Biomass Plant to Tap Bull Market for Clean Energy

By San Diego Business Journal


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A $60 million project in southern San Diego County to build a 23-megawatt biomass power generation plant is on track to deliver electricity to San Diego Gas & Electric by late next year.

Amanda Martinez, president and chief executive officer of Bull Moose Energy LLC, the 2-year-old company building the plant, says construction is scheduled to begin in November and be complete by February of next year.

“We’ll go through seven months of testing and be in operation by December 2008,” said Martinez, who has four partners: Robert Traylor, Rock Swanson, Don Bunts and retired U.S. Navy Vice Adm. Joe Mobley.

The woman-owned company has four other bids in to get biomass power contracts; one other in California, and one each in Texas, Pennsylvania and Massachusetts. The company is funded through a combination of private, public and institutional equity.

Last June, SDG&E announced a 20-year contract to buy 20 megawatts of biomass electricity from Bull Moose beginning next year. The plant will use three megawatts of power to run itself. A megawatt can provide enough electricity to power about 650 homes.

State mandates on power from renewable resources are among the most aggressive in the country. California power companies are required to supply 20 percent of their customersÂ’ energy from renewable resources by 2010.

As a result, plants powered by biomass, wind, geothermal and solar are in big demand statewide.

“This moves us towards that goal,” said Peter Hidalgo, spokesman for SDG&E.

Gov. Arnold Schwarzenegger added another stipulation to the clean power rule. He signed an executive order requiring 20 percent of the renewable resource energy in the state to come from biomass operations.

In September 2005, SDG&E signed an agreement with Phoenix, Ariz.-based Stirling Energy Systems Inc. to provide 300 megawatts of solar power using solar dishes in the Imperial Valley. That project is ongoing, and has an option to expand to 900 megawatts.

In November, the utility signed up 120 megawatts worth of power production from other solar and geothermal providers.

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Why Canada's Energy Security Hinges on Renewables

Renewable Energy Security strengthens affordability and grid reliability through electrification, wind, and solar, reducing fossil fuel volatility exposed by the Ukraine crisis, aligning with IEA guidance and the Paris Agreement to deliver resilient, low-cost power.

 

Key Points

Renewable energy security is reliable, affordable power from electrification, wind and solar, cutting fossil fuel risk.

✅ Wind and solar now outcompete gas for new power capacity.

✅ Diversifies supply and reduces fossil price volatility.

✅ Requires grid flexibility, storage, and demand response.

 

Oil, gas, and coal have been the central pillar of the global energy system throughout the 20th century. And for decades, these fossil fuels have been closely associated with energy security.  

The perception of energy security, however, is rapidly changing. Renewables form an increasing share of energy sectors worldwide as countries look to deliver on the Paris Agreement and mitigate the effects of climate change, with IEA clean energy investment now significantly outpacing fossil fuels. Moreover, Russia’s invasion of Ukraine has demonstrated how relying on fossil fuels for power, heating, and transport has left many countries vulnerable or energy insecure.  

The International Energy Agency (IEA) defines energy security as “the uninterrupted availability of energy sources at an affordable price” (IEA, 2019a). This definition hardly describes today’s global energy situation, with the cancellation of natural gas deliveries and skyrocketing prices for oil and gas products, and with supply chain challenges in clean energy that also require attention. These circumstances have cascading effects on electricity prices in countries like the United Kingdom that rely heavily on natural gas to produce electricity. In Europe, energy insecurity has been even further amplified since the Russian corporation Gazprom recently cut off gas supplies to several countries.  

As a result, energy security has gained new urgency in Canada and worldwide, creating opportunities in the global electricity market for Canada. Recent events provide a stark reminder of the volatility and potential vulnerability of global fossil fuel markets and supply chains. Even in Canada, as one of the largest producers of oil and gas in the world, the price of fuels depends on global and regional market forces rather than government policy or market design. Thus, the average monthly price for gasoline in Canada hit a record high of CAD 2.07 per litre in May 2022 (Figure 1), and natural gas prices surged to a record CAD 7.54 per MMBtu in May 2022 (Figure 2).  

Energy price increases of this magnitude are more than enough to strain Canadian household budgets. But on top of that, oil and gas prices have accelerated inflation more broadly as it has become more expensive to produce, transport, and store goods, including food and other basic commodities (Global News, 2022).  

