IEC 61850-based digital substations with sampled values (IEC 61850 9-2) support are becoming more attractive and useful worldwide due to their unique features such as flexibility, reduced wiring cost, and technological benefits. These digital substations include various equipment such as merging units, sampled values-based relays, network switches, and time synchronization clocks. Monitoring is a major requirement in utility digital substations to observe the correct operation of equipment/sensors and capture power system events at various sampling resolutions. Utility applications demand monitoring applications such as wide area monitoring using synchrophasors, power quality calculations, fault location estimates, power swing detection and harmonic monitoring. This paper investigates the technical and application requirements, as well as solutions to the challenges related to developing a monitoring system suitable for IEC 61850-based fully digital substations.
N.Perera, C. Adewole, René Midence, A. Oliveira, Presented at PAC World Global Conference 2021, Virtual Event, August 2021