Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror
×
Power United States

A Simple Fix Could Double the Size of the U.S. Electricity Grid (msn.com) 202

"There is one big thing holding the United States back from a pollution-free electricity grid running on wind, solar and battery power," writes the Washington Post. "Not enough power lines... the nation's sagging, out-of-date power lines are being overwhelmed — slowing the transition to clean energy and the fight against climate change." But experts say that there is a remarkably simple fix: installing new wires on the high-voltage lines that already carry power hundreds of miles across the United States. Just upgrading those wires, new reports show, could double the amount of power that can flow through America's electricity grid...

Most of America's lines are wired with a technology that has been around since the early 1900s — a core steel wire surrounded by strands of aluminum. When those old wires heat up — whether from power passing through them or warm outdoor temperatures — they sag. Too much sag in a transmission line can be dangerous, causing fires or outages. As a result, grid operators have to be careful not to allow too much power through the lines. But a couple of decades ago, engineers designed a new type of wire: a core made of carbon fiber, surrounded by trapezoidal pieces of aluminum. Those new, carbon-fiber wires don't sag as much in the heat. That means that they can take up to double the amount of power as the old lines. According to the recent study from researchers at UC-Berkeley and GridLab, replacing these older steel wires could provide up to 80 percent of the new transmission needed on the electricity grid — without building anything new. It could also cost half as much as building an entirely new line and avoid the headaches of trying to get every state, city and even landowner along the route to agree to a new project...

If stringing new lines is so easy — and cheap — why hasn't it been done already? Part of the problem, experts say, is that utilities profit more from big infrastructure projects. Routine maintenance or larger-scale upgrades of the electricity grid don't help utilities make a lot of cash compared with building new transmission lines... Duncan Callaway, a professor of energy and resources at UC-Berkeley and one of the authors of the recent study, said that many transmission engineers are not used to thinking of rewiring as one of their tools. "But it's a much faster way," he said. Some changes are already underway to encourage this approach. For a long time, utilities had to undergo lengthy environmental reviews if they were rewiring a line longer than 20 miles. Earlier this month, the Federal Energy Regulatory Commission announced that those would no longer be necessary if utilities are simply replacing wires.

This discussion has been archived. No new comments can be posted.

A Simple Fix Could Double the Size of the U.S. Electricity Grid

Comments Filter:
  • Great Plan (Score:3, Insightful)

    by The Cat ( 19816 ) on Sunday June 02, 2024 @11:47AM (#64517687)

    Everything must be manufactured in the United States using raw materials in the United States by gainfully employed and generously paid Americans.

    If the plan is to stuff China's pockets, fuck off.

    • I can agree with that and with an addendum that if we currently lack the manufacturing capacity to do this we should be kickstarting that as well.

      The incentive for a private contractor is to use the cheapest materials they are allowed to, which is fair, so we pass a law that says domestic only and the capacity doesn't exist we can't just shrug and hope it appears, plus that's the type of thing that creates long term jobs.

    • Everything must be manufactured in the United States using raw materials in the United States

      Unless you have a magic wand that can make bauxite reserves pop into existence, that ain't gonna happen.

      • by Luckyo ( 1726890 )

        Bauxite reserves aren't the bottleneck in new aluminium smelting. Power prices are.

        The reason why former Soviet states do so much of it is because they used to have a massive amount of heavy industry during USSR era, that died almost overnight. Leaving a lot of capacity. So they put it into smelting.

        Chinese do it because they basically have a massive resource transfer scheme from households to everything industrial. It's how they have massive industrial overcapacity coupled with fairly poor general populati

  • Marketing (Score:5, Informative)

    by sunderland56 ( 621843 ) on Sunday June 02, 2024 @11:47AM (#64517689)

    Sounds like the marketing boffins for the carbon-fibre-wire industry are out in full force.

  • I kinda always expected cable replacement to be a main part of the project anyway.

    Also this is a good example of simple not being the same as easy.

  • Regulation (Score:4, Interesting)

    by mesterha ( 110796 ) <chris@mesterharm.gmail@com> on Sunday June 02, 2024 @11:53AM (#64517703) Homepage
    This is a intrinsic problem with regulating private natural monopolies. They often are only allowed a fixed percentage profit which incentives then to spend as much as possible. The obvious answer is to make natural monopolies public, but the politicians already sold us out.
    • Energy companies already have to allow other providers to sell over the same grid. Why is it we let them keep the grid? They "own" it in one sense, but only through subscriber fees that pay for everything same as taxpayer funded would. The government shouldn't have to pay a dime to take it over on behalf of taxpayers.

