621.315 2 electric grid 2 електрична мережа 2 621.31 1 621.316.925 1 628.91 1 current 1 earth fault protection 1 electrical grid 1 electrical grids 1 mathematical model 1 neural grid 1 neuro-fuzzy grid 1 optimization 1 overhead lines 1 parameters series of wire cross-sections 1 prediction modes of electric grid 1 reactive power 1 reconstruction 1 temperature monitoring of air electric line 1 time element 1 unification 1 voltage 1 voltage fluctuation 1 wavelet transform 1 zero sequence 1 вейвлет-перетворення 1 захист від замикань на землю 1 напруга 1 нейро-фаззи сеть 1