Issued topics of Doctoral Study Program:|
- Advanced Diagnosis of Middle and High Voltage Power Cables
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.
- Advanced molten salt reactors calculation analyses
Nuclear reactors with coolant and/or fuel based on molten fluoride/chloride salts are perspective generation 4. systems, which may be designed as small modular reactors and can bring challenging safety and operation features to the nuclear power engineering. The Czech Republic has joined (again) group of countries which are investigating MSR, through CVR initiative called Energy Well. Molten Salt reactors can also be used as thorium and/or spent fuel transmutors. Student will deal with various calculations methods and will study MSR system, particularly using CFD (e.g. OpenFoam) and Monte Carlo methods. Objective of the work will be the detailed description and modification of MSR calculation methodology.
- Advanced Nuclear Fuels
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. Research will be performed within cooperation with Faculty of Mechanical Engineering of BUT.
- Analysis of switching phenomena of semiconductor devices in power electronics
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.
- Centralized protection system for distribution network
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.
- Conditions for the implementation and operation of stochastic power sources up to 10 kW in the Czech Republic - arrangements for the limit the effects of power quality
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.
- Conducted disturbances in power systems in audio-frequency range
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). Ask for more details at firstname.lastname@example.org.
- Control and Protection on AC/DC Hybrid Microgrids
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.
- Control techniques for high speed machines
Analysis of advanced control techniques for high speed electric machines. Design of novel control techniques with respect to maximal efficiency and minimizing of computational performance.
- DC Power Systems Voltage Quality
With increasing number of DC power network related applications, necessity of the power/voltage quality assessment in those DC Power Systems can be expected. The aim of the work is to develop DC voltage quality indices starting from DC traction systems and AC public distribution systems voltage quality assessment practice. The theme takes a part of a research project in cooperation with K M B systems company. More information: email@example.com.
- Design and optimization of assisted high torque reluctance motor
Research and development of synchronous reluctance assisted motors (SRAM) was very intensive in the last 20 years. The sharp increase of the price of rare earth permanent magnets used in surface mounted permanent magnet machines evoked interest in the research of SRAM machines in which the earth rare magnets are replaced by cheaper ferrite magnets. The SRAM machines have special air ducts in the rotor serving as magnetic barriers. These barriers have to be carefully designed to get maximum efficiency. Optimization of the whole machine is necessary after that. The aim of the PhD thesis is the optimization of high torque low speed SRAM. The prototype of the machine will be developed and the results obtained from the measurement will be compared with the theoretical analysis. The research is supported with the TACR project and cooperation with Baumueller Company.
- Development and optimization of protection functions for precise electronic current and voltage transducers
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.
- DIAGNOSIS OF ELECTROMECHANICAL SYSTEMS AND IMPROVING THEIR OPERATING PARAMETERS
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.
- Electric power and energy components definition and measurement in future distribution systems
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. Ask for more details at firstname.lastname@example.org.
- Electromobility in Concept of Smart Energy Technologies
The theme is focused on research into the potential of electric vehicles, respectively general electric vehicles of all kinds within the framework of the implementation of smart technologies called “Smart”. Electromobility is launching worldwide in a new era of development not only in the area of mobility, but also in information technology and energy systems. Electric today integrates a wide range of powerful technologies and it is evident that the connectivity of the area will continue to increase. Routine is now full internet access and getting standard autonomous control of vehicles. However, since these vehicles will require energy to run, we will need to deal with the entire infrastructure of charging stations. As part of the dissertation, however, dealt with ways of electric vehicles continue to improve in terms of eg. reversible flow of energy, sharing energy potential and performance, concurrent operation of multiple vehicles, integration into smart cities, renewable - accumulation and monitoring, networking of vehicles , efficient sharing of resources. Student would be in the first part of the study implemented a detailed measurement and monitoring system that would allow monitoring of selected vehicles in real time and evaluate the most important parameters. In the second part would be working on the use of measured data and resource sharing in the context of smart technologies, eg. availability of electric power and potential of RES in the moment. The anticipated outcome of this work should be functional concept of small range model with connection to a global platforms, which are now being built worldwide.
