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Original title in Czech: Silnoproudá elektrotechnika a elektroenergetikaFEKTAbbreviation: PP-SEEAcad. year: 2018/2019
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
prof. RNDr. Vladimír Aubrecht, CSc.
Issued topics of Doctoral Study Program
The experimental part of the work will deal with a detailed analysis of turn-on and turn-off switching processes in IGBT and MOS-FET power transistors, focusing especially on very fast transistors based on the SiC and GaN materials. Considering the extreme switching speed of these semiconductors, it will be necessary for the purpose of oscillographic measurements to develop current sensors with a very large bandwidth of at least 300 MHz. The theoretical part of the work will be focused on determination of a mathematical model of the turn-on and turn-off processes in the transistor. The model will be realized using the experimentally obtained data. The purpose of the model will be an exact calculation of switching losses in a transistor in arbitrary operating conditions. The mandatory foreign internship should be realized at TU Wien (Austria) or TU Delft (Netherlands).
Tutor: Procházka Petr, Ing., Ph.D.
Centralized protection system is based on the monitoring of currents and voltages in distribution network through modern transducers with digitized outputs in accordance with the Sampled Values (SV) protocol according to IEC 61850-9-2. The work is focused on research of new protective features built on the possibility of these converters (high linearity and accuracy measurement, dynamic correction of measured values) as well as the concentration measured variables in one place (Process Bus). Its aim is to program functional application for monitoring and protecting specific part of distribution network that will use advanced protection algorithms and completely new functionalities for centralized systems of protection, control and optimization of power systems. The theme of this work cover besides power systems also information technology. Knowledge of computer networks, development of realtime applications and design of user interfaces for data presentation will be applied. Therefore, this work is recommended to candidates who have completed the information technology studies.
Tutor: Orságová Jaroslava, doc. Ing., Ph.D.
The main objective of the thesis is to prepare calculation models of accelerator driven nuclear systems ADS, perform calculations, maintain results and analyze influence of different parameters. Different types of systems will be analysed, like neutron generator driven system, electron as well as proton accelerator driven system, etc. Model will be validated using real ADS systems under the cooperation with Joint Institute for Nuclear Research Dubna, Uzhhorod National University, Texas A&M, and MSU Baroda. Validated models will be used for proposals of optimizations of theses experimental facilities. Calculation codes based on Monte Carlo method will be mainly used for calculations. Doctoral research will be supported by the internship at foreign research institution.
Tutor: Katovský Karel, doc. Ing., Ph.D.
Current connection conditions for micro-sources with power up to 10 kW allow this kind of resources to connect only to announcement (the classic procedure for connecting to the grid is not needed). The increase in these installations brings some operational problems, such as affecting of power quality at the point of connection or energy overflow to the grid. The aim of the research is to define the conditions for the correct connection and operation of these resources with a focus on preserving the quality of electric power. In the context of the definition mentioned rules is also required to revise the current legislative rules and make an adjustment of the rules in relation to new findings. Part of the thesis will be (out of basic math modeling) verification of theoretical findings to real applications and verification results an experimental hybrid system which is operated in laboratories at Department of Electrical Power Engineering.
Tutor: Mastný Petr, doc. Ing., Ph.D.
Increasing deployment of power converters in distribution systems leads to rise in high-frequency conducted disturbance level related to the converters switching frequencies. The switching disturbances occur dominantly in frequency range from 2 kHz to 150 kHz. Current experience shows that such disturbance may lead to serious malfunction of grid-connected sensing, measuring and/or controlling systems of analog or digital nature. At the same time there is significant gap in EMC coordination and standardization since the frequency range was for a long time out of interest. It is just between low-frequency disturbances connected to power quality and radio-frequency disturbance. The project is focused firstly on development of suitable measuring apparatus and procedure to monitor the disturbances in distribution systems in the audio-frequency range. Then origin and propagation of the disturbance should be studied and finally EMC concept is expected to be proposed. The theme takes a part of research project in cooperation with Czech utilities and with foreign universities (Germany, Italy). An intership at a foreign research institution, for instance TU Dresden, DE, is expected. Ask for more details at drapela@vutbr.cz.
