Human error causes blackout


October 1, 2020

A contractor at Southeast Alaska Power Agency’s Tyee Lake hydroelectric facility accidentally entered an incorrect control system input, resulting in a power outage in Wrangell and Petersburg Saturday morning, said SEAPA CEO Trey Acteson.

SEAPA staff were conducting a training session associated with recent control upgrades when the error was made. Tyee Lake generation was lost at 9:15 A.M. on Sept. 26, said Robert Siedman, an electrical engineer with SEAPA. Power was restored 25 minutes later at 9:40 A.M. All the Wrangell and Petersburg circuits were offline during the Tyee lake generati...

For access to this article please sign in or subscribe.


Reader Comments(0)


Powered by ROAR Online Publication Software from Lions Light Corporation
© Copyright 2024