Abstract
Volt-ampere (V-I) characteristics are the most fundamental in metal oxide surge arrester modelin Although V-I characteristics have time domain properties of hysteresis and frequency dependency and such modeling research has been conducted, the residual voltage of an arrester has generally still been modelled only by the magnitude of discharge current, neglecting time domain properties.
Through the analysis of experimental results, the authors have found that energy dissipated during dischar reduces residual voltage and propose a new analytical model of residual voltage expessed by dissipation energy as well as discharge current as parameters. This model can be calculated in EMTP (Electro Magnet Transients Program) generally used in circuit analysis and well accounts for time domain properties above hysteresis and responses to steep wavefront current. It not only complies with the theory of conduction zinc-oxide element, but also quantifies the theory in a sense.