 

Renewable Energy Is More Affordable 

In contrast to oil and gas, renewable energy can reliably deliver affordable energy, as shown by falling wholesale electricity prices in markets with growing clean power. This is a unique and positive aspect of today’s energy crisis compared to historical crises: options for electrification and renewable-based electricity systems are both available and cost-effective.  

For new power capacity, wind and solar are now cheaper than any other source, and wind power is making gains as a competitive source in Canada. According to Equinor (2022), wind and solar were already cheaper than gas-based power in 2020. This means that renewable energy was already the cheaper option for new power before the recent natural gas price spikes. As illustrated in Figure 3, the cost of new renewable energy has dropped so dramatically that, for many countries, it is cheaper to install new solar or wind infrastructure than to keep operating existing fossil fuel-based power plants (International Renewable Energy Agency, 2021). This means that replacing fossil-based electricity generation with renewables would save money and reduce emissions. Wind and solar prices are expected to continue their downward trends as more countries increase deployment and learn how to best integrate these sources into the grid. 

 

Renewable Energy Is Reliable 

To deliver on the uninterrupted availability side of the energy security equation, renewable power must remain reliable even as more variable energy sources, like wind and solar, are added to the system, and regional leaders such as the Prairie provinces will help anchor this transition. For Canada and other countries to achieve high energy security through electrification, grid system operations must be able to support this, and pathways to zero-emissions electricity by 2035 are feasible.  

 

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Energy Security Support to Ukraine

U.S. Energy Aid to Ukraine delivers emergency electricity grid equipment, generators, transformers, and circuit breakers, supports ENTSO-E integration, strengthens energy security, and advances decarbonization to restore power and heat amid Russian attacks.

 

Key Points

U.S. funding and equipment stabilize Ukraine's power grid, strengthen energy security, and advance ENTSO-E integration.

✅ $53M for transformers, breakers, surge arresters, disconnectors

✅ $55M for generators and emergency heat to municipalities

✅ ENTSO-E integration, cybersecurity, nuclear safety support

 

In the midst of Russia’s continued brutal attacks against Ukraine’s energy infrastructure, Secretary of State Blinken announced today during a meeting of the G7+ on the margins of the NATO Ministerial in Bucharest that the United States government is providing over $53 million to support acquisition of critical electricity grid equipment. This equipment will be rapidly delivered to Ukraine on an emergency basis to help Ukrainians persevere through the winter, as the country prepares for winter amid energy challenges. This supply package will include distribution transformers, circuit breakers, surge arresters, disconnectors, vehicles and other key equipment.

This new assistance is in addition to $55 million in emergency energy sector support for generators and other equipment to help restore emergency power and heat to local municipalities impacted by Russia’s attacks on Ukraine’s power system, while both sides accuse each other of energy ceasefire violations that complicate repairs. We will continue to identify additional support with allies and partners, and we are also helping to devise long-term solutions for grid restoration and repair, along with our assistance for Ukraine’s effort to advance the energy transition and build an energy system decoupled from Russian energy.

Since Russia’s further invasion on February 24, working together with Congress, the Administration has provided nearly $32 billion in assistance to Ukraine, including $145 million to help repair, maintain, and strengthen Ukraine’s power sector in the face of continued attacks. We also have provided assistance in areas such as EU integration and regional electricity trade, including electricity imports to stabilize supply, natural gas sector support to maximize resource development, support for nuclear safety and security, and humanitarian relief efforts to help Ukrainians to overcome the impacts of energy shortages.

Since 2014, the United States has provided over $160 million in technical support to strengthen Ukraine’s energy security, including to strengthen EU interconnectivity, increase energy supply diversification, and promote investments in energy efficiency, renewable energy, and clean energy technologies and innovation.  Much of this support has helped prepare Ukraine for its eventual interconnection with Europe’s ENTSO-E electricity grid, aligning with plans to synchronize with ENTSO-E across the integrated power system, including the island mode test in February 2022 that not only demonstrated Ukraine’s progress in meeting the EU’s technical requirements, but also proved to be critical considering Russia’s subsequent military activity aimed at disrupting power supplies and distribution in Ukraine.

