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Protections and Automatics in Distribution System

* Exchange students do not have to consider this information when selecting suitable courses for an exchange stay.

Course Unit Code410-4207/01
Number of ECTS Credits Allocated6 ECTS credits
Type of Course Unit *Compulsory
Level of Course Unit *Second Cycle
Year of Study *First Year
Semester when the Course Unit is deliveredWinter Semester
Mode of DeliveryFace-to-face
Language of InstructionCzech
Prerequisites and Co-Requisites There are no prerequisites or co-requisites for this course unit
Name of Lecturer(s)Personal IDName
MED40doc. Dr. Ing. Zdeněk Medvec
Summary
The subject includes theoretical part of protections and automatics in electric power distribution. It follows line protections, transformer protections and anti-breakdown automatics. The subject explains basic terms, principles and functions of electromechanical, transistor and digital protections.
Learning Outcomes of the Course Unit
Explaining basic terms, principles and functions of electromechanical, transistor and digital protections.
After passing the subject the student is able to apply the theory of protections and automatics in electric power distribution into the design of protection systems.
Course Contents
Lectures:
Calculation of short-circuit currents for setting of protections.
Basic terms of protections, operation of protections.
Basic elements of protections, electromechanical and statical relays.
Line protections. Over-current protections, short-circuit protections, directional over-current protections.
Line protections. Voltage protections (undervoltage and overvoltage protections).
Line protections. Distance (impedance) protections.
Line protections. Transverse and lengthwise differential protections.
Transformer protections. Differential protections.
Transformer protections. Frame-leakage protections, Buchholz protection.
Differential bus-bar protections, earth-fault protections.
Instrument transformers. Instrument voltage transformers, instrument current transformers.
Instrument voltage transformers. Static instrument error, instrument error at transient processes, dimensioning of instrument current transformers for differential protections, high-speed impedance protections and slow protections.
Digital distance protections.
Anti-breakdown automatics.

Exercises:
Information about the requirements for passing the exercises. Safety considerations. The organization of the work in the labs. Instructions for elaboration of lab task.
Calculation of short-circuit currents for setting of protections.
Setting of line over-current protections.
Setting of line impedance protections.
Setting of transformer protections.
Instrument voltage and current transformers
Dimensioning of instrument current transformers.
Credit exercise.

Laboratory:
Laboratory electrical measurement at transistor protection ALOX A100.
Laboratory electrical measurement at impedance protection D114.
Laboratory electrical measurement at differential protection S 31.
Laboratory electrical measurement at digital current protection SPAA 341 C2.
Laboratory electrical measurement at digital differential protection SPAD 346 C.
Laboratory electrical measurement at digital protection SPAC 315 C.

Projects:
Proposal and Setting of Elektric Protections Medium Voltage
Proposal and Setting of Elektric Protections High Voltage
Recommended or Required Reading
Required Reading:
1. Blackburn, J. Lewis: Protective relaying-principles and applications. Marcel Dekker, Inc., New York, 1998.
1. Janíček, F., Chladný, V. a kol.: Digitálne ochrany v elektrizačnej sústave. STU Bratislava, 2004.
2. Haluzík E.: Ochrany automatiky v elektrických sítích. Skripta VUT Brno 1985
3. Dohnálek P.: Ochrany pro průmysl a energetiku, SNTL Praha 1991
4. Horowitz, S. H., Phaddke, A. G.:Power system relaying. RSP Press Ltd. Tauton, 1992.
Recommended Reading:
1. Sleva, A. F.: Protective relay principles. CRC Press, 2009, ISBN 978-0-8247-5372-6.
1. Dohnálek P.: Provoz a údržba ochran v energetice. SNTL Praha 1989
2. Dohnálek P.: Technika ochran. SNTL Praha 1989
3. ČSN 333051 - Ochrany elektrických strojů a rozvodných zařízení.
4. Blackburn, J. Lewis: Protective relaying-principles and applications. Marcel Dekker, Inc., New York, 1998.
Planned learning activities and teaching methods
Lectures, Tutorials, Experimental work in labs, Project work, Other activities
Assesment methods and criteria
Task TitleTask TypeMaximum Number of Points
(Act. for Subtasks)
Minimum Number of Points for Task Passing
Exercises evaluation and ExaminationCredit and Examination100 (100)51
        Exercises evaluationCredit40 20
        ExaminationExamination60 15