[HN Gopher] Weather intelligence and cutting-edge tech is boosti...
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Weather intelligence and cutting-edge tech is boosting grid
capacity by 30%
Author : toomuchtodo
Score : 51 points
Date : 2024-01-13 19:56 UTC (3 hours ago)
(HTM) web link (electrek.co)
(TXT) w3m dump (electrek.co)
| jvdvegt wrote:
| This submission seems a dupe of
| https://news.ycombinator.com/item?id=38983687
| bostonpete wrote:
| How so? The submission you linked is a different article?
| toomuchtodo wrote:
| My post is the source per HN guidelines vs reblog.
|
| https://news.ycombinator.com/newsguidelines.html
| lyu07282 wrote:
| Can someone elaborate on how this works? Is that like optimizing
| power delivery based on the fact that power lines will have
| different power losses based on weather/temperature/humidity?
| conjecTech wrote:
| There is a good Volts[1] episode[2] on it. TL;DR the thing that
| limits how much power a line can carry is heat dissipation,
| which depends on weather. We used simple heuristic models to
| back out what we considered safe operating currents
| historically, but if you use sensors to enable a more data-
| intensive approach, you can operate closer to full capacity.
|
| [1] https://www.volts.wtf/
|
| [2] https://open.spotify.com/episode/4sqNcVcXdLF3QFDR6f5Vgd
| tuatoru wrote:
| So an alternative title is " ... is reducing safety margins
| by 50%".
|
| (Sensors sense what they are designed to sense, not other
| things, and sometimes lose calibration.)
| toomuchtodo wrote:
| Operating with unnecessary margin is wasteful and does not
| necessarily increase safety.
| gtvwill wrote:
| Said no ohs advisor ever.
|
| Engineering in buffer for safety is one of the most
| common practices.
|
| I mean hey if you wanna roll the dice standing up next to
| some high pressure hydraulic gear on machinery that's
| running a few psi away from failure because it's super
| efficient be my guest.
|
| But I'm not gonna enjoy the one day in 10000 when
| something goes a Lil awry and you get cut in half because
| old mate ordered hoses without steel sheathing because
| the unsheathed ones were rated for the same pressure but
| were cheaper and more cost efficient.
|
| That's some 1950s old world business ideology there.
|
| Also another example. All lifting straps for cranes and
| lifting hardware is generally capable of 3x to 4x its
| safe working load. Buffers are everywhere and they save
| lives.
| AnthonyMouse wrote:
| Accuracy and safety margins are two different things.
|
| Suppose you have to spec the capacity of a line
| regardless of what temperature it is, because you're not
| going to measure it in realtime at all. You estimate the
| highest temperature will be 105 degrees F, add e.g. a 20%
| safety margin, and call that the capacity of the line.
|
| That means when it's 40 degrees F, you could be operating
| with a 200% safety margin, which is unnecessarily
| conservative and wasteful. Conversely, because you're not
| measuring the temperature at all, your high temperature
| estimate could be wrong and there could be a day that
| it's 115 degrees F, your safety margin is completely gone
| and the line burns out, because you weren't monitoring
| the temperature. Whereas if you were, you'd lower the
| capacity of the line that day and not have problems.
| xnzakg wrote:
| > So an alternative title is " ... is reducing safety
| margins by 50%".
|
| Not necessarily. The _actual_ current limit depends on the
| climate conditions, and with static line rating the safety
| margin actually varies. So while dynamic line rating might
| reduce the safety margins when the conditions allow running
| more current, it can also increase the safety margin in
| case of a particularly hot summer.
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(page generated 2024-01-13 23:01 UTC)