Tutor: Drápela Jiří, prof. Ing., Ph.D.
The doctoral thesis is focused on constrained modeling of electric machines, i.e., construction of analytical models including electrical, magnetic, mechanical and thermal effects in the machine.
Tutor: Cipín Radoslav, doc. Ing., Ph.D.
Future trends in the electrical power engineering predict the development of dispersed generation, accumulation and microgrids. With respect to the output voltage of the photovoltaic panels and the batteries there are integral parts of the development of microgrids also DC installations and hybrid AC / DC grids. The aim of PhD study is to analyse the key challenges of hybrid AC / DC networks operation and to propose a methodology for cost effective voltage and current measurements for systems of adaptive control and protection respecting eg. different levels of short circuit power in all operating conditions, specific characteristics of DC current at fault clearance.
Tutor: Toman Petr, prof. Ing., Ph.D.
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. An intership at a foreign research institution, for instance Università degli Studi della Campania "Luigi Vanvitelli", is expected. More information: drapela@feec.vutbr.cz.
The soft-switching techniques of DC/DC converters enable to eliminate switching losses. Then the switching frequency can be increased without decreasing the converter efficiency. The high switching frequency is highly desired since it enables reducing of dimensions, mass and volume of wound converter components (coils, transformers). Further using the progressive technology SiC or GaN the switching frequency can be increased much more. The obligatory foreign educational stay is expected in TU Vienna.
Tutor: Vorel Pavel, doc. Ing., Ph.D.
The dissertation will be focused on development of new extended protection functions optimized for distribution networks which would make use of the advantages of current or voltage transducers with a digitalized output. Thanks to the possibility of secondary signal correction and loss-free transmission of monitored signal, these transducer types offer a number of advantages when compared to the conventional solution on the basis of instrument transformers, such as high linearity, high accuracy in the wide frequency range, the possibility of temperature, phase displacement and amplitude correction and suchlike. Thanks to these precision transducers it is possible to use data monitored with high accuracy in the range from operating currents to the area of short-circuit currents without a danger of their saturation. Thanks to synergy of the project targets with modern electronic current transducers, the research activities will be also focused on the research of the methodology for evaluation of accuracy and operational qualities of new types of electronic transducers.
Tutor: Topolánek David, doc. Ing., Ph.D.
The development of electromechanical systems in particular is currently associated with the requirement of high reliability and durability as defined in connection with the transition to higher levels of performance and speed. Therefore, the topic is focused on assessing the impact of failures on the part of the electromechanical system's operating characteristics. The aim is to complete the study and diagnosis of electromagnetic and mechanical properties on the vibration generation and application of supply current. The work consists of theoretical, experimental and practical part. The issue is to continuously UVEE resolved within several projects.
Tutor: Veselka František, doc. Ing., CSc.
The core of the theme consists in problems of gate driving of power switching transistors SiC MOS-FET and GaN-MOSFET. These transistors represent the top-technology in power electronics nowadays. The extremely low switching times enabled with these technologies bring an advantageous possibility to decrease switching losses in the power circuits of the converters. However, at the same a strong influence growth of several specific parasitic effects can be observed. These parasitic effects correspond also to the problems of driving strategy and topology. Therefore searching for the optimum concept solution and its suitable hardware realization represent a crucial theme in power electronics. The mandatory foreign internship should be realized at TU Wien (Austria) or TU Delft (Netherlands).
The topic is aimed to critical revision of power components theories taking into account physical merits of measured phenomena related to nonlinear, dynamic and active distribution systems. It is expected to develop a metrics for revenue meters which will cope correctly with nowadays phenomena in order to measure really passing active energy. The theme takes a part of research project in cooperation with Czech utilities and with foreign universities. An intership at a foreign research institution, for instance Università degli Studi della Campania "Luigi Vanvitelli", is expected. Ask for more details at drapela@vutbr.cz.
Design and realization of induction machine control techniques considering maximum efficiency in wide range of operating torque and speed, which is beneficial in traction drives especially in independent traction applications
Tutor: Pazdera Ivo, Ing., Ph.D.
