Overvoltage Protection and Isolation Coordination
Term: Winter
Announcements
In exercise 2 some calculations with the electromagnetic transient program EMTP ATP will be done. This program is also needed to complete the bonus work. All students with access to a notebook are asked to bring that along.
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 WS 2019/2020
| Lecture | Date | Time | Room |
|---|---|---|---|
| 1st lecture | October 16th | 11:40 – 13:20 | S3|06 /053 |
| 2nd lecture | October 30th | 11:40 – 13:20 | S3|06 /053 |
| 3rd lecture | October 31th | 09:50 – 11:30 | S1|01 /A4 |
| 4th lecture | November 7th | 09:50 – 11:30 | S1|01 /A4 |
| Lecture on travelling waves | November 13th | 11:40 – 13:20 | S3|06 /053 |
| 5th lecture | November 20th | 11:40 – 13:20 | S3|06 /053 |
| 6th lecture | November 27th | 11:40 – 13:20 | S3|06 /053 |
| 7th lecture | November 28th | 09:50 – 11:30 | S1|01 /A4 |
| 8th lecture | December 4th | 11:40 – 13:20 | S3|06 /053 |
| 9th lecture | December 19th | 09:50 – 11:30 | S1|01 /A4 |
| 10th lecture | January 15th | 11:40 – 13:20 | S3|06 /053 |
| 11th lecture | January 22th | 11:40 – 13:20 | S3|06 /053 |
| 12th lecture | January 23th | 09:50 – 11:30 | S1|01 /A4 |
| 13th lecture | January 30th | 09:50 – 11:30 | S1|01 /A4 |
| 14th lecture | February 6th | 09:50 – 11:30 | S1|01 /A4 |
| 14th lecture | February 13th | 09:50 – 11:30 | S1|01 /A4 |
Dates of the exercise in WS 2019/2020
| Exercise | Date | Time | Place |
|---|---|---|---|
| 1st exercise | November 6th | 11:40 – 13:20 | S3|06/053 |
| 2nd and 3rd exercise | November 14th | 9:50 – 11:30 | S1|01/A4 |
| 4th exercise | November 21th | 9:50 – 11:30 | S1|01/A4 |
| 5th exercise | December 5th | 9:50 – 11:30 | S1|01/A4 |
| 6th exercise | December 11th | 11:40 – 13:20 | S3|06/053 |
| 7th exercise | December 18th | 11:40 – 13:20 | S3|06/053 |
| 8th exercise | January 16th | 9:50 – 11:30 | S1|01/A4 |
| 9th exercise | January 29th | 11:40 – 13:20 | S3|06/053 |
| 10th exercise | February 5th | 11:40 – 13:20 | S3|06/053 |
| 11th exercise | February 13th | 11:40 – 13:20 | S3|06/053 |
| Exam preparation | March 23th | tbd | tbd |
Exam
02.04.2020 at 13:00 – 16:00 o'clock in room S3|06/052
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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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