A Simplified Lightning Model for Metal Oxide Surge Arrester

Lightning strike has been one of the major factors that lead to failure of electrical power systems. In recent years, metal oxide surge arrester has been widely used and it is now an essential item in the insulation coordination for power systems based on its excellent electrical characteristics. Recently, the study of dynamic lightning model of metal oxide arrester has been conducted to provide an accurate performance in the operation. This paper presents a simplified lightning model for distribution-class metal oxide surge arrester derived from the IEEE Working Group (WG) 3.4.11 model. The model parameters were calculated from the standard data sheets obtained from the manufacturer. The effectiveness of the model was tested and compared with the residual voltage test results for typical lightning surges of 8/20ms