High Voltage Engineering

Course Description

Basic definitions and applicability of the high-voltage (HV). Analytical und numerical methods for electrical field problem solving. Materials in the electrical field; dielectric losses and polarization. Electromagnetic field in the proximity of the HV transmission lines and substations. Gases as insulators; ionization and deionization; electrical breakdown. Pashen law. Effects of the AC and impulse corona. Characteristics of electrical arc in circuit breakers, arc interruption. Liquid dielectrics, electrical breakdown theory; dielectric strength. Solid dielectrics; electrical, thermal and electromechanical breakdown. Partial discharges. High voltages generation. HV measurements. HV testing. Insulation coordination of the HV systems.

General Competencies

Basic knowledge about the technology of insulating materials, testing procedures and modern methods of insulating systems on-line monitoring .

Learning Outcomes

  1. name and distinguish of power system elements which are used in HV transmission of electrical energy
  2. define and describe the way of generation and measurement of HV
  3. classify and give example of HV insulation
  4. describe differenf proceses which lead to HV insulation breakdown
  5. define insulation coordination and reproduce nominal and testing voltages for the certain insulation levels
  6. identify and classify overvoltages in power system
  7. describe isue and propagation of travelling waves

Forms of Teaching


The course is 3 hours per week. Classes are performing using presentations and written materials available to students.


Exercise will be held during the semester in total duration of 26 hours in semester.


The experiments are held during of some lectures.


Consultations are held once a week.


Homework is carried out using the Moodle system.

Internship visits

During the course a visit to transformers factories is organized.

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Homeworks 0 % 8 % 0 % 8 %
Class participation 0 % 2 % 0 % 2 %
Mid Term Exam: Written 40 % 30 % 0 %
Final Exam: Written 40 % 30 %
Final Exam: Oral 30 %
Exam: Written 60 % 45 %
Exam: Oral 45 %

To access the oral part of final examination is necessary to collect 42 points from homework, mid-term exam and the written part of the final exam.

Week by Week Schedule

  1. Basic definitions. HV generation. Testing transformers for the high alternating voltages, cascade configuration. HV measurements. Voltage dividers, measuring transformers and sphere gaps. The applicability of the high-voltage (HV) in the industry and in elecric power transmission.
  2. Electrical field - analytical methods for electrical field problem solving. Ionization and deionization processes in gases. Effects of the AC and impulse corona.
  3. Materials in the electrical field. Dielectric losses and polarization. High voltage live woking.
  4. Numerical methods for electrical field problem solving. Electricomagnetic field in the proximity of the HV transmission lines and substations.
  5. Solid dielectrics. Electrical, thermal and electromechanical breakdown of the solid dielectrics. Partial discharges. Insulating liquids, electrical breakdown theory. Dielectric strength of the liquid dielectrics.
  6. Gases as insulating material. Electrical breakdown. Electrical arc in the circuit breakers, arc characteristics and arc interruption.
  7. Preparation for exam.
  8. Mid-term exam.
  9. Pashen law. Breakdown in homogenous and nonhomogenous electric field.
  10. Generation of the high direct voltages, electrostatic generator. Generation of the impulse voltages, impulse generator. Tesla transformer.
  11. Insulation coordination of the HV systems. Temporary overvoltages.
  12. Slow-front overvoltages. Phisical base of lightning.
  13. Lightning location system. Electro-geometric model. Gas insulatet swichgare.
  14. Surge arresters.
  15. Travelling waves. Preparation for exam.

Study Programmes

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


E. Kuffel, W.S. Zaengl, J. Kuffel (2001.), High-Voltage Engineering: Fundamentals, Butterworth-Heinemann
M. S. Naidu, V. Kamaraju (2000.), High- Voltage Engineering, Mc Graww-Hill
Mazen Abdel-Salam (2000.), High-Voltage Engineering, Marcel Dekker


For students


ID 86530
  Summer semester
L1 English Level
L2 e-Learning
39 Lectures
6 Exercises
0 Laboratory exercises
0 Project laboratory

Grading System

87 Excellent
79 Very Good
68 Good
60 Acceptable