Analysis of the Behavior of Digital Protections of Transmission Lines When Subjected to Frequencies Outside the Operating Range, in a Real Case

EasyChair Preprint 15573

Abstract

This paper reports the improper operation of the overvoltage protection, in a real case, due to the estimation error of its phasors, when the frequency of the voltage signal was not compatible with the sampling frequency. It was possible to observe the recovery time of the frequency tracking signal. The results obtained by applying the simulation of the occurrence in the IED are also illustrated, as well as an analysis of the concepts applied in the calculations of the IED phasors. Thus, the conclusion is presented by exposing the solution adopted for the referred problem.

Keyphrases: Incorrect protection performance, Overvoltage protection, Phasor estimation, frequency tracking

@booklet{EasyChair:15573,
  author    = {Giovanni B. Fabris and Claudenei S. Simão and Marcelo L. Poleto},
  title     = {Analysis of the Behavior of Digital Protections of Transmission Lines When Subjected to Frequencies Outside the Operating Range, in a Real Case},
  howpublished = {EasyChair Preprint 15573},
  year      = {EasyChair, 2024}}