You're allowed to just disconnect solar panels. It's free and does not damage them.
Why not have the panels disconnect themselves in this case? Is this too small an expense to justify the cost of additional hardware to manage switching on and off?
This is literally what local and state government is for; talk to others and get policy moving on excess energy being used to generate bulk stored energy at scale for winter months, be that gas, deep thermal storage, tradable goods to offset winter costs, etc.
Yes, we still have six active bauxite mines providing feedstock for six alumina refineries ... they're optimal as pipelined processing and not great at switching on|off with energy surges.
I'm in favour of home PV and community batteries | larger area "peak" use industries - it's a sensible long term use of cyclic energy production.
What are the challenges to incline rail lifting a lot of material up a mountain to roll down later?
Water freezes, slopes with snow can be unstable, cold weather is hard on gears, etc.
Large (in old mine shafts and chambers?) thermal mass storage has potential, not dissimilar to "heavy" (not suitable for EV) recent battery technologies.
Are there any serious tidal races in Scandy lands that can be tapped?
It's a poser alright.
OTOH there's mines, but oddly enough I've seen no discussion in the media of using them.
So.. there's no simple land/geographic features worth exploiting. OTOH some storable liquid/gas is more realistic. There's also sand batteries - Helsinki city has one - but they're maybe not so easy to do residentially/DIY, I would expect the neighbors to complain.
The GP comment mentioning "Scandanavia" seemed like a good excuse to spitball ideas with mountains - but as outlined they're no easy fix either - you can't just put a big dam anywhere without potential dangers and cold climates have issues with freezing, expansion, contraction, etc.
Where I'm at we're more concerned with overnight power for massive 24/7 continuous operation than with longer nights and less light in winter .. that's simply not a thing here.
So AFAICT mass PV is a distinct possibility, and if it can be leveraged to reduce the cost of wintertime energy usage, it will find a firm foothold.
US pricing works very differently, especially in Texas.
And finally electricity is a spot market. So there is agreed price for certain period and in some cases market can be distorted and that price can be negative. It could be idiotic subsidies or production that can't be ramped as effectively. Or someone does massive mistakes with their bids, think of trading bots going wrong.
* (< 1 millisecond for electricity but hey for the milk analogy say 10 minutes).
The main issue with consumer solar connected to the grid is the lack of predictability. The reason why we charge if you put electricity on the grid when too much energy is produced is because we did not plan on offsetting this production, and the network people have to keep it balanced. Reducing the output of thermal fossil plants is usually free, but while we can module nuke plants, it's best and way cheaper when that is predicted (also, opportunity cost is high, so for privately owned nuke plants, it cost even more. EDF is the bitch of the European electricity market so they eat the opportunity costs, but they are the only plant owner who does it (and I won't talk about ARENH here, but again, EDF is the bitch of the EU). Then, when really to much shit is on the grid, and you have reservoir space, you pump the water up the STEP (batteries, but better). Up to 4500€/mwh if unpredicted (it's never actually that, but it's the price seer in the SPOT command order). And lastly, if it's the only solution, wind/solar farms are shut down. Again, if predicted, good time to do the maintenance.
In the future consumer grade installations will probably come with a lot of stuff to help with the lack of predictability. I don't love it, but that's actually my current job (well, I actually love the actual job, really interesting shit, I'm not so sure about the moral implications of even more surveillance. Because we do have the geoloc of the newer installations. We don't link it with anything relevant yet, and it's anonymous for the moment, but will it stay that way?)
Is there a reason that consumer solar can’t be accounted for as smaller stable nodes in the system (sounds like they are still considered volatile and not a reliable source of inflow power)? For instance, maybe a rooftop solar array can easily be sucked up if the home decides to do a few loads of laundry that day, and therefore since there aren’t enough homes with solar arrays, it’s harder to predict an average influx per day from consumer solar to power the grid?
Are there any goals to shut down larger plants or not build larger solar fields by instead subsidizing distributed solar on peoples’ property?
Utilities are so interesting. The other afternoon I was looking out at the hills as the trees change, and said to my friend, “what a beautiful view… besides all these power lines! Although, I’d rather have the infrastructure than an unmolested view…”
It's not my subject (i mostly work on automation for the network and security teams), but when i consider some changes we did last year, i think the issue with consumer-grade solar is that we didn't know where installation number XXXX was set, not even which country it was from. That is changing, we will now know if it's near Paris, near Munich, near Barcelona... That will probably help with output prediction. I think at some point there were talk about using geoIP, but that was shut down for some reason (i think it was a mix of geoIP lying, and privacy/GDPR considerations we weren't ready to tackle on yet).
Some industrial users have variable demand, and a lower (or negative) price could encourage them to use more. A multi-region internet service might send more traffic to a datacenter with negative electricity prices, even if in increases latency for users.
Some producers need time to modulate output, and stopping and restarting can be expensive. Solar and Wind are at least technically easy to start/stop, but subsidies may make it economic to pay the grid to deliver electricity; either because of contracts/subsidies, or because the expense to deliver unwanted electricity is less than the expense to monitor pricing and reduce production.
Would this lead to grid needing to be shut down?
If there is no grid-side demand for the energy from my solar panels, then they're not going to be force-feeding it to a grid that doesn't want it.
When you plug a light bulb that's rated to draw 20 watts into a power source capable of delivering 1000 watts, it doesn't blow up your light bulb, because the light bulb only takes what it needs from the source.
If the plant shuts down because it's no longer economically viable/doesn't cover operating costs, what happens next winter?
This ain't gonna happen. Air conditioning will be saving lives.