Re: Carbon Monoxide warnings - keep generators outside 20ft away from doors and windows

[Haudy Kazemi via NANOG <nanog () nanog org>]

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?



On Wed, Sep 1, 2021, 16:12 Sean Donelan <sean () donelan com> wrote:

> One person has died and at least 27 people are being treated for carbon
> monoxide poisoning from portable generators.
>
> Officials are reminding people to operate portable generators only
> outside, 20 feet away from homes, doors and windows.  Not in carports,
> garages, basements.
>
> To restore power, Entergy has "islanded" (disconnected) the City of New
> Orleans from the regional grid and started a local power plant. The
> transmission lines were toppled during the storm, but the cables were
> still connected to the terminals. Islanding the city makes sense, but I
> don't remember a power company islanding large parts of the grid before.
> Public officials are now saying it may be 30+ days to fully restore power.
>
> Entergy has implemented restoration priority, which means hospitals,
> public safety and critical infrastructure will be restored first. Along
> with some incidental customers on the same circuits.
>
>
> Customers out of service
>
> Louisiana - 987,588
> Mississippi - 31,516
> Florida - 21,867
> California - 21,339
> Pennsylvania - 10,415
>
> Reminder, Puerto Rico still has not fully recovered from hurricanes in
> 2017.  Puerto Rico still has rolling blackouts.  And yes, Puerto Rico is
> an island, so its electric grid is naturally an island.
>
> The major wireless providers have activated their open roaming agreements,
> allowing customers to roam on any working infrastructure from other
> service providers.  They are also waiving overages and many other feeds in
> the affected region.  Check your service provider's website for details.
>
> AT&T says 82 percent of its network in service in Louisiana.
>
> First responders say the AT&T FIRSTNET failed (again) during the
> hurricane.
>
> T-Mobile says 70 percent of its network in service in Louisiana.
>
> Verizon says it has "gaps in coverage" but its network remains resilient.
> I don't know what that means.
>
> I haven't found reports from cable companies in the region.