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Ask any climate wonk what’s holding back clean energy in the U.S. and you’re likely to get the same answer — not enough power lines. But what if the problem isn’t the number of power lines, but rather the outdated metal wires they’re made of?
Restringing transmission lines with more advanced wires, a process known as “reconductoring,” has the potential to double the amount of electricity our existing transmission system can handle, for less than half the price of building new lines. That’s the main finding of a recently published working paper from researchers at the University of California, Berkeley, and Gridlab, an energy consulting firm.
There are a few reasons that something as boring and seemingly ubiquitous as power lines are so crucial to the energy transition. Electrifying our cars and homes will increase demand for electricity, and much of the system is already too congested to integrate new wind and solar power plants. Plus, there just aren’t enough lines that run from the sunniest, windiest places to the places where most people actually live.
To realize the emission reduction potential of the clean energy subsidies in the Inflation Reduction Act, we have to more than double the rate of transmission expansion, according to research from Princeton University’s Repeat Project. Clean energy projects already face major delays and are often hit with exorbitant bills to connect to the grid. A study from Lawrence Berkeley National Laboratory called “Queued Up” found that at the end of 2022, there were more than 10,000 power plant and energy storage projects waiting for permission to connect to the grid — enough to double electricity production in the country. Some 95% of them were zero-carbon resources.
The main problem is permitting. Establishing rights-of-way for new power lines requires extensive environmental review and invites vicious local opposition. People don’t want to look at more wires strung across the landscape. They worry the eyesore will decrease their property value, or that the construction will hurt local ecosystems. New power lines often take upwards of 10 years to plan, permit, and build.
But it’s possible to avoid this time-consuming process, at least in many cases, by simply reconductoring lines along existing rights-of-way. Most of our existing power lines have a steel core surrounded by strands of aluminum. Advanced conductors replace the steel with a lighter but stronger core made of a composite material, such as carbon fiber. This subtle shift in materials and design enables the line to operate at higher temperatures, with less sag, significantly increasing the amount of power it can carry.
Advanced conductors cost two to four times more than conventional power lines — but upgrading an existing line to use advanced conductors can be less than half what a new power line would cost because it eliminates much of the construction spending and fees from permitting for new rights-of-way, the Berkeley study found.
“The most compelling, exciting thing is that it only requires a maintenance permit,” Duncan Callaway, an associate professor of energy and resources at Berkeley and one of the authors said while presenting the research over Zoom last week.
The paper highlights a 2016 project in southeastern Texas. Due to rapid population growth in the area, the local utility, American Electric Power, was seeing higher demand for electricity at peak times than it was prepared for, leading to blackouts. It needed to come up with a solution, fast, and decided that reconductoring 240 miles of its transmission lines would take less time than permitting new ones. The project ended up finishing ahead of schedule and under budget, at a cost of $900,000 per mile. By comparison, the 3,600 miles of new lines built under Texas’ Competitive Renewable Energy Zone program, which were built to connect wind-rich areas to population centers, cost more than double, at an average of $1.9 million per mile.
Callaway and his co-authors also plugged their findings into a power system expansion model — basically a computer program that maps out the most cost-effective mix of technologies to meet regional electric power demand. They fed the model a scenario where the only option for transmission was to build new lines at their slow, historical rate, as well as a scenario where there was also an option to reconductor along existing rights-of-way. The second scenario resulted in nearly four times as much transmission capacity by 2035, enabling the country to achieve a more than 90% clean electric grid by that date.
There are cases where new power lines are needed — for example, to establish a new route to access a high-quality renewable resource, Emilia Chojkiewicz, another author of the study, told me in an email. But she said it nearly always makes sense to consider reconductoring given the potential to double capacity and do so much more quickly. “Unfortunately,” she added, “current transmission planning practices do not tend to incentivize or even consider reconductoring.”
This all seems so ridiculously easy that it begs the question: Why aren’t utilities already rushing to do it? During the webinar last week, Chojkiewicz and her co-authors said part of the problem is just a lack of awareness and comfort with the technology. But the bigger issue is that utilities are not incentivized to look for cheaper, more efficient solutions like reconductoring because they profit off capital spending.
To change this, they suggested that the Federal Energy Regulatory Commission, which oversees interstate transmission, and state public service commissions, which regulate utilities at the state level, mandate the consideration of reconductoring in transmission and resource planning processes, and to properly value the benefits that advanced conductors provide. The Department of Energy could also consider instituting a national conductor efficiency standard, so that all new wires installed, whether along existing rights-of-way or new routes, achieve a minimum level of performance.
