Power Electrical and Electronic Engineering
FEKTAbbreviation: PKA-SEEAcad. year: 2017/2018
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
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
- 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.
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.
Tutor: Kloc Petr, Mgr., Ph.D.
Course structure diagram with ECTS credits
|DBM1A||Advanced methods of processing and analysis of images||en||4||winter||Optional specialized||DrEx||yes|
|DTK2A||Applied cryptography||en||4||winter||Optional specialized||DrEx||yes|
|DET1A||Electrotechnical materials, material systems and production processes||en||4||winter||Optional specialized||DrEx||yes|
|DFY1A||Junctions and nanostructures||en||4||winter||Optional specialized||DrEx||yes|
|DEE1A||Mathematical Modelling of Electrical Power Systems||en||4||winter||Optional specialized||DrEx||yes|
|DME1A||Microelectronic Systems||en||4||winter||Optional specialized||DrEx||yes|
|DRE1A||Modern electronic circuit design||en||4||winter||Optional specialized||DrEx||yes|
|DAM1A||Selected chaps from automatic control||en||4||winter||Optional specialized||DrEx||yes|
|DVE1A||Selected problems from power electronics and electrical drives||en||4||winter||Optional specialized||DrEx||yes|
|DTE1A||Special Measurement Methods||en||4||winter||Optional specialized||DrEx||yes|
|DMA1A||Statistics, Stochastic Processes, Operations Research||en||4||winter||Optional specialized||DrEx||yes|
|DJA6A||English for post-graduates||cs||4||winter||General knowledge||DrEx||yes|
|DMA2A||Discrete Processes in Electrical Engineering||en||4||summer||Optional specialized||DrEx||yes|
|DME2A||Microelectronic technologies||en||4||summer||Optional specialized||DrEx||yes|
|DRE2A||Modern digital wireless communication||en||4||summer||Optional specialized||DrEx||yes|
|DTK1A||Modern network technologies||en||4||summer||Optional specialized||DrEx||yes|
|DTE2A||Numerical Computations with Partial Differential Equations||en||4||summer||Optional specialized||DrEx||yes|
|DET2A||Selected diagnostic methods, reliability and quality||en||4||summer||Optional specialized||DrEx||yes|
|DAM2A||Selected chaps from measuring techniques||en||4||summer||Optional specialized||DrEx||yes|
|DBM2A||Selected problems of biomedical engineering||en||4||summer||Optional specialized||DrEx||yes|
|DEE2A||Selected problems of electricity production||en||4||summer||Optional specialized||DrEx||yes|
|DFY2A||Spectroscopic methods for non-destructive diagnostics||en||4||summer||Optional specialized||DrEx||yes|
|DVE2A||Topical Issues of Electrical Machines and Apparatus||en||4||summer||Optional specialized||DrEx||yes|
|DQJAA||English for the state doctoral exam||cs||4||both||Compulsory||DrEx||yes|