Department of Electric Power Engineering, PhD in electrotechnics
PhD courses
PhD courses are usually given every second year.
PhD Courses
Supervisor
ET8100 Electric Conductivity, Dielectric Losses and Breakdown of Solid and Liquid High Voltage Insulation
The purpose of the course is to give an indepth review of limiting factors regarding application of different dielectric materials in High voltage apparatus.
The following main topics are covered: -Electrical conduction in glass, oil and other amorphous dielectrics due to movement of ions and particles. -Electronic conduction in partly crystalline solid materials, focusing on influense of applied electric field and temperature. Schottky, Poole-Frenkel and Spacecharge limited currents are particularly discussed. -Physical description of Permittivity and dielectric loss with respect to Clausius Mosottis equations, the Debye relaxation, Garton effects,ion and interface polarisation as basis for frequency and time domain description of dielectric responce. -Electric breakdown of solid and liquid dielectrics, including statistical methods for evaluation of breakdown data. -The course will focus on description of mechanisms regarding the commonly used insulating materials: Polymers, oil/paper and glass.
Erling Ildstad
ET8101 Transient Overvoltages in Electrical PowerSystemsUnderstand the principles for accurate calculation of power system transients. Achieve knowledge of methods for advanced modelling of transmission lines and transformers valied under steady state and transient conditions.
The course presents methods for accurate calculation of transients in electrical power systems. Main content: - Summary of types of transients. - Modelling of components (overhead lines, cables and transformers) - Analysis of travelling wave problems. Formulation and solutions in time and frequency domain when losses and distortion is taken into account. Fourier transforms, modal analysis, and vector fitting. - Description and analysis of ferroresonance and inrush currents in transformers. - Lightning induced overvoltages.
Colloquiums and lectures. Calculation and computer excercises. Laboratory exercises. The course is given every second year, next time spring 2009.
Hans Kristian Høidalen
ET8102 Testing of High Voltage Insulation
Understand the principles of generation and measurement of high voltage in the laboratory for testing of equipment. Develop a critical sense related to measurement set-ups and accuracy.
Methods for generation of test voltages in high voltage laboratories and principles of measurement techniques related to testing of materials and components. Some main topics: - Generation of high AC- DC- and impulse voltages. - Measurement of various types of voltages. - Rated voltages and standardize test methods. - Accellerated tests. - Probability considerations and comparison between laboratory tests and real systems. - Case study of testing a component.
Colloquiums. Laboratory and calculation exercises. Project. The course is given every second year, next time autumn 2008.
Hans Kristian Høidalen
ET8200 Power System Reliability and Security (UTGÅR 2008)
To give a deeper understanding of the problems in power system reliability and security, and to provide methods and techniques to solve these problems.
The course is given every second year, next time Spring 2008. The course includes methods and techniques for reliability and security analysis of power systems. The topics in the course can be grouped in three parts: 1. Techniques for reliability evaluation, such as minimum cut set and Markov models to model weather effects and maintenance. Models for evaluation of generation systems (LOLP, LOLE and Energy not supplied). 2. Load flow models applied to contingency analysis. 3. Combination of load flow modelling and reliability evaluation for analysis of meshed networks (regional and main grid).
The participant will be actively involved through presentation and discussion of assignments (exercises) which are an important part of the course. If international students are taking part the course will be given in English.
Last exam spring 2008
Arne T. Holen
ET8201 Voltage Instability in Power Systems
To give a deep understanding of the mechanisms contributing to voltage instability and collapse. Also analytical techniques used to study the voltage collapse phenomena will be described.
The following topics are included: - Description of phenomena and problem based on recent incidents in the power systems - Fundamental theory and mechanisms describing voltage stability: static analysis based on load flow equations and nose curves, and dynamic mechanisms as automatic tap-changers and rotating machines. - Methods for calculation of static stability, reactive power reserves and margins to voltage collapse: load flows, sensitivity analysis, continuation power flows Methods and techniques from a dynamic perspective: for example load characteristics
Colloquiums, written assignments using Matlab as well as self study. The course is given every second year, next time spring 2009
Olav B. Fosso
ET8202 Power System Stability and Control
To give a deep understanding of issues related to power system stability and control. The topics covered will include component modelling (generation, load, transmission), control systems and analytical techniques.
The course will cover: ? General background and overview of power system stability issues (angle and voltage stability, transient, midterm and long-term stability). Synchronous machine theory and modelling. Machine representation in stability studies. AC transmission components. Power system loads ? Excitation systems. Prime movers and energy supply systems HVDC, Control of active power and reactive power, Small-signal stability, Transient stability. Methods for improving stability.
The course material gives an in-depth description of the topics where parts of it are covered in the prerequisite courses. A subset of approximately 400 pages will be defined for examination
The teaching is based on a colloqium approach, where each topic is briefly presented before a more detailed discussion takes place. All participants must prepare before each colloqium. There will also be theoretical practises (voluntary) as well as use of Matlab. The course is given every second year, next time autumn 2008.
Olav B. Fosso
ET8203 Optimal use of Power Production and Transmission Facilities in Hydro Power Systems (UTGÅR)
The goal is to give an insight in the principles and techniques used for power system operation planning with emphasis on use of optimization techniques. Challenges related to liberalization and restructuring of the power industry are given special attention.
