- Docente: Andrea Cavallini
- Credits: 6
- SSD: ING-IND/33
- Language: English
- Teaching Mode: Traditional lectures
- Campus: Bologna
- Corso: Second cycle degree programme (LM) in Electrical Energy Engineering (cod. 9066)
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from Feb 21, 2023 to Jun 09, 2023
Learning outcomes
At the end of the course the student knows the basic properties of the dielectrics and the physical mechanisms leading to the breakdown of insulating system composed of either gaseous, liquid, or solid dielectrics or a combination of them. He also knows the weak points of insulation system and how to avoid them in the design phase and through a qualification procedures.
Course contents
- Electrodes (coaxial cylinders and concentric spheres, point/plane electrodes, emission of electrons from metal electrodes)
- Conduction mechanisms in dielectrics.
- Dielectric response.
- Discharges in gases (ionization and attachment coefficients, discharges in uniform field, Paschen's law, discharges in divergent fields, streamer inception criterion)
- Breakdown of liquid dielectrics
- Breakdown of solid dielectrics (intrinsic breakdown, electro-mechanical breakdown, thermal runaway, tracking)
- Grading systems
- Interfaces
- Partial discharges: physics, measurement and interpretation
- Insulation issues associated with the use of power converter in electrical machine drives.
Readings/Bibliography
Slides and notes provided by the teacher.
The documents are available on IOL for download.
Teaching methods
About 10% of the course consists of lab experiences.
Assessment methods
Oral examination
Teaching tools
The high voltage equipment in the lab. of innovation technology will be used to show how to use diagnostic systems.
Office hours
See the website of Andrea Cavallini