Electric Power Systems
Elkraftsystem

EIEN15F, 7.5 högskolepoäng

Gäller från och med: Autumn 2021
Beslutad av: Professor Thomas Johansson
Datum för fastställande: 2021-06-24

Allmänna uppgifter

Avdelning: Industrial Electrical Engineering and Automation
Kurstyp: Gemensam kurs, avancerad nivå och forskarnivå
Kursen ges även på avancerad nivå med kurskod: EIEN15
Undervisningsspråk: English, Swedish

Syfte

The demand for electrical energy is still increasing. To keep the high grade of reliability of electrical distribution and also make it more economic and environmentally friendly, there are many projects going on: Renewable production of electric energy is installed and the international trade is increasing. Increased capacity of the transmission system is achieved by advanced supervision and control instead of the expensive building of new transmission lines. Higher utilization of the power system requires better understanding not only of the function of the separate components, and also of the characteristics of the whole system. The course is meant to give knowledge about systems for production, transmission and distribution of electric energy under normal and abnormal conditions. The power blackout on a national level is used as a thematic example throughout the course. The course presents the structure and characteristics or the electric power system, which are lectured and studied in classroom and computer exercises and practical tests within the laboratory work. In industry, computer calculations are used for the analyses of international power systems. This type of calculations is part of the course, as well as calculations by hand, used to enhance the understanding of the computerized calculations. The course has relevance for an environmentally sustainable development: Electric energy is the most important form of energy for our prosperity. The course teaches how the power system works and can be controlled as effectively as possible and thereby minimize our energy consumption.

Mål

Kunskap och förståelse

För godkänd kurs skall doktoranden

• be able to formulate simple models of an electric power system for computation of load flow and symmetric and asymmetric fault currents;
• be able to describe the calculation process of a computer programme for the calculation of load flow;
• be able to calculate symmetric and asymmetric fault currents for a simple model of an electric power system;
• be able to formulate stability criteria for a simple power system model;
• understand the meaning of selectivity for a relay protection system.

Färdighet och förmåga

För godkänd kurs skall doktoranden

• be able to carry out computer calculations of fault currents, stability, and load flow for non-trivial power system models;
• be able to evaluate computer calculations of fault currents, stability, and load flow by hand calculations.

Värderingsförmåga och förhållningssätt

För godkänd kurs skall doktoranden show insight into the possibilities and limitations of the electric power system and its role in society.

Kursinnehåll

Construction and function of key components. Power electronic control and compensation; System representation: Single line diagram. Symmetrical components. Per unit normalization. Short-circuit MVA; System characteristics during normal operation, short-circuits, asymmetry and resonance. Angle and voltage stability. Computer dynamic simulations and load flow calculations. Control of voltage, frequency, active and reactive power. Relay protection; Study visit.

Kurslitteratur

Glover, D, J. & Sarma: Power System Analysis and Design, (International Edition (4th)).. Cengage Learning, 2007. ISBN 9780495295969.

Kursens undervisningsformer

Undervisningsformer: Föreläsningar, laborationer, övningar, studiebesök

Kursens examination

Examinationsform: Skriftlig tentamen. Written exam (5h) of problem solving mixed with theory questions.
Betygsskala: Underkänd, godkänd
Examinator:

Antagningsuppgifter

Förutsatta förkunskaper: ESS060, ESSF15 Electrical Engineering or MIE012, EIEF35 Electrical Engineering, basic course, or ETE115, EITF90 Electromagnetics and electronics.

Kurstillfällesinformation

Kontaktinformation och övrigt

Kursansvarig: Olof Samuelsson <olof.samuelsson@iea.lth.se>
Hemsida: http://www.iea.lth.se/eks