Wind energy decision carries political impact

By Washington Times


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With a tightlipped President Obama facing both a political dilemma and a critical deadline, the nations offshore wind energy industry is about to find out which way the breezes are blowing.

After nine years in the government regulatory mill, backers of the Cape Wind project off the shores of Massachusetts Cape Cod will learn by April 30 whether Mr. Obama and Interior Secretary Ken Salazar will let them proceed, with potentially farreaching consequences for the industry if the project is quashed.

Mark Rodgers, spokesman for Cape Wind developer Energy Management Inc. of Boston, said that the project is being closely watched because it is the first of its kind in the United States, with a number of other projects being eyed along the Atlantic coastline. Given the length of the regulatory approval process, it will likely be the only one built during the Obama administration.

If it doesnt get approved, it will have a big impact, said Mr. Rodgers.

Beyond being a setback for the industry, Mr. Rodgers said a rejection by the administration will be a real market signal.

Stakeholder investors will really be looking to see whats happening, he said.

Since taking office 16 months ago, Mr. Obama has made renewable energy a top priority — vowing to double the countrys output in three years, supporting wind turbines along the U.S. Outer Continental Shelf, and putting more than $800 million in the American Recovery and Reinvestment Act for such cleanenergy initiatives as solar and geothermal power.

In a move that pleased many conservative critics, the president last month gave his support to expanded offshore exploration and drilling for oil and natural gas. But Mr. Obama has yet to tip his hand on the pending Cape Wind project that would put 130 turbines in the Nantucket Sound within sight of the Cape Cod shoreline.

Cape Wind poses a particular dilemma for the administration. It was bitterly opposed by Mr. Obamas close friend and political mentor, the late Sen. Edward M. Kennedy, even though backers say the completed project could supply well more than half of the capes power needs.

White House spokesman Ben LaBolt declined to discuss Cape Winds place in the administrations renewable energy agenda, and referred questions to the office of Mr. Salazar, who had direct responsibility for approving the Cape Wind application.

Mr. Salazar has vowed to make a final decision by April 30, following a lengthy approval process marked by clashes over environmental issues and questions about the projects impact on historical and cultural landmarks. Two Cape Cod Wampanoag Indian tribes have objected to the project because, they say, it will destroy sacred rituals near the sound and disrupt underwater burial grounds.

Even putting aside the economic and ecological issues, the decision wont be an easy one for the president.

Massachusetts Gov. Deval Patrick, a Democrat and Obama ally, supports Cape Wind, even as Mr. Kennedy worked virtually right up to his death in 2009 to stop it.

The federal Advisory Council on Historic Preservation rejected the project April 2, citing Cape Winds destructive impact on the storied Kennedy family compound in Hyannisport and roughly 30 other historic districts and properties.

Sen. John Kerry, Massachusetts Democrat, has been publicly noncommittal, while newly elected Republican Sen. Scott Brown said he supports wind power in general but does not support Cape Wind.

The Nantucket Sound is a national treasure that should be protected from development, he said.

Mr. Kerry, who has a summer residence on Nantucket, has backed renewable energy efforts but has also raised concerns about Cape Wind, particularly the environmental impact of the 24squaremile project and the precedent it will set for future projects.

China and a number of European nations have been racing ahead with offshore wind energy projects as the U.S. debate has proceeded. There are at least six other major U.S. offshore wind projects in development including ones in the Northeast, the Great Lakes region and one off Texas Galveston coast that is not subject to federal review.

Advocates say the wind energy turbines could provide a new, affordable power source for Northeast states, which are already operating under mandates to have boost the percentage of their power generated from renewable sources. For example, the Delaware legislature approved standards requiring that 20 percent of the states electricity come from renewable sources by 2019.

Landbased wind farms have lower startup costs and present fewer technology and environmental challenges, which results in cheaper energy per megawatt hour. But the Northeastern U.S. in particular lacks sufficient space for major landbased developments.

Though other offshore wind projects are much further behind Cape Wind in the approval process, Princeton, N.J.based NRG Bluewater Wind has signed a 25year deal with Delmarva Power to sell the utility as much as 200 megawatts of power from an offshore wind facility off the Delaware coast.