 

Department of Energy (DOE)

  • With the increased attacks on Ukraine’s electricity grid and energy infrastructure in October, DOE worked with the Ukrainian Ministry of Energy and DOE national laboratories to collate, vet, and help prioritize lists of emergency electricity equipment for grid repair and stabilization amid wider global energy instability affecting supply chains.
  • Engaged at the CEO level U.S. private sector and public utilities and equipment manufacturers to identify $35 million of available electricity grid equipment in the United States compatible with the Ukrainian system for emergency delivery. Identified $17.5 million to support purchase and transportation of this equipment.
  • With support from Congress, initiated work on full integration of Ukraine with ENTSO-E to support resumption of Ukrainian energy exports to other European countries in the region, including funding for energy infrastructure analysis, collection of satellite data and analysis for system mapping, and work on cyber security, drawing on the U.S. rural energy security program to inform best practices.
  • Initiated work on a new dynamic model of interdependent gas and power systems of Europe and Ukraine to advance identification and mitigation of critical vulnerabilities.
  • Delivered emergency diesel fuel and other critical materials needed for safe operation of Ukrainian nuclear power plants, as well as initiated the purchase of three truck-mounted emergency diesel backup generators to be delivered to improve plant safety in the event of the loss of offsite power.

U.S. Department of State

  • Building on eight years of technical engagement, the State Department continued to provide technical support to Naftogaz and UkrGasVydobuvannya to advance corporate governance reform, increase domestic gas production, provide strategic planning, and assess critical sub-surface and above-ground technical issues that impact the company’s core business functions.
  • The State Department is developing new programs focused on emissions abatement, decarbonization, and diversification, acknowledging the national security benefits of reducing reliance on fossil fuels to support Ukraine’s ambitious clean energy and climate goals and address the impacts of reduced supplies of natural gas from Russia.
  • The State Department led a decades-long U.S. government engagement to develop and expand natural gas reverse flow (west-to-east) routes to enhance European and Ukrainian energy security. Ukraine is now able to import natural gas from Europe, eliminating the need for Ukraine to purchase natural gas from Gazprom.

 

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Two new BC generating stations officially commissioned

BC Hydro Site C and Clean Energy Policy shapes B.C.'s power mix, affecting run-of-river hydro, net metering for rooftop solar, independent power producers, and surplus capacity forecasts tied to LNG Canada demand.

 

Key Points

BC Hydro's strategy centers on Site C, limiting new run-of-river projects and tightening net metering amid surplus power

✅ Site C adds long-term capacity with lower projected rates.

✅ Run-of-river IPP growth paused amid surplus forecasts.

✅ Net metering limits deter oversized rooftop solar.

 

Innergex Renewable Energy Inc. is celebrating the official commissioning today of what may be the last large run-of-river hydro project in B.C. for years to come.

The project – two new generating stations on the Upper Lillooet River and Boulder Creek in the Pemberton Valley – actually began producing power in 2017, but the official commissioning was delayed until Friday September 14.

Innergex, which earlier this year bought out Vancouver’s Alterra Power, invested $491 million in the two run-of-river hydro-electric projects, which have a generating capacity of 106 megawatts of power. The project has the generating capacity to power 39,000 homes.

The commissioning happened to coincide with an address by BC Hydro CEO Chris O’Riley to the Greater Vancouver Board of Trade Friday, in which he provided an update on the progress of the $10.7-billion Site C dam project.

That project has put an end, for the foreseeable future, of any major new run-of-river projects like the Innergex project in Pemberton.

BC Hydro expects the new dam to produce a surplus of power when it is commissioned in November 2024, so no new clean energy power calls are expected for years to come.

Independent power producers aren’t the only ones who have seen a decline in opportunities to make money in B.C. providing renewable power, as the Siwash Creek project shows. So will homeowners who over-build their own solar power systems, in an attempt to make money from power sales.

There are about 1,300 homeowners in B.C. with rooftop solar systems, and when they produce surplus power, they can sell it to BC Hydro.

BC Hydro is amending the net metering program to discourage homeowners from over-building. In some cases, some howeowners have been generating 40% to 50% more power than they need.

“We were getting installations that were massively over-sized for their load, and selling this big quantity of power to us,” O’Riley said. “And that was never the idea of the program.”

Going forward, BC Hydro plans to place limits on how much power a homeowner can sell to BC Hydro.

