Full-time study

4 years

prof. RNDr. Vladimír Aubrecht, CSc.

Chairman :
prof. RNDr. Vladimír Aubrecht, CSc.
Councillor internal :
doc. Ing. Petr Mastný, Ph.D.
prof. Ing. Jiří Drápela, Ph.D.
doc. Ing. Pavel Vorel, Ph.D.
doc. Ing. Ondřej Vítek, Ph.D.
prof. Ing. Petr Toman, Ph.D.
Councillor external :
prof. Ing. Radomír Goňo, Ph.D.
Ing. Petr Modlitba, CSc.
prof. Ing. Aleš Richter, CSc.
Ing. Zdeněk Wolf

The doctor study programme is devoted to the preparation of the high quality scientific and research specialists in various branches of power electronics, control technology, design of electrical machines, electric power generation and distribution, and electric power utilization.
The aim is to provide the doctor education in all these particular branches to students educated in university magister study, to make deeper their theoretical knowledge, to give them also requisite special knowledge and practical skills and to teach them methods of scientific work.

The goal of the postgradual doctoral (PhD) study of the program "Power Systems and Power Electronics" 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 university teachers and in higher manager functions as well.

The graduate of the doctor study program "Power Systems and Power Electronics" obtains broad knowledge of subject of high power engineering. The knowledge is built 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.

Doctoral studies are carried out according to the individual study plan, which is prepared by the supervisor in the beginning of the study in cooperation with the doctoral student. The individual curriculum specifies all the duties determined in accordance with the BUT Study and Examination Rules, which the doctoral student must fulfill to successfully finish his studies. These responsibilities are time-bound throughout the study period, they are scored and fixed at fixed deadlines.
Students will write and pass tests of obligatory subject Exam in English before the state doctoral examination, compulsory elective courses in view of the focus of his dissertation, whereas at least two are selected from: Mathematical Modelling of Electrical Power Systems, New Trends and Technologies in Power System Generation, Selected problems from power electronics and electrical drives, Topical Issues of Electrical Machines and Apparatus), and at least two optional subjects (English for PhD students; Quoting in Scientific Practice; Resolving Innovation Assignments; Scientific Publishing from A to Z).
The student may enroll for the state doctoral exam only after all the tests prescribed by his / her individual study plan have been completed. Before the state doctoral exam, the student draws up a dissertation thesis describing in detail the aims of the thesis, a thorough evaluation of the state of knowledge in the area of the dissertation solved, or the characteristics of the methods it intends to apply in the solution.
The defense of the controversy that is opposed is part of the state doctoral exam. In the next part of the exam, the student must demonstrate deep theoretical and practical knowledge in the field of electrical engineering, electronics, electrical machines, and electrical apparatus. The state doctoral examination is in oral form and, in addition to the discussion on the dissertation thesis, it also consists of thematic areas related to compulsory and compulsory elective subjects.
To defend the dissertation, the student reports after the state doctoral examination and after fulfilling conditions for termination, such as participation in teaching, scientific and professional activity (creative activity) and at least a monthly study or work placement at a foreign institution or participation in an international creative project.

The doctoral studies of a student follow the Individual Study Plan (ISP), which is defined by the supervisor and the student at the beginning of the study period. The ISP is obligatory for the student, and specifies all duties being consistent with the Study and Examination Rules of BUT, which the student must successfully fulfill by the end of the study period. The duties are distributed throughout the whole study period, scored by credits/points and checked in defined dates. The current point evaluation of all activities of the student is summarized in the “Total point rating of doctoral student” document and is part of the ISP. At the beginning of the next study year the supervisor highlights eventual changes in ISP. By October, 15 of each study year the student submits the printed and signed ISP to Science Department of the faculty to check and archive.
Within the first four semesters the student passes the exams of compulsory, optional-specialized and/or optional-general courses to fulfill the score limit in Study area, and concurrently the student significantly deals with the study and analysis of the knowledge specific for the field defined by the dissertation thesis theme and also continuously deals with publishing these observations and own results. In the follow-up semesters the student focuses already more to the research and development that is linked to the dissertation thesis topic and to publishing the reached results and compilation of the dissertation thesis.
By the end of the second year of studies the student passes the Doctor State Exam, where the student proves the wide overview and deep knowledge in the field linked to the dissertation thesis topic. The student must apply for this exam by April, 30 in the second year of studies. Before the Doctor State Exam the student must successfully pass the exam from English language course.
In the third and fourth year of studies the student deals with the required research activities, publishes the reached results and compiles the dissertation thesis. As part of the study duties is also completing a study period at an abroad institution or participation on an international research project with results being published or presented in abroad or another form of direct participation of the student on an international cooperation activity, which must be proved by the date of submitting the dissertation thesis.
By the end of the winter term in the fourth year of study the students submit the elaborated dissertation thesis to the supervisor, who scores this elaborate. The final dissertation thesis is expected to be submitted by the student by the end of the fourth year of studies.
In full-time study form, during the study period the student is obliged to pass a pedagogical practice, i.e. participate in the education process. The participation of the student in the pedagogical activities is part of his/her research preparations. By the pedagogical practice the student gains experience in passing the knowledge and improves the presentation skills. The pedagogical practice load (exercises, laboratories, project supervision etc.) of the student is specified by the head of the department based on the agreement with the student’s supervisor. The duty of pedagogical practice does not apply to students-payers and combined study program students. The involvement of the student in the education process within the pedagogical practice is confirmed by the supervisor in the Information System of the university.

