Online Adaptive Optimum Coordination of Overcurrent Relays

Ke Xu, Yuan Liao

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

4 Scopus citations


In power distribution systems, overcurrent relays (OC) are widely used for protection of the systems. The problem of overcurrent relay coordination in protection systems consists of selecting appropriate settings, satisfying the requirements of sensitivity, selectivity, reliability, and speed [1]. Existing optimum coordination methods usually assume conditions of fixed DG output and constant load in the distribution system, which is the static condition for the distribution system. When there is a variation of load or distributed generations in the distribution system, the above optimum coordination methods will fail to find the most desirable coordination of overcurrent relays under prevailing operating conditions. This paper proposes a novel solution for online adaptive coordination of overcurrent relays considering significant load variation and renewable generation variation for systems with increasing integration of renewable energy sources.

Original languageEnglish
Title of host publicationSoutheastcon 2018
ISBN (Electronic)9781538661338
StatePublished - Oct 1 2018
Event2018 IEEE Southeastcon, Southeastcon 2018 - St. Petersburg, United States
Duration: Apr 19 2018Apr 22 2018

Publication series

NameConference Proceedings - IEEE SOUTHEASTCON
ISSN (Print)1091-0050
ISSN (Electronic)1558-058X


Conference2018 IEEE Southeastcon, Southeastcon 2018
Country/TerritoryUnited States
CitySt. Petersburg

Bibliographical note

Publisher Copyright:
© 2018 IEEE.


  • Distributed generation
  • Genetic algorithm
  • Online adaptive protection
  • Variation of load

ASJC Scopus subject areas

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


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