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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 But what if the problem isn’t the number of power lines, but rather the outdated metal wires they’re made of?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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A conversation with Mary King, a vice president handling venture strategy at Aligned Capital
Today’s conversation is with Mary King, a vice president handling venture strategy at Aligned Capital, which has invested in developers like Summit Ridge and Brightnight. I reached out to Mary as a part of the broader range of conversations I’ve had with industry professionals since it has become clear Republicans in Congress will be taking a chainsaw to the Inflation Reduction Act. I wanted to ask her about investment philosophies in this trying time and how the landscape for putting capital into renewable energy has shifted. But Mary’s quite open with her view: these technologies aren’t going anywhere.
The following conversation has been lightly edited and abridged for clarity.
How do you approach working in this field given all the macro uncertainties?
It’s a really fair question. One, macro uncertainties aside, when you look at the levelized cost of energy report Lazard releases it is clear that there are forms of clean energy that are by far the cheapest to deploy. There are all kinds of reasons to do decarbonizing projects that aren’t clean energy generation: storage, resiliency, energy efficiency – this is massively cost saving. Like, a lot of the methane industry [exists] because there’s value in not leaking methane. There’s all sorts of stuff you can do that you don’t need policy incentives for.
That said, the policy questions are unavoidable. You can’t really ignore them and I don’t want to say they don’t matter to the industry – they do. It’s just, my belief in this being an investable asset class and incredibly important from a humanity perspective is unwavering. That’s the perspective I’ve been taking. This maybe isn’t going to be the most fun market, investing in decarbonizing things, but the sense of purpose and the belief in the underlying drivers of the industry outweigh that.
With respect to clean energy development, and the investment class working in development, how have things changed since January and the introduction of these bills that would pare back the IRA?
Both investors and companies are worried. There’s a lot more political and policy engagement. We’re seeing a lot of firms and organizations getting involved. I think companies are really trying to find ways to structure around the incentives. Companies and developers, I think everybody is trying to – for lack of a better term – future-proof themselves against the worst eventuality.
One of the things I’ve been personally thinking about is that the way developers generally make money is, you have a financier that’s going to buy a project from them, and the financier is going to have a certain investment rate of return, or IRR. So ITC [investment tax credit] or no ITC, that IRR is going to be the same. And the developer captures the difference.
My guess – and I’m not incredibly confident yet – but I think the industry just focuses on being less ITC dependent. Finding the projects that are juicier regardless of the ITC.
The other thing is that as drafts come out for what we’re expecting to see, it’s gone from bad to terrible to a little bit better. We’ll see what else happens as we see other iterations.
How are you evaluating companies and projects differently today, compared to how you were maybe before it was clear the IRA would be targeted?
Let’s say that we’re looking at a project developer and they have a series of projects. Right now we’re thinking about a few things. First, what assets are these? It’s not all ITC and PTC. A lot of it is other credits. Going through and asking, how at risk are these credits? And then, once we know how at risk those credits are we apply it at a project level.
This also raises a question of whether you’re going to be able to find as many projects. Is there going to be as much demand if you’re not able to get to an IRR? Is the industry going to pay that?
What gives you optimism in this moment?
I’ll just look at the levelized cost of energy and looking at the unsubsidized tables say these are the projects that make sense and will still get built. Utility-scale solar? Really attractive. Some of these next-gen geothermal projects, I think those are going to be cost effective.
The other thing is that the cost of battery storage is just declining so rapidly and it’s continuing to decline. We are as a country expected to compare the current price of these technologies in perpetuity to the current price of oil and gas, which is challenging and where the technologies have not changed materially. So we’re not going to see the cost decline we’re going to see in renewables.
And more news around renewable energy conflicts.
1. Nantucket County, Massachusetts – The SouthCoast offshore wind project will be forced to abandon its existing power purchase agreements with Massachusetts and Rhode Island if the Trump administration’s wind permitting freeze continues, according to court filings submitted last week.
2. Tippacanoe County, Indiana – This county has now passed a full solar moratorium but is looking at grandfathering one large utility-scale project: RWE and Geenex’s Rainbow Trout solar farm.
3. Columbia County, Wisconsin – An Alliant wind farm named after this county is facing its own pushback as the developer begins the state permitting process and is seeking community buy-in through public info hearings.
4. Washington County, Arkansas – It turns out even mere exploration for a wind project out in this stretch of northwest Arkansas can get you in trouble with locals.
5. Wagoner County, Oklahoma – A large NextEra solar project has been blocked by county officials despite support from some Republican politicians in the Sooner state.