While the industry will be watching closely the outcome of the Cape Wind process, NRG officials say, it will not be a makeorbreak moment for the offshore wind energy industry as a whole.

The wind industry is actually large and very broadbased, company President Peter Mandelstam said. Its much more than Cape Wind. All projects have forward momentum.

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Federal Government announces funding for Manitoba-Saskatchewan power line

Birtle Transmission Line connects Manitoba Hydro to SaskPower, enabling 215 MW of clean hydroelectricity, improving grid reliability, supporting affordable rates, and advancing Green Infrastructure goals under the Investing in Canada Plan across Manitoba and Saskatchewan.

 

Key Points

A 46 km line moving up to 215 MW from Manitoba Hydro to SaskPower, improving reliability and supplying cleaner power.

✅ Enables interprovincial grid tie between Manitoba and Saskatchewan

✅ Delivers up to 215 MW of renewable hydroelectricity

✅ Supports affordable rates and lower GHG emissions

 

The federal government announced funding for the Birtle Transmission Line Monday morning.

The project will help Manitoba Hydro build a transmission line from Birtle South Station in the Municipality of Prairie View to the Manitoba–Saskatchewan border 46 kilometres northwest. Once completed, the new line will allow up to 215 megawatts of hydroelectricity to flow from the Manitoba Hydro power grid to the SaskPower power grid, similar to the Great Northern Transmission Line connecting Manitoba and Minnesota today.

The government said the transmission line would create a more stable energy supply, keep energy rates affordable and help Saskatchewan's efforts to reduce cumulative greenhouse-gas emissions in that province.

"The Government of Canada is proud to be working with Manitoba to support projects that create jobs and improve people's lives across the province. The Birtle Transmission Line will provide the region with reliable and greener energy, as seen with Canadian hydropower to New York projects, that will help protect our environment while laying the groundwork for clean economic growth," said Jim Carr, member of Parliament for Winnipeg South Centre, on behalf of Catherine McKenna, minister of infrastructure and communities.

The Government of Canada is investing more than $18.7 million, and the government of Manitoba is contributing more than $42 million in this project through the Green Infrastructure Stream of the Investing in Canada Plan, which also supports Atlantic grid improvements nationwide.

"The Province of Manitoba has one of the cleanest electricity grids in Canada and the world with over 99 per cent of our electricity generated from clean, renewable sources, rooted in Manitoba's hydro history," said Central Services Minister Reg Helwer. "The Made-in-Manitoba Climate and Green Plan is good not only for Manitoba but for Canada and globally."

Jay Grewal, president, and CEO of Manitoba Hydro said the funding is a great example of co-operation between the provincial and federal governments, including investments in smart grid technology that modernize local networks.

"We are very pleased that Manitoba Hydro's Birtle Transmission Project is among the first projects to receive funding under the Canada Infrastructure Program, and we would like to thank both levels of governments for recognizing the importance of the project as we strengthen ties with our neighbours in Saskatchewan, as U.S.-Canada transmission approvals advance elsewhere," said Grewal.

A spokesperson for Manitoba Hydro said it’s too early to say how many jobs will be created during construction, as final contracts have not yet been awarded.

 

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Doug Ford ‘proud’ of decision to tear up hundreds of green energy contracts

Ontario Renewable Energy Cancellations highlight Doug Ford's move to scrap wind turbine contracts, citing electricity rate relief and taxpayer savings, while critics, the NDP, and industry warn of job losses, termination fees, and auditor scrutiny.

 

Key Points

Ontario's termination of renewable contracts, defended as cost and rate relief, faces disputes over savings and jobs.

✅ PCs cite electricity rate relief and taxpayer savings.

✅ Critics warn of job losses and termination fees.

✅ Auditor inquiry sought into contract cancellation costs.

 

Ontario Premier Doug Ford, whose new stance on wind power has drawn attention, said Thursday he is “proud” of his decision to tear up hundreds of renewable energy deals, a move that his government acknowledges could cost taxpayers more than $230 million.

