Course code Ener4033

Credit points 4.50

Electric Power Stations and Networks

Total Hours in Course120

Number of hours for lectures32

Number of hours for seminars and practical classes16

Independent study hours72

Date of course confirmation16.12.2015

Responsible UnitInstitute of Engineering and Energetics

Course developer

author lect.

Indulis Straume

Mg. sc. ing.

Prior knowledge

Ener4003, Electric Power Supply and Tariffs

ETeh4048, Fundamentals of Electrical Engineering II

Replaced course

EeTkB001 [GEIKB001] Electric Power Stations and Networks

Course abstract

The aim of the study course is to acquire problems of electricity transmission, programs of energy development, schemes and operation of electricity stations and substations, graphics of loads, choice and verification of electrical current conductive parts of the equipment, short-circuit calculation methods, reactive power compensation shapes, measuring transformers. Students get acquaint with electrical arc types and structures, removal methods. Students acquire calculation of sophisticated networks and wire cross section, the electrical network simulation using MATLAB sub-software Simulink.

Learning outcomes and their assessment

Knowledge - the construction of substations and its characteristics, the construction and use of hardware, the operating modes of electricity supply networks and the principles for regulating them - Test 1 and 2.
Skills - carrying out engineer calculations for the of substations and electricity networks, their elements and selecting substation equipment according to conditions - homework 1-4.

Competence - calculation of the parameters of the elements of substations and selection of appropriate equipment, assessment of their operation and optimization of parameters — home work, credit work.

Course Content(Calendar)

Full time intramural studies:
1. The state of electric power transmission systems in Latvia and in the world– lect.2 h, pract. 2h
2. Load curves– lect. 2 h, pract. 2h
3. Types of power plants and their role in the power supply systems – lect. 3h
4. Power plant design and circuits – lect. 2h
5. Types, structure and schemes of substation – lect. 2h, pract. 2h
6. Selection a network transformer power and transformer point – lect.2h, pract. 2h
7. Selection of power supply equipment and elements taking into account electrodynamic and thermal resistance conditions – lect.3h, pract. 2h
Test 1. Types of power plants, load curves, substation schemes – 1h
8. Selection of wire cross-section for complicated power supply networks – lect. 2h
9. Short circuit current calculation methods – lect. 3h, pract. 2h
10. Leading elements of electric power plants – flexible and solid buses, current conductors – lect. 2h, pract. 2h
11. Frequency regulation in electrical networks – lect.2h, pract. 1h
12. Voltage regulation in electrical networks – 2h, pract. 1h
13. Operating stability and throughput of the power transmission systems – lect.2h, pract. 1h
14. Electrical network calculations using special computer programs – lect. 2h, pract. 2h
Test 2. Power Transmission System Modes, Principles of their Adjustment.- 1h
Part time extramural studies:

All topics specified for full time studies are accomplished, but the number of contact hours is one half of the number specified in the calendar

Requirements for awarding credit points

Credit with mark.
Written test of four questions.

All practical work must be done

Description of the organization and tasks of students’ independent work

1st homework. Design of load graphs, choice of transformer power.
2st homework. Short circuit current calculation.
3st homework. Electro-dynamic and thermal calculations in the case of short-circuiting.

4st homework. Choice of substation equipment, taking into account electrodynamic and thermal conditions.

Criteria for Evaluating Learning Outcomes

The assessment of the study course test depends on the assessment of the test task and the cumulative assessment of the study course and home assignments.
A student can get a successful mark on a test if at least 50% of the test questions are answered correctly.
The homework assignment is assessed according to the assessment procedure set out in the homework assignments.

The test mark is calculated as the arithmetic mean of the test assignments and the average grade of the semester, which is calculated as the arithmetic mean of the test papers and homework assignments arranged in the study course.

Compulsory reading

1. Baltiņš A., Kanbergs A., Miestniece S. Zemsprieguma elektriskie aparāti. Rīga: Jumava, 2003. 331 lpp.
2. Vanags A. Elektriskie tīkli un sistēmas. I daļa. Rīga: RTU, 2002. 472 lpp.

3. Vanags A., Krišāns Z. Elektriskie tīkli un sistēmas. II daļa. Rīga: RTU, 2005. 337 lpp.

Further reading

1. Meļņikovs V. Elektroapgāde. 3 daļas. Rīga: RVT, 2006. Pieejams:
2. Anderson P.M., Fouad A.A. Power System Control and Stability. Wiley-Interscience, 2003. 658 p.

3. Tleis N.D. Power Systems Modelling and Fault Analysis: theory and practice. Oxford: Newnes is an imprint of Elsevier, 2007. 625 p. Pieejams arī LLU tīklā - datubāzes EBSCO e-books datubāzes elektroniskā grāmata.

Periodicals and other sources

1. Enerģija un Pasaule. ISSN 1407-5911


Compulsory course in full-time and part-time studies of TF professional higher education bachelor study program Applied Energy Engineering specialization “Energy supply”.