Numerical Simulation Analysis on Non-Conventional Lightning Protection System

This paper deals with numerical simulation analysis on non-conventional lightning protection system (SKAOR380) by charge transfer system (CTS). SK-AOR380 plays a role to reduce the probability of lightning strike by increasing electric field concentration between SK-AOR380 shade and ionizer, besides electric field at the lightning rod tip part is relieved. In other words, the corona dischrage is early initiated before lightning strike due to early generation of ionized free electrons between SK-AOR380 shade and ionizer by accumulating the induced charge from charged clouds with opposite polarity. To analyze charge behaviors, we considered fully coupled numerical model based on the charge continuity equations for positively charged ion, negatively charged ion and electrons. The results revealed that the SK-AOR380 creates a non-uniform electric field distribution with a large field enhancement causing ionization to initiate corona discharge under 300 kV lightning impulse voltage. This result is expected that the probability of direct lightning strike can be reduced by improved lightning protection rod.