- Fault Location in 110 kV Distribution Networks
Currently, the distance relay are only used for 110kV line protection, which have also the function of the fault locator. These relays can fairly accurately and reliably determine the faults distances only assuming of homogenous parameters of protected lines over their entire lengths that are also used to set the locator. This assumes that there are identical phase and earth conductors used in the entire length of the line and the complete conductors transposition is provide. In a real network, this condition is fulfilled only rarely and numerous other negative effects associated with the 110 kV networks operation affects the fault locator function - "T" feeders for the connection of source or load, double circuit line, parallel line in one corridor with protected line, etc. The aim of the dissertation is clearly identifying the negative effects on the fault locator function and create localization algorithm, which will respect them and allow more accurately determine the fault location.
- High-speed permanent magnet synchronous machines
Research of the high-speed electrical machines is in the center of interest of many universities and enterprises over recent decades. Beside the induction machines, the permanent magnet synchronous machines are one of the most frequently used type of machines in this area. The aim of this topic is to define a crucial areas of design, 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.
- Charging stations for electric vehicles as an element of electricity system
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.
- Chromatic flicker perception modeling in flickermeters
Visible light variation may leads to disturbance of human’s visual perception. The origin of such negative effect is in the eye anatomy and physiology. The major influence on the flickering light perception can be found in eye viewing field, photoreceptors (cones of three types and rods) and their distribution at retina as a part of eye anatomy and in eye adaptation mechanisms like pupil, photo-chemical and neural adaptation (response) to luminous variations (including the photoreceptors spectral luminous efficiency) as a part of eye physiology. The human eye can be seen as specialized luminance multi-detector where the stimulation contrast is as important as radiant density. There are differentiated three types of flicker: temporal, spatial and chromatic. All of these flickers are joyless and may involve many psychological interactions. In artificially illuminated areas, lamps light variations due to variations in supply voltage may also lead to flicker perception. Such lamp possibly will produce light with time-varying radiant flux and its spectral distribution. The lamps flickering is produced by a voltage Phase Modulation (PM), mainly by Phase Jumps (PJ) and by Interharmonic Voltages (IH) superimposed on a voltage waveform.
Thesis is focused on the voltage fluctuation to lamps time-varying radiant flux and its spectral distribution fluctuation transfer analysis and on the utilization of the analysis results for development and realization of an objective flickermeter having response to both the temporal luminance and chromatic flicker. The thesis aim is the realization of the new flickermeter types implemented in LabVIEW, with the experimental verification. The thesis covers theoretical-analytical, developmental and also practical-experimental part of study.
More information: email@example.com.
- Induction motor with full rotor
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.
- Induction motor with massive rotor
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.
- Investigation of accelerator driven nuclear reactor
The thesis objective is to investigate applicability and properties of accelerator driven nuclear reactor as special neutron source on the one hand, as well as system for thorium, depleted uranium or spent fuel transmutation on the other hand. Student will not only study neutron field of the system and reaction rates of transmutation reactions, however, mainly physical properties of the system, heat generation and balance, inventory, design options, etc. One of the goals is to perform the feasibility study of an accelerator driven small modular reactor with molten salt.
- Islanding operation of distribution systems with distributed generation
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. For more information email to: firstname.lastname@example.org.
- MEASUREMENT OF PHYSICAL QUANTITIES FOR THE ROTATING PARTS
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.
- Modelling of phenomena in electrical arc
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.
- Modern methods of electrical machine parameter estimation
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.
- New functionalities of electronic energy meters operated under SmartMetering concept
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.
- Nuclear data for light water reactors safety analyses
Uncertainties of nuclear facilities’ safety analyses are dependent also on input nuclear data. Student will work with nuclear data databases, will implement uncertainties into models, and work on sensitivity analyses, analyses of temperature influence on nuclear data; deal with calculation stability. Student will modify special purpose libraries from general ones (using special calculation codes). The goal of student’s work is to develop a robust system for nuclear data influence evaluation to the reactor core (spent fuel ponds, spent fuel casks, etc.) calculations. Student will deal on detail temperature analysis using CFD codes, with modification of nuclear data for specific temperatures; will use script languages as well as codes based on Monte Carlo method.
- Optical diagnostics of electric arc
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.
- Optimization of energy management of buildings with renewable energy sources.
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.
- 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.
