engleski

Preventing Flashover near a Substation by Installing Surge Arresters

The paper describes a simulation procedure which can be applied in order to analyse the prevention of flashover near a substation by installing line surge arresters (LSAs). The demonstrated procedure includes the application of a three-dimensional electro-geometric model, description of modelling process, EMTP simulations and estimating the lightning performance of a high voltage substation. This is shown in the case study on the double-circuit line of 220 kV with one shield wire entering the substation. By locating LSA on a tower near a substation, the risk of backflashovers near the station is significantly reduced and the steepness and amplitude of incoming travelling waves are lowered, thus improving the protection performance of station arresters.

EMTP simulation; flashover; line surge arresters; high voltage substation

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