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Distribution automation minimizes the number of customers impacted by a power outage and shortens the duration for those affected.

How does it work?

When a power outage occurs in a distribution automation-enabled area, the system automatically reconfigures the surrounding electric system to isolate the fault to the smallest section possible, thereby reducing the amount of customers impacted by the outage. By isolating the fault, distribution automation also helps electric crews locate and respond to faults spots more quickly, thereby restoring power faster than ever before.

The primary concepts of distribution
automation include:

    • Fault location: The location of a fault (outage) is determined based on sensors on the electric system.

    • Isolation: Once the fault has been located, the distribution automation system automatically opens switches on both sides of the faulted equipment to isolate it from the rest of the electric system. This feature also can help electric crews locate the trouble spots more quickly.

    • Service restoration: After the fault has been isolated, the distribution automation system reconfigures the electric system to re-energize un-faulted sections from neighboring electric lines.

    DA-enabled circuits:

    Currently, we have enabled 16 circuits in our service area with distribution automation, and have another 19 planned or in process for this year. 

    Completed In-Progress Currently planned for 2019
    Blaine (BCH13) Kent (PAN12) Dieringer (DGR16)
    Olympia (GRI13) Skagit County (PET16) Kingston (CHR23)
    Tumwater (PRI13) Bellingham (WOB23) Port Orchard (FNW17)
    Auburn, Kent, Federal Way (MVW13) Redmond (MSFT) King County (FCR12)
    Black Diamond (SOO25) Cle Elum (CAS15) Olympia (FRG24)
    Maple Valley (HOB15) Mercer Island (SME12) Vashon (VAS-12 Phase 2)
    Vashon (VAS12) Vashon (VAS-12 Phase 2) Bellevue (PRE14)
    Kenmore (ING15, ING13) Bellevue (EGT12) Enumclaw (OSC22)
    Mount Vernon (HKX16) Kenmore (KNM26)
    Woodinville (HWD25) Seabeck (CHI12)
    Oak Harbor (HLC23) King County (FCR14)
    Puyallup (WOO23)
    Mount Vernon (BKB13)
    Anacortes (PAD15)
    Kent (CAM26)
    Redmond (STR)