Reliability and Application of Metal Oxide Surge Arresters for Power Systems

Thermal balance diagram modelling of surge arrester for thermal stability analysis considering ZnO varistor degradation effect

“…Producing a semi‐logarithmic plot of the V – I characteristic has been suggested in [8, 9]. This method can be only used in piecewise manner.…”

Application of finite element method for electro‐thermal modeling of metal oxide surge arrester

“…As mentioned above, the power loss characteristic and its model are required to investigate the thermal characteristics and stability of MOSAs. Many methods have been studied to approximate the V –I characteristic and electrical power losses curves in literatures such as: Producing a semi‐logarithmic plot of the V – I characteristic , new fitting equation based on physical principles of current conduction in the metal oxide material [13,14], continuous function of temperature at constant voltage level by the empirical data and interpolation [15,16], general exponent function , logarithmic function for Interpolation between each point of Voltage–current–temperature ( V – I – T ) characteristics [17,18], Complex function of the current density versus temperature and electric field and also, artificial neural network for estimation of power losses characteristics of ZnO varistors based on temperature and applied voltage .…”