Stateline Substation

The Stateline switchyard separation project focused on re-configuring the 345kV & 138kV transmission equipment to operate as a Transmission Substation and Switchyard. Aldridge's scope included an entire renovation of the stations relay and communication controls both inside the substation as well as at six separate remote substations, also included was the restoration of the substation yard equipment. For this to be completed Aldridge installed 34 new 138kV relay panels 2 new 138kV SCADA cabinets, 2 new DC power systems for the 138kV control building, 16 new 345kV relay Panels, 2 new 345kV SCADA cabinets, 1 new DC power system for the 345kV control building, 25 sets of 138kV switches, 3 new sets of 138kV CCVT's 1 set of 138kV CT's, as well as associated cable/wire terminations and grounding for all existing and new yard equipment. Also included is placement of new AC panels for the 34.5kV Capacitor Banks, demolition of (2) 345kV wave traps, and demolition of (6) 138kV OCB's. The majority of this project is outage driven with 7 separate transmission outages all with extremely tight deadlines.