The aim of the project is the research and development of special electric machine with excitation permanent magnets and armature winding in the stator without magnets and or winding in the rotor. Due to this special construction the machines are able to be produced as high speed and or integrated e.g. with pump and or compressor as one compact product to save material and volume. It is supposed to design, produce and optimize very high speed generator 70 kW with maximal speed using up to date materials. The project is with the support of Czech technological agency TAČR in cooperation with PBS Velká Bíteš company. Obligatory PhD students abroad stages are able to be realized in Lapperata Universiy (Finland), University of Nottingham, (G.B.), Sheffield University (G.B.), University of Padova (Italy) and or in Baumueller Company (Germany).
Tutor: Ondrůšek Čestmír, doc. Ing., CSc.
The aim of the project is the research and development of very high torque motors with the torques in the range of kilonewtonmeters. The special attention will be given to high torque permanent magnet assisted reluctance motors with ferrite magnets instead of rare earth permanent magnets specially arranged (Hallbach variant) to get maximum flux density in the air gap. The special magnet arrangement including the machine realization will be the main benefit of the project. Obligatory PhD students abroad stages are able to be realized in Lapperata Universiy (Finland), University of Nottingham, (G.B.), Sheffield University (G.B.), University of Padova (Italy) and or in Baumueller Company (Germany).
This work is focused on research and development of high-speed synchronous electrical machines. Beside the induction machines, the permanent magnet synchronous machines and the synchronous reluctance machines are one of the most frequently used types of high-speed machines. The aim of this topic is to define a crucial areas of design, to choose the promising type of machine, to introduce the method of design/calculation, to verify this method, to develop/improve the FEM models, to support the manufacturing of the laboratory sample, to verify the parameters of designed machine. The mandatory foreign internship should be realized at Lappeenranta University of Technology, Finland.
Tutor: Vítek Ondřej, doc. Ing., Ph.D.
The urgent need for the development of charging stations for hybrid cars and electric vehicles (EV) still shows as important in the context of the current gradual development of this type of transport. The theme is focused on energy analysis of the concept of charging stations with integrated accumulation and renewable energy sources. Based on the concept will be developed the mathematical models. It will be performed energy-economic analysis in order to verify the possibility of using the concept in this way to reduce the load of the network at the connection point. Direct possibility of cooperation on concrete solution with an energy company is expected.
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. An intership at a foreign research institution is expected. More information: drapela@feec.vutbr.cz.
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. Design, calculation and production of asynchronous engine functional samples with a full 100 W rotor. Sample measurement and testing, evaluation of results. The aim of the solution is to design and implement a simple and cheap engine for smaller ones drives. The cooperation with ATAS Nachod electric motors is envisaged. An internship of 1 month will be possible in TU Glivice, TU Vienna, TU Košice, or TU Žilina, in the extreme case also in TU Athens.
Tutor: Hájek Vítězslav, prof. Ing., CSc.
The aim is to develop technically correct, reliable and verified concept for islanding operation (IO) of dedicated part of distribution system with distributed generation dealing mainly with definitions of conditions necessary to successful transition to IO, correct and reliable detection of conditions for transition to IP and back to parallel operation, development of power sources (loads) control strategy, etc. An intership at a foreign research institution, for instance Università degli Studi della Campania "Luigi Vanvitelli", is expected. For more information email to: drapela@feec.vutbr.cz.
The theme is focused on the measurement of very small distances and deformation of rotating electrical parts. machines that have a significant effect on the operating characteristics of machines and equipment. The measurement is made modern measuring, recording and evaluation techniques. The aim is to assess and optimize the partial impacts of physical quantities on the characteristics and parameters of electromechanical systems. The work consists of theoretical, experimental and practical part. The issue is UVEE continuously addressed in the grant project, forthcoming international cooperation. Results are regularly published.
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.
The doctoral thesis is focused on analyzing the possibilities of electrical machine parameter estimation in various operating modes with a focus on asynchronous motors. The results will be used to construct accurate mathematical models, which also will be used in the design of modern control structures, e.g. predictive control.
