PEEC modeling of lightning protection systems and coupling to coaxial cables

This paper proposes a partial element equivalent circuit (PEEC) model for the analysis of the electromagnetic environment inside a building during a direct or nearby lightning strike. A PEEC model for the lightning protection system (LPS) is developed in conjunction with a PEEC model for braided coaxial cables. A two-step matrix solution of the whole set of equations describing the LPS and cables allows one to predict the current distribution in the downconductors and the induced voltages and currents on the cables´ shield and loads. Results are given in frequency and time domain for direct and nearby lightning strikes and for different positions of the cables inside the LPS volume