Ford dismissed criticism that his Progressive Conservatives are wasting public money, telling a news conference that the cancellation of 750 contracts signed by the previous Liberal government will save cash, even as Ontario moves to reintroduce renewable energy projects in the coming years.

“I’m so proud of that,” Ford said of his decision. “I’m proud that we actually saved the taxpayers $790 million when we cancelled those terrible, terrible, terrible wind turbines that really for the last 15 years have destroyed our energy file.”

Later Thursday, Ford went further in defending the cancelled contracts, saying “if we had the chance to get rid of all the wind mills we would,” though a court ruling near Cornwall challenged such cancellations.

The NDP first reported the cost of the cancellations Tuesday, saying the $231 million figure was listed as “other transactions”, buried in government documents detailing spending in the 2018-2019 fiscal year.

The Progressive Conservatives have said the final cost of the cancellations, which include the decommissioning of a wind farm already under construction in Prince Edward County, Ont., has yet to be established, amid warnings about wind project cancellation costs from developers.

The government has said it tore up the deals because the province didn’t need the power and it was driving up electricity rates, and the decision will save millions over the life of the contracts. Industry officials have disputed those savings, saying the cancellations will just mean job losses for small business, and ignore wind power’s growing competitiveness in electricity markets.

NDP Leader Andrea Horwath has asked Ontario’s auditor general to investigate the contracts and their termination fees, amid debates over Ontario’s electricity future among leadership contenders. She called Ford’s remarks on Thursday “ridiculous.”

“Every jurisdiction around the world is trying to figure out how to bring more renewables onto their electricity grids,” she said. “This government is taking us backwards and costing us at the very least $231 million in tearing these energy contracts.”

At the federal level, a recent green electricity contract with an Edmonton company underscores that shift.

 

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Berlin Electric Utility Wins National Safety Award

Berlin Electric Utility APPA Safety Award recognizes Gold Designation performance in public power, highlighting OSHA-aligned incident rates, robust safety culture, worker safety training, and operational reliability that keeps the community's electric service resilient.

 

Key Points

A national honor for Berlin's Gold Designation recognizing safety performance, worker protection, and reliable service.

✅ Gold Designation in 15,000-29,999 worker hours APPA category

✅ OSHA-based incident rate and robust safety culture

✅ Training, PPE, and reliability focus in public power operations

 

The Town of Berlin Electric Utility Department has been recognized for its outstanding safety practices with the prestigious Safety Award of Excellence from the American Public Power Association (APPA), a distinction also reflected in Medicine Hat Electric Utility for health and safety excellence, highlighting industry-wide commitment to worker protection.

Recognition for Excellence

In an era when workplace safety is a critical concern, with organizations highlighting leadership in worker safety across the sector, the Town of Berlin Electric Utility Department’s achievement stands out. The department earned the Gold Designation award in the category for utilities with 15,000 to 29,999 worker hours of annual worker exposure. This category is part of the APPA’s annual Safety Awards, which are designed to recognize the safety performance of public power utilities across the United States.

Out of more than 200 utilities that participated in the 2024 Safety Awards, Berlin's Electric Utility Department distinguished itself with an exemplary safety record. The utility’s ranking was based on its low incidence of work-related injuries and illnesses, alongside its robust safety programs and strong safety culture.

What the Award Represents

The Safety Award of Excellence is given to utilities that demonstrate effective safety protocols and practices over the course of the year. The APPA evaluates utilities based on their incident rate, which is calculated using the number of work-related reportable injuries or illnesses relative to worker hours. This measurement adheres to guidelines established by the Occupational Safety and Health Administration (OSHA), ensuring a standardized approach to assessing safety.

For the Town of Berlin Electric Utility Department, achieving the Gold Designation award signifies a year of outstanding safety performance. The award reflects the department’s dedication to preventing accidents and creating a work environment where safety is prioritized at every level.

Why Safety Matters

For utilities like the one in Berlin, safety is not just about preventing injuries—it's about fostering a culture of care and responsibility. Electric utility workers face unique and significant risks, ranging from the dangers of working with high-voltage systems, including hazards near downed power lines that require extreme caution, to the physical demands of the job. A utility’s ability to minimize these risks and keep its workforce safe is a direct reflection of its safety practices, training, and overall management.

