As you know SWR does not have e-loco shed. It has to share locos with other zones like SR and SCR. As i understand thro a reliable source the power station near Someshwara station is yet to be charged and rlys are using WFD and SSPN power stations now.I was told to have uniform power supply without voltage problem the someshwara power station has to be ready.Once loco allocation is made by SCR,Prashanti and YPR-KCG train may have AC loco. The locos are also linked just like RSA of passenger trains.In the meanwhile doubling is also going on between YNK-PKD and DMM-GY. Hope more AC loco will haul passenger trains at the earliest.