Reconductoring isn’t the only no-brainer alternative to building new power lines. Another study from the clean energy think tank RMI published last week illustrates the opportunity with even cheaper tweaks called “grid enhancing technologies.” One option is to install sensors that collect data on wind speed, temperature, and other factors that affect power lines in real time, called dynamic line ratings. These sensors allow utilities to safely increase the amount of power transmitted when weather conditions permit it. There are also power flow controls that can redirect power away from congested lines so that it can be transmitted elsewhere rather than wasted.
RMI found that in the PJM interconnection — a section of the grid in the eastern U.S. that is so congested the grid operator has frozen new applications to connect to it — these grid enhancing technologies could open up more than 6 gigawatts of new capacity to wind, solar, and storage projects in just three years. For reference, in 2022, nearly 300 gigawatts-worth of energy projects were waiting for permission to connect in PJM at the end 2022.
The cost savings are not just theoretical. In 2018, the PJM grid operator determined that a wind farm expansion in Illinois was going to require $100 million of grid upgrades — including building new lines and reconductoring existing ones — over a timeline of about three years before it would be able to connect. The developer countered that the needed upgrades could be achieved through power flow controls, which could be installed for a cost of just $12 million in less than half the time. PJM approved the idea, and the project is currently underway.
Congress is still debating how to reform permitting processes. But while that’s still a necessary step, it’s becoming increasingly clear that there’s a host of other outside-the-box solutions that can be deployed more quickly, in the near term. The IRA may have convinced the environmental movement that building new stuff was worth it, but there are still a lot of cases where the smarter choice is to renovate.
Editor’s note: This story has been updated to correct the cost of adding power flow controls to the PJM interconnection.
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Amarillo-area residents successfully beat back a $600 million project from Xcel Energy that would have provided useful tax revenue.
Power giant Xcel Energy just suffered a major public relations flap in the Texas Panhandle, scrubbing plans for a solar project amidst harsh backlash from local residents.
On Friday, Xcel Energy withdrew plans to build a $600 million solar project right outside of Rolling Hills, a small, relatively isolated residential neighborhood just north of the city of Amarillo, Texas. The project was part of several solar farms it had proposed to the Texas Public Utilities Commission to meet the load growth created by the state’s AI data center boom. As we’ve covered in The Fight, Texas should’ve been an easier place to do this, and there were few if any legal obstacles standing in the way of the project, dubbed Oneida 2. It was sited on private lands, and Texas counties lack the sort of authority to veto projects you’re used to seeing in, say, Ohio or California.
But a full-on revolt from homeowners and realtors apparently created a public relations crisis.
Mere weeks ago, shortly after word of the project made its way through the small community that is Rolling Hills, more than 60 complaints were filed to the Texas Public Utilities Commission in protest. When Xcel organized a public forum to try and educate the public about the project’s potential benefits, at least 150 residents turned out, overwhelmingly to oppose its construction. This led the Minnesota-based power company to say it would scrap the project entirely.
Xcel has tried to put a happy face on the situation. “We are grateful that so many people from the Rolling Hills neighborhood shared their concerns about this project because it gives us an opportunity to better serve our communities,” the company said in a statement to me. “Moving forward, we will ask for regulatory approval to build more generation sources to meet the needs of our growing economy, but we are taking the lessons from this project seriously.”
But what lessons, exactly, could Xcel have learned? What seems to have happened is that it simply tried to put a solar project in the wrong place, prizing convenience and proximity to an existing electrical grid over the risk of backlash in an area with a conservative, older population that is resistant to change.
Just ask John Coffee, one of the commissioners for Potter County, which includes Amarillo, Rolling Hills, and a lot of characteristically barren Texas landscape. As he told me over the phone this week, this solar farm would’ve been the first utility-scale project in the county. For years, he said, renewable energy developers have explored potentially building a project in the area. He’s entertained those conversations for two big reasons – the potential tax revenue benefits he’s seen elsewhere in Texas; and because ordinarily, a project like Oneida 2 would’ve been welcomed in any of the pockets of brush and plain where people don’t actually live.
“We’re struggling with tax rates and increases and stuff. In the proper location, it would be well-received,” he told me. “The issue is, it’s right next to a residential area.”