Overview of the scheduling process in hydro-thermal power systems (long-, mid-, and short-term). Methods applicable for optimization of system resources ? Issues related to transmission system use (transmission access, transfer capacity, technical limitations caused by thermal ratings, possible contingencies and stability problems)
Methods used to study phenomena related to transmissions use. Theoretical challenges in System Operation. Markets of the future. System planning in a competitive environment The course material gives an in-depth description of the topics where parts of it are covered in the prerequisite courses. A subset of approximately 400 pages will be defined for examination.
The teaching is based on a colloqium approach, where each topic is briefly presented before a more detailed discussion takes place. All participants must prepare before each colloqium. There will also be theoretical practises (voluntary) as well as use of the optimization tool ILOG Cplex. Last exam spring 2008
Olav B. Fosso
ET8204 Power Market Theory
Corresponding to subjects TET4115 Power systems, TIØ4120 Operations research, TET4135 Energy planning and TET4185 Power markets.
Security of supply and vulnerability Security of supply, specifically related to incentives for investment in generation, but also transmisson, is an unsolved challenge in today's power markets. The course will discuss the background of the problem and introduce presently implemented and proposed solutions. Transmission pricing including constraint handling Various methods for transmission pricing and transmission constraint handling are presented and analyzed. Focus on flow-based market splitting, which is an evolution and generalization of the price area model used in Norway. Transit through other control areas. Market power Alternative models for analysis of market power in power markets. Market power in relation to transmission constraints. How is market power measured, what can be done to reduce or avoid market power. International practice and experience. Ancillary services Handling of ancillary services in various power markets. Demand flexibility Present power markets are mostly one-sided: producers are active market participants, while consumers are more or less passive. This has a number of negative effects, and development of a more flexible demand side will result in substantial improvements. Backround, opportunities and developments.
Lectures and mandatory excercises. The course is given every second year, next time autumn 2008.
The course will give a thorough understanding of a number of central issues in power markets, as well as methods an theories that are in use or proposed to solve these issues.
Gerard Doorman
ET8300 Digital Signal Processing in Power Electronic Systems
The course aims to give knowledge about design of control systems for electrical energy conversion.
The course will give an introduction to analysis and design of electronic systems for digital signal pocessing and energy efficient control of electrical energy conversion systems. Methods for mathematical modelling of system elements and methods for utilizing Digital Signal Processors(DSP)and other components for control of power electronic converters will be covered. A laboratory project with individually designed laboratory exercises will help the student to practice the information presented.
The course is given every second year, next time spring 2008.
Lars Norum
ET8301 Magnetic Design of Permanent Magnet Machines
Give a deep understanding of the aplication of permanent magnet materials in traditional and new electrical machine desgins. Advanced winding designs and analytical methods are included.
Aim of the course is to give the student an understanding of fundamental construction principle applied on modern constructions as permanent magnet machines. The course emphasizes decision of magnetic fields and belonging forces, losses and construction characterizing parameters. A study of construction example will be undertaken. In this study several sub topics to provide a good overall solution is discussed. Entry for the sub topics in the course is: Magnetic and electric fields, Generally limiting factors, Calculation of losses, Cooling, Insulation, Winding layout, Magnetic core material, Permanent magnet material, Optimization, Cost modelling.
Give a deep understanding of the aplication of permanent magnet materials in traditional and new electrical machine desgins. Advanced winding designs and analytical methods are included.
Robert Nilssen
ET8302 Linear Electromagnetic Devices
Give a deep understanding of the aplication of linear electrical machines in offshore and maritime applications, such as actuators and reciprocating motors/generators.
Linear induction motors: Principles, classification and applications. Linear induction motors (LIMs): construction aspects: flat, tubular, windings. Airgap field equation. Design criterion: the goodness factor. Skin and edge effects. LIM equivalent circuit. Performance characteristics. Linear PM synchronous motors (LPMSMs): Basic configurations. Fields.forces.d-q model. Vector diagrams. Steady state characteristics-with flux weakening. Vector control of LPM design methodology and examples. Plunger solenoids. The non linear circuit model. Design methodology by example. Motion control ofsolenoids-magnetic levitation. Linear oscilomotors: A few topoloies and their characterisation, coil mover, PM mover, Iron-mover with stator-PMs. The circular coil unipolar LOM design and example: rectangular coil LOM. The stator PM iron-mover LOM-princiole, theory, startingtransiens, perfomance and design methodology by example.
The teaching is based on a colloqium approach, where each topic is briefly presented before a more detailed discussion takes place. All participants must prepare before each colloqium. The course is given every second year, next time spring 2008.
Robert Nilssen
ET8303 Power Electronics, Power Semiconductor Physics and Reliability
The course aims to give a deep understanding of semiconductor physics and the role of semiconductor physics in optimal and reliable power electronics converter design.
These topics are included: - Physics for optimal utilization of power semiconductors: Power diodes, power transistors, thyristors, Gate Turn-Off Thyristors, Insulated Gate Bipolar Transistors, SiC components. - Snubbers - Gate drivers - Cooling - Design of high frequency magnetic components
Lectures, self study and project based on litterature studies. The course is given every second year, next time autumn 2007.
Undeland, Tore
ET8400 Lighting Design
The course will give a deeper understanding of design of lighting systems.
