EMI Analysis in a Power Drive System when the Grounding System is Exited by a Lightning Strike Using a Suitable Circuital Model

New circuital models of grounding systems and PDS for EMI analysis during a lightning strike

In this paper circuital models of a Power Drive System (PDS) and of grounding systems are proposed in order to analyse Electromagnetic Interferences (EMI) induced in a PDS when a lightning current flows in the grounding system. The models have been developed adopting the network approach with lumped parameters and have been implemented using the software MATLAB. A High Frequency (HF) model suitable to simulate the impulse response of a PDS is described and a generalized method in order to calculate the lumped parameters values of grounding system models is presented. The new method takes into account the burial depth of electrodes as regards their length. The validation results of this new …

New circuital models of grounding systems and PDS for EMI analysis during a lightning stike