3. round (applications submitted from 01.12.2024 to 15.12.2024)

1. Active power reserve estimation on unbalanced distribution network for the needs of flexibility

   The theses is focused on the state estimation of the power/current flow in individual phases of unbalanced distribution network for the needs of assessing the available power load in the points of common coupling (PCC). This information is a necessary basis for flexibility concept utilization, or load management concepts using multi-tariff structures or flexible tariffs in PCC. To determine the available load, unbalanced distribution system models and asymmetrically measured data from both distributed measurement and load diagrams determined by the operator will be used. As part of this issue, in addition to state estimation, the prediction of available load for the needs of flexibility will be solved, using long-term measurement information from PCC or distribution transformer stations MV/LV. In this area, an analysis of the time of maximal prediction will be performed, taking into account the variable availability of measurements, the number of monitored parameters and load diagrams. The main challenge of this topic is to find a method that minimizes the need for measurements (number of locations and monitored parameters) in order to reliably estimate the assimmetrical load of the system.

   Tutor: Topolánek David, doc. Ing., Ph.D.

2. Complex Lighting Systems in Sustainable Concept

   Lighting technology is experiencing another tumultuous period of development as we have very efficient light sources, very sophisticated control technology and the technology to develop virtually any luminaire. The seemingly well-studied area of the physiology of visual perception is now being significantly expanded by discoveries in the field of the effects of light on humans, namely in the area of biological processes. The influence of light has been demonstrated down to the molecular level and this important fact cannot be ignored in future technologies. At the same time, however, there is extreme pressure to save energy and to find ways to reduce the energy consumption of buildings, which does not exclude lighting technology. The topic of the PhD thesis will therefore address these seemingly contradictory requirements and look for ways to meet both requirements at the same time. Lighting technologies will have to respect not only energy, but also material and environmental issues. These aspects will also be addressed in the work. The result of the work should be a new vision for lighting technology that motivates manufacturers and users to focus on long-term solutions rather than short-term economic ones.

   Tutor: Baxant Petr, doc. Ing., Ph.D.

3. Decentralized energy communities: Technology and implementation in the Czech Republic

   Community energy is an innovative approach to energy production, distribution and consumption, focused on involving local communities in the energy market. This concept uses decentralized energy sources, such as photovoltaic systems, small wind farms and battery storage, to ensure energy self-sufficiency and reduce environmental impacts. Key challenges are the technological integration of smart grids and demand management systems and the legislative environment. In the Czech context, community energy offers the potential to strengthen the energy independence of municipalities, reduce greenhouse gas emissions and involve citizens in the transition to more sustainable energy systems. The work will focus on the analysis of the concept, the design of technological solutions and the simulation of a pilot project in the context of the Czech Republic. The condition for successful defense of this work is to complete at least one month long internship at a foreign university (Tampere University is pre-negotiated). Objectives of the work: - Community energy concept analysis. - Analysis of current technologies used in community energy, including decentralized energy sources. - Analyze the possibilities of managing and optimizing energy flows in communities, for example using consumption management systems, IoT and smart grids. - Develop a conceptual design of a model energy community for a specific location in the Czech Republic. - Implement a simulation of the operation of the model community, including optimization of energy flows.

   Tutor: Mastný Petr, doc. Ing., Ph.D.

4. Design and development of alternative partial discharge meters and indicators for high voltage equipment

   - Carry out an analysis and search of current principles and alternative solution of partial discharge measurement, - find suitable solutions or a combination of sensors on the basis of sensitivity measurement, determination of the nature of the fault, detection of the fault location and complexity of the solution, - implement own design and laboratory verification of functionality and range of parameters in shielded cells, - implement own, especially alternative principles of partial discharges measurement to indicators and fault meters in HV equipment.

   Tutor: Krbal Michal, Ing., Ph.D.

5. Integration of energy communities into the existing distribution system concept

   European energy and climate legislation declares new roles and new mechanisms for the functioning of the energy sector, with an emphasis on active involvement and protection of consumers in providing for their own energy needs. In the Czech environment, the existing models and business relations of energy market actors do not fully comply with the requirements and regulations. One of the key areas brought about by the new regulations is the possibility of developing so-called energy communities as a tool for the necessary energy transformation. These entities will bring economic, social and environmental benefits at both local and national level. The aim of the study topic is to research and develop effective technical and organizational frameworks for the establishment of energy community projects in the conditions of the Czech Republic. Furthermore, to provide professional (technical, economic) input to the ongoing discourse on the possibilities of energy decentralization. Outline: - Analysis of existing possibilities and regulations for the establishment of energy communities in the Czech Republic, - Analysis of the technical integration of community associations into current realities, - Methodology of technical solutions for the operation of communities, - Design of measures for a proper distribution of roles (responsibilities) within the communities, - Economic underpinning of calculations for the correct sizing of energy communities. Within the scope of the topic, an international internship at the TU Graz, AT, or at the Hertie School, Berlin, DE is expected. Another possibility is to use the Erasmus programme with a profiled focus on the departments. Funding is expected through grant applications and projects. Currently, an application has been submitted to the TAČR programme entitled "The impact of energy price changes on consumer behaviour in the Czech Republic".

