Aiming at frequent faults existing in low voltage equipment
ATP-EMTP(ATPDRAW) was used to model and simulate overvoltage caused by lightning on the top of incoming transmission tower in one substation.Through establishing the digital simulation model of distribution transformers
power lines
arresters
grounding system
and relevant components
lightning points
operation modes
and tower grounding resistance were compared and the influence of important factors such as insulation corporation margin on lightning overvoltage were discussed.