BC Hydro has been criticized for building Site C when the demand for power has been generally flat, and reliance on out-of-province electricity has drawn scrutiny. But O’Riley said the dam isn’t being built for today’s generation, but the next.

“We’re not building Site C for today,” he said. “We have an energy surplus for the short term. We’re not even building it for 2024. We’re building it for the next 100 years.”

O’Riley acknowledged Site C dam has been a contentious and “extremely challenging” project. It has faced numerous court challenges, a late-stage review by the BC Utilities Commission, cost overruns, geotechnical problems and a dispute with the main contractors.

In a separate case, the province was ordered to pay $10 million over the denial of a Squamish power project, highlighting broader legal risk.

But those issues have been resolved, O’Riley said, and the project is back on track with a new construction schedule.

“As we move forward, we have a responsibility to deliver a project on time and against the new revised budget, and I’m confident the changes we’ve made are set up to do that,” O’Riley said.

Currently, there are about 3,300 workers employed on the dam project.

Despite criticisms that BC Hydro is investing in a legacy mega-project at a time when cost of wind and solar have been falling, O’Riley insisted that Site C was the best and lowest cost option.

“First, it’s the lowest cost option,” he said. “We expect over the first 20 years of Site C’s operating life, our customers will see rates 7% to 10% below what it would otherwise be using the alternatives.”

BC Hydro missed a critical window to divert the Peace River, something that can only be done in September, during lower river flows. That added a full year’s delay to the project.

O’Riley said BC Hydro had built in a one-year contingency into the project, so he expects the project can still be completed by 2024 – the original in-service target date. But the delay will add more than $2 billion to the last budget estimate, boosting the estimated capital cost from $8.3 billion to $10.7 billion.

Meeting the 2024 in-service target date could be important, if Royal Dutch Shell and its consortium partners make a final investment decision this year on the $40 billion LNG Canada project.

That project also has a completion target date of 2024, and would be a major new industrial customer with a substantial power draw for operations.

“If they make a decision to go forward, they will be a very big customer of BC Hydro,” O’Riley told Business in Vancouver. “They would be in our top three or four biggest customers.”

 

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ABL Secures Contract for UK Subsea Power

ABL has secured a contract for the UK Subsea Power Link, highlighting ABL Group’s marine warranty role in Eastern Green Link 2, a 2 GW offshore electricity superhighway connecting Scotland and England to enhance grid reliability and renewable energy transmission.

 

Key Points: ABL Group’s contract for the UK Subsea Power Link

ABL Group has been appointed to provide marine warranty survey services for the 2 GW Eastern Green Link 2 subsea interconnector between Scotland and England.

✅ Manages vessel suitability checks, installation oversight, and DP assurance

✅ Strengthens UK grid reliability and advances the clean energy transition

✅ Sizeable contract valued between USD 1 million and 3 million

 

Energy and marine consultancy ABL, a subsidiary of ABL Group, has been awarded a contract by Eastern Green Link 2 (EGL2) to provide marine warranty survey (MWS) services for the installation of a new 2 GW subsea power connection between Scotland and England.

EGL2 is one of the United Kingdom’s most significant energy-infrastructure projects, involving the creation of a 505-kilometre “electricity superhighway” that will enable simultaneous power transfer between Peterhead in Aberdeenshire and Drax in North Yorkshire, mirroring a renewable power link announced for the same corridor recently. The project is designed to strengthen grid resilience, integrate renewable energy from Scotland’s offshore resources, and advance the UK’s broader energy transition goals.

Under the terms of the contract, ABL will be responsible for the technical review and approval of the project and procedural documentation, as well as conducting suitability surveys of the proposed fleet for marine transportation and installation operations. The company will also provide dynamic positioning (DP) assurance where required and will review and approve all warranted operations through on-site attendances, reflecting practices used on projects like the Great Northern Transmission Line in North America.

Cable-laying operations for the link are scheduled to take place between January and September 2028, amid wider efforts to fast-track grid connections across the UK. According to ABL, the engagement represents a “sizeable” contract, valued between USD 1 million and 3 million.

“This appointment reflects ABL's reputation as a trusted MWS partner for major power transmission infrastructure development and reinforces our position at the forefront of supporting the UK's energy transition,” said Hege Norheim, CEO of ABL Group. “We look forward to contributing to this strategic initiative.”

