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

PhD-graduate obtains high theoretical knowledge and will learn to solve complicated scientific and technological problems by oneself PhD-graduate is ready for further professional rise with a high degree of adaptivity Graduates of PhD find occupation either as scientific or research workers including industrial development, either as universty teachers and in higher manager functions as well

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.

doc. Dr. Ing. Miroslav Patočka

1. Centralized system for measuring and control of electrical substations

   The object of this work is to create a model of electrical substations (transformer station), which will be monitored and controlled by the central processing unit communicates directly with the process level station via Ethernet. In that model will be implemented basic monitoring functions for the individual branches in switchgears of the both voltage and control of switching elements in this branches using a blocking functions defined at station level. Based on the results of testing this model a centralized approach to control and monitoring of electrical substations will be reviewed with regard to the speed and quality of communication and the capability of currently used equipment.

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

2. LED based lamps for railway applications

   Topic is focused on the LEDs spectro-radio-photometric parameters and characteristics research with regard to their colour rendering and change of the photometric parameters in luminaries for signalling and illuminating systems for railway applications. Aim of the project is proposal of a methodology for white LEDs colour rendering evaluation and determination of required LED parameters for illumination. Furthermore complex mechanical, electrical and optical design of luminaries for train’s external illuminating system with prototypes realization is expected. The problem is a part of research at Department of Electrical Power Engineering supported by the grant projects. Cooperation with Unicontrols-Tramex company is supposed. More information: drapela@feec.vutbr.cz.

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

3. Modeling and simulation of the dispersed power generation influence on the grid power quality

   Power generation using renewable power sources and preferably at point of demand is certainly way to satisfaction of ever-increasing need for the environmental protection. Nevertheless, operation of such power generation units leads to physical-technical-economical problems like hardly specifiable power supply reliability, huge time irregularity of the power supply for example under varying climatic conditions, generation of distorted voltages, etc. Thesis is focused on modeling and simulation of the following type power units: combustion engine-induction generator, wind turbine-induction generator, Photovoltaic generator-power inverter, etc. The simulation should be performed for their connection to a representative low and middle voltage power grid, with evaluation of their influence on the voltage characteristic for each power grid node. Cumulative effect of the distributed power units over the power grid is significant as well.

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

4. Modern technologies for power DC/DC converters with high output voltage

   This topic is focused on problem analysis of DC/DC converters with pulse transformers, with standard input voltage 300V or 600V (rectified net), output voltage 1kV-10kV and output power of several kW. Specific problems with construction of the secondary rectifier have to be solved. Further parasitic capacity of the output choke and transformation of secondary side parasitic capacity to the primary circuit represent another problems. Several power circuit topologies can be used to eliminate these problems. Modern switching semiconductors based on silicon-carbide (SiC) - diodes and transistors - enable to use topologies unaccepltable for earlier classical switching devices. High switching frequency can be achieved using these modern devices. This brings a dimension minimisation of transformers and chokes and further an elimination of the mentioned problems with parasitic capacities and with insulation problems. However the usage of fast SiC devices brings a necessity to solve new technical problems - transistor driving circuits, corresponding ringing problems etc. Available topologies with respect to the usage of SiC devices will be researched in the work theoretically and also practically.

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

5. Optical diagnostics of switching arc plasma

   Using high speed photography for an analysis and computational reconstruction of switching arc behavior in a switchgear under real conditions. Analysis of spectral filterring inflence on the switching arc digital image quality. Development of a software for high speed framing acquisition and subsequent digital image processing.

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

6. 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.

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

7. The models of electrical machines at adaptive CAD systems

   Aims of the thesis: - Search documentation on exchange data formats - Specification of possibility CAD systems cooperation with external databases. - Usage analasys of parametrs at Inventor for items and component database creation. - The creating of Library centrum at Autodesk Inventor. - Specification of possibility CAD systems cooperation with Kinematics analysis

   Tutor: Kuchyňková Hana, doc. Dr. Ing.