   Tutor: Radil Lukáš, Ing., Ph.D.

6. Integration of Inverter Based Grid-Forming Ready Resources with Asymmetric Control

   The issue of integrating grid-forming converters and converters with asymmetric control is currently highly relevant due to the rapidly growing share of renewable energy sources (RES) and decentralized generation in distribution networks. Traditional grid control concepts based on conventional synchronous machines are becoming inadequate for effectively managing modern grids, which are characterized by significant fluctuations in both energy production and consumption. Grid-forming converters, which are capable of independently establishing grid voltage, thus appear as key technologies for maintaining grid stability during outages or under higher levels of decentralization. Simultaneously, converter sources at the distribution network level must handle required control asymmetry or, in the case of grid-forming converters, the natural asymmetry in load. Asymmetric control of these converters offers potential benefits in terms of energy efficiency and system robustness, as it allows for a more flexible response to dynamic conditions within the grid, including asymmetric load or generation characteristics. The topic is also relevant from a legislative perspective, as stricter standards for power quality demand effective solutions for managing asymmetries in the grid and minimizing adverse impacts on meters and the distribution network. Research in this area thus holds high potential to contribute to the development of advanced control strategies for ensuring stability, efficiency, and quality of electricity supply in future smart grids. The doctoral study focuses on a comprehensive analysis of the integration of asymmetric control in grid-forming converters to optimize their performance parameters and meet the stringent demands of modern power grids. The primary research area addresses asymmetric load control of converters and its impact on the sizing of converter components, lifespan, control stability, and resilience to operational deviations. The analysis will explore the feasibility of implementing asymmetric control in the context of converters controlled as current sources, with an emphasis on the differing behavior of these systems compared to the natural asymmetry of grid-forming converters. A significant part of the study will also involve evaluating the acceptable level of asymmetry in distribution networks, with regard to network load and the effects of control dynamics on energy measurement by meters, relative to the desired state. Additionally, the study will analyze consumption characteristics across different consumer segments, including households, commercial operations, and embedded generation units, allowing for the definition of energy requirements for system stability and robustness. Another objective is to assess the coexistence of asymmetric control and the behavior of converters with functionalities like peak-shaving.

   Tutor: Morávek Jan, Ing., Ph.D.

7. Integration of storage systems into the concept of electricity system support

   With the change in the energy mix concept and the increase in the share of stochastic sources (wind and photovoltaic plants), the concept of stability of the supply of electricity and its quality is closely connected. The topic is focused on the possibilities of accumulating electrical energy produced from renewable sources using modern technologies, with a focus on chemical accumulation and the use of pumped water power plants. The output of the work will be a proposal for measures in the energy system, which will solve the time disproportion between the supply and withdrawal of electricity from renewable sources and a proposal for a conceptual-technical solution for a selected part of the system in the Czech Republic. The solution is combined with modeling on a PC and experimental measurement on a functional model. The issue will be resolved in cooperation with the relevant CEZ division. It is assumed that the doctoral student will be involved in solving research projects in this area (Eco&Store). Part of the doctoral studies will be an internship at a foreign research institution (the TalTech university is pre-negotiated).

   Tutor: Mastný Petr, doc. Ing., Ph.D.

8. Lighting systems reflecting non-visual effects of optical radiation

   With the development of technology, we are in a situation where we have enough products that could potentially improve the quality of lighting systems and streamline lighting processes in both indoor and outdoor spaces. Often referred to are biodynamic lighting, human centric lighting, adaptive and integrative lighting, or simply smart lighting. These terms are interpreted differently by the majority of the population and also by designers, marketers and implementation companies and often boil down to the mere control of the intensity and chromaticity temperature of light. However, this is only a basic part of the possibilities we have today. The seemingly well-studied area of the physiology of visual perception is now being significantly expanded by discoveries in the field of the effect of light on humans, namely in the area of biological processes. The influence of light has been demonstrated down to the molecular level and this important fact cannot be ignored in future technologies. At the same time, however, there is extreme pressure to save energy and to find ways to reduce the energy consumption of buildings, which does not exclude lighting technology. The topic of the PhD thesis will therefore address these seemingly contradictory requirements and look for ways to meet both requirements at the same time. Lighting technologies will have to respect not only energy, but also material and environmental issues. These aspects will also be addressed in the work. The result of the work should be a new vision of lighting solutions that motivates manufacturers and users to focus more on long-term solutions, more than short-term economic and energy efficient under very simplistic assumptions. For example, savings generated as a secondary effect in terms of improving public health or environmental conditions are difficult to quantify, but have a key impact on social behaviour. Research in this area would be a very useful basis for designers and implementers of lighting systems.

   Tutor: Baxant Petr, doc. Ing., Ph.D.