The commitment to safety extends beyond just the immediate work environment. Utilities that place a high value on safety typically invest in ongoing training, safety gear, and processes, and even contingency measures like staff living on site during outbreaks, that ensure all employees are well-prepared to handle the challenges of their roles. The Town of Berlin Electric Utility Department has taken these steps seriously, providing its workers with the resources they need to stay safe while maintaining the power supply for the local community.

The Importance of Worker Safety in Public Power

The American Public Power Association’s Safety Award program highlights the best practices in public utilities, which, as the U.S. grid overseer's pandemic warning reminded the sector, play a crucial role in providing essential services to communities across the country. Public power utilities, like Berlin’s, are governed by local or municipal entities rather than for-profit corporations, which often allows them to have a closer relationship with their communities. As a result, these utilities often go above and beyond when it comes to worker safety, understanding that the well-being of employees directly impacts the quality of service provided to residents.

For the Town of Berlin, this award not only highlights the utility's commitment to its employees but also reinforces the importance of the work that public utilities do in keeping communities safe and powered. Berlin's recognition underscores the significance of maintaining a safe work environment, especially when the safety of first responders and utility workers, as seen when nuclear plant workers raised concerns over virus precautions, directly impacts the public’s access to reliable services.

What’s Next for Berlin’s Electric Utility Department

Receiving the Safety Award of Excellence is a remarkable achievement, but for the Town of Berlin Electric Utility Department, it’s not the end of their safety journey—it’s just one more step in their ongoing commitment to improvement. The department’s leadership, including the safety team, has emphasized the importance of continually evaluating and enhancing safety protocols to stay ahead of potential risks. This includes adopting new safety technologies, refining training programs, and ensuring that all employees are involved in the process of safety.

As the Town of Berlin looks forward to the future, its focus on worker safety will remain a top priority. Maintaining this level of safety is not only crucial for the health and well-being of employees but also for ensuring the continued success of the community’s utility services.

Community Impact

This recognition also serves as an example for other utilities in the region and across the country. By prioritizing safety, the Town of Berlin Electric Utility Department sets a standard that other utilities can aspire to. In a time when worker safety is more important than ever, Berlin’s commitment to best practices provides a model for others to follow.

Ultimately, the safety of utility workers is a reflection of a community’s dedication to its workforce and its commitment to providing reliable, uninterrupted services. For the residents of Berlin, the recognition of their local electric utility department’s safety practices means that they can continue to rely on a safe, secure, and resilient power infrastructure, while staying mindful of home risks such as overheated power strips that can spark fires.

 

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Electricity exports to New York from Quebec will happen as early as 2025: Hydro-Quebec

Hertel-New York Interconnection delivers Hydro-Quebec renewable energy via a cross-border transmission line to New York City by 2025, supplying 1,250 MW through underground and underwater routes under a 25-year contract.

 

Key Points

A cross-border line delivering 1,250 MW of Hydro-Quebec hydropower to New York City via underground routes.

✅ 1,250 MW clean power to NYC by 2025

✅ 56.1 km underground, 1.6 km underwater in Quebec

✅ 25-year contract; Mohawk partnership revenue

 

Hydro-Quebec announced Thursday it has chosen the route for the Hertel-New York interconnection line, which will begin construction in the spring of 2023 in Quebec.

The project will deliver 1,250 megawatts of Quebec hydroelectricity to New York City starting in 2025, even as a recent electricity shortage report warns about rising demand at home.

It's a 25-year contract for Hydro-Quebec, the largest export contract for the province-owned company, and comes as hydrogen production investments gain traction in Eastern Canada.

The Crown corporation has not disclosed potential revenues from the project, but Premier François Legault mentioned on social media last September that a deal in principle worth more than $20 billion over 25 years was in the works.

The route includes a 56.1-kilometre underground and a 1.6-kilometre underwater section, similar to the Lake Erie Connector project planned under Lake Erie.

Eight municipalities in the Montérégie region will be affected: La Prairie, Saint-Philippe, Saint-Jacques-le-Mineur, Saint-Édouard, Saint-Patrice-de-Sherrington, Saint-Cyprien-de-Napierville, Saint-Bernard-de-Lacolle and Lacolle.