    • by dfghjk ( 711126 )

      "...but the politicians already sold us out."

      No, that's just scapegoating. Our politicians are merely a reflection of our own laziness and willingness to tolerate corruption.

      But yes otherwise. There is a role for government to play. We should expect better. As long as we tolerate bad government and voter suppression we won't get it.

      • It's a weird thing that almost nobody has an issue with municipal water and sewer systems but power and Internet done that way is contentious?

        • Not sure it is all that helpful. Austin has its own power company. Rates are similar to public, The city skims around 10% of the revenue for profit back to the GA account. And until the double icings (2021/2023) the city got very lax about tree trimming. As one line guy told me replacing a fuse that had been fried by iced trees for my loop, "you see those parks & rec's trucks around town, we paid for them". He also had trouble getting his fuse replacement pole thru all the foliage it was so overgrown ar
    • This is a intrinsic problem with regulating private natural monopolies. They often are only allowed a fixed percentage profit which incentives then to spend as much as possible. The obvious answer is to make natural monopolies public, but the politicians already sold us out.

      Then perhaps the obvious answer is to get rid of the politicians. While we still have a mechanism to do so.

      When it comes to the power infrastructure of a nation, we also shouldn’t tolerate complaints about “profits” when every company currently profiting selling overpriced power on purposely crippled grids screams for taxpayer-funded emergency federal funding when the first major blackout happens, as a direct cause of a purposely crippled grid.

      Greedy actions like this is what drives cont

    • This is a intrinsic problem with regulating private natural monopolies. They often are only allowed a fixed percentage profit which incentives then to spend as much as possible. The obvious answer is to make natural monopolies public, but the politicians already sold us out.

      Generation and distribution are NOT natural monopolies. A city can (and must) be feeed with more than one transmission line (for redundancy reasons), and big cities require more than one generation plant or hydro (both for redundancy and also for sheer demand) .

      The natural monopoly part is distribution.

      And since this article was about transmission, well...

  • Pick me! Pick me! (Score:5, Insightful)

    by PsychoSlashDot ( 207849 ) on Sunday June 02, 2024 @12:15PM (#64517755)
    There is one big thing holding the United States back from a pollution-free electricity grid running on wind, solar and battery power," writes the Washington Post.

    Can I guess?

    Is it... that there isn't enough pollution-free electricity-generation to saturate the current (pun intended) grid?
    Okay, okay, is it... that the transformers and other assorted gear at each end of the wires in the current grid are designed for the wires that are in place?
    Okay, uh, is it... that the grid as it stands was designed for centralized base-load generation, not wind and solar distributed all over the places?

    Damn. I feel like I just don't understand the topic because I don't come up with the same answer to "one trick the casinos hate but can't stop you from using" that the wire sales industry came up with.
    • Clickbait has polluted all media. My particular gripe is titling stories in the following way:

      Life Used to be Horrible. Now This Man Has All the Answers. periods included. Even WSJ writes this way now.
    • by Luckyo ( 1726890 )

      The problem is that both of the fetishized green power sources are intermittent and very low energy density. So one of the potential "maybe" hail mary solutions is the one currently being experimented with in EU. What if we interconnect everyone into one massive grid, and just hope that it's windy and sunny somewhere, and we have enough wind and solar there so their intermittencies cancel each other out.

      Spoiler alert: it failed. How do I know? I am on spot pricing contract (spot price + margin of my electri

    • I'd argue that the problem is that the grid operators' purpose appears to be making money rather than producing and delivering electricity.

      If your goal is to make money, and you happen to do it by generating and delivering electricity, of course this happens.

      If, on the other hand, the goal is to generate and deliver electricity, then you don't run into this "we don't make a high enough profit margin" situation. The trouble is that companies - and even public ones - often only count the monetary profit as w

    • Right, that list, plus:

      Power demand is ever increasing, and all of these "one weird trick" plans are aimed at finding the minimum that can be done to raise transmission capacity a little, when what we really need is a plan to step up capacity by an order of magnitude.

