345kV/138kV LINE UPGRADE


345kV-138kV LINE UPGRADE

Our team is currently completing five remote end line upgrades. This project consists of two 345kV line relaying packages and three 138kV line relaying packages. The communication methods consist of Power Line Carrier or Fiber depending on the remote end. The SCADA/RTU system was also upgraded/modified. Relays used include SEL321, SEL 311, SEL 352, SEL 501, RFL 9780, RFL 9785, and SEL 2032. Schemes used were PLC OCB scheme, Fiber current differential, Step Distance and Breaker Failure.