Diagnostika elektrických ochran na rozvodně R 22kV Olomouc-Hodolany

Abstract

This master thesis deals with the diagnostic of electrical protections with focusing on distribution grid. The thesis includes both a theory on the topic and a practical part. The theoretical part includes chapters 1 to 3. The first chapter deals with theory of protection and it defines the basic concepts, describes the faults in the electrical system and provides information about the design of protections. The second chapter describes the different types of protection. The third chapter is focusing on the protection of distribution grid. The practical part includes chapter 4. It describes the diagnostics of four protection SIPROTEC 7SJ85 at the substation Olomouc – Hodolany, R 22kV. This part also includes an analysis of the action of electrical protections in Sigra software and analysis of the speed of their action.