SOUTHWEST ARKANSAS ELECTRIC COOPerative – genoa south substation
Client: Southwest Arkansas Electric Cooperative
Location: Russellville, Arkansas
TOTH designed Genoa South Substation in 2012 for Southwest Arkansas Electric Cooperative. Genoa South is a 10 MVA distribution substation that serves mostly residential load through four 12.47 kV feeders. The substation is fed from a radial 69 kV transmission line that terminates on a full-tension A-frame dead-end structure. A 69 kV circuit switcher isolates the transformer from potentially destructive currents. The 12.47 kV feeders are protected by vacuum circuit breakers with integral digital protective relays. The distribution structure features a transfer bus to allow for uninterrupted service while performing breaker maintenance. A pre-fabricated concrete control building houses digital protective relaying equipment, metering equipment, a 48 Vdc battery backup system, and auxiliary ac & dc load centers for the station. Structures and bus were designed for simplified utilization of a mobile substation during transformer maintenance and failure events.
Tasks performed include site selection, site layout, grading design, fence design, oil containment design, structural & foundation design, bus design, ground grid design, design of lightning protection, equipment specification, protective relaying application, relaying circuit design, auxiliary circuit design (ac and dc), dc load analysis & battery sizing, project management, and implementation of metering & SCADA systems.