Design of Lightning Arresters for Electrical Power Systems Protection

• Main Author: Shehab Abdulwadood
• Format: Article
• Language: English
• Published: VSB-Technical University of Ostrava 2013-01-01
• Series: Advances in Electrical and Electronic Engineering
• Subjects: lightning; lightning arresters; mov; overvoltage; residual voltage.
• Online Access: http://advances.utc.sk/index.php/AEEE/article/view/661

This paper presents an overview of how the lightning strikes and their effects on power distribution systems can be modeled, where the results give a clear picture of how to eliminate the devastating impact, caused by lightning, by using lightning arresters. The program ATP-Draw (Alternative Transient Program) was used to simulate the problem and was applied on a part of a power network.The simulation was done once when the lightning strikes a transmission line and a substation with no lightning arresters in use and once more with their use. The source of the lightning was represented by the ATP models (Type-15 surge function and Type-13 ramp function) and the surge arrester was represented by the MOV-Type 92 component. The voltage was recorded at the substation 110/22 kV and at all loads in the electric network, and was drawn by the PlotXWin program. The results obtained indicate that the voltages induced by the lightning can reach values of the order of millions over insulation flashover levels for 22 kV equipment, where is clearly seen in Fig. 12 to 16 and Tab.10, which requires the installation of lightning arresters.