Overvoltage Protection and Isolation Coordination

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

Dates of the exercise in SS 2020

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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