Across the country, new renewables such as wind projects in Yukon are receiving federal support, reflecting broader grid decarbonization.

The last part of the route will run along Fairbanks Creek to the Richelieu River, where it will connect with the American network.

Further south, there will be a 545-kilometre link between the Canada-U.S. border and New York City, while a separate Maine transmission approval advances a New England pathway for Quebec power.

Hydro-Quebec is holding two consultations on the project, on Dec. 8 in Lacolle and Dec. 9 in Saint-Jacques-le-Mineur.

Elsewhere in Atlantic Canada, EV-to-grid integration pilots are underway to test how vehicles can support the power system.

Once the route is in service, the Quebec line will be subject to a partnership between Hydro-Quebec and the Mohawk Council of Kahnawake, which will benefit from economic remunerations for 40 years.

To enhance reliability, grid-scale battery storage projects are also expanding in Ontario.

 

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How waves could power a clean energy future

Wave Energy Converters can deliver marine power to the grid, with DOE-backed PacWave enabling offshore testing, robust designs, and renewable electricity from oscillating waves to decarbonize coastal communities and replace diesel in remote regions.

 

Key Points

Wave energy converters are devices that transform waves' oscillatory motion into electricity for the grid or loads.

✅ DOE's PacWave enables full-scale, grid-connected offshore testing.

✅ Multiple designs convert oscillating motion into torque and power.

✅ Ideal for islands, microgrids, and replacing diesel generation.

 

Waves off the coast of the U.S. could generate 2.64 trillion kilowatt hours of electricity per year — that’s about 64% of last year’s total utility-scale electricity generation in the U.S. We won’t need that much, but one day experts do hope that wave energy will comprise about 10-20% of our electricity mix, alongside other marine energy technologies under development today.

“Wave power is really the last missing piece to help us to transition to 100% renewables, ” said Marcus Lehmann, co-founder and CEO of CalWave Power Technologies, one of a number of promising startups focused on building wave energy converters.

But while scientists have long understood the power of waves, it’s proven difficult to build machines that can harness that energy, due to the violent movement and corrosive nature of the ocean, combined with the complex motion of waves themselves, even as a recent wave and tidal market analysis highlights steady advances.

″Winds and currents, they go in one direction. It’s very easy to spin a turbine or a windmill when you’ve got linear movement. The waves really aren’t linear. They’re oscillating. And so we have to be able to turn this oscillatory energy into some sort of catchable form,” said Burke Hales, professor of cceanography at Oregon State University and chief scientist at PacWave, a Department of Energy-funded wave energy test site off the Oregon Coast. Currently under construction, PacWave is set to become the nation’s first full-scale, grid-connected test facility for these technologies, a milestone that parallels U.K. wind power lessons on scaling new industries, when it comes online in the next few years.

“PacWave really represents for us an opportunity to address one of the most critical barriers to enabling wave energy, and that’s getting devices into the open ocean,” said Jennifer Garson, Director of the Water Power Technologies Office at the U.S. Department of Energy.

At the beginning of the year, the DOE announced $25 million in funding for eight wave energy projects to test their technology at PacWave, as offshore wind forecasts underscore the growing investor interest in ocean-based energy. We spoke with a number of these companies, which all have different approaches to turning the oscillatory motion of the waves into electrical power.

Different approaches
Of the eight projects, Bay Area-based CalWave received the largest amount, $7.5 million. 

″The device we’re testing at PacWave will be a larger version of this,” said Lehmann. The x800, our megawatt-class system, produces enough power to power about 3,000 households.”

CalWave’s device operates completely below the surface of the water, and as waves rise and fall, surge forward and backward, and the water moves in a circular motion, the device moves too. Dampers inside the device slow down that motion and convert it into torque, which drives a generator to produce electricity, a principle mirrored in some wind energy kite systems as they harvest aerodynamic forces.

“And so the waves move the system up and down. And every time it moves down, we can generate power, and then the waves bring it back up. And so that oscillating motion, we can turn into electricity just like a wind turbine,” said Lehmann.

