Overvoltage Protection and Isolation Coordination
Term: Summer
Announcements
Please participate at this years online-evaluation!
Details regarding the access will be sent via TuCan.
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New exam date for winter semester 19/20 is saturday 11th of July 2020 13:00 till 16:00 o'clock.
An exam preparation will be held on Tuesday 30th of June from 14:00 o'clock till 16:00 o'clock. Depending on number of participants the revision course will take place digitally or at the university. Therefore all interested students are asked to send an e-mail to: trautmann@hst.tu-…
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 saturday, 11th of July from 13:00 till 16:00 o'clock in room S306/052.
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The bonus work may be completed with groups of two students and has to be handed in until the exam date.
Upon completion of the tasks a bonus of 20 Points will be added to the exam grade.
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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