- Photometry of daylight distribution components
Topic of study is focused on evaluation of components designed for daylight distribution in interior space of buildings. Primarily this research is dedicated on light tubes where photometry is significantly dependant on shape of optical path. Photometric output characteristics are moreover influenced by material properties of used components, their overall length, and shape of light tubes and also by parameters of input light. Considering high variability of building these light systems it is difficult to predict output photometric parameters. Thus the aim of study should be in finding appropriate description which can be applied in sufficiently accurate prediction of output photometric quantities e.g. luminous efficacy, luminous intensity distribution or spectral power distribution. On the basis of this description it should be possible to design light systems using a great share of daylight which should lead to lower energy consumptions of light system.
- Power system with electric energy accumulation
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.
- Probabilistic approach for evaluation of safety criteria of earthing systems
The dissertation will be focused on research of a new approach for evaluation of safety criteria of earthing systems base on calculation and evaluation of probability of ventricular fibrillation of persons located in the evaluated earthing system area. The methodology will be based on both 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 calculating the earth fault levels, fault duration and frequency of fault presence, 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 and touch and fault coincidence.
- Raditive heat transfer in electric arc plasmas
Solution of energy balance in an arc plasma with respect to the radiative heat transfer. Influence of various spectral intervals and various molecular species on the radiative heat transfer in the arc plasma. Development of computer code for calculation of absorption coefficients of given thermal plasmas.
- Research of discomfort glare of non-uniform luminaires
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.
- Small and special electromotors
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.
- Small Induction Motors with Lower Energy Intensity
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.
- STUDY OF DYNAMIC PROPERTIES SLIDING CONTACT
The theme includes issues of sliding contact in high-end applications of electromechanical systems operating in dynamic operating conditions
(Starting, regulation, etc.) with high ratings of current, voltage, speed, power, speed, and defined the parameters of the surrounding environment.
Since the development of electromechanical systems in particular is currently associated with a requirement for high reliability and durability as defined, should be to extend the life of work sliding contact, reducing degradation of the stationary and moving parts of the sliding contact, eliminating the influence of the surroundings on the current flow between the stationary and moving part of the sliding contact. Partial information will be obtained during the analysis and field current.
- System for monitoring of power quality and energy power flows in buildings with renewable energy sources.
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.
- Test system for evaluation of electronic current and voltage transducers
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.
- The influence of lighting technology on the environment
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.).
- The island DC network for objects with renewable energy sources
Conceptual solution of an island DC networks where resource base consists of hybrid energy system (photovoltaic, wind turbine, accumulation). The goal is to propose a technical solution of energy system enabling in case of lack/excess energy cooperation with AC network and simultaneously ensure the safe power to the object. The solutions will be also the design and testing of control and monitoring algorithm.
- The possibilities of frequency control in new generation of electrical networks
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.
- The Protection Systems in Distribution Network with Substantial Proportion of Distributed Generation (DG)
Integration of large scale renewable energy sources and small size generating facilities into the electricity structure will require new electricity grid structures and new strategies for their operation and control to ensure efficiency, security, sustainability, reliability and high quality power supplies. It can be assumed that the distribution networks will be addressed:
• the change of power flow direction - protection of distribution networks will develop to become more similar to transmission systems,
• new protection algorithms able to cope with the lower short circuit currents in the system because of the greater contribution of converter based generators,
• new automation applications of DG connected to the distribution network - control capabilities, reconfiguration, synchronization and reclosing,
• development of powerful communication networks in the distribution system with data integration based on the standard IEC 61850 communications,
• reliable islanding detection and intentional islanding capability.
- 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.
- Usage of modern switching devices in power electronics
The main objective of doctoral thesis is an analysis of specific problems in high voltage converter technique.
Main aim of work is an construction of function sample of high output power sources for research purpose.
- Use of the cooperation of energy storage and renewable energy systems to support the distribution network operation
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.
- Using of the partial discharge for identification of fault in distribution networks
The power system reliability is high priority of present society. The main aim of the thesis is the analysis of present methods of condition evaluation of distribution network equipments and using the got information for fault detection in distribution networks. The example could be worse insulation state of transformers, bushings, single phase fault in line with covered conductors etc.
- Utilization of advanced revenue meters for distribution systems control and automation
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.
- Vibration diagnostics of electrical machines
The theme is focused on the measurement and vibration analysis of electric machines. Specifically, the diagnostic spectrum measured vibration acceleration amplitudes and asynchronous motors. The main objective is to create a method based on neural networks, which has to recognize various types of failures of electrical machinery and enable their prediction.