Three Dimensional Modelling Of HV Systems

The Numerical Electromagnetics Code (NEC) is applied to frequency-domain modelling of HV systems. This application results in an improved model in comparison with the lumped-distributed approach. The new model not only takes into account the geometry of each individual piece of apparatus but also includes the effect of coupling between different components of the HV system. The model additionally incorporates the effects of parasitic elements such as the inductance of a resistive divider or ground plane losses. The limitations and capabilities of the user-oriented implementation of the NEC in the analysis of HV systems are presented by modelling a few of the following problems: the electromagnetic interference (EMI) generated by discharging an RV impulse generator, the transfer function of a resistive divider, and the electromagnetic (EM) field distribution of a resistive divider.