9. Novel calculation methods and procedures for earthing system design and measurement

   Presently, there is pressure from the electricity industry to refine the calculation of proposed grounding systems, especially for cases where difficult soil conditions are encountered. The current practice at national and partly international level is based on a simplified procedure using solution methods with coefficients of earth electrode utilisation. This procedure may be considered inappropriate for more complex arrangements of earth electrodes or their location in inhomogeneous soils. The analyses carried out on the current procedure suggest that there is not much further scope for refinement. However, in view of the current state of knowledge and the development of computer technology, it can be concluded that it is possible to solve the problem of the distribution of the earth electrode field by other more advanced methods. As a possible satisfactory solution, the creation of a software tool / computational methodology that would use a newer and more accurate procedure for determining the potential distribution in the vicinity of the earth electrode, e.g. based on the solution of the Laplace equation and the image charges (complex images method), the finite element method, etc. Considering the applicability of the results it can be concluded that the created methodology would represent an alternative method to the current simplified approach or even would be directly required from the entities operating in the electricity sector through inclusion in the national PNE company standards. Discussions are already underway on national level with representatives of electricity companies in this respect, where there is already a demand for a similar tool. This tool/methodology should also respect the Czech, and therefore European, harmonised normative environment. At the international level, the results obtained would then lead to the extension and refinement of some currently published procedures. In terms of further research potential, this topic allows for its development, for example, by extending it also with the probabilistic evaluation of earth electrodes, where this method is still rather experimental compared to the existing deterministic one. Nevertheless, an increased pressure in the future on the application of probabilistic evaluation can be expected. Another possibility for extending/measuring this topic is also by respecting the development in the field of more precise measurement of earth electrodes, and thus especially methods for measuring soil properties (soil resistivity), which is a key parameter determining the final properties of the constructed earth electrode. The use of methods from the field of electrical resistivity tomography, ground penetrating radar, etc. can be imagined here. Last but not least, with the development of artificial intelligence methods, it is also possible to use it, for example, for the analysis and assignment of soil model parameters from measurements, etc. - Analysis of currently used calculation and measurement procedures, the calculation requirements by the electrical utility companies. The analysis should be both on national and international (European) level. - Analysis and selection of adequate calculation method, selection of necessary input parameters. Analysis of appropriateness of selected solution and proposal of some improvements – recommendation on soil modelling, reinforced concrete earthing system modelling. - Design and development of computational methodology/tool. Selection and implementation of appropriate methods, complemented by probabilistic evaluation of earth electrodes, etc. The student is expected to undertake an internship at partner universities abroad, e.g. TU Graz, Aalto, or the University of Newcastle, etc., where international experts working on the topic are based. During the course his PhD studies the student

   Tutor: Vyčítal Václav, Ing., Ph.D.

10. Probabilistic approach for optimization of distribution system operation

    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. The condition for successful defense of this work is to complete at least one month long internship at a foreign university. At present, university of TU Graz (Austria) may be considered relevant, but the specific place will be updated during Ph.D. study period. The condition for successful defense of this work is to complete at least one month long internship at a foreign university. At present, the TU Graz (Austria) and Aalto University (Finland) may be considered relevant, but the specific place will be updated during Ph.D. study period.

    Tutor: Topolánek David, doc. Ing., Ph.D.

11. System for distribution network operation optimization

    The Ph.D. thesis is focused on the development of adaptive system for optimization of the low and medium voltage network operation with respect to: voltage level, reactive power flows, voltage unbalance, load flow, etc. The system itself will also ensure fault location inside such networks and automatic reconfiguration. Designed system will be utilizing information from monitoring and control devices that are intended for installation in the distribution system by the operator (smartmetering, reclosers, smart DTS, etc.). To fulfill this task, a solution based on an opensource platform will be used, which will not exclude the integration of the proposed solution into dispatching control and planning systems in the future. The condition for successful defense of this work is to complete at least one month long internship at a foreign university. At present, the Aalto University (Finland) may be considered relevant, but the specific place will be updated during Ph.D. study period.

    Tutor: Topolánek David, doc. Ing., Ph.D.

12. The voltage regulation in distribution networks with a high proportion of stochastic sources

    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. It is assumed that the doctoral student will be involved in solving research projects in this area (Eco&Store). The condition for successful defense of this work is to complete at least one month long internship at a foreign university (Tampere University is pre-negotiated).

    Tutor: Mastný Petr, doc. Ing., Ph.D.

2. round (applications submitted from 01.07.2024 to 31.07.2024)

1. Alternative Energy Systems in Concept of Sustainability

   The topic focuses on energy systems that offer high sustainability potential. Energy generation will continue to be the focus of modern society and with the advances in technology, it is clear that the current concept will need to be significantly modified towards renewable sources. However, the renewability of the resource is not the only condition. Future technologies will necessarily be developed with a view to material renewability and very low maintenance. However, it is not possible to rely solely on already produced technologies such as wind or photovoltaic power plants. Biomass, for example, offers great potential, but not in the form of direct combustion but using biodegradation processes. Resonant technologies based on the optimisation of energy flow and minimisation of transmission losses seem to be a very interesting and not yet scientifically explored area. This is not only electromagnetic resonance, but also mechanical resonance, even at the molecular or atomic level. A significant part of the work should therefore be devoted to the shape arrangement of the energy device and its influence on the resulting parameters. In this part the greatest experimental contribution of the work is expected. The direction of the work will be addressed after a thorough search of existing promising technologies.

   Tutor: Baxant Petr, doc. Ing., Ph.D.

