This paper provides an overview of a digital substation design approach with conventional and non-conventional measurement transformers. Design includes fiber-optic current sensors with the IEC 61850-9-2 Light Edition (LE) interface, protective relays with conventional and communication-based interfaces, time synchronization sources, communication devices and test gear. The site chosen for the installation is a double circuited 500kV transmission line that spans 224 miles and averages 10 faults a year.
File Type:
pdf