[time-nuts] Re: Power grid logging during the eclipse?

[Jeremy Nichols]

There are delay circuits built into most street lights, so it’s likely that
a 4-minute solar totality might not be long enough to trip the circuits.

Jeremy


On Thu, Apr 11, 2024 at 7:46 AM mcleannb--- via time-nuts <
time-nuts at lists.febo.com> wrote:

> Is the street lighting in that part of the world automatic like here down
> under? Did a whole bunch of street lighting sensors all detect dark at the
> same time and turn the street lights on?
> Nic
> Near Sydney Australia.
>
> -----Original Message-----
> From: Joseph B. Fitzgerald via time-nuts <time-nuts at lists.febo.com>
> Sent: Thursday, April 11, 2024 1:13 AM
> To: Discussion of precise time and frequency measurement
> <time-nuts at lists.febo.com>
> Cc: Joseph B. Fitzgerald <jfitzgerald at alum.wpi.edu>
> Subject: [time-nuts] Re: Power grid logging during the eclipse?
>
> The change in load on the grid was fairly unusual during the eclipse with
> rapid changes in the bulk power system.   See the graph linked below from
> grid operator ISO New England.    Y axis is megawatts of demand, while the
> x
> axis is Eastern Daylight time.    Both days were sunny, but we see the
> dramatic effect of the moon's shadow reducing the amount solar generation
> on
> the afternoon of the 8th.
>
> https://bhows.org/New_England_grid_eclipse.png
>
> It is not too surprising (to me anyway) that the grid frequency wandered
> around a bit during this unusual load swing.
>
> -Joe
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