Power Electrical and Electronic Engineering
FEKTAbbreviation: PPA-SEEAcad. year: 2018/2019
Programme: Electrical Engineering and Communication
Length of Study: 4 years
Accredited from: 25.7.2007Accredited until: 31.12.2020
The goal of the postgradual doctoral (PhD) study is the education for scientific work in the area of power electrical engineering and power systems. Graduates of PhD find occupation either as scientific or research workers including industrial development, either as universty teachers and in higher manager functions as well
Key learning outcomes
PhD-graduate obtains high theoretical knowledge and will learn to solve complicated scientific and technological problems by oneself
Occupational profiles of graduates with examples
The graduate obtains broad knowledge of subject of high power engineering. The knowledge is build mainly on theoretical background of the subject. Moreover the graduate will obtain deep special knowledge aimed in direction of his/her thesis. The graduate will be able to perform scientific and/or applied research based on up to date theoretical knowledge. The graduate will be able to organize and lead a team of researchers in the studied subject.
Issued topics of Doctoral Study Program
2. round (applications submitted from 01.07.2018 to 31.07.2018)
- 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). An intership at a foreign research institution, for instance TU Dresden, DE, is expected. 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.
Tutor: Toman Petr, doc. Ing., Ph.D.
- 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. An intership at a foreign research institution, for instance Università degli Studi della Campania "Luigi Vanvitelli", is expected. More information: email@example.com.
- 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. An intership at a foreign research institution, for instance Università degli Studi della Campania "Luigi Vanvitelli", is expected. Ask for more details at firstname.lastname@example.org.
- 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. An intership at a foreign research institution is expected. More information: email@example.com.
- 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. An intership at a foreign research institution, for instance Università degli Studi della Campania "Luigi Vanvitelli", is expected. For more information email to: firstname.lastname@example.org.
- Modeling of current interruption in electric fuses
Electric fuses are protection elements widely used in low- and medium voltage power distribution networks. Fuses are typically designed to have fuse elements as segmented thin metal conductors that are embedded in silica sand. Due to over currents and short circuit currents the fuse elements are heated up and melted, an electric arc is ignited. Thus the mode of operation can be separated into a pre-arcing and a arcing phase. In the arcing phase the generated plasma is interacting with the filler medium (sand) and the fault energy is stored in the sand, leading to melting of the sand. The morphometric properties of the filler have an influence on the arc plasma, e.g. the plasma composition, thermodynamic and transport properties. The approach for this thesis is to first identify existing modeling approaches and evaluate from a numerical and result quality point of view. Starting point are existing arc models that are developed mainly for atmospheric gas discharge, but have limited validity in this application. As a second step a suitable model should be adopted or implemented and the identified model shortcomings should be addressed. The necessary transport, thermodynamic and absorption coefficients for the metal vapor and silica sand mixture need to be gathered. As a third step the model is applied to predict the interruption process for a specified fuse. By means of comparison of test results and simulation results the model accuracy and sensitivity is evaluated. This thesis will include close cooperation with Eaton. The student is expected to spend at least one month internship in Eaton.
Tutor: Kloc Petr, Mgr., Ph.D.
- Modeling of switching arcs in mineral oil
Mineral oil is used as an insulation medium in medium voltage power distribution equipment, like transformers or pad mount switchgear. In different applications switching is performed by means of electromechanical contacts that are submerged in mineral oil. During contact opening, an electric arc is formed and energy is transferred into the mineral oil, mainly by heat conduction and radiation. As a result, mineral oil is vaporized and gas bubbles are formed that are interacting with the oil. Close to current zero, the gas bubble starts collapsing since the energy input is decreasing. This will change the plasma conditions like pressure and temperature, which influences the plasma decay and therefore the dielectric recovery. The main goal of the thesis is to develop and implement a stable and performant multiphase flow solver in order to be able to simulate the complex interactions that occur during arc switching/arc interruption in mineral oil. This includes the modeling of phase change (oil oil vapor) and determining the necessary thermodynamic, transport and radiation properties. Starting point are existing arc models that are developed mainly for atmospheric gas discharged, but have limited validity in this application. In a second step the processes during recovery should be investigated, since a prediction of successful interruption is determined by the rise of transient recovery voltage vs. dielectric recovery. In a third step the model accuracy and sensitivity is evaluated by comparison with actual test results. This thesis will include close cooperation with Eaton. The student is expected to spend at least one month internship in Eaton.
