Ricerc@Sapienza

Metal Oxide Surge Arresters may represent an efficient choice for limiting lightning surges, significantly reducing the outage rate of overhead lines. The present work displays an analysis on the performance of gapless light-weight line surge arresters. The model recommended by IEEE is implemented in an FDTD model of overhead multiconductor lines by means of a local implicit scheme based on a set of non-linear equations. The model proves to ensure robustness and second-order accuracy.

Surge arresters may represent an efficient choice for limiting lightning surge effects, significantly reducing the outage rate of power lines. The present work firstly presents an efficient numerical approach suitable for insulation coordination studies based on an implicit Crank-Nicolson finite difference time domain method; then, the IEEE recommended surge arrester model is reviewed and implemented by means of a local implicit scheme, based on a set of non-linear equations, that are recast in a suitable form for efficient solution.