6. Skagit County, Washington – If you’re looking for a ray of developer sunshine on a cloudy day, look no further than this Washington State county that’s bucking opposition to a BESS facility.
7. Orange County, California – A progressive Democratic congressman is now opposing a large battery storage project in his district and talking about battery fire risks, the latest sign of a populist revolt in California against BESS facilities.
Permitting delays and missed deadlines are bedeviling solar developers and activist groups alike. What’s going on?
It’s no longer possible to say the Trump administration is moving solar projects along as one of the nation’s largest solar farms is being quietly delayed and even observers fighting the project aren’t sure why.
Months ago, it looked like Trump was going to start greenlighting large-scale solar with an emphasis out West. Agency spokespeople told me Trump’s 60-day pause on permitting solar projects had been lifted and then the Bureau of Land Management formally approved its first utility-scale project under this administration, Leeward Renewable Energy’s Elisabeth solar project in Arizona, and BLM also unveiled other solar projects it “reasonably” expected would be developed in the area surrounding Elisabeth.
But the biggest indicator of Trump’s thinking on solar out west was Esmeralda 7, a compilation of solar project proposals in western Nevada from NextEra, Invenergy, Arevia, ConnectGen, and other developers that would, if constructed, produce at least 6 gigawatts of power. My colleague Matthew Zeitlin was first to report that BLM officials updated the timetable for fully permitting the expansive project to say it would complete its environmental review by late April and be completely finished with the federal bureaucratic process by mid-July. BLM told Matthew that the final environmental impact statement – the official study completing the environmental review – would be published “in the coming days or week or so.”
More than two months later, it’s crickets from BLM on Esmeralda 7. BLM never released the study that its website as of today still says should’ve come out in late April. I asked BLM for comment on this and a spokesperson simply told me the agency “does not have any updates to share on this project at this time.”
This state of quiet stasis is not unique to Esmeralda; for example, Leeward has yet to receive a final environmental impact statement for its 700 mega-watt Copper Rays solar project in Nevada’s Pahrump Valley that BLM records state was to be published in early May. Earlier this month, BLM updated the project timeline for another Nevada solar project – EDF’s Bonanza – to say it would come out imminently, too, but nothing’s been released.
Delays happen in the federal government and timelines aren’t always met. But on its face, it is hard for stakeholders I speak with out in Nevada to take these months-long stutters as simply good faith bureaucratic hold-ups. And it’s even making work fighting solar for activists out in the desert much more confusing.
For Shaaron Netherton, executive director of the conservation group Friends of the Nevada Wilderness, these solar project permitting delays mean an uncertain future. Friends of the Nevada Wilderness is a volunteer group of ecology protection activists that is opposing Esmeralda 7 and filed its first lawsuit against Greenlink West, a transmission project that will connect the massive solar constellation to the energy grid. Netherton told me her group may sue against the approval of Esmeralda 7… but that the next phase of their battle against the project is a hazy unknown.
“It’s just kind of a black hole,” she told me of the Esmeralda 7 permitting process. “We will litigate Esmeralda 7 if we have to, and we were hoping that with this administration there would be a little bit of a pause. There may be. That’s still up in the air.”
I’d like to note that Netherton’s organization has different reasons for opposition than I normally write about in The Fight. Instead of concerns about property values or conspiracies about battery fires, her organization and a multitude of other desert ecosystem advocates are trying to avoid a future where large industries of any type harm or damage one of the nation’s most biodiverse and undeveloped areas.
This concern for nature has historically motivated environmental activism. But it’s also precisely the sort of advocacy that Trump officials have opposed tooth-and-nail, dating back to the president’s previous term, when advocates successfully opposed his rewrite of Endangered Species Act regulations. This reason – a motivation to hippie-punch, so to speak – is a reason why I hardly expect species protection to be enough of a concern to stop solar projects in their tracks under Trump, at least for now. There’s also the whole “energy dominance” thing, though Trump has been wishy-washy on adhering to that goal.
Patrick Donnelly, great basin director at the Center for Biological Diversity, agrees that this is a period of confusion but not necessarily an end to solar permitting on BLM land.
“[Solar] is moving a lot slower than it was six months ago, when it was coming at a breakneck pace,” said Patrick Donnelly of the Center for Biological Diversity. “How much of that is ideological versus 15-20% of the agencies taking early retirement and utter chaos inside the agencies? I’m not sure. But my feeling is it’s less ideological. I really don’t think Trump’s going to just start saying no to these energy projects.”