Another approach is being piloted by Seattle-based Oscilla Power, which was awarded $1.8 million from the DOE, and is getting ready to deploy its wave energy converter off the coast of Hawaii, at the U.S. Navy Wave Energy Test site.

Oscilla Power’s device is composed of two parts. One part floats on the surface and moves with the waves in all directions — up and down, side to side and rotationally. This float is connected to a large, ring-shaped structure which hangs below the surface, and is designed to stay relatively steady, much like how underwater kites leverage a stable reference to generate power. The difference in motion between the float and the ring generates force on the connecting lines, which is used to rotate a gearbox to drive a generator.

″The system that we’re deploying in Hawaii is what we call the Triton-C. This is a community-scale system,” said Balky Nair, CEO of Oscilla Power. “It’s about a third of the size of our flagship product. It’s designed to be 100 kilowatt rated, and it’s designed for islands and small communities.”

Nair is excited by wave energy’s potential to generate electricity in remote regions, which currently rely on expensive and polluting diesel imports to meet their energy needs when other renewables aren’t available, and similar tidal energy for remote communities efforts in Canada point to viable models. Before wave energy is adopted at-scale, many believe we’ll see wave energy replacing diesel generators in off-the-grid communities.

A third company, C-Power, based in Charlottesville, Virginia, was awarded more than $4 million to test its grid-scale wave energy converter at PacWave. But first, the company wants to commercialize its smaller scale system, the SeaRAY, which is designed for lower-power applications. 

″Think about sensors in the ocean, research, metocean data gathering, maybe it’s monitoring or inspection,” said C-Power CEO Reenst Lesemann on the initial applications of his device.

The SeaRAY consists of two floats and a central body, the nacelle, which contains the drivetrain. As waves pass by, the floats bob up and down, rotating about the nacelle and turning their own respective gearboxes which power the electric generators.

Eventually, C-Power plans to scale up its SeaRAY so that it’s capable of satellite communications and deep water deployments, before building a larger system, called the StingRAY, for terrestrial electricity generation.

Meanwhile, one Swedish company, Eco Wave Power, is taking another approach completely, eschewing offshore technologies in favor of simpler wave power devices that can be installed on breakwaters, piers, and jetties.

“All the expensive conversion machinery, instead of being inside the floaters like in the competing technologies, is on land just like a regular power station. So basically this enables a very low installation, operation, and maintenance cost,” explained CEO Inna Braverman.

 

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A tenth of all electricity is lost in the grid - superconducting cables can help

High-Temperature Superconducting Cables enable lossless, high-voltage, underground transmission for grid modernization, linking renewable energy to cities with liquid nitrogen cooling, boosting efficiency, cutting emissions, reducing land use, and improving resilience against disasters and extreme weather.

 

Key Points

Liquid-nitrogen-cooled power cables delivering electricity with near-zero losses, lower voltage, and greater resilience.

✅ Near-lossless transmission links renewables to cities efficiently

✅ Operate at lower voltage, reducing substation size and cost

✅ Underground, compact, and resilient to extreme weather events

 

For most of us, transmitting power is an invisible part of modern life. You flick the switch and the light goes on.

But the way we transport electricity is vital. For us to quit fossil fuels, we will need a better grid, with macrogrid planning connecting renewable energy in the regions with cities.

Electricity grids are big, complex systems. Building new high-voltage transmission lines often spurs backlash from communities, as seen in Hydro-Que9bec power line opposition over aesthetics and land use, worried about the visual impact of the towers. And our 20th century grid loses around 10% of the power generated as heat.

One solution? Use superconducting cables for key sections of the grid. A single 17-centimeter cable can carry the entire output of several nuclear plants. Cities and regions around the world have done this to cut emissions, increase efficiency, protect key infrastructure against disasters and run powerlines underground. As Australia prepares to modernize its grid, it should follow suit with smarter electricity infrastructure initiatives seen elsewhere. It's a once-in-a-generation opportunity.


What's wrong with our tried-and-true technology?
Plenty.

The main advantage of high voltage transmission lines is they're relatively cheap.