2. Assessing the impact of wind turbines on light conditions at the installation site

   The effect of shadow flicker during the operation of wind turbines (the flicker effect) is one of the parameters studied in the context of the assessment of the impact of wind turbines on the health of the population. If there is an assumption of this impact extending into the residential area, a system is installed on the towers that can shut down certain towers at certain times of the day. At present, the windPRO programme is used for the calculation, but it does not take into account all the input parameters, and wind turbines with heights exceeding 250 m are being built today. The computer system mentioned above assumes the same impacts at distances greater than 1.5 km, which creates problems in practice. At distances greater than 1 km, however, massive shadow scattering occurs due to many phenomena. The last output on this topic is from 1999 https://www.fachagentur-windenergie.de/fileadmin/files/Akzeptanz/130_Pohl_Faul_Mausfeld_1999.pdf. It is important for project economics that plant shutdowns only occur when there is a real risk of direct impact in the built-up area. For this reason, a sophisticated system needs to be developed that takes into account all the parameters that may enter into this phenomenon, so that shutdowns do not occur in cases where this phenomenon does not realistically occur. Within the topic, the student will address this issue in such depth that either existing or new computational programs can be developed to determine the effects of wind turbines in a given area.From the point of view of calculations in lighting technology, this is a rather complicated system and cannot be solved in a simple way. The propellers create a dynamic system of obstacles, daylight and especially the position of the sun create a unique light scene for every time of day, season and place on the planet, and terrain and obstacles are added to this. A comprehensive solution will require a research effort with a long-term exposure to the field, and results can be expected within the length of a PhD study.

   Tutor: Baxant Petr, doc. Ing., Ph.D.

3. Design and development of alternative partial discharge meters and indicators for high voltage equipment

   - Carry out an analysis and search of current principles and alternative solution of partial discharge measurement, - find suitable solutions or a combination of sensors on the basis of sensitivity measurement, determination of the nature of the fault, detection of the fault location and complexity of the solution, - implement own design and laboratory verification of functionality and range of parameters in shielded cells, - implement own, especially alternative principles of partial discharges measurement to indicators and fault meters in HV equipment. As part of the doctoral studies, an internship at the Technical University of Košice, Slovakia is foreseen.

   Tutor: Krbal Michal, Ing., Ph.D.

4. Design of Parametric Autonomous Power Supply System to Enhance Electric Vehicle Charging Infrastructure

   In the course of the 20th century, the Czech Republic and Czechoslovakia were electrified, thanks to which electricity from a common grid was introduced to every town, village or hamlet. Electrification also took place in the mountains and less accessible border areas. As there was not previously such a demand for reserved power and grid capacity, these lines are often insufficient and the capacity of the lines needs to be reinforced. However, in border and mountainous areas, several factors are now complicating this reinforcement, namely inaccessibility due to terrain or the cost of building the network is so high that it is not worth the investment due to low availability. For this reason, network capacity expansion projects are often rejected. The object of this work would be to design a parametric autonomous system that could provide the power supply requirement to reinforce the current infrastructure and at the same time allow the development of electromobility. The system would use electricity supplied from the distribution grid in the available capacity, supplemented by electricity generation from other local sources available today, such as photovoltaic, wind or small hydro power, or small biofuel CHP units. The correct sizing of the individual system elements leads to an optimal return on investment, not only financially, but also in terms of energy and materials. The use of artificial intelligence systems such as neural networks would be very beneficial.

   Tutor: Baxant Petr, doc. Ing., Ph.D.

5. Electrical machines with electronic pole-switching

   A wide range of electric machines are used for electric traction nowadays and with the growing importance of e-mobility, there is an increasing demand for further research and development. For electric traction, it is advantageous if the electric machine itself, without a gearbox, can provide high torque at low speeds as well as a wide speed range. The absence of a gearbox leads to material savings, higher reliability, smaller footprint and ultimately a reduced environmental impact. The proposed research topic addresses this challenge by aiming at the research and development of electrical machines with electronically switchable pole counts with the potential to achieve the above mentioned characteristics. The topic is expected to include the development of a simulation framework for this machine, the research and development of suitable configurations of stator winding designs and the investigation of dynamic phenomena during pole number switching. The results of the research and development will be verified by measurements on a prototype pole-switching machine to be developed during the course of this topic. The obtained outputs will be regularly published at conferences and in high-level journals.  During the research and development on this topic it will also be possible to consult the results with the staff of AVL Moravia s.r.o., the Linz Center of Mechatronics GmbH and JKU - Johannes Kepler Universität Linz, Institut für Elektrische Antriebe und Leistungselektronik, where a compulsory foreign internship of a PhD student is also expected.

   Tutor: Bárta Jan, doc. Ing., Ph.D.

6. Electromobility in Concept of Smart Technologies in Energy Sector

   The topic is focused on research into the potential of electric vehicles or electric vehicles of all kinds in the context of smart technology implementations. Electric mobility is ushering in a new era of development worldwide, not only in the field of mobility but also in the field of information technology and energy systems. The electric car today integrates a range of powerful technologies and it is clear that its connectivity to the environment will continue to grow. Full internet connectivity is now commonplace and autonomous driving is becoming standard. But since these vehicles will require energy to operate, a complete infrastructure of charging stations will need to be addressed. However, the dissertation would address how electric vehicles can be further improved in terms of e.g. bidirectional energy flow, sharing of energy and power potential, simultaneous operation of multiple vehicles, integration into smart cities, use of renewable resources - storage and monitoring, networking of vehicles, efficient resource sharing, etc. In the first part of the study, the student would implement a detailed measurement and monitoring system that would allow real-time monitoring of the selected vehicle and evaluation of the most important parameters. In the second part, the student would work on the use of measured data and resource sharing in smart technologies, e.g. availability of electricity sources and RES potential at a given moment. The expected output of the work would be a functional concept on a smaller scale with links to the global platforms that are now being built worldwide.

