Brian Zinchuk is editor and owner of Pipeline Online
Summerview batteries near Pincher Creek. Photo by Clive Schaupmeyer
How long could Alberta’s wind power stay at 1 out of 4481 megawatts? Read on
SaskPower Minister Dustin Duncan recently told me I watch electricity markets like some people watch fantasy football. I would agree with him, if I knew anything about fantasy football.
I had some time to kill around noon on Feb. 8, and I checked out the minute-by-minute updates from the Alberta Electric System Operator. What I saw for wind power production was jaw-dropping to say the least. Alberta has built 45 wind farms with hundreds of wind turbines totalling an installed capacity of 4,481 megawatts.
My usual threshold for writing a story about this is output falling to less than one per cent – 45 megawatts. Its output at 11:07 a.m., Alberta time, in megawatts?
“1”
Ten minutes later:
“1”
30 minutes later:
“1”
How long can this last? Is there a fault with the website? There doesn’t seem to be.
12:07 p.m.
“1”
Strains of “One is the loneliest number” flow through my head.
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I’ve seen it hit one before briefly. Even zero for a minute or two. But this keeps going. And going. I keep taking screenshots. How long will this last?
1:07 p.m.
“1”
1:29 p.m.
“1”
Finally, there’s a big change at 2:38. The output has doubled.
“2.”
That’s 2.5 hours at one. How long will two last?
3:45 p.m.
“2”
4:10 p.m. – output quadruples – to a whopping eight megawatts.
It ever-so-slowly crept up from there. Ten hours after I started keeping track, total wind output had risen to 39 megawatts – still not even one per cent of rated output. Ten hours.
It turns out that wind fell below one per cent around 5 a.m., and stayed under that for 18 hours.
The argument has long been if it’s not blowing here, it’s blowing somewhere. Build enough turbines, spread them all over, and you should always have at least some wind power. But Alberta’s wind turbines are spread over an area larger than the Benelux countries, and they still had essentially zero wind for 18 hours. Shouldn’t 45 wind farms be enough geographic distribution?
Alberta’s wind power in installed across an area larger than the Netherlands (red), Belgium (pink) and Luxemburg (green) combined. www.thetruesize.com
The other argument is to build lots and lots of batteries. Use surplus rewewable power to charge them, and then when the wind isn’t blowing (or sun isn’t shining), draw power from the batteries.
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Alberta has already built 10 grid-scale batteries. Nine of those are the eReserve fleet, each 20 megawatt Tesla systems. I haven’t been able to find the price of those, but SaskPower is building a 20 megawatt Tesla system on the east side of Regina, and its price is $26 million.
From over a year’s frequent observation, it’s apparent that the eReserve batteries only put out a maximum of 20 megawatts for about an hour before they’re depleted. They can run longer at lower outputs, but I haven’t seen anything to show they could get two or five hours out of the battery at full power. And SaskPower’s press release explains its 20 megawatt Tesla system has about 20 megawatts-hours of power. This corresponds very closely to remarks made by Alberta Premier Danielle Smith, along with the price of about $1 million per megawatt hour for grid-scale battery capacity.
She said in late October, “I want to talk about batteries for a minute, because I know that everybody thinks that this economy is going to be operated on wind and solar and battery power — and it cannot. There is no industrialized economy in the world operating that way, because they need baseload. And, I’ll tell you what I know about batteries, because I talked to somebody thinking of investing in it on a 200 megawatt plant. One million dollars to be able to get each megawatt stored: that’s 200 million dollars for his plant alone, and he would get one hour of storage. So if you want me to have 12 thousand megawatts of storage, that’s 12 billion dollars for one hour of storage, 24 billion dollars for two hours of storage, 36 billion dollars for three hours of storage, and there are long stretches in winter, where we can go weeks without wind or solar. That is the reason why we need legitimate, real solutions that rely on baseload power rather than fantasy thinking.”
Alberta Premier Danielle Smith: “I want to talk about batteries for a minute, because I know that everybody thinks that this economy is going to be operated on wind and solar and battery power — and it cannot. There is no industrialized economy in the world operating that way,… pic.twitter.com/QCb2eufuEB
— Paul Mitchell (@PaulMitchell_AB) October 27, 2023
So let’s do some math to see if the premier is on the money.
If you wanted enough batteries to output the equivalent of the 4,481 megawatts of wind for one hour (minus the 1 megawatt it was producing), that’s 4480 megawatts / 20 megawatts per battery = 224 batteries like those in the eReserve fleet. But remember, they can only output their full power for about an hour. So the next hour, you need another 224, and so on. For 18 hours, you need 4032 batteries. Let’s be generous and subtract the miniscule wind production over that time, and round it to 4,000 batteries, at $26 million a pop. (Does Tesla offer bulk discounts?)
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That comes out to $104,000,000,000, in batteries, alone, to cover those 18 hours on Feb. 8. To make it easier on you, $104 billion. If you use Smith’s numbers, it’s $80.6 billion. Even if I’m out by a factor of two, it’s an obscene amount of money.
But wait, there’s more!
You would also need massive amounts of transmission infrastructure to power and tie in those batteries. I’m not even going to count the dollars for that.
But you also need the surplus power to charge all those batteries. The Alberta grid, like most grids, runs with a four per cent contingency, as regulated by NERC. Surplus power is often sold to neighbours. And there’s been times, like mid-January, where that was violated, resulting in a series of grid alerts.
At times when there’s lots of wind and solar on the grid, there’s up to around 900 megawatts being sold to B.C and other neighbours. But for 18 hours (not days, but hours), you need 4,000 batteries * 20 megawatt-hours per battery = 80,000 megawatt hours. Assuming 100 per cent efficiency in charging (which is against the laws of physics, but work with me here), if you had a consistent 900 megawatts of surplus power, it would take 89 hours to charge them (if they could charge that fast, which is unlikely).
That’s surplus power you are not selling to an external client, meaning you’re not taking in any extra revenue, and they might not be getting the power they need. And having 900 megawatts is the exception here. It’s much more like 300 megawatts surplus. So your perfect 89 hours to charge becomes 267 hours (11.1 days), all to backfill 18 hours of essentially no wind power.
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This all assumes at you’ve had sufficient surplus power to charge your batteries, that days or weeks of low wind and/or solar don’t deplete your reserves, and the length of time they are needed does not exceed your battery capacity.
Nor does it figure in how many years life are you going to get out of those batteries in the first place? How many charge cycles before you have to recapitalize the whole fleet?
For the dollars we’re talking here, you’re easily better off to four (or more) Westinghouse AP-1000 reactors, with 1,100 megawatts capacity each. Their uptime should be somewhere around 90 per cent. That gives you solid, consistent baseload power, without the worry of the entire fleet going down, like wind did in Alberta on Feb. 8, as well as Feb. 4, 5, 6, and 7.
Indeed, according to X bot account @ReliableAB, which does hourly tracking of the Alberta grid, from Feb. 5 to 11:15 a.m., Feb 9, Alberta wind output averaged 3.45 per cent of capacity. When he ads in all of Feb. 8, that number will fall significantly. So now instead of 18 hours, we’re talking 108 hours needing 96+ per cent to be backfilled. I don’t have enough brain power to figure it out.
Wind capacity between midnight February 05, 2024 and February 09 @ 11:15.
Total hours: 108
> 10% of nameplate capacity for 5 hours.
< 5% of nameplate capacity for 71 hours.
< 1% of nameplate capacity for 50 hours. https://t.co/oY62nm24wI— Reliable AB Energy (@ReliableAB) February 9, 2024
You can argue we only need to backfill X amount of wind, maybe 25 per cent, since you can’t count on wind to ever produce 100 per cent of its nameplate across the fleet. But Alberta has thousands more megawatts of wind on tap to be built as soon as the province lifts is pause on approvals. If they build all of it, maybe the numbers I provide will be that 25 per cent. Who knows? The point is all of this is ludicrous.
Just build reliable, baseload power, with peaking capacity. And end this foolishness.
Brian Zinchuk is editor and owner of Pipeline Online, and occasional contributor to the Frontier Centre for Public Policy. He can be reached at brian.zinchuk@pipelineonline.ca.
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