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Impact of Arrester Models in Placement Determination at 150 kV Srondol Substation

Arrester is one of the most important equipment to protect substation equipment from overvoltage interference caused by lightning stroke. Previous studies had been issued several theoretical models for arrester in analytical purposes. However, no record about the use of models in practical. In substation, placement and amount of arrester are crucial aspects in design to protect the transformer and other vital equipment inside the substation. This work gives the impact analysis of arrester model as part of design in placement and distance inside Srondol 150 kV substation, Central Java Indonesia. An overvoltage interference caused by direct lightning stroke to the phase wire is simulated by using ATPDraw to observe the voltage value after impulse waveform passing through the arrester. There are three tested models i.e. IEEE model, Pinceti Model and Fernandez model to know the arrester effectiveness to reduce overvoltage below basic insulation level (BIL) of equipment. Several obtained results show the suitable modes to reduce the voltage based on provided distance location and number of arrester.