Getting more out of the grid we've already built

Clean-energy transmission lines in the US are horribly congested, and buildout of new ones is agonizingly slow. Yet while other parts of the world use grid-enhancing technologies (GETs) to significantly improve performance of existing transmission lines, the US system has been resistant to deploying them. In this episode, Julia Selker, head of a GETs trade group called the WATT Coalition, discusses the potential of GETs.

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David Roberts

One of the primary threats to the clean energy buildout spurred by the Inflation Reduction Act is a lack of transmission. Models show that hitting our Paris climate targets would involve building two to three times our current transmission capacity, yet new lines are desperately slow to come online. Meanwhile, existing lines are congested and hundreds of gigawatts of new clean energy sits waiting in interconnection queues.

Wouldn’t it be cool if there were some relatively cheap and speedy ways to get more capacity out of the transmission infrastructure we’ve already built? To ease some of that congestion and get more clean energy online while we wait for new lines to be completed?

As it happens, there are. They are called grid-enhancing technologies, or GETs, and they can improve the performance of existing transmission lines by as much as 40 percent.

It’s just that, in the US at least, utilities aren’t deploying them. They’ve been tested and deployed all over the world, but the US system has resisted using them at scale.

I contacted Julia Selker, head of the Working for Advanced Transmission Technologies (WATT) Coalition, a GETs trade group, to discuss exactly what these technologies are, their enormous potential to ease grid congestion, why utilities still resist them, and what kinds of policies can help move them along.

So with no further ado, Julia Selker. Welcome to Volts. Thank you so much for coming.

Julia Selker

Thank you so much for having me.

David Roberts

This is, to me, a very exciting topic that is like many exciting topics in the world of energy, somewhat obscured behind a wall of jargon and technical sounding terms. So we're going to do our best up front to decode some of this and lay it out in a simple way so people can grasp it. But before we get to GETs, before we get to the GETs, let's talk just a little bit about the need here, the need for more capacity on the transmission system. Run down a little bit, because I know you've done or have been involved in some research on grid congestion and things like that, give us a little rundown of why this topic is so important right now.

Julia Selker

Yeah, absolutely. The United States is basically desperate for transmission capacity and there are a few ways that we see that in data, and one is transmission congestion. So this is a quantification of the cost of a transmission constraint. So if you don't have enough transmission to deliver the cheapest electricity, you'll then have to turn on a thermal generator or something more expensive than a wind or solar generator, for instance, and that will increase costs for consumers. So back in the day, let's say 2016, the market monitors found $3.7 billion of congestion in the regional transmission organizations and the independent system operators that actually transparently report congestion data.

And if you scale that to the whole US, we're looking at about $6.5 billion in congestion in 2016. But in 2022, the national number wa