The growing use of electronic energy-meters, as a replacement of old mechanical meters, carries a far greater potential of utilization than present is. For this reason, the subject is focused on the assessment of the additional benefits of SmartMeters functionalities resulting from measurement and processing of the instantaneous values of current and voltage at the point of common coupling. The goal will be mapping the appropriate features and functionalities that will offer benefit for both users (both technical and non-technical losses, voltage quality, remote parameterization main circuit breaker - reserved capacity, etc.) and distribution companies in the field of services, quality supply, operation and optimization of distribution networks (remote management of supply points, detection of "harmful" supply points, crisis management, prevention of emergency state, etc.). The aim of this work will be also proposal of new functionalities and their case study tests base on numerical models of characteristic distribution system, including final evaluation of respective benefits. The second part of this topic will be focused on area of energy meter accuracy evaluation and also verification of used current transducers in real operation condition for case of accidental revision of energy-meter systems at supply points.
The aim of the project is an application of magnetic coenergy for magnetic field computation and in the design and transient analysis of electric machines. The method is based on new formulation of magnetic coenergy in combination with finite element methods. This new method enables effective, computer time saving solution of transients in electrical machines respecting nonlinearities. The project is mainly theoretical. Obligatory PhD students abroad stages are able to be realized in Lapperata Universiy (Finland), University of Nottingham, (G.B.), Sheffield University (G.B.), University of Padova (Italy) and or in Baumueller Company (Germany).
Evaluation of electric arc temperature and particle density using optical emission spectroscopy. High speed camera imaging of an arc discharge channel. Characterization of construction materials diffusion into discharge volume and its influence on the electric arc properties. An internship on the INP Greifswald is mandatory during this doctoral study. The minimal internship length is one month.
Tutor: Kloc Petr, Mgr., Ph.D.
Calculation of optimal band distribution for mean absorption coefficients. Evaluation of the electric arc configuration and plasma composition on frequency band boundaries. Comparison of different numerical optimization algorithms and their application to the problem of radiative heat transfer in plasma. An international internship is mandatory during the doctoral study. Expected place of internship is LAPLACE laboratory of the University of Toulouse.
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, accumulators based on Lithium 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.
The dissertation will be focused on research of a new probabilistic approach for evaluation of optimal operation of distribution network based on calculation and evaluation of fatal probability, probability of faults and continuity of supply. The methodology will respect already applied and new approaches optimized not only for national but also for international distribution networks operation conditions. The topic of the dissertation encompasses several areas that are focused on i.e. calculating of the earth fault levels, evaluating of fault duration and frequency, as well as area focused on calculation and analysis of the potential distribution on surface for evaluation of possible levels of touch and step voltages, transferred potential to low-voltage earthing systems and also assessment of the probability of human touch presence, fault ignition and touch/fault coincidence.
Methodology of evaluation of discomfort glare of interior spaces and exterior light system is based on premise of uniform radiating surface of luminaires. However with late LED expansion this premise is mostly not accomplished and thus there is an effort in International Commission on Illumination CIE to revise methods designated for discomfort glare analysis. Thus the aim of study is in finding correlation between used glare analysis and non-uniformity of radiating surface of luminaire that should lead to improvement of methodology of glare analysis.
Tutor: Škoda Jan, Ing., Ph.D.
Research and development of a new generation of small and special motors with higher specification. The results will be proposals for functional prototypes and their verification. These are mainly asynchronous motors with a power up to 1000 W for a variety of drives. Selection of three types of different performance will be performed. Optimization of volume and consumption of active material, as well as an increase in efficiency. Production and testing of functional samples, prototypes, with help of one of the manufacturing companies, eg ATAS Elektromotory Náchod, or EMP Slavkov u Brna. An internship of 1 month will be possible in TU Glivice, TU Vienna, TU Košice, or TU Žilina, in the extreme case also in TU Athens.
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. An internship of 1 month will be possible in TU Glivice, TU Vienna, TU Košice, or TU Žilina, in the extreme case also in TU Athens.
