Advancements in Autonomous Battery Monitoring: A System with Auto-Return Home Integration

Abstract

Incorrect operation of protective devices in a power system can result in massive equipment damage, human casualties, and even power supply disruption. This research is to address the problem of wrong sequence of operation of relays and circuit breakers at the Station Road network. Short circuit analysis was performed using ETAP 19.0 to study the behavior of the network in the event of fault. Additionally, Inverse Definite Minimum Time (IDMT) is used to ensure quick response of the protective devices. In this study, the response times of the four relays are investigated when a 3-phase fault is injected into the feeder network. The findings reveal that the tripping sequence response from feeder breaker to 33kV line breaker to 33kV control panel breaker and finally to 11kV incomer control panel, are abnormal. The result of the improved scenario shows the relays tripping sequence are in the proper order from the main feeder to the 11kV incomer control panel, 33kV control panel breaker, and 33kV line breaker, with proper time grading. It is crucial to achieve the right order of relay operation for efficient protection and service delivery.