Intelligent Substation Upgrades — IEC 61850

The project

P&C design and engineering for four IEC 61850-compliant intelligent substations — all-new relaying with redundant fiber, new batteries, auto-throw-over, and DNP integration with fire protection. Schemes include time-programmed tripping, load shedding and auto bus-tie closing.

Scope of work

• Four intelligent substations, IEC 61850 compliant
• 18 feeder relaying positions, 7 bus relaying positions
• 4 transformer positions with overload relief (TOR) and voltage regulation
• DC interlock, 2 line carriers, bus sectionalizing
• New batteries with monitoring, DC distribution panels
• Auto-throw-over switch, SCADA integration
• 138kV line relaying + communications upgrade; new 12kV switchgear building design
• Wiring diagrams, circuit & conduit schedules, fiber panels, procedures