engleski

Monte Carlo based efficiency assessment of lightning protection system

This paper presents an algorithm for the efficiency assessment of LPS (Lightning Protection System) of buildings and high voltage switchyards. Lightning strikes are simulated by means of the Monte Carlo method, with the application of electrogeometric model. The peak value of the lightning current, in each case, is also stochastically chosen from the logarithmic normal distribution. In the stochastic model, LPS and structure or switchyard can be approximated by a number of straight segments, triangles and plane quadrangles. Origin of the lightning strikes is located on the imaginary plane above the structure. Each lightning strike starts its descend on this plane and follows a stochastic path toward the protected structure or earth surface. Minimal distance from the lightning stroke stepped leader head to elements of LPS, structure and earth surface is computed after the each jump. If this distance is smaller then the striking distance, lightning will strike its nearest point belonging to the LPS, structure or the earth surface. Efficiency of the LPS is seen as quotient between the total number of lightning strikes ending up on LPS itself and the total number of lightning strikes. Lightning strikes hitting the earth surface are not counted.

electrogeometric model; lightning protection system; Monte Carlo method; stochastic efficiency assessment

Rad spada u kategoriju A jer je objavljen u časopisu koji je zastupljen u SCI – Expandedu (NN 84/05.)