Course code ETehB001
Credit points 4
Transients and Protective Relays
Total Hours in Course120
Number of hours for lectures26
Number of hours for seminars and practical classes18
Number of hours for laboratory classes0
Independent study hours64
Date of course confirmation13.12.2023
Responsible UnitInstitute of Engineering and Energetics
Course developer
Inženiertehnikas un enerģētikas institūts
Aleksejs Gedzurs
Ph.D.
Prior knowledge
ETeh2019, Applied Electrical Engineering
ETeh4037, Fundamentals of Electrical Engineering I
ETeh4048, Fundamentals of Electrical Engineering II
Replaced course
ETeh4051 [GETH4052] Transient Processes and Relay Protection
Course abstract
The purpose of the study course: to learn the principles, types, causes and consequences of transition processes occurring in electromagnetic circuits, to learn analytical calculation methods of short-circuit currents for different types of short-circuits in networks of different voltages. The main causes of failures and breakdowns in electromagnetic systems are discussed. Modeling of transient processes using the MATLAB/SIMULINK environment is learned. Current protection, voltage protection, frequency protection, their types, operational control schemes and their power supplies are studied.
Learning outcomes and their assessment
Knowledge of the principles of operation of electrical equipment and network relay protection and their operation - test.
Skills to choose the appropriate set of relay protections for the object, to be able to operate and control the operation of the relay protections of the object, to use modeling systems in visualization of transition processes and data analysis - practical work.
Competences to perform efficient and economically justified selection, installation of components of relay protection system of production objects, evaluation of damages and disturbances caused by transients in electromagnetic systems - presentation.
Course Content(Calendar)
1. Electromagnetic transients. (Lecture - 5h, practical work - 2h)
2. Modeling of transition processes. (Lecture - 2h, practical work - 1h)
3. Transition processes of synchronous and asynchronous machines. (Lecture - 1h, practical work - 1h)
4. Transition processes in energy systems. Network parameters and transition processes. Peculiarities of power systems in agricultural objects. (Lecture - 1h, practical work - 1h)
5. Types and construction of relays. (Lecture - 1h, practical work - 1h)
6. Current protection. Fuse. Bimetallic thermocouple. Maximum and instantaneous current protection. (Lecture - 3h, practical work - 2h)
7. Voltage protection. Atmospheric surge protection. Lightning receiver system calculation methods. External and internal lightning protection systems. (Lecture - 4h, practical work - 2h)
8. Automatic control in relay protection systems. Automatic restart. Automatic backup activation. (Lecture - 1h, practical work - 1h)
9. Electric motor emergency modes and their protection. (Lecture - 3h, practical work - 3h)
10. Protection of transformers, electricity transmission networks. (Lecture - 2h, practical work - 1h)
11. Conditions for selection of relay protection and installation requirements in farms, horticulture and other agricultural objects. (Lecture - 1h, practical work - 1h)
Requirements for awarding credit points
Cumulative exam. It is necessary to successfully write a test, give a presentation on the chosen topic, and develop a practical work.
Description of the organization and tasks of students’ independent work
Practical work. Calculations and selection of lightning rod protection system for a given object.
Presentation. Presentation topic is relay protection systems types. Student selects one of the protection system type and makes a presentation about it. Presentation should include:
- failure mode analyses, breakdowns and potential economical losses;
- Operation principles, construction and types of protection system;
- Selection criteria for protection system components;
Installation and operation conditions for protection systems.
Criteria for Evaluating Learning Outcomes
The exam grade is based on the assessment of the test (50%), practical work (20%), and presentation (30%).
Compulsory reading
1. Meļņikovs V. Elektroapgāde. 2.daļa. 2006. 142 lpp. [Tiešsaiste] [skatīts 15.12.2015.]. Pieejams: http://www.rvt.lv/macibas/esf-gramatas/743-poligrafija-un-kimija
2. Meļņikovs V. Elektroapgāde: lekciju konspekts. Rīga: Profesionālās izglītības kompetences centrs "Rīgas Valsts tehnikums", 2012. Pieejams: Pieejams: http:// www.rvt.lv/GRAMATAS/Energjetikju_gramatas/10V.Melnikovs.Elektroapg%C4%81de.Lekcijas%20konspekts.2012.docx
3. Barkāns J. Enerģijas ražošana Rīga: RTU, 2001. [Tiešsaiste] [skatīts 15.12.2015.]. Pieejams: http://www.eef.rtu.lv/doc/studiju_materiali/012.pdf.
Further reading
Shenkman A.L. Transient analysis of electric power circuits handbook. Springer, 2005. 569 p.
2. Network Protection and Automation Guide. 476 p. [Tiešaiste] [skatīts 15.12.2015.]. Pieejams: http://www.alstom.com/grid/solutions/Substation-automation-system/protective-relays/Network-Protection-Automation-Guide-NEW-2011-Edition/
3. Gers J. M. Holmes E. J. Protection of Electricity Distribution Networks . 2nd ed. IEE. 2004. 341 p.
Notes
Compulsory course in full-time and part-time studies of FEIT professional higher education bachelor study program Applied Energy Engineering.