Overvoltage Protection and Isolation Coordination
Term: Winter
Announcements
Grades and exam review
The grades of the exam in the summer term 2020 should have been published. Information regarding the review has been sent to all participant in a message via TuCan
Content
- Introduction: Definition and aims of Isolation co-ordination according to IEC 60071
- Determination of representative overvoltages:
- Origin and classification of overvoltages (Operating voltage and temporary overvoltages, Slow front overvoltages, Fast front overvoltages)
- Travelling wave effects on lines
- Characteristics of overvoltage protective devices
- Determination of co-ordination withstand voltage:
- Insulation strength for different voltage shapes and geometric configurations
- mathematical description of flashover probabilities
- Determination of required withstand voltage:
- Atmospheric correction
- Safety factor for internal and external insulations
- Standard withstand voltage and testing procedures
Dates of the lecture in SS 2020
| Lecture | Date | Time | Room |
|---|---|---|---|
| 1st lecture | April 20th | 11:40 – 13:20 | S102/330 |
| 2nd lecture | April 27th | 11:40 – 13:20 | S102/330 |
| 3rd lecture | May 4th | 11:40 – 13:20 | S102/330 |
| 4th lecture | May 11th | 11:40 – 13:20 | S102/330 |
| 5th lecture | May 18th | 11:40 – 13:20 | S102/330 |
| 6th lecture | May 25th | 11:40 – 13:20 | S102/330 |
| 7th lecture | June 8th | 11:40 – 13:20 | S102/330 |
| 8th lecture | June 15th | 11:40 – 13:20 | S102/330 |
| 9th lecture | June 22th | 11:40 – 13:20 | S102/330 |
| 10th lecture | June 29th | 11:40 – 13:20 | S102/330 |
| 11th lecture | July 6th | 11:40 – 13:20 | S102/330 |
| 12th lecture | July 13th | 11:40 – 13:20 | S102/330 |
| 12th lecture | January 23th | 11:40 – 13:20 | S102/330 |
Dates of the exercise in SS 2020
| Exercise | Date | Time | Place |
|---|---|---|---|
| 1st exercise | May 7th | 16:15 – 17:05 | S102/330 |
| 2nd exercise | May 14th | 16:15 – 17:05 | S102/330 |
| 3rd exercise | May 28th | 16:15 – 17:05 | S102/330 |
| 4th exercise | June 4th | 16:15 – 17:05 | S102/330 |
| 5th exercise | June 18th | 16:15 – 17:05 | S102/330 |
| 6th exercise | June 25th | 16:15 – 17:05 | S102/330 |
| 7th exercise | July 2nd | 16:15 – 17:05 | S102/330 |
| 8th exercise | July 9th | 16:15 – 17:05 | S102/330 |
| 9th exercise | July 16th | 16:15 – 17:05 | S102/330 |
| Exam preparation | TBD | TBD | TBD |
Exam
The exam will take place on Friday, 2nd of October from 11:00 till 14:00 o'clock in room S306/052.
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Additional reading
Please refer to chapter one of the slides of the lecture
A good overview about Isolation coordination is provided by:
Hileman, Andrew R.: Insulation Coordination for Power Systems, CRC Press, 1999
And regarding transient phenomena:
Haginomori, E.; Koshiduka, T., Arai, J. and Ikedam H.: Power System Transient Analysis: Theory and Practice using Simulation Programs (ATP-EMTP), John Wiley & Sons, 2016:
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