commercial buildings and public buildings. With advanced technology light sources based on LEDs and new optical systems can now handle very precise light distribution with high efficiency light transmission while minimizing energy consumption. In the context of student work will analyze the potential of available renewable resources within selected locations, the possibility of conversion into electrical energy, the efficient accumulation and optimal conversion to light. Is calculated using motion detectors, illumination intensity, or. prediction of the availability of renewable resources in conjunction with simulation programs for the weather forecast. This can help prevent depletion of stored energy in the case of such a long-term shortage. Sunshine without increasing the storage capacity of the battery. Another potential area of research could be the ability of cooperation of these lamps in small networks that enables the sharing of stored energy, ie installed capacity batteries.
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, capacitance and tan, 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.
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.
Tutor: Veselka František, doc. Ing., CSc.
Experimentaly focused PhD topic which will be solved in cooperation with JINR Dubna. Long-term fellowship in the group dealing with transmutation of spent nuclear fuel using accelerator driven systems is a part of the PhD study. Main objective of the thesis is to measure neutron field parameters and power related quantities of an ADS system with conventional methods (e.g.multifoil activation method) and results compare with calculations (and with results of other methods if available). Co-superviser of the thesis will be the head of Czech group in Joint Institute for Nuclear Research Dubna, Dr.Alois Kovalik, and researcher from Department of Nuclear Spectroscopy from group lead by Dr.Alexander Alexandrovich Solnyshkin.
The main aim of the thesis is design of the new concept of lightning and switching surge protection of generators, motors, transformers and decompensation coils in distribution networks.
The substituting circuit of the induction machine can be created in a form of the T-network, Gamma-network or Inverse-gamma-network. The new control methods are based on the formal mathematical recalculation of these substituting circuits into another suitable form. In the research frame, those new methods will be simulated in Matlab-Simulink, and verified experimentally. Hardware and software will be realized. The theme is mainly focused on the microprocessor programming. Part of the research will be the parameter identification of the substituting circuit. Part of the research will be the analysis and synthesis of new winding types with the help of a new developed analytical method.
Tutor: Patočka Miroslav, doc. Dr. Ing.
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.
Stability of electric power supply is - as a term - closely related with electrical energy production gained from renewable power sources (mainly from wind and photovoltaic power plants). The research will be focused on possibilities of accumulation of electric energy produced from renewable power sources with the help of modern technologies while focusing on hydrogen (VRB systems) utilization and pumped storage hydro plants for its accumulation. The result of the work will be the draft measures in the energy system, which can solve time disproportion between electrical energy supply and take-off from the renewable power sources. The solution is connected with computer simulation (Matlab) and experimental measuring on a real model.
Tutor: Mastný Petr, doc. Ing., Ph.D.
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.
The theme is focused on solving one of the key issues in contemporary energy that is electrical energy storage technology. It offers the potential is currently a fast growing electromobility. Use of electric cars as energy storage, while not a new idea, but it is not yet known and widespread practical applications, which should detail the whole concept worked. Students should study carried out in the framework of the existing search solution developed by electric vehicle simulation model and could work with a real prototype electric car that provides a real measurement data and operation. The objective is to verify the idea of using the storage battery for other purposes, in addition to power traction drive car. Further define the conditions of how such practical applications looked, and possibly a demonstration operational testing and data collection with their evaluation. There is also the use of data from electric BUT Skoda Superb.
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.
The goal is to research and development representatives series motors single and three phase. Particular attention will be paid to research in the sense of optimizing the magnetic circuit in terms of losses. The result of the project is expected modern small asynchronous machine at a high technical level that meets the maximum extent possible the requirements of manufacturers such as machine tools. Analysis and minimization of losses in the magnetic circuit and electrical machinery.
The main aim of the work is detailed risk analysis of electrical networks operated with faults and proposal of methodology for earthing system optimization.
