A Comparative Study on Scenario Based Optimal Overcurrent Relay Coordination for Distribution System with Distributed Generator Using Linear Programing


Chakit Plongkrathok and Keerati Chayakulkheeree*

School of Electrical Engineering, Institute of Engineering

Suranaree University of Technology, Thailand, This email address is being protected from spambots. You need JavaScript enabled to view it.



This paper presents the optimal coordination of overcurrent relay (OCR) with the presence of distributed energy resources (DER) using linear programming techniques. In addition, a comparative scenario-based between non-adaptive relay settings and adaptive relay settings has been investigated. A four-bus radial distribution system is used to test the proposed method. The simulation prosperously has shown that the linear programing can successfully solve for optimal OCR coordination. Meanwhile, an adaptive relay setting can handle the overcoming distribution network problem more efficiently than a non-adaptive relay setting.