Some observations for distance protection of power transmission lines

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper presents some observations related to distance protection for power system transmission lines. Classical distance protection relays adopt the line terminal voltage and line current to calculate the distance between the fault and the relay location and then make a decision on whether a tripping signal should be issued and, if so, what the time delay should be. An interesting question is: is it possible for two faults at different points of the system to result in the same bus voltage and the same line current at a relay location such that the relay cannot distinguish between them? This paper presents some of these scenarios that may impose challenges on distance relay settings and operation.

Original languageEnglish
Title of host publicationIEEE SoutheastCon 2009, Technical Proceedings
Number of pages5
StatePublished - 2009
EventIEEE Southeastcon 2009 - Atlanta, GA, United States
Duration: Mar 5 2009Mar 8 2009

Publication series

NameConference Proceedings - IEEE SOUTHEASTCON
ISSN (Print)0734-7502


ConferenceIEEE Southeastcon 2009
Country/TerritoryUnited States
CityAtlanta, GA

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Software
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Signal Processing


Dive into the research topics of 'Some observations for distance protection of power transmission lines'. Together they form a unique fingerprint.

Cite this