But cheap to build comes with hidden costs later. A survey of 140 countries found the electricity currently wasted in transmission accounts for a staggering half-billion tons of carbon dioxide—each year.

These unnecessary emissions are higher than the exhaust from all the world's trucks, or from all the methane burned off at oil rigs.

Inefficient power transmission also means countries have to build extra power plants to compensate for losses on the grid.

Labor has pledged A$20 billion to make the grid ready for clean energy, and international moves such as US-Canada cross-border approvals show the scale of ambition needed. This includes an extra 10,000 kilometers of transmission lines. But what type of lines? At present, the plans are for the conventional high voltage overhead cables you see dotting the countryside.

System planning by Australia's energy market operator shows many grid-modernizing projects will use last century's technologies, the conventional high voltage overhead cables, even as Europe's HVDC expansion gathers pace across its network. If these plans proceed without considering superconductors, it will be a huge missed opportunity.


How could superconducting cables help?
Superconduction is where electrons can flow without resistance or loss. Built into power cables, it holds out the promise of lossless electricity transfer, over both long and short distances. That's important, given Australia's remarkable wind and solar resources are often located far from energy users in the cities.

High voltage superconducting cables would allow us to deliver power with minimal losses from heat or electrical resistance and with footprints at least 100 times smaller than a conventional copper cable for the same power output.

And they are far more resilient to disasters and extreme weather, as they are located underground.

Even more important, a typical superconducting cable can deliver the same or greater power at a much lower voltage than a conventional transmission cable. That means the space needed for transformers and grid connections falls from the size of a large gym to only a double garage.

Bringing these technologies into our power grid offers social, environmental, commercial and efficiency dividends.

Unfortunately, while superconductors are commonplace in Australia's medical community (where they are routinely used in MRI machines and diagnostic instruments) they have not yet found their home in our power sector.

One reason is that superconductors must be cooled to work. But rapid progress in cryogenics means you no longer have to lower their temperature almost to absolute zero (-273℃). Modern "high temperature" superconductors only need to be cooled to -200℃, which can be done with liquid nitrogen—a cheap, readily available substance.

Overseas, however, they are proving themselves daily. Perhaps the most well-known example to date is in Germany's city of Essen. In 2014, engineers installed a 10 kilovolt (kV) superconducting cable in the dense city center. Even though it was only one kilometer long, it avoided the higher cost of building a third substation in an area where there was very limited space for infrastructure. Essen's cable is unobtrusive in a meter-wide easement and only 70cm below ground.

Superconducting cables can be laid underground with a minimal footprint and cost-effectively. They need vastly less land.

A conventional high voltage overhead cable requires an easement of about 130 meters wide, with pylons up to 80 meters high to allow for safety. By contrast, an underground superconducting cable would take up an easement of six meters wide, and up to 2 meters deep.

This has another benefit: overcoming community skepticism. At present, many locals are concerned about the vulnerability of high voltage overhead cables in bushfire-prone and environmentally sensitive regions, as well as the visual impact of the large towers and lines. Communities and farmers in some regions are vocally against plans for new 85-meter high towers and power lines running through or near their land.

Climate extremes, unprecedented windstorms, excessive rainfall and lightning strikes can disrupt power supply networks, as the Victorian town of Moorabool discovered in 2021.

What about cost? This is hard to pin down, as it depends on the scale, nature and complexity of the task. But consider this—the Essen cable cost around $20m in 2014. Replacing the six 500kV towers destroyed by windstorms near Moorabool in January 2020 cost $26 million.

While superconducting cables will cost more up front, you save by avoiding large easements, requiring fewer substations (as the power is at a lower voltage), and streamlining approvals.


Where would superconductors have most effect?
Queensland. The sunshine state is planning four new high-voltage transmission projects, to be built by the mid-2030s. The goal is to link clean energy production in the north of the state with the population centers of the south, similar to sending Canadian hydropower to New York to meet demand.

Right now, there are major congestion issues between southern and central Queensland, and subsea links like Scotland-England renewable corridors highlight how to move power at scale. Strategically locating superconducting cables here would be the best location, serving to future-proof infrastructure, reduce emissions and avoid power loss.

 

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