The problem, though, is ERCOT chose a pretty generous (for them) extreme peak load. 2011 was not that cold and we estimate their extreme peak load will be exceeded in about 10% of the winters.https://t.co/mn7iQULiSq
— Andrew Dessler (@AndrewDessler) November 19, 2021
But even with this optimistic peak load scenario, the picture is not pretty. @ERCOT_ISO estimates that such a demand combined with unexpected outages of thermal plants and low renewable production would result in a shortfall of 7.1 GW.
— Andrew Dessler (@AndrewDessler) November 19, 2021
That's a shortfall of 10%!
And the shortfall gets a lot worse if 1) demand is higher than this extreme scenario (10% chance) or 2) if a lot more power is knocked offline because of cold temperatures. It's worth noting that significant power failures occurred in 2011, which caused a blackout that year.
— Andrew Dessler (@AndrewDessler) November 19, 2021
While a repeat of the 2021 winter blackout is unlikely (1-in-100 chance), it's clear that we could easily see a less severe blackout this year. I would put the chance at 1 in 10 or 1 in 20, consistent with the fact that we get blackouts here about every decade or two.
— Andrew Dessler (@AndrewDessler) November 19, 2021
The only thing that could reduce the chance of a blackout is if the ERCOT grid has somehow gotten more resilient over the last 6 months. It's possible because some things have changed — e.g., designating some natural gas infrastructure as critical so power to it doesn't get cut.
— Andrew Dessler (@AndrewDessler) November 19, 2021
But there's a real "rearranging deck chairs on the Titanic" vibe to ERCOT energy policy, so I'm doubtful these things will make a huge difference. Perhaps future actions will improve the resilience of the grid, but they're not going to help this winter.
— Andrew Dessler (@AndrewDessler) November 19, 2021
Should I buy Generac stock?