The research will be focused on the analysis and synthesis of new winding types with the help of a newly developed analytical method. Part of the research will be the parameter identification of the substituting circuit. The substituting circuit of the induction machine can be created in a form of the T-network, Gamma-network or Inverse-gamma-network. In the research frame, the new control methods will be developed, which are based on the formal mathematical recalculation of these substituting circuits into another suitable form. These new methods will be simulated in Matlab-Simulink, and verified experimentally. Hardware and software will be also realized.
Evaluate current options (worldwide) management and monitoring of building energy systems with renewable energy sources. Design and create a unified system of regulation and control for the system, which will include heat pumps, solar thermal collectors and hybrid energy system with accumulation (photovoltaics, wind turbines) in order to achieve the maximum possible interactions between different sources and devices with respect to environmental influences. Underlying assumption of the proposed system is based on the concept of using PLC.
The theme is focused on a depth analysis of the impact of light sources, luminaires and their controller on the environment. The main part should be the deal with the analysis of energy and environmental balance of light sources and luminaires in the production, operation and subsequent ecological disposal. The theme at this time when it is appropriate to rationalize energy, is gaining importance. The result should be the evaluation of individual components needed to produce lighting equipment from different perspectives (energy, environmental, etc.).
Tutor: Škoda Jan, Ing., Ph.D.
Conceptual solution of an island DC networks where resource base consists of hybrid energy system (photovoltaic, wind turbine, accumulation). The goal is to propose a technical solution of energy system enabling in case of lack/excess energy cooperation with AC network and simultaneously ensure the safe power to the object. The solutions will be also the design and testing of control and monitoring algorithm.
The main aim of the work is the proposal of algorithms for load prediction based on history and on evaluation of needs and proposal of implementation into control of distribution networks.
Integration of large scale renewable energy sources and small size generating facilities into the electricity structure will require new electricity grid structures and new strategies for their operation and control to ensure efficiency, security, sustainability, reliability and high quality power supplies. It can be assumed that the distribution networks will be addressed: • the change of power flow direction - protection of distribution networks will develop to become more similar to transmission systems, • new protection algorithms able to cope with the lower short circuit currents in the system because of the greater contribution of converter based generators, • new automation applications of DG connected to the distribution network - control capabilities, reconfiguration, synchronization and reclosing, • development of powerful communication networks in the distribution system with data integration based on the standard IEC 61850 communications, • reliable islanding detection and intentional islanding capability.
An increasing proportion of stochastic resources in networks affect the voltage stability during the day. Variable power delivery to the grid from these sources causes fluctuations in voltage variations during the daily diagram. Current devices used to the voltage regulation are unable to provide the required voltage level at all points of the network. The aim is to describe new possibilities and means for voltage regulation in distribution system and design concept of this regulation with regard to the current development of the resource base.
The power system reliability is high priority of present society. The main aim of the thesis is the analysis of present methods of condition evaluation of distribution network equipments and using the got information for fault detection in distribution networks. The example could be worse insulation state of transformers, grommets, single phase fault in line with covered conductors etc.
The aim is to define expected functionalities of the revenue meters and their integration to individual security-technical layers of a distribution system management, furthermore to optimize metering features and data concentration for individual tasks.
The new experimental setup TANGRA, for the investigation of neutron induced nuclear reactions, e.g. (n,xn), (n,xng), (n,g), (n,f), on a number of important isotopes for nuclear power, science and engineering (235,238U, 237Np, 239Pu, 244,245,248Cm) is under construction and being tested at the Frank Laboratory of Neutron Physics (FLNP) of the Joint Institute for Nuclear Research (JINR) in Dubna. Student will be a member of research team of the TANGRA project and will contribute to development and utilization of the facility especially for nuclear power research. A long-term fellowship in Joint Institute for Nuclear Research Dubna, Russa is a part of PhD study of the theme. Co-supervisor of the thesis will be Dr. Yurij Nikolaevich Kopatch, the researcher of Frank Laboratory of Neutron Physics and the Head of Sector of investigations of neutron-nuclear interactions.
The aim is to propose coordination of voltage regulation techniques and to develop voltage regulation scheme for future active distribution systems considering entire set of available technical assets.