Modeling of the Transient Electric Field in Multilayer Dielectric Composites Under Impulsive HV Energization

This article presents the theoretical analysis of composite electrical insulation, formed from layered dielectric materials and subjected to impulsive energization. The 1-D planar cylindrical geometries were considered, consisting an arbitrary number layers with relative permittivity conductivity. Analytical solutions have been successfully derived for time-dependent electric field inside ${i}$ th layer. To demonstrate usage model under complex multilayer topologies where analytical are nontrivial, characteristics a 20-layer-graded microsecond sub-microsecond impulses analyzed validated against finite-element (FE) solver. Results indicate that transient response energization is strongly dependent on interplay between relaxation time constants characteristic timescales associated applied impulse. further development design coordination functionally graded (FGMs) insulation high-voltage (HV) system design. particularly relevant fast-rising conditions as often encountered in many pulsed power applications.