Predictive dynamic model of the negative lightning discharge based on similarity with long laboratory sparks ߝ Part 1: physical process and modeling

This paper presents a predictive dynamic model enabling a description of the whole negative lightning discharge. The proposed model takes into account the different phases of the propagation (i.e., the initiation of the first corona, the pilot leader, the negative and space leaders and their junction up to the final jump). This model is based on an LCR line electrical network parameters derived with electromagnetic field, physical laws and gas discharge theories (L, C and R, being respectively the inductance, the capacitance and the resistance). Criteria for initiation, development, stand-off and some atmospheric conditions are also introduced. From this model the main macroscopic parameters of the negative lightning can be computed.