Modelling and Experimental Validation of Temperature Rise in Metal Oxide Surge Arrester Blocks

Surge arresters arrest the surges generated in the power system, thereby protecting the equipment associated with power system network. The surge arrester fulfills its duty by providing high impedance for power frequency signals and low impedance for lightning and switching surge over voltages, which is reflected in its non-linear V-I characteristics. In this paper, models of surge arrester blocks of different classes and ratings are created as proposed by the IEEE working group. The residual voltage developed, the energy absorbed and the temperature rise is digitally simulated for different surge waveforms and is compared with the experimental results. The IEEE model parameters are derived from the dimensions of the blocks and also from the V-I characteristics obtained experimentally in…