Correlating protective relay reports for system-wide, post-event analysis

Abstract

The Blue Ridge Electric Cooperative has successfully implemented an automated system to collect intelligent electronic device (IED) oscillography reports. They are now participating in a pilot project to develop software that provides analysis of IED oscillography reports together from across their system. During a power system fault, IEDs provide high-accuracy, time-stamped power system measurements in the format of a high-sample-rate oscillography report. Traditionally, these oscillography reports are analyzed in order to understand the specific details of a fault and the IED operation during the fault. Bringing IED oscillography reports together from across a system into one analysis application improves post-fault analysis efficiency and reporting. It also enables the identification of trends over time, leading to improved system reliability. This paper shares the initial results and benefits that Blue Ridge Energy Cooperative has achieved by bringing IED oscillography from across their system together in one application.