The failure point was a repeat of previous cold events -- it wasn't really a cascade event, of course, given wind turbines provide only 20% of power on the ECOT mini-grid.
Given there are similar capacity wind turbines running happily in Antarctica, and the heads-up from the 2011 & 2019 events to winterise the Texas fleet, it's difficult to see how this is a 'windmill problem'.
> ... but having so much capacity invested in unreliable wind generation was a very significant contributor to the blackouts that should not be ignored.
Has that grid suffered lots of blackouts at times other than big freezes?
If it hasn't, then that would suggest that the designers / operators of the grid factored in the unreliability of wind, and have the baseload well covered by gas, nuclear, etc.
> ERCOT is a world leader in wind production, and that was pretty punishing when its 25GW of wind capacity was producing 0.
And yet:
"About half of the state’s wind capacity was offline Sunday because of turbines that had frozen in west Texas, according to the Austin American-Statesman, but high winds from the winter storm were spinning coastal turbines faster and generating more power to offset those losses." [1]
> Winterization would have helped somewhat with less turbines freezing, but it doesn't help at all when the wind stops blowing.
'fewer'
I'm not sure where you're getting information that the wind stopped blowing, or why that's a reason to not use wind turbines as part of an overall power generation strategy, or indeed why you seem to be surprised that if ECOT prepared wind turbines, as well as gas & nuclear (which both lost a fair chunk of capacity) then the outcome wouldn't have been so appalling.
[1] https://www.usatoday.com/story/news/factcheck/2021/02/17/fac...
All of my information about the output of different sources comes from personally digging through ERCOT's minutely detailed reports[0]. I haven't seen a nice, neat fact-checking propaganda piece that deals with the relevant data, but I haven't really searched that hard because all the data is right there, straight from the source.
The "Fuel Mix Report" lists the output of each generation type in 15 minute intervals[1]. There are over 25000 GW of wind capacity, so we would expect to see a maximum of a bit less than 6250 GWh of wind output in the best 15 minute periods ("a bit less" is taking into account that we don't expect 100% output even in the best circumstances). The data matches this, as we see peaks reaching about 5600 GWh. The values are conveniently totaled for each day, and with a theoretical ceiling of 600,000 GWh capacity per day we see that the most actually produced on any day in Jan or Feb 2021 was 458,000 GWh on January 6th, 76% of capacity.
If we look at February 15, 16, and 17, wind output was 225,000 GWh for all three days combined, or a whopping 12.5% of capacity. This matches the pitiful performance that I was seeing in real time in ERCOT's feed.
None of the 15 minute periods report 0 GWh, the lowest being 149 GWh on Feb 15th. So either the granularity is not fine enough or I was just wrong to say that wind dropped to zero, and I would like to revise my position to say that wind output dropped to 2% of capacity.
Hopefully you can understand how I can both support intelligent use of wind power while being dismayed by fact-checking pieces that turn "only 25%" of our capacity being 87.5% offline into vague terms like "exceeded projections" and "wind wasn't a problem", as if 15,000-20,000 GW of capacity being offline was not a significant factor. (87.5% of 25,000 GW is 21,875 GW, but again I am not expecting wind to be able to produce at 100%).
> indeed why you seem to be surprised that if ECOT prepared wind turbines, as well as gas & nuclear (which both lost a fair chunk of capacity) then the outcome wouldn't have been so appalling.
This comes off like you're just making things up to troll me. I've specifically mentioned winterization many times. It's also very telling that, like the fact-checkers, you have to stick to vague terms like "lost a fair chunk of capacity" without getting into the actual numbers which would show how massive that disparity really is.
[0] http://www.ercot.com/gridinfo/generation [1] http://www.ercot.com/content/wcm/lists/181766/IntGenbyFuel20...
> ... but having so much capacity invested in unreliable wind generation was a very significant contributor to the blackouts that should not be ignored.
The word 'unreliable' is ambiguous here -- clearly world+dog understands that power generated by wind is highly variable, and ERCOT (as for any ISO, and similar orgs in other countries) maintains and improves their forecasts around this variability.
This is factored into the overall grid provisioning and maintenance of power to consumers. It's why I asked about the effect of this variability outside of major cold events. Evidently not so much?
So, using the word 'unreliable' in a way that sounds like wind turbines can't be trusted seems disingenuous, since there's no surprises with the way they operate, and the variability in the power they can generate.
Your comment that billions should have been invested in anything except wind, and this would have guaranteed significantly more electricity available - isn't supported by the facts. Nuclear, gas, and coal all failed in various but predictable ways.
So you're kind of conceding that winterisation would have helped, but only in the context of fewer wind turbines being taken out. The fact coal, gas, and nuclear failed, because they hadn't been properly protected against cold weather, you seem to be discounting.
I haven't stared at the ERCOT numbers, and am disinclined to do so -- the fact that much of the state was without power for several days, and early reports suggested the grid was some minutes away from catastrophic cascading failure, suggests to me that concise numbers aren't the important thing here.
What's clear is that despite the 2011 heads-up, and the audit two years ago that highlighted the continued lack of preparedness, it was way more than the predictable freezing of some wind turbines. The history and political motivation for this highly isolated ISO further highlights the problems of poor planning and poor regulation. Were they not so intentionally disconnected, power could have easily been sourced from elsewhere in the country.
I did find an interesting 'actual number' that their lack of maintenance for their wind turbines was a major contributory factor:
"Though frozen wind turbines were a contributing factor, wind shutdowns accounted for less than 13% of the outages, Dan Woodfin, senior director of system operations for ERCOT, told Bloomberg." [0]
Further in that article:
"According to a report from ERCOT, solar accounts for only 3.8% of the state's power capacity throughout the year. Wind energy accounts for 10% of Texas's winter energy capacity and throughout the entire year it is able to provide 24.8%, the second-largest source of energy in the state under natural gas, which accounts for 51%."
Which suggests your 25% figure is misleading, as that's a yearly average - it's 10% (about the same as nuclear) during that time of year.
[0] https://edition.cnn.com/2021/02/19/politics/texas-energy-out...
