Overhead Lines and Cables

Course Description

Technical standards of overhead lines. New concepts in mechanical lines design. Compact overhead lines. Radio and TV interference. The impact of power lines to communication networks. Effects of untransposed lines on current and voltage unbalance in power grids. Materials for conductors and insulators. Cable parameters. Electrical fields in power cables, capacitance and inductance. Current capacity of cables. Correction factors. Overhead line - cable transition. Laying of cable. Cable trench.

General Competencies

Students will gain knowledge of electric power networks elements and gain experience with calculations of mechanical and electrical paremeters of lines and cables.

Learning Outcomes

  1. define the main principles of electric power transmission
  2. explain the characteristics of power transmission by overhead lines and electric cables
  3. analyze and calculate electric parameters of overhead lines and electric cables
  4. analyze electromagnetic fields in overhead line and electric cables and their environment
  5. plan the construction of new overhead transmission lines and electric cable lines
  6. compare the advantages and disadvantages of electric power transmission by overhead lines and electric cables

Forms of Teaching

Lectures

Lectrures are given with the use of powerpoint presentations published on the web pages. The lectures are organized through 2 cycles. The first cycle consists of 7 weeks of lectures and 1st midter. econd cycle has 6 weeks of lectures and final exam. The lectures are given in total of 13 weeks, two hours per week.

Exams

two midterm exams and final exam

Consultations

Consultation term is determined on the first lecture in agreement with the students.

Other

homeworks

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Homeworks 0 % 10 % 0 % 10 %
Mid Term Exam: Written 0 % 40 % 0 %
Final Exam: Written 0 % 25 %
Final Exam: Oral 25 %
Exam: Written 0 % 45 %
Exam: Oral 45 %

Week by Week Schedule

  1. Technical standards of overhead lines.
  2. New concepts in mechanical lines design.
  3. Compact overhead lines.
  4. Radio and TV interference.
  5. The impact of power lines to communication networks.
  6. Effects of untransposed lines on current and voltage unbalance in power grids.
  7. Cables in general (LV, MV and HV; DC cables); gas-insulated lines.
  8. Exam
  9. Exam
  10. Materials for conductors and insulators.
  11. Cable parameters. Electrical fields in power cables. Capacitance, dielectric losses in cable, active resistance and inductance.
  12. Current capacity of cables. Correction factors.
  13. Surge arrester for protection of HV cables metallic sheath
  14. Overhead line – cable transition
  15. Laying of cable. Cable trench.

Study Programmes

University graduate
Electrical Power Engineering (profile)
Specialization Course (2. semester)

Literature

Marija Ožegović, Karlo Ožegović (1996.), Električne energetske mreže I, FESB : Opal computing
Marija Ožegović, Karlo Ožegović (1997.), Električne energetske mreže II, FESB : Opal computing
Thomas Shoemaker, James Mack (2009.), Lineman and Cablemans Field Manual, McGraw-Hill Professional
Jos Arrillaga, C. P. Arnold (1990.), Computer Analysis of Power Systems, Wiley

For students

General

ID 34489
  Summer semester
4 ECTS
L1 English Level
L1 e-Learning
30 Lectures
0 Exercises
0 Laboratory exercises
0 Project laboratory

Grading System

90 Excellent
80 Very Good
67 Good
55 Acceptable