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Grounding and earthing systems DE4I-09

ECTS 5 | P 30 | A 0 | L 15 | K 15 | ISVU 149825 | Academic year: 2019./2020.

Course groups

Prikaži sve grupe na predmetu

Course lecturers

KNEŽEVIĆ GORAN, Lecturer
TOLIĆ IVAN, Associate

Goals

Explain to students the design of the grounding system of power plants. Train students to be able to independently calculate and measure ground resistance of power plants.

Conditions for enrollment

The necessary requirements to enrol in the second year of the studies.

Course description

Grounding types, definition of grounding and grounding systems. Soil characteristics, seasonal changes in ground resistance, soil resistance measurements. Touch voltage, step voltage, and electrical shock protection criteria. Theoretical settings for the calculation of ground resistance, basics of numerical methods for the analysis of the grounding system. Vertically placed grounding electrodes, potential distribution, and calculation of the ground resistance of rods. Horizontally placed grounding electrodes, potential distribution, and calculation of the ground resistance of the horizontal conductor. Grounding in concrete foundations, metal reinforced foundations as grounding systems. Combined grounding with group of rods and horizontal conductors, ray grounding, ring grounding, net grounding. Grounding for the protection against atmospheric discharge (impulse grounding). Reduction factor of grounding, application of metal sheathing cable as grounding, potential recovery problems. Special grounding electrodes. Grounding design of TS 10 (20) / 0.4 kV and poles of power lines 10 (20) kV. Calculation of ground resistance and potential distribution using the CYMGRD Programming Pack for different grounding configurations.

Student requirements

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Monitoring of students

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Obligatory literature

1. 1 Majdandžić, F. Uzemljivači i sustavi uzemljenja Zagreb: Graphis, 2004.

2. 2 He Jinliang; Zeng Rong; Zhang Bo Methodology and technology for power system grounding IEEE, John Wiley & Sons Singapore, 2013.

3. 3 H. Požar Visokonaponska rasklopna postrojenja Tehnička knjiga - Zagreb, 1967.


Pretraži literaturu na:

Recommended additional literature

1. 1 A.P. Sakis Meliopulos Power System Grounding and Transients: An Introduction Marcel Dekker, Inc., New York, 1988.

2. 2 M. Padelin Zaštita od groma Školska knjiga, Zagreb 1987.

Course assessment

Conducting university questionnaires on teachers (student-teacher relationship, transparency of assessment criteria, motivation for teaching, teaching clarity, etc.). Conducting Faculty surveys on courses (upon passing the exam, student self-assessment of the adopted learning outcomes and student workload in relation to the number of ECTS credits allocated to activities and courses as a whole).

Overview of course assesment

Learning outcomes
Upon successful completion of the course, students will be able to:

1. define the basic concepts of grounding and earthing systems

2. evaluate the results of ground resistance calculation for rods, strip, foundation grounding and grounding grids

3. construct composed grounding by a combination of strips and rods

4. measure the resistance of grounding of electric power station

5. design a complex earthing system of power substations using computer software



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