      Forget megawatts and gigawatts, I really want someone to tell me what the plan is to get to cheap and reliable Terawatt class power generation and delivery by the time we will need it.
    • The point of the article was making is that the extremely outdated, beat up and low quality infrastructure we use to deliver power is going to make it difficult if not impossible to switch to renewables. As others have pointed out the article is making the point that vast amounts of electricity is lost transporting power that doesn't need to be lost and that if we just spent the money we need to spend upgrading the power lines we could pretty quickly get to 100% renewables.
  • China’s State Grid Corp Crushes Power Transmission Records

    The new 1100-kv UHVDC line absorbs the grid’s alternating current at an AC/DC converter station near the capitol of Xinjiang—China's vast northwestern territory—and sends DC power to a second converter station in Anhui province in eastern China. That 3,293 kilometer run extends power transmission’s distance record by over 900 kms.

    https://spectrum.ieee.org/chin... [ieee.org]
    Why is China Dominating Ultra High Voltage DC https://www [youtube.com]

    • by hazem ( 472289 )

      Is that very different than the system that uses HVDC to transfer power from the dams on the Columbia to California? I remember visiting this station in the 80s: https://en.wikipedia.org/wiki/... [wikipedia.org]

    • Why is DC better?
      It has to do with AC RMS voltage versus Peak voltage. The RMS voltage which stands for the Root Mean Square of voltage on the line can be used directly to calculate the power you transferred. Vrms x Current. 1000 Vrms at 100 Amps gives you 100,000 Watts. However the Peak voltage on that circuit is 14100 Volts. You need to build it with sufficient separation/insulation for 14100 Volts Even though you only get power equivalent to 10000 Volts. Now if you take those same wires that you ran

      • by HiThere ( 15173 )

        DC isn't always better. IIRC, there's a problem with multi-terminal lines that AC handles a lot more smoothly than DC. AC also works with transformers. I don't know how DC does voltage/current swaps.

  • To replace them costs money and is hard to do because it interrupts service. The power companies will put people on helicopters to change out insulators or clean lines just to keep the lines lines. I'm sure replacing the cables is now inconvenient
  • This has the feel of a marketing pitch for a their new product complete with a suggested policy change that will guarantee a healthy profit to their customers.
  • by RockDoctor ( 15477 ) on Sunday June 02, 2024 @03:27PM (#64518163) Journal

    Those new, carbon-fiber wires don't sag as much in the heat. That means that they can take up to double the amount of power as the old lines.

    Which is great. But the transformers and switchgear at each end of the line won't be able to handle the extra power. So they will need changing. Which will occupy a greater footprint on the ground (and/ or vertical space, to maintain arcing distances between insulator stacks, etc). So for a lot of ground installations, you'll need more ground space - or to stack the equipment higher, then jack up the first couple of transmission towers ...

    It's a system. This is one link in the system. It's going to be difficult to upgrade the system. Not impossible - but harder than it sounds.

  • If "doubling the size of the grid" were really so easy, it would have been done already.

  • Wait âtil they find out about high voltage DC power. Conventional transmission lines come in groups of three. With only 50% more wires than the two wires of the single-phase power that gets to most homes, three-phase transmission delivers almost twice as much power. Then HVDC comes along and can put the full power on each of the three wires, tripling the capacity. But it has its own problems, famously that DC doesnâ(TM)t generate the fluctuating magnetic fields that make transformers possible.
  • To get concrete proof that it is this easy?
  • Currently most Transmissiobn Lines go @ 750KVolts. Last century the USSR constructed a 1MVolt AC Line, and the current state of the art is 1MVolt DC lines.

    I wander if pushing the current lines from 750KVolts to 1MVolt will help even more.

    Yes, it will be more complex than just changing the cables, as not only the cables can/will be changed, but also because the pylons have to be reconstructed, and the transforemes have to be changed (and in the case of DC, the inverters have to be added), but, in a strained

  • The problem is the public utility regulators. They are by a wide margin the dumbest organizations on the planet. It is hard to grasp just how stupid a system we have inherited.
    *The utilities are local monopolists
    *they are guaranteed a fixed return on capital investment (so when Southern California Edison Electric was in bankruptcy protection the stock price didn't fall)
    *the public utility regulator sets the price of electricity so that in the long run the utility will make their profit
    *the regulat
  • Change the wires, they get to carry twice the electricity. Is there that generation capacity? Assuming there is, has thought been given to what the transmission lines connect to? Are they up to handling twice the electricity?
  • No thanks!
    I'm waiting for the fiber optic power lines so I can get my power faster!

There is no opinion so absurd that some philosopher will not express it. -- Marcus Tullius Cicero, "Ad familiares"

Working...