cross-posted from: https://discuss.tchncs.de/post/127188
Have you ever heard of “net metering”?
It means that if your electric company gives you net metering, you can connect a generator or solar panels to your house and sell excess electricity back to the utility at the same price that they bill you for.
Sounds great right?
No, actually its a major problem for the utility.
The reason is that power plants take a significant amount of time to throttle up or down. If everyone in the area has solar power feeding back into the power grid, sudden changes in sunlight can cause major fluctuations and destabilize the power grid.
So what is the solution?
Dynamic pricing. Some areas already do this. How it works is that the price you pay (or receive) for electricity depends on the conditions on the power grid at the moment, updating as fast as possible.
When the grid has a deficit of power at the moment (maybe a power plant is struggling to throttle up to meet demand) the price goes way up.
If the grid has a surplus power at the moment, the price goes down, even going negative.(meaning you must pay to dump your power into the grid, or be paid for consuming excess power)
What this does is create an economic incentive for people to invest in equipment that actually stabilizes and supports the power grid.
For example if you have an electric car charging in your garage, it knows the price of power, and it can start charging faster when the price drops, or it can dump its battery power back into the grid when the price is high. The battery in your car is actually earning money as it sits idle!
Same with solar panels. Even if the installation doesn’t have batteries, the system can choose to stop selling power to the grid when it isn’t wanted.
Likewise, your heated pool can choose to absorb electricity when the price is low.
This is the future of the renewable energy economy in my opinion.
Thats great, but the pricing needs to be faster. 1 second updates or faster
I disagree. You need dynamic pricing but it needs to be manageable. Let’s say you start a cycle on the washing machine then a few minutes in the price suddenly jumps to an extreme high - that’s not manageable.
Giving users some warning throughout the day of price shifts actually meets the point of dynamic pricing better, too. The point is to get more power used when there is excess and less when supply is struggling. That doesn’t happen if people don’t get the chance to plan, even if that planning is only 30 minutes notice.
Every appliance will be controlled by the grid pricing. This isnt even a technical challenge, you can already walk into home depot and buy an internet connected “smart” dryer that will reorder fabric softener from amazon when you run out. A bit of reprogramming, and it can intelligently moderate its energy usage accordingly with the grid pricing. Price spike? Turn off the heating element and wait a few seconds until conditions improve.
This is the action that stabilizes (and lowers) the grid price. Every single thing thats consuming or generating electricity can respond in real time to keep the power grip functioning perfectly.