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System Development of Identifying the Primary and Backup Pairs for Directional Overcurrent Relays Using Expert Theory System

Protection engineers has the job to update the current protection system once a change in the configuration of a system is done. The most tedious part of this is setting of the relays. Primary and backup relay pairs work in tandem to ensure that the protection system operates accordingly to the design by limiting an abnormality within its zone of protection. The goal of this study is to create a program which utilizes linear graph theory and other rules to determine the breakpoint set and relay pairs of a given network. The expert theory system having the outputs of breakpoints, relative sequence matrix and relay pairs for the coordination of directional overcurrent relays. The expert theory system had average relative errors of 16.67% 8.89% and 10% for breakpoints, relative sequence matrix and relay pairs respectively which can be contributed restrictions set in the proposed program. Fisher's exact test was used to test if there is a significant difference between the breakpoints, relative sequence matrix and relay pairs of the expert theory system and breakpoints, relative sequence matrix and relay pairs of test cases and the result was there is no significant difference which validates the accuracy of the program.