   Tutor: Baxant Petr, doc. Ing., Ph.D.

7. High power density magnetic gear

   In relation to new materials, magnetic gears are becoming increasingly competitive with conventional mechanical gears, especially in connection with regulated electric drives. However, there is a need to further increase the achievable power density and efficiency. Efficient cooling and design are also essential. As part of the doctoral studies, the student will undertake an internship at a foreign university of a minimum duration of one month at JKU Linz.

   Tutor: Vítek Ondřej, doc. Ing., Ph.D.

8. Integrated Glare Metric for Various Lighting Applications

   Glare is a negative state of human vision that causes not only unpleasant feeling but also have negative influence on the performance of human vision system. For the glare evaluation there are many equations that are always used for specific application. For interior lighting systems it is used metric UGR. For glare evaluation caused by daylight from windows it is used metric DGP, DGI etc. However, there are disadvantages of these metrics. They are adapted for specific type of lighting system (e.g. offices, sport grounds, street lighting etc.) and specified for typical luminaires (e.g. luminaires with fluorescent lamps and opal diffusor, daylight windows etc.) However, they are all based on empirical data and therefore not on the physiological and psychological model. From this reason it is not possible to use these metrics to new aplications. This problem occurs especially in the current situation, where LED technologies started to dominate the market. The LEDs radiate from the very small surface and with the specific spectrum. The task of this thesis is to partially find answer to question: “What is the physiological and psychological mechanism that is responsible for unpleasant feelings caused by higher luminance”. On the basis of this mechanism the model of discomfort glare caused by high contrasts should be carried out. This model should be generalized and used in lighting systems. This topic is highly supported by international commission for illumination CIE and it is classed within the 10 strategic research goals in lighting technology.

   Tutor: Škoda Jan, Ing., Ph.D.

9. Investigation of bremsstrahlung-induced reactions in reactor materials: implications for nuclear safety and material science

   Bremsstrahlung-induced reactions in reactor materials is a critical area of research with significant implications for both nuclear safety and material science. As high-energy charged particles interact with matter, they emit electromagnetic radiation known as bremsstrahlung, triggering secondary reactions within reactor materials. This phenomenon poses challenges in understanding radiation damage and optimizing material performance in nuclear reactors. Among others, the student will participate in the currently submitted basic research project "Investigation of (γ,xn) cross-section data in GDR region: Reactor & Astrophysical significance" and complete a mandatory internship abroad at the HZDR Dresden and possibly supplementary internships at KINGS University, Ulsan or MSU Baroda.

   Tutor: Mukherjee Surjit, Dr.

10. Loss modeling in the High-Speed converter-machine system

    High-speed electrical machinery finds applications in various fields like wastewater treatment, pump systems, and district heating, enhancing societal welfare. Improving electrical efficiency involves minimizing electromagnetic losses, but additional harmonic losses occur with pulse-width-modulated converters, which are not yet fully understood. A project aims to analyze, mitigate, and model these losses caused by PWM-supply high-frequency components, potentially leading to new methodologies for quantifying power associated with each harmonic component, optimizing frequency converters, understanding heat distribution, and more. This research is crucial for variable speed drive applications, particularly in high-power and high-speed machines, utilizing a unique 2 MW high-speed machine prototype equipped with active magnetic bearing technology. This post is offered as a collaboration between LUT School of Energy systemsn Finland with Brno University of Technology, Czechia. It is expected that the results will be presented in high-level journals. The student is expected to stay around half of the studies at LUT and another half in BUT. The typical costs of the working at abroad are covered by LUT.

    Tutor: Bárta Jan, doc. Ing., Ph.D.

11. Modert topologies and optimum control of inductive heaters

    SiC and GaN MOS-FETs enable to increase the working frequency of an inductive heater. The influence of the working frequency on the heating process will be researched in various practical cases. Also the influence of the working frequency on the losses of the working coil will be solved. Dominant influences of skin and proximity effects must be considered. The coil geometry chosen with respect to the specific application affects strongly the problems of coil losses. Not only an air-core coil will be solved but also a coil with a ferrite core (for example in specific inductive heaters for automotive body repairs). Also the choice of the characteristic impedance of the LC resonant tank will be solved (low- or high- impedance of the coil). This choice directly influences the problems of coil losses, its cooling, realization problems and also optimum choice of the power circuit topology. The possibilities of phase-shift control will be solved in the field of control. An internship at TU Linz in Austria is foreseen.

    Tutor: Vorel Pavel, doc. Ing., Ph.D.

12. Optimisation of the operation of charging stations with regard to the current load on the distribution network

    With the increase in the number of electric vehicles (EVs), there will be a significant increase in the requirements for the installation and connection of charging stations in public spaces as one of the ways to charge them. Particularly in larger cities with a higher proportion of older residential buildings, the necessary capacity in charging stations will have to be ensured in the coming years, where according to the current forecast of the development of electromobility in the Czech Republic (NAP SG), up to 150,000 slow (up to 22 kW) public charging points are expected to be needed in 2035 (high scenario). In order to ensure the smooth operation of distribution networks in residential agglomerations, it will therefore be necessary not only to find or create the power capacity for these purposes, but also to manage the charging process efficiently so as to avoid power outages due to local network overloading. The aim of this dissertation will be to find a suitable solution for controlling the charging station during EV charging with respect to the actual load distribution in the power distribution network, using the power metering and control technologies used at the present time. Part of the doctoral studies will include an internship at a foreign research institute.

