DETERMINATION OF REQUIRED DURATION OF THE PAUSE OF SINGLE-PHASE AUTOMATIC RE-ACTIVATION IN OVERHEAD LINES BASED ON CONDITION OF QUENCHING THE SUPPLY ARC CURRENTS
The article deals with the features of calculation schemes and algorithms for the analysis of regenerating voltages and currents of arc recharge (TDP) in transposed air lines. During operating ultra-high voltage lines (SVN), the vast majority of single-phase short circuits (short circuits) are unstable, i.e. they can be eliminated in the cycle of single-phase automatic re-activation (SPAR). Thus, SPAR is important measure to improve the reliability of ultra-high voltage transmission lines. The non-current pause of the SPAR must exceed the arc quenching time by 0.2 seconds to ensure the restoration of the electrical strength of the arc channel. In addition, the pause should not be less than 0.5 seconds, since this time is necessary for the complete deionization of the initial powerful channel of the single-phase short-circuit arc. Efficiency of SPAR can be enhanced greatly if to capture certain factors or parameters, during non -current pause due to cycle single-phase automatic reclosing and their changes to determine the status of the secondary arc, and, most importantly, the moment of its maturity, and then re-enabling happens. It is also necessary to monitor the stability of the short circuit to exclude the possibility of unsuccessful re-inclusions.