The aim of the project is the research and development of synchronous motor design for direct connection into the power network without electronic inverter. Such motors are sometimes named as „synchronized induction motors“. The advantage of these machines is greater efficiency. The starting procedure is as induction machine and after getting the speed near synchronous speed the rotor is pulled into synchronism. On the contrary of pure synchronous machine the synchronized asynchronous machine is able to overcome short time overloading. It will be necessary to use artificial intelligence during the design. Obligatory PhD students abroad stages are able to be realized in Lapperata Universiy (Finland), University of Nottingham, (G.B.), Sheffield University (G.B.), University of Padova (Italy) and or in Baumueller Company (Germany).
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 aim is to create a testing system that enables detailed analysis of current and voltage transducers with digitized output SampleValue (electronic sensor) according to IEC 61850-9-2. The test system has to be designed to evaluate the real time delay of the primary signal, error of amplitude and phase displacement of entire system and also its individual parts (the current / voltage transducer, digitizing units (A/D converter) and merging unit). The proposed system will be utilized not only for standard tests, but also for extended testing of frequency characteristic, the temperature dependence etc. The results of the tests will be used for determination of correction factors or curve to improve accuracy of such electronic sensors. The test system will be based primarily on the LabView platform.
New technologies of measurement and communications bring new possibilities of synchronous measurement of faraway substations. The main aim of research is detailed analysis of Electrical values during power system faults and proposal of method for their identification.
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.).
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.
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 sources, • 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.
Spent nuclear fuel parameters like residual heat generation, neutron or gamma emission or reactivity, are very important information, which has completely been defined by nuclear fuel inventory. Spent nuclear fuel inventory means a vector of nuclear fuel nuclide concentration, especially fission products, activation products, and decay products. Such data together with fuel history, initial enrichment and/or initial burnup absorbers concentration, define physical quantity called burn-up (mean assembly burn-up; fuel rod burn-up; etc.). Burn-up values for core off-loaded and/or stored fuel assemblies are calculated using reactor-physics codes; as well as other parameters of spent fuel, like inventory. However, experimental verification of calculated values is very difficult and requires complex utilization of passive and active detection methods and simulated values. Investigation of experimental methods of spent nuclear fuel characterization as well as simulation is the main task for a PhD candidate registered to the topic. Resulted methodology would be utilized by safeguards or by authorities responsible for long term storage and/or final repositories of spent nuclear fuel. Doctoral research will be supported by the internship at foreign research institution.
The thesis is focused on the design and the development of a model representing the cooperation of battery and photovoltaic systems connected via hybrid inverters into the distribution network (DG). The main object of the research is to specify the possible use of this concept to support of the distribution network operation, i.e. voltage regulation, reactive power compensation, distribution congestion relief, asymmetry compensation, power microoutages limitation, backup source for crisis management, distribution capacity compensation, etc. Research results are the definition and the establishment of criteria for the inverter management and for using of this concept within the system network services at level of low and medium voltages. The research is also targeted on the identification and the development of other new possibilities for DG operation supporting.
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 equipment 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. An intership at a foreign research institution, for instance TU Dresden, DE, is expected. For more information email to: drapela@feec.vutbr.cz.
Diagnostic of middle and high voltage power cables is currently based on measuring of the partial discharges and electronic bridge measurements. The methodology of measurement in these areas is constantly improved and adapted to the modern trends and requirements of the customer. The goal of this thesis is the unification of the measurement methods according to current standards, optimization of the measuring procedures and the development of new measuring principles based on the knowledge gained in this problematic.
The goal of the thesis is to theoretically and experimentally investigate Accident Tolerant Fuel. Student will calculate thermal conductivity influence of various additives in ceramic uranium matrix; simulate influence on neutronics characteristics of such nuclear fuel. Based on these analyses student will propose experimental verification of these predictions. Student will prepare innovated pellets and will experimentally study their properties. Student will evaluate benefit for industrial practice based on effective fuel utilization, fuel cycle economy, and mainly on nuclear safety. 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. Doctoral research will be supported by the internship at foreign research institution.
New technologies for distribution networks bring new possibilities for providing the system and support services also at the level of the distribution networks. The aim of the work is based on a detailed analysis of the possibilities of new technologies to create models to verify the dynamic behaviour of new components and to analyse the possibility of using for the system and support services during frequency deviations.