Tutor: Kloc Petr, Mgr., Ph.D.
- 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.
- The identification of power system faults
New technologies of measurement and communications bring new possibilities of synchronous measurement of faraway substations. The main aim of research is detailed analysis of Electrical values during power system faults and proposal of method for their identification.
Tutor: Toman Petr, doc. Ing., Ph.D.
- 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.
- 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.
Tutor: Toman Petr, doc. Ing., Ph.D.
- 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 equipment and using the got information for fault detection in distribution networks. The example could be worse insulation state of transformers, grommets, single phase fault in line with covered conductors etc.
Tutor: Toman Petr, doc. Ing., Ph.D.
- 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. An intership at a foreign research institution, for instance TU Dresden, DE, is expected. For more information email to: email@example.com.
1. round (applications submitted from 01.04.2018 to 15.05.2018)
- 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.
- 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.
Tutor: Toman Petr, doc. Ing., Ph.D.
Course structure diagram with ECTS credits
|DBM1A||Advanced methods of processing and analysis of images||en||4||Optional specialized||DrEx||S - 39||no|
|DTK2A||Applied cryptography||en||4||Optional specialized||DrEx||S - 39||no|
|DET1A||Electrotechnical materials, material systems and production processes||en||4||Optional specialized||DrEx||S - 39||no|
|DFY1A||Junctions and nanostructures||en||4||Optional specialized||DrEx||S - 39||no|
|DEE1A||Mathematical Modelling of Electrical Power Systems||en||4||Optional specialized||DrEx||S - 39||no|
|DME1A||Microelectronic Systems||en||4||Optional specialized||DrEx||S - 39||no|
|DRE1A||Modern electronic circuit design||en||4||Optional specialized||DrEx||S - 39||no|
|DAM1A||Selected chaps from automatic control||en||4||Optional specialized||DrEx||S - 39||no|
|DVE1A||Selected problems from power electronics and electrical drives||en||4||Optional specialized||DrEx||S - 39||no|
|DTE1A||Special Measurement Methods||en||4||Optional specialized||DrEx||S - 39||no|
|DMA1A||Statistics, Stochastic Processes, Operations Research||en||4||Optional specialized||DrEx||S - 39||no|
|DJA6A||English for post-graduates||cs||4||General knowledge||DrEx||Cj - 26||no|
|DMA2A||Discrete Processes in Electrical Engineering||en||4||Optional specialized||DrEx||S - 39||yes|
|DME2A||Microelectronic technologies||en||4||Optional specialized||DrEx||S - 39||yes|
|DRE2A||Modern digital wireless communication||en||4||Optional specialized||DrEx||S - 39||yes|
|DTE2A||Numerical Computations with Partial Differential Equations||en||4||Optional specialized||DrEx||S - 39||yes|
|DTK1A||Optimization Methods and Queuing Theory||en||4||Optional specialized||DrEx||S - 39||yes|
|DET2A||Selected diagnostic methods, reliability and quality||en||4||Optional specialized||DrEx||S - 39||yes|
|DAM2A||Selected chaps from measuring techniques||en||4||Optional specialized||DrEx||S - 39||yes|
|DBM2A||Selected problems of biomedical engineering||en||4||Optional specialized||DrEx||S - 39||yes|
|DEE2A||Selected problems of electricity production||en||4||Optional specialized||DrEx||S - 39||yes|
|DFY2A||Spectroscopic methods for non-destructive diagnostics||en||4||Optional specialized||DrEx||S - 39||yes|
|DVE2A||Topical Issues of Electrical Machines and Apparatus||en||4||Optional specialized||DrEx||S - 39||yes|
|DQJAA||English for the state doctoral exam||cs||4||Compulsory||DrEx||yes|