    Tutor: Orságová Jaroslava, doc. Ing., Ph.D.

13. Optimization of plasma radiation transfer calculations

    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. The PhD student is expected to be involved in the GAČR project "DEVELOPMENT OF A DATABASE WITH COMPLETE SET OF THERMAL PLASMA PROPERTIES OF GASES WITH POTENTIAL TO REPLACE SF6 IN SWITCHGEAR", whose proposal was submitted in March 2024.

    Tutor: Aubrecht Vladimír, prof. RNDr., CSc.

14. Severe accidents of pressurized water nuclear reactors with advanced nuclear fuels

    The thesis deals with the implementation of data for Advanced Technology Fuel / Accident Tolerant Fuel into conventional, advanced and small modular pressurized water nuclear reactors. With the help of computational software, the student simulates the behavior of these fuels under operational, but especially abnormal and accident conditions, including severe accidents and under so-called design extension conditions (formerly beyond design basis accidents). The aim of the student's scientific work is to develop an advanced fuel model and to simulate selected accident scenarios for a selected nuclear facility. The contribution of the thesis will be a qualitative and quantitative evaluation of the contribution of advanced fuel to nuclear safety of existing and new nuclear units. During his/her thesis, the student will be involved in a research project (CANUT2: Prospective nuclear fuels for current and future nuclear power sources including small modular reactors (SMRs)) at the Department of Electrical Power Engineering, and will collaborate with an industrial partners (UJV Rez and FNC Technologies) and a foreign partners (KINGS University, Ulsan; FNC, Suwon; and possibly with UT Knoxville and/or Texas A&M). The obligatory foreign internship is going to be held at KINGS.

    Tutor: Mastný Petr, doc. Ing., Ph.D.

15. Study of delayed neutrons production in advanced power reactor systems by activation method

    Delayed neutrons play a crucial role in reactor kinetics, safety, and control. Understanding their behavior and detailed production is an important issue for reactor operation, safety assessment, and nuclear non-proliferation efforts. This research employs experimental and computational techniques to characterize and analyze delayed neutron emissions especially in the core of advanced nuclear reactors with significantly harder neutron spectra and various mixture of fuel isotopes. As part of his/her research, the student will participate in the investigation in the frame of the CANUT2 project: Emission-free technologies for local energy sources replacement project and take part in the international cooperation of the Nuclear Power Group team. As part of his/her studies, he/she completes an obligatory foreign internship at KINGS University, Ulsan; MAHE Udupi or IMP Lanzhou.

    Tutor: Mukherjee Surjit, Dr.

16. Utilization of real-time simulation for advanced protection systems design

    New technologies of power system behavior research during transient phenomena open the area of advanced analysis focused to large protection systems operation during faults. The main aim of this dissertation is to extend possibilities of real time simulator RTDS about simultaneous tests in real time including real devices – hardware in the loop simulation. An internship at foreign university is included.

    Tutor: Toman Petr, prof. Ing., Ph.D.

1. round (applications submitted from 01.04.2024 to 30.04.2024)

1. Advanced optimization strategies for building energy management system

   The topic of energy flows in the buildings is actual in particular in terms of minimizing operating costs. Mutual interaction of renewables, storage and management systems brings new possibilities for savings and complex question of optimizing the management of this system is a challenge for the future standard for sustainable building operation. The aim is to analyse the capabilities of current systems for control and visualization BEMS (Building and Energy Management), the possibilities of using renewable energy sources (RES) and energy storage for energy efficiency and possibilities of UNS, Fuzzy Logic and GA in the management of buildings. Furthermore, to propose an algorithm for optimal control of BEMS to minimize operating costs with consideration of external factors (weather prediction, movement, interaction with buildings in the area). Proposed algorithm will be experimentally verified in a real environment. An internship at foreign university is included.

   Tutor: Toman Petr, prof. Ing., Ph.D.

2. Control of multi-phase fault-tolerant AC drives

   Multi-phase fault-tolerant AC drives currently represent a major trend in the field of electric drives with safety requirements, especially in aviation. Synchronous (both PMSM and BLDC) and induction machines with five-/six-phase windings or dual three-phase windings are relatively common, but many other topologies exist. The main challenge for multi-phase drives is to implement a control strategy when a fault exists in one or more inverter phases, in one or more current sensors or in the position sensor (sensorless control). In the doctoral thesis, an analysis of control methods for multi-phase AC drives of various topologies during various fault-states will be conducted. For one or more selected motor topologies, the design and construction of a power converter (two- or multilevel) and control electronics utilizing a microcontroller or a programmable gate array will be performed, including development of a control algorithm for the drive. The aim will be to create a robust control that is to some extent tolerant to faults of power electronics and both current and position sensors. The obtained outputs will be regularly published at conferences and in high-level journals.  During the research and development on this topic it will also be possible to consult the results with the staff of AVL Moravia s.r.o., the Linz Center of Mechatronics GmbH and JKU - Johannes Kepler Universität Linz, Institut für Elektrische Antriebe und Leistungselektronik, where a compulsory foreign internship of a PhD student is also expected.

