Diagnostika elektrických ochran na rozvodně R 110/35 kV Pardubice-Sever

Abstract

The purpose of this bachelor thesis is to get acquainted with the issue of a protection and protection in the electrical system and protection diagnostics of substation R110/35kV. The aim of the introduction is to describe the protection and protection, including the basic division of protections and fault analysis. Faults have a negative effect on the operation of the electrical system, which can cause serious damage to the technology. Faults in the electrical system are the main criteria for choosing the type of protections. In this document I present a link to the substation R 110/35kV Pardubice – North, CEZ Distribuce a.s., where I describe the current state and functionality of the substation, including sections of the protection of 110 and 35kV in the substation. Furthermore, there will be a description of the substation control, control system and communication, including fault recording. The final part of the document is focused on the diagnostics of electromechanical protections at the Pardubice – North substation for 110kV guidance. The processing of diagnostics on the distance protection of D 115, including the three-phase reclosing relay of OZ 111 X and the backup overcurrent protection of AT 31 X1, including the evaluation of measured values.