LV EN RU DE FR

Electric Power Stations and Networks

Course developer

Prior knowledge

EeTkB003, Applied Electrical Engineering

EeTkB005, Fundamentals of Electrical Engineering I

ETeh4048, Fundamentals of Electrical Engineering II

Replaced course

Ener4033 [GENR4034] Electric Power Stations and Networks

Course abstract

The aim of the study course is to learn the calculation methodology of complex electrical networks, the operating principles of electrical stations and substations, the structure and operation of electrical transmission networks. Students get to know the problems of electricity transmission in Latvia and the world in general, energy development programs. Students learn wire cross-section calculations for complex electrical networks, short-circuit currents and their calculation methodology. The types of electric arcs, their structure, methods of extinguishing them, current-carrying parts of electrical equipment and their selection, schemes of electrical stations and substations, their operating principles, modes, frequency and voltage regulation are discussed.
Students learn modeling of power supply networks using the MATLAB subprogram Simulink.

Learning outcomes and their assessment

Knowledge: about the structure, construction and elements of the power transmission network, types of power stations and substations and their importance in the power supply system, power transmission system operating modes, the principles for regulating them. - Test 1 and 2.
Skills: to perform calculations of electrical equipment parameters and short-circuit currents and to choose electrical equipment according to them (power transformers, circuit breakers, power line cables and wires, switching and protection equipment) - homeworks 1-4.
Competences: from a technical and economic point of view, assess the compliance of the electrical supply equipment in the project stage and in operation with the engineering calculations, selection of the equipment and optimization of parameters.- home works 1-4, credit work.

Course Content(Calendar)

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 – pract. 1h
8. Selection of wire cross-section for complicated power supply networks – lect. 3h
9. Short circuit current calculation methods – lect. 3h, pract. 2h
10. Leading elements of electric power plants – flexible and solid buses, current conductors – lect. 3h, pract. 2h
11. Frequency regulation in electrical networks – lect.3h, pract. 1h
12. Voltage regulation in electrical networks – lect.2h
13. Operating stability and throughput of the power transmission systems – lect.3h, pract. 1h
14. Electrical network calculations using special computer programs – lect. 3h, pract. 2h
Test 2. Power Transmission System Modes, Principles of their Adjustment.- pract. 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

Cumulative exam. Students must have successfully completed written tests, completed a theory test. All practical work and homework must have been completed.

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 exam grade depends on the test grade and the cumulative grade of the course tests and homework.
A student can obtain a successful grade for a test or a test if at least 50% of the test questions are answered correctly.
The exam grade is calculated as the arithmetic average of the grades of tests and homework completed during the study course.

Compulsory reading

1. Enģelis A., Arājs R. Augstspriegumu elektriskās līnijas. Rīga, 2004. 239 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: http://www.rvt.lv/macibas/esf-gramatas/743-poligrafija-un-kimija
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.

Periodicals and other sources

1. Enerģija un Pasaule. ISSN 1407-5911

Notes

Compulsory course in full-time and part-time studies of FEIT professional
higher education bachelor study program Applied Energy Engineering.