Krishnapatnam: The third 800 MW supercritical unit at the Sri Damodaram Sanjeevaiah Thermal Power Station here goes on stream on Thursday, over three years behind schedule, giving some respite to Andhra Pradesh that has been facing a shortage of power during evening peak hours. Stage-1 of SDSTPS with 2x800 MW supercritical units was inaugurated by the then Union Minister for …