On the local grids, mostly they won't be paying for energy from coal and gas, etc when they ask wind farms to curtail their production.Screwdriver wrote: ↑Wed Jun 07, 2023 4:31 pm Can't help feeling there's something seriously wrong with our energy companies motivations if they're paying wind farms to be idle while still churning out energy from coal and gas. I appreciate there are some logistical issues and no easy mass energy storage solutions (??) but even so, just seems wrong to do everything except actually use those magnificent creations.
As you have overproduction of electricity vs demand the price falls, and will get to the point where production from fossil fuels is not economic, so (subject to the agreements they have with the grid) they will stop production.
The windfarms will often be getting paid a standard tariff, irrespective of the market price, and their marginal cost of production is pretty close to zero, so they'll want to keep producing. They also have priority dispatch, so they are the last generators that the grid can request to stop providing power.
There's lots of grid constraints so across the whole network there'll be places where, say, wind power can't be taken (plenty of times that happens up here) as there isn't the ability to take all they would produce onto the grid whereas in other regions of the network there is still a need for e.g. gas-produced elec to be taken onto the grid.
It would be very rare (possibly unheard of) to have a position where constraint payments are being made to windfarms and coal is at the same time being burned to produce electricity.
Lots of gas plants are being paid money to have capacity on standby, and others to have quick response (battery banks for example), plus e.g. pumped hydro for storage and black start situations but that's all part of trying to have a stable grid, the issues of which are exacerbated by the proliferation of variable renewable sources of power without economic mass storage of generated (well, converted ) energy.