SF POWER: Dec 16 briefing and indepedent analysis

[Sean Donelan <SEAN () SDG DRA COM>]

For those wondering how a single human error could take down a chunk
of the power grid, it now appears there were at least two failures
involved in the San Francisco blackout.  The original root cause: the
failure to remove safety grounds; and a second failure in the protective
systems.  The second failure in the protective systems is now under
investigation.
http://www.pge.com/whats_new/news/outage.html

PG&E has added a 2nd backup system to the San Mateo plant.  Exactly
what the second backup system is supposed to do, wasn't clear from
the PG&E statement.

In addition to PG&E's internal investigation, there are now two other
independent investigations by the California Public Utility Commission
and the California Independent System Operator.  This power outage seems
to have struck a nerve.  I don't remember there being this type of
hostility after the double Western States blackouts in 1996.
-- 
Sean Donelan, Data Research Associates, Inc, St. Louis, MO
  Affiliation given for identification not representation