Návrh a nastavení elektrických ochran ve spínací stanici 22 kV Frýdek-Místek – Slezská

Abstract

In this thesis the first part describes definitions of protection concepts, overcurrent protection, their distribution and principles of their functionality. The next part is the theoretical analysis of short-circuit currents. The following is a description of the switching station 22 kV Frýdek-Místek - Slezská, its current state, and reasons for modernization of this switching station. Calculation of short-circuit currents for incoming and outgoing lines, including setting of overcurrent stages, short-circuit stages and overcurrent protection delay time. Finally, setting ground directional protection.