Indeed, Oneida 2 would’ve been smack dab up against Rolling Hills, occupying what project maps show would be the land surrounding the neighborhood’s southeast perimeter – truly the sort of encompassing adjacency that anti-solar advocates like to describe as a bogeyman.
Cotton also told me he wasn’t notified about the project’s existence until a few weeks ago, at the same time resident complaints began to reach a fever pitch. He recalled hearing from homeowners who were worried that they’d no longer be able to sell their properties. When I asked him if there was any data backing up the solar farm’s potential damage to home prices, he said he didn’t have hard numbers, but that the concerns he heard directly from the head of Amarillo’s Realtors Association should be evidence enough.
Many of the complaints against Oneida 2 were the sort of stuff we’re used to at The Fight, including fears of fires and stormwater runoff. But Cotton said it really boiled down to property values – and the likelihood that the solar farm would change the cultural fabric in Rolling Hills.
“This is a rural area. There are about 300 homes out there. Everybody sitting out there has half an acre, an acre, two acres, and they like to enjoy the quiet, look out their windows and doors, and see some distance,” he said.
Ironically, Cotton opposed the project on the urging of his constituents, but is now publicly asking Xcel to continue to develop solar in the county. “Hopefully they’ll look at other areas in Potter County,” he told me, adding that at least one resident has already come to him with potential properties the company could acquire. “We could really use the tax money from it. But you just can’t harm a community for tax dollars. That’s not what I’m about.”
I asked Xcel how all this happened and what their plans are next. A spokesperson repeatedly denied my requests to discuss Oneida 2 in any capacity. In a statement, the company told me it “will provide updates if the project is moved to another site,” and that “the company will continue to evaluate whether there is another location within Potter County, or elsewhere, to locate the solar project.”
Meanwhile, Amarillo may be about to welcome data center development because of course, and there’s speculation the first AI Stargate facility may be sited near Amarillo, as well.
City officials will decide in the coming weeks on whether to finalize a key water agreement with a 5,600-acre private “hypergrid” project from Fermi America, a new company cofounded by former Texas governor Rick Perry, says will provide upwards of 11 gigawatts to help fuel artificial intelligence services. Fermi claims that at least 1 gigawatt of power will be available by the end of next year – a lot of power.
The company promises that its “hypergrid” AI campus will use on-site gas and nuclear generation, as well as contracted gas and solar capacity. One thing’s for sure – it definitely won’t be benefiting from a large solar farm nearby anytime soon.
And more of the most important news about renewable projects fighting it out this week.
1. Racine County, Wisconsin – Microsoft is scrapping plans for a data center after fierce opposition from a host community in Wisconsin.
2. Rockingham County, Virginia – Another day, another chokepoint in Dominion Energy’s effort to build more solar energy to power surging load growth in the state, this time in the quaint town of Timberville.
3. Clark County, Ohio – This county is one step closer to its first utility-scale solar project, despite the local government restricting development of new projects.
4. Coles County, Illinois – Speaking of good news, this county reaffirmed the special use permit for Earthrise Energy’s Glacier Moraine solar project, rebuffing loud criticisms from surrounding households.
5. Lee County, Mississippi – It’s full steam ahead for the Jugfork solar project in Mississippi, a Competitive Power Ventures proposal that is expected to feed electricity to the Tennessee Valley Authority.
A conversation with Enchanted Rock’s Joel Yu.
This week’s chat was with Joel Yu, senior vice president for policy and external affairs at the data center micro-grid services company Enchanted Rock. Now, Enchanted Rock does work I usually don’t elevate in The Fight – gas-power tracking – but I wanted to talk to him about how conflicts over renewable energy are affecting his business, too. You see, when you talk to solar or wind developers about the potential downsides in this difficult economic environment, they’re willing to be candid … but only to a certain extent. As I expected, someone like Yu who is separated enough from the heartburn that is the Trump administration’s anti-renewables agenda was able to give me a sober truth: Land use and conflicts over siting are going to advantage fossil fuels in at least some cases.
The following conversation was lightly edited for clarity.
Help me understand where, from your perspective, the generation for new data centers is going to come from. I know there are gas turbine shortages, but also that solar and wind are dealing with headwinds in the United States given cuts to the Inflation Reduction Act.
