A Review on Approaches Employed for Solving Directional Overcurrent Relays’ Coordination Problem

  • Shanker D. GodwalEmail author
  • Kartik S. Pandya
  • Vipul N. Rajput
  • Santosh C. Vora
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 608)


The directional overcurrent relay (DOCR) coordination is considered as a highly constrained, nonlinear, and non-convex optimization problem. In order to find the optimum solution of these problems, many extensive efforts have been kept by the researchers. The optimum solution of directional overcurrent relay which coordination can be obtained by choosing proper time–current characteristic of DOCR, appropriate selection of objective function, and right selection of soft computing technique. This paper gives the insight into various approaches employed for DOCRs’ coordination which are as optimization method-based approach, objective function-based approach, and standard and non-standard relay characteristic-based approaches presented in the past literature. Also, this paper discusses mathematical formulation for overcurrent relay coordination.


Relay coordination Plug setting Time multiplier setting Plug setting multiplier Relay characteristics 


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Department of Electrical EngineeringCSPIT, CHARUSATAnandIndia
  2. 2.Charotar University of Science and TechnologyAnandIndia
  3. 3.Dr. Jivraj Mehta Institute of TechnologyAnandIndia
  4. 4.Institute of TechnologyNirma UniversityAhmedabadIndia

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