INTERNATIONAL BURCH UNIVERSITY
Faculty of Engineering and Natural Sciences
Department of Electrical and Electronic Engineering
||High Voltage Techniques
||Number of ECTS Credits
||Class Hours Per Week
||Total Hours Per Semester
||2 + 2
|Insulating materials and systems used for electrical insulation of various components of high voltage equipment. Phenomena related to breakthrough in high voltage insulation.
|The primary objective of this course is to introduce students into deeper understanding of physical phenomena that represent foundation of engineer practice required to achieve practical results in the field of high voltage insulation of cables, insulators, power transformers, etc. Accordingly, the course deals with the following phenomena: conductivity, polarization and electric field distribution inside dielectrics, breakdown mechanisms and aging mechanisms.
- Electrical conductivity: Definitions (electron, ion and molion conductivity). Conductivity inside metals, gases and liquid fluids and solid dielectrics. Conductivity temperature dependence. Superconductivity.
- Polarization: Electron, ion, migration polarization. Complex dielectric permittivity. Dielectric permittivity dependence on different influencing factors (temperature, humidity, frequency).
- Electric field distribution in high voltage systems: Non - homogeneity environment influence, electric field grading, application of field distribution calculation in designing of insulation systems.
- Dielectric losses: Definition of tgδ and its dependence on different influencing factors, measurement of dielectric losses angle (diagnostics).
- Dielectric breakdown: Definitions of breakdown and flashover; electric, thermal, streamer breakdown type; breakdown in gases, breakdown in solid dielectrics, breakdown in liquid dielectrics.
- Dielectric strength: Dielectric strength dependency on different influencing factors (duration time of applied voltage, wave shape, electrode shape, material type, distance between electrodes…), methods for dielectric strength estimation of insulating materials and systems.
- Partial discharges: Ignition process, procedures for describing of intensity, identification and measurement of intensity (diagnosis).
- Discharges and flashover in polluted atmosphere conditions: Ignition mechanism, mathematical model; measures for improvement of insulation system performance (design, materials).
- Insulating materials and systems: Solid, liquid and gaseous dielectrics commonly used in practical insulation systems (cables, insulators, transformers, generators, circuit breakers).
- Aging and expected life of materials and systems: Thermal, electric and multidimensional aging; estimation methods for expected life of insulating materials and systems.
- Discussions and group work
| Midterm Exam(s)||30|
| Final Exam||1||40|
- Deeper understanding of physical phenomena in the field of high voltage insulation
- Deeper understanding of physical phenomena in the field of conductivity
- Deeper understanding of physical phenomena in the field of polarization
- Deeper understanding of physical phenomena in the field of electric field distribution inside dielectrics
- Deeper understanding of physical phenomena in the field of breakdown mechanisms and aging mechanisms
- K. Sokolija: \"Tehnologija visokonaponske izolacije\", Univerzitet u Sarajevu
- E. Kuffel, W.S. Zaengel, J. Kuffel:\"High Voltage Engineering: Fundamentals\", Newnes, 2000.
- F.H. Krueger:\"Industrial High Voltage\", Vol I i II, Delft University Press,
- 1991, 1992.
|ECTS (Allocated based on student) WORKLOAD
|Lecture (14 weeks x Lecture hours per week)||15||2||30|
|Laboratory / Practice (14 weeks x Laboratory/Practice hours per week)||15||2||30|
|Midterm Examination (1 week)||1||2||2|
|Final Examination(1 week)||1||2||2|
|Preparation for Midterm Examination||1||20||20|
|Preparation for Final Examination||1||25||25|
|Assignment / Homework/ Project||4||3||12|
|Seminar / Presentation|| || ||0|