18-hi-2030-ue Overvoltage Protection and Insulation Coordination in Power System

Instructors: Prof. Dr.-Ing. Volker Hinrichsen; Dr.-Ing. Constantin Balzer

Event type: Exercise

Org-unit: Dept. 18 - Electrical Engineering and Information Technology

Displayed in timetable as: UE Überspann.-schutz

Subject:

Crediting for:

Hours per week: 1

Language of instruction: Englisch

Min. | Max. participants: - | -

Course Contents:

• Introduction, basics and overview
  
• Determination of representative overvoltages
  


• Origin and classification of overvoltages
  
• Normal distribution of overvoltage probability and derivated variables
  
• Operating voltage and temporary overvoltages
  
• Slow front overvoltages
  
• Fast front overvoltages
  
• Characteristics of overvoltage protective devices
  
• Operation and design of metal-oxide surge arresters
  
• Travelling wave effect and protective distance of surge arresters
  
• Representative voltage and overvoltages in the case of using surge arresters
  


• Determination of coordination withstand voltage
  


• Insulation strength for different voltage shapes and geometric configurations (gap factors)
  
• Performance criterion
  
• Insulation coordination procedure
  


• Determination of required withstand voltage
  


• General remarks
  
• Atmospheric correction
  
• Safety factor for internal and external insulations
  


• Standard withstand voltage and testing procedures
  


• General remarks
  
• Test conversion factors
  
• Determination and verification of insulation withstand by type tests
  
• Table of test voltages and required clearances
  

Literature:
The related IEC standard can be borrowed during the lecture time. Lecture notes (in English) and other helpful materials can be downloaded from HST homepage: www.hst.tu-darmstadt.de.

Preconditions:
High Voltage Technology I and II