There are a lot of stories out there about certain technologies coming out to the forefront to solve the problem, whether it’s gas generation or something else. But the scale and the scope of this stuff … I don’t think there is a silver bullet where it’s all going to come from one place.
The Energy Department put out a request for information looking for ways to get to 3 gigawatts quickly, but I don’t think there is any way to do that quickly in the United States. It’s going to take work from generation developers, batteries, thermal generation, emerging storage technologies, and transmission. Reality is, whether it is supply chain issues or technology readiness or the grid’s readiness to accept that load generation profile, none of it is ready. We need investment and innovation on all fronts.
How do conflicts over siting play into solving the data center power problem? Like, how much of the generation that we need for data center development is being held back by those fights?
I do have an intuitive sense that the local siting and permitting concerns around data centers are expanding in scope from the normal noise and water considerations to include impacts to energy affordability and reliability, as well as the selection of certain generation technologies. We’ve seen diesel generation, for example, come into the spotlight. It’s had to do with data center permitting in certain jurisdictions, in places like Maryland and Minnesota. Folks are realizing that a data center comes with a big power plant – their diesel generation. When other power sources fall short, they’ll rely on their diesel more frequently, so folks are raising red flags there. Then, with respect to gas turbines or large cycle units, there’s concerns about viewsheds, noise and cooling requirements, on top of water usage.
How many data center projects are getting their generation on-site versus through the grid today?
Very few are using on-site generation today. There’s a lot of talk about it and interest, but in order to serve our traditional cloud services data center or AI-type loads, they’re looking for really high availability rates. That’s really costly and really difficult to do if you’re off the grid and being serviced by on-site generation.
In the context of policy discussions, co-location has primarily meant baseload resources on sites that are serving the data centers 24/7 – the big stories behind Three Mile Island and the Susquehanna nuclear plant. But to be fair, most data centers operational today have on-site generation. That’s their diesel backup, what backstops the grid reliability.
I think where you’re seeing innovation is modular gas storage technologies and battery storage technologies that try to come in and take the space of the diesel generation that is the standard today, increasing the capability of data centers in terms of on-site power relative to status quo. Renewable power for data centers at scale – talking about hundreds of megawatts at a time – I think land is constraining.
If a data center is looking to scale up and play a balancing act of competing capacity versus land for energy production, the competing capacity is extremely valuable. They’re going to prioritize that first and pack as much as they can into whatever land they have to develop. Data centers trying to procure zero-carbon energy are primarily focused on getting that energy over wires. Grid connection, transmission service for large-scale renewables that can match the scale of natural gas, there’s still very strong demand to stay connected to the grid for reliability and sustainability.
Have you seen the state of conflict around renewable energy development impact data center development?
Not necessarily. There is an opportunity for data center development to coincide with renewable project development from a siting perspective, if they’re going to be co-located or near to each other in remote areas. For some of these multi-gigawatt data centers, the reason they’re out in the middle of nowhere is a combination of favorable permitting and siting conditions for thousands of acres of data center building, substations and transmission –
Sorry, but even for projects not siting generation, if megawatts – if not gigawatts – are held up from coming to the grid over local conflicts, do you think that’s going to impact data center development at all? The affordability conversions? The environmental ones?
Oh yeah, I think so. In the big picture, the concern is if you can integrate large loads reliably and affordably. Governors, state lawmakers are thinking about this, and it’s bubbling up to the federal level. You need a broad set of resources on the grid to provide that adequacy. To the extent you hold up any grid resources, renewable or otherwise, you’re going to be staring down some serious challenges in serving the load. Virginia’s a good example, where local groups have held up large-scale renewable projects in the state, and Dominion’s trying to build a gas peaker plant that’s being debated, too. But in the meantime, it is Data Center Alley, and there are gigawatts of data centers that continue to want to get in and get online as quickly as possible. But the resources to serve that load are not coming online in time.
The push toward co-location probably does favor thermal generation and battery storage technologies over straight renewable energy resources. But a battery can’t cover 24/7 use cases for a data center, and neither will our unit. We’re positioned to be a bridge resource for 24/7 use for a few years until they can get more power to the market, and then we can be a flexible backup resource – not a replacement for the large-scale and transmission-connected baseload power resources, like solar and wind. Texas has benefited from huge deployments of solar and wind. That has trickled down to lower electricity costs. Those resources can’t do it alone, and there’s thermal to balance the system, but you need it all to meet the load growth.