Overvoltage Protection and Isolation Coordination
Term: Summer
Announcements
This thursday, 16th of april 2020, there will be a test-meeting on zoom at 11:00 am. By participating, you can make sure that you may follow properly the lectures of this summer term. The link as well as the password will be sent via a TuCan message shortly.
Information regarding the start of the lecture
As there will be no face-to-face courses until 1th of june at TU Darmstadt, the first lectures will be held via a conference tool (More information will follow soon). The times and dates are listed beneath.
Start of the lecture is april, 20th, 2020.
Due to the current developments (Information coronavirus) the exam for the lecture insulation coordination and overvoltage protection will also be postponed.
New exam date is saturday 11th of July 2020 13:00 till 16:00 o'clock.
A new date for exam preparation will folllow soon
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.
Access restricted section: Log in to see this section.
Access restricted section: Log in to see this section.
Access restricted section: Log in to see this section.
Access restricted section: Log in to see this section.
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:
Access restricted section: Log in to see this section.