On 9/1/21 15:07, Haudy Kazemi via NANOG wrote:
Several articles have mentioned 8 transmission lines were lost to the
hurricane (a single big event event). A casual reader might think 8
lines would offer an 8-way level of redundancy.
My WAG is the reality of load vs capacity is more like a N-1 or N-2
redundancy, but that's really just a WAG. It is unclear to me if all 8
lines were damaged by the storm, or if some failed/tripped when loads
shifted onto the remaining lines after the first failure occurred
(cascading failure).
Does anyone know, or has anyone seen, details?
Several pictures showing massive steel "cat-style" towers on the ground,
as well as news reports that eight transmission lines are down.
Also saw a report that they will be isolating the storm area from the
grid and bringing in temporary power plant(s), restoring critical load
first.
--
Jay Hennigan - j...@west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV