Sign In or Create an Account.

By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy

Podcast

Spain’s Blackout and the Miracle of the Modern Power Grid

Rob and Jesse go deep on the electricity machine.

The blackout in Spain.
Heatmap Illustration/Getty Images

Last week, more than 50 million people across mainland Spain and Portugal suffered a blackout that lasted more than 10 hours and shuttered stores, halted trains, and dealt more than $1 billion in economic damage. At least eight deaths have been attributed to the power outage.

Almost immediately, some commentators blamed the blackout on the large share of renewables on the Iberian peninsula’s power grid. Are they right? How does the number of big, heavy, spinning objects on the grid affect grid operators’ ability to keep the lights on?

On this week’s episode of Shift Key, Jesse and Rob dive into what may have caused the Iberian blackout — as well as how grid operators manage supply and demand, voltage and frequency, and renewables and thermal resources, and operate the continent-spanning machine that is the power grid. Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.

Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.

You can also add the show’s RSS feed to your podcast app to follow us directly.

Here is an excerpt from our conversation:

Robinson Meyer: So a number of people started saying, oh, this was actually caused because there wasn’t enough inertia on the grid — that Spain kind of flew too close to the sun, let’s say, and had too many instantaneous resources that are metered by inverters and not by these large mechanical generators attached to its grid. Some issue happened and it wasn’t able to maintain the frequency of its grid as needed. How likely do you think that is?

Jesse Jenkins: So I don’t think it’s plausible as the precipitating event, the initial thing that started to drive the grid towards collapse. I would say it did contribute once the Iberian grid disconnected from France.

So let me break that down: When Spain and Portugal are connected to the rest of the continental European grid, there’s an enormous amount of inertia in that system because it doesn’t actually matter what’s going on just in Spain. They’re connected to this continen- scale grid, and so as the frequency drops there, it drops a little bit in France, and it drops a little bit in Latvia and all the generators across Europe are contributing to that balance. So there was a surplus of inertia across Europe at the time.

Once the system in Iberia disconnected from France, though, now it’s operating on its own as an actual island, and there it has very little inertia because the system operator only scheduled a couple thousand megawatts of conventional thermal units of gas power plants and nuclear. And so it had a very high penetration on the peninsula of non-inertia-based resources like solar and wind. And so whatever is happening up to that point, once the grid disconnected, it certainly lacked enough inertia to recover at that point from the kind of cascading events. But it doesn’t seem like a lack of inertia contributed to the initial precipitating event.

Something — we don’t know what yet — caused two generators to simultaneously disconnect. And we know that we’ve observed oscillation in the frequency, meaning something happened to disturb the frequency in Spain before all this happened. And we don’t know exactly what that disturbance was.

There could have been a lot of different things. It could have been a sudden surge of wind or solar generation. That’s possible. It could have been something going wrong with the control system that manages the automatic response to changes in frequency — they were measuring the wrong thing, and they started to speed up or slow down, or something went wrong. That happened in the past, in the case of a generator in Florida that turned on and tried to synchronize with the grid and got its controls wrong, and that causes caused oscillations of the frequency that propagated all through the Eastern Interconnection — as far away as North Dakota, which is like 2,000 miles away, you know? So these things happen. Sometimes thermal generators screw up.

Music for Shift Key is by Adam Kromelow.

Blue

You’re out of free articles.

Subscribe today to experience Heatmap’s expert analysis 
of climate change, clean energy, and sustainability.
To continue reading
Create a free account or sign in to unlock more free articles.
or
Please enter an email address
By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy
Energy

Let’s Make It Easier To Plug Data Centers Into Power Plants, FERC Says

Federal energy regulators directed the country’s largest grid to make its rules make sense.

Wires and pipes.
Heatmap Illustration/Getty Images

Federal energy regulators don’t want utilities and electricity market rules getting in the way of data centers connecting directly to power plants.

That was the consensus message from both Republican and Democratic commissioners on the Federal Energy Regulatory Commission Thursday, when it issued its long-awaited order on co-location in PJM Interconnection, the country’s largest electricity market, covering the Mid-Atlantic and Midwest.

Keep reading...Show less
Blue
AM Briefing

Research Revision

On PJM’s auction, coal’s demise, and a murder at MIT

The National Center for Atmospheric Research.
Heatmap Illustration/University Corporation for Atmospheric Research [C. Calvin]

Current conditions: Flooding continues in the Pacific Northwest as the Pineapple Express atmospheric river dumps another 4 inches of rain on Oregon • A warm front with temperatures in the 60s Fahrenheit is heading for the Northeast • Temperatures in Paraguay are surging past 90 degrees.

THE TOP FIVE

1. Trump set to dismantle one of the world’s leading Earth science institutes

The Trump administration plans to dismantle the National Center for Atmospheric Research in Colorado. Founded in 1960, The New York Times credited the center with “many of the biggest scientific advances in humanity’s understanding of weather and climate.” But in a post on X late Tuesday evening, Russell Vought, the director of the White House’s Office of Management and Budget, called the institute “one of the largest sources of climate alarmism in the country,” and said the administration would be “breaking up” its operations. It’s just the latest attempt by the White House to salt the Earth for federal climate science. As I wrote in August, the administration went as far as rewriting existing climate reports.

Keep reading...Show less
Yellow
Carbon Removal

DAC Is Struggling in America, But It’s Big in Japan

With new corporate emissions restrictions looming, Japanese investors are betting on carbon removal.

Heirloom technology.
Heatmap Illustration/Heirloom Carbon

It’s not a great time to be a direct air capture company in the U.S. During a year when the federal government stepped away from its climate commitments and cut incentives for climate tech and clean energy, investors largely backed away from capital-intensive projects with uncertain economics. And if there were ever an expensive technology without a clear path to profitability, it’s DAC.

But as the U.S. retrenches, Japanese corporations are leaning in. Heirloom’s $150 million Series B round late last year featured backing from Japan Airlines, as well as major Japanese conglomerates Mitsubishi Corporation and Mitsui & Co. Then this month, the startup received an additional infusion of cash from the Development Bank of Japan and the engineering company Chiyoda Corporation. Just days later, DAC project developer Deep Sky announced a strategic partnership with the large financial institution Sumitomo Mitsui Banking Corporation to help build out the country’s DAC market.

Keep reading...Show less