It is of great significance to study the propagation characteristics of induced lightning of overhead distri-bution lines.This paper establishes a mathematical model for lightning overvoltage based on Electromagnetic Field Theory and Agrawal Field Line Coupling Equation.Firstly,it analyzes the main factors affecting the propagation characteristics of induced lightning overvoltage.Secondly,by using ATP-EMTP simulation software for modeling,it is found that different lightning current amplitude,ground conductivity and lightning strike point position greatly influence the induced lightning overvoltage waveform characteristics,therefore,practical considerations should be taken into account when calculating and analyzing.Finally,it is found that installing lightning arresters on the sub-station side in the simulation model can effectively suppress induced lightning overvoltage.
维普
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