Groundings and Grounding Systems in Power Networks

Последна измена: March 30, 2023
1. Course Title Groundings and Grounding Systems in Power Networks
2. Code 4ФЕИТ09З008
3. Study program ЕЕС
4. Organizer of the study program (unit, institute, department) Faculty of Electrical Engineering and Information Technologies
5. Degree (first, second, third cycle) First cycle
6. Academic year/semester IV/7 7. Number of ECTS credits 6
8. Lecturer D-r Mirko Todorovski
9. Course Prerequisites Passed: High Voltage Transmission Networks and Systems
10. Course Goals (acquired competencies): Understanding the dangers of touch and step voltages in accordance with national and international regulations. Mastering the methods for grounding resistance calculation, as well as surface potential distribution around the grounding. Ability to apply methods for solving complex earthing systems composed of multiple grounding grids, overhead lines, and cables.
11. Course Syllabus: Introduction. Field of study. Basic features of groundings and grounding systems in power networks. Grounding modeling. Interactions with nearby groundings. Numerical solution of grounding configurations. Application of software tools. Overhead lines as elements of the grounding system. Grounding of the towers and transformer stations for high and medium voltage. Typical solutions and their characteristics. Impulse impedances. Grounding model of a transmission line, approximate and detail modeling. Reduction factor. Power cables as elements of the grounding system. Model with distributed parameters and equivalent pi-circuit. Reduction factor. Transferred potentials. Complex grounding systems in high voltage transmission networks. Calculation of voltages and current distribution under ground fault. Grounding systems of medium voltage distribution networks, possibilities for neutral grounding, common practice, recommendations and technical regulations. Modern numerical techniques for grounding system analysis.
12. Learning methods: Lectures and recitations with presentations and simulations, teacher-student interaction, homework, projects.
13. Total number of course hours 3 + 2 + 0 + 0
14. Distribution of course hours 180
15. Forms of teaching 15.1. Lectures-theoretical teaching 45
15.2. Exercises (laboratory, practice classes), seminars, teamwork 30
16. Other course activities 16.1. Projects, seminar papers 30
16.2. Individual tasks 30
16.3. Homework and self-learning 45
17. Grading 17.1. Exams 20
17.2. Seminar work/project (presentation: written and oral) 20
17.3. Activity and participation 10
17.4. Final exam 50
18. Grading criteria (points) up to 50 points 5 (five) (F)
from 51to 60 points 6 (six) (E)
from 61to 70 points 7 (seven) (D)
from 71to 80 points 8 (eight) (C)
from 81to 90 points 9 (nine) (B)
from 91to 100 points 10 (ten) (A)
19. Conditions for acquiring teacher’s signature and for taking final exam Participation in lectures and recitations.
20. Forms of assessment Twо mid/end-term exams (120 min each), or final exam (120 min).
Student must complete and submit the required homework and project assignments, according to the schedule published at the course web site.
Final mark is determined from the weighted average of scores from exams, homework, and project assignments.
The use of books or notes of any kind, as well as a calculator, mobile phone, tablet or any other electronic device is allowed during the written exams.
21. Language Macedonian and English
22. Method of monitoring of teaching quality Internal evaluation and questionnaires.
23. Literature
23.1. Required Literature
No. Author Title Publisher Year
1 Р. Ачковски, М. Тодоровски Заземјувачи и заземјувачки системи во електроенергетските мрежи (рецензиран учебник) ФЕИТ, Скопје 2017
2 J. Nahman Uzemljenје neutralne tačke distributivnih mreža Naučna knjiga, Beograd 1980
3 L. L. Grigsby The Electric Power Engineering Handbook, part: Substation Grounding CRC PRESS, IEEE PRESS 2001
23.2. Additional Literature
No. Author Title Publisher Year
1 – Технички препораки, правилници и стандарди – NULL
2 Д. Рајичиќ Вовед вo дистрибутивни електроенергетски системи ЕТФ, Скопје 1995