The subsea interconnector, known as Eastern Green Link 2, will transmit up to 2 gigawatts of electricity—enough to power approximately 2 million homes. It forms part of the Great Grid Upgrade, National Grid’s nationwide program to modernize and expand the transmission network in preparation for a low-carbon future, alongside a recent 2 GW substation milestone.

By linking renewable-rich northern Scotland with high-demand regions in England, EGL2 is expected to reduce congestion on the existing grid by leveraging HVDC technology to improve transfer efficiency, enhance security of supply, and facilitate the more efficient flow of surplus renewable energy south. The connection will also support the UK government’s target of decarbonizing the electricity system by 2035.

ABL’s appointment follows a period of intensive marine and geotechnical surveys along the proposed cable route to assess seabed conditions and environmental sensitivities. The company’s marine warranty oversight will ensure that transportation and installation operations meet strict safety, technical, and environmental standards demanded by insurers and project partners, as seen in a recent cross-border transmission approval in North America.

For ABL Group, which provides engineering and risk services to the offshore energy and marine industries worldwide, the contract marks another milestone in its expanding portfolio of subsea power and transmission projects across Europe. With operations set to begin in 2028, the Eastern Green Link 2 initiative represents both a major engineering challenge and a key enabler of the UK’s offshore energy ambitions, echoing a recent offshore wind power milestone in the U.S.

 

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Hydro One will keep running its U.S. coal plant indefinitely, it tells American regulators

Hydro One-Avista Merger outlines a utility acquisition shaped by Washington regulators, Colstrip coal plant depreciation, and plans for renewables, clean energy, and emissions cuts, while Montana reviews implications for jobs, ratepayers, and a 2027 closure.

 

Key Points

A utility deal setting Colstrip depreciation and renewables, without committing to an early coal plant closure.

✅ Washington sets 2027 depreciation for Colstrip units

✅ Montana reviews jobs, ratepayer impacts, community fund

✅ Avista seeks renewables; no binding shutdown commitment

 

The Washington power company Hydro One is buying will be ready to close its huge coal-fired generating station ahead of schedule, thanks to conditions put on the corporate merger by state regulators there.

Not that we actually plan to do that, the company is telling other regulators in Montana, where coal unit retirements are under debate, the huge coal-fired generating station in question employs hundreds of people. We’ll be in the coal business for a good long time yet.

Hydro One, in which the Ontario government now owns a big minority stake, is still working on its purchase of Avista, a private power utility based in Spokane. The $6.7-billion deal, which Hydro One announced in July, includes a 15 per cent share in two of the four generating units in a coal plant in Colstrip, Montana, one of the biggest in the western United States. Avista gets most of its electricity from hydro dams and gas but uses the Colstrip plant when demand for power is high and water levels at its dams are low.

#google#

Colstrip’s a town of fewer than 2,500 people whose industries are the power plant and the open-pit mines that feed it about 10 million tonnes of coal a year. Two of Colstrip’s generators, older ones Avista doesn’t have any stake in, are closing in 2022. The other two will be all that keep the town in business.

In Washington, they don’t like the coal plant and its pollution. In Montana, the future of Colstrip is a much bigger concern. The companies have to satisfy regulators in both places that letting Hydro One buy Avista is in the public interest.

Ontario proudly closed the last of our coal plants in 2014 and outlawed new ones as environmental menaces, and Alberta's coal phase-out is now slated to finish by 2023. When Hydro One said it was buying Avista, which makes about $100 million in profit a year, Premier Kathleen Wynne said she hoped Ontario’s “value system” would spread to Avista’s operations.

The settlement is “an important step towards bringing together two historic companies,” Hydro One’s chief executive Mayo Schmidt said in announcing it.

The deal has approval from the Washington Utilities and Transportation Commission staff but is subject to a vote by the group’s three commissioners. It doesn’t commit Avista to closing anything at Colstrip or selling its share. But Avista and Hydro One will budget as if the Colstrip coal burners will close in 2027, instead of running into the 2040s as their owners had once planned, a timeline that echoes debates over the San Juan Generating Station in New Mexico.

In accounting terms, they’ll depreciate the value of their share of the plant to zero over the next nine years, reflecting what they say is the end of the plant’s “useful life.” Another of Colstrip’s owners, Puget Sound Energy, has previously agreed with Washington regulators that it’ll budget for a Colstrip closure in 2027