   Tutor: Bárta Jan, doc. Ing., Ph.D.

3. Investigation of Unknown Radioactive Nuclides Through Experimental Data Analysis at the FRS Facility

   This PhD thesis aims to explore the structure of the previously unknown carbon radioisotopes, which emerges as a fragmentation product of a beam interacting with a beryllium and other break-up and spallation targets at the FRS (Fragment Separator) facility of GSI (Gesellschaft für Schwerionenforschung). This PhD thesis offers an exceptional opportunity to contribute to cutting-edge basic research in between of nuclear physics and nuclear engineering, involving hands-on experience with advanced experimental setups and data analysis techniques. The student will gain invaluable expertise in the field, positioning them well for a career in scientific research and academia. Topic is solved within the Accelerator Driven Systems (ADS) investigation within international collaboration with various domestic and foreign partner institutions (NPI ASCR, GSI, Polish, Slovak, and Indian universities). The ADS could be used for basic research in the field of nuclear reactions and new radionuclides production. Among others, student will be involved to the submitted project “Investigation of (γ,xn) cross-section data in GDR region: Reactor & Astrophysical significance” and is going to take part in the obligatory internship at GSI Darmstadt and possibly supplementary ones at Warsaw University of Technology and Comenius University Bratislava.

   Tutor: Mastný Petr, doc. Ing., Ph.D.

4. Monitoring, diagnosis and prediction of power quality

   The paradigm of electrical network (EN) operation with connection and customer behaviour at different levels of the distribution system (DS) is changing. The transition can be characterized by a move away from central generators in the transmission system (TS) to the integration of distributed generation into the HV and LV DS; the installation and operation of related technologies and equipment in these systems to meet the sub-economic and technical objectives of DS users; and efforts to transfer part of the DS customers to direct TS users. One of the challenges across Europe is the implementation of VQ monitoring, diagnosis and prediction for PS. Increasing the knowledge in terms of voltage quality is an important prerequisite for the future connection of new renewable energy sources and for improving the security of the power system operation. The aim is to develop and apply innovative approaches to power quality assessment at the transmission system level. It targets two main objectives. 1) The development of new innovative power quality monitoring and diagnostic tools for off-line and on-line assessment and prediction of voltage quality trends in the critical timeframe of one week. 2) Research and development of analytical tools for locating a disturbance source in the power system, which is essential for determining the disturbance origin and follow-up actions. The topic is part of the TS01020151 project proposal for A new generation of power quality monitoring, diagnosis and prediction tools. Collaboration with TSO, and international scientific cooperation are foreseen. Part of the PhD studies includes an internship at a foreign research institute, e.g. TU Dresden, DE. Information: drapela@vut.cz.

   Tutor: Drápela Jiří, prof. Ing., Ph.D.

5. Optimization, minimization and recycling of radioactive waste from nuclear power plants

   Low and intermediate level radioactive waste is produced in various forms after as well as during the operation of a nuclear power plant. These wastes have to be characterized, segregated, treated and disposed of in a designated repository or released to the environment, if their nature and legislation permit. The objective of any nuclear power plant operator is to minimize the quantity of such waste and thus the use of the repository, the burden on the environment, but also to optimize the management of this waste in order to reduce the radiation exposure of the workers who handle it. New calculation and measurement methods, processing techniques, automation, artificial intelligence, etc., will enable significant progress to be made in this direction. The aim of the work is to carry out research and development in the field of management of low and intermediate level radioactive waste, in particular contaminated insulation and radioactive plastic waste, including mapping the latest global trends in the management of defined types of radioactive waste and related legislation, and proposing innovative ways to optimize and in particular recycle selected specific types of waste. During the PhD studies, the student will participate in the projects of the CANUT2 Centre, cooperate with MIFRE ENERGY, Ltd., ČEZ, Plc., scientific and academic institutions in the Czech Republic and abroad (SURO, v.v.i., FNSPE CTU in Prague, STU Bratislava, IAEA Vienna). Practical internship abroad is going to take place at JAVYS, a.s. (Jadrová a vyraďovacia spoločnosť, Plc., Jaslovske Bohunice, Slovakia), EWN (Entsorgungswerk für Nuklearanlagen Ltd., Greifswald, Germany), and PreussenElektra Ltd. (Isar, Germany).

   Tutor: Mukherjee Surjit, Dr.

6. Power system stability in islanded operations

   This topic focuses on the stability assessment of island operations, with the preparation of suitable dynamic models, together with the identification of their parameters, and the provision of the necessary data, as a partial objective, and a necessary basis for the analyses. Focus is put on the basic areas of power system stability, i.e. mainly frequency stability for different island operations, and voltage or rotor angle stability for specific island operations. In terms of dynamic modelling, response of new technologies to support the grid and their use to improve the situation should be considered. This includes in particular charging stations for electric vehicles or other modern technologies entering the market or being researched for grid support. The student will have the opportunity to complete an internship at TU Graz - Institute of Electrical Power Systems or an internship at the transmission system operator Entso-e.

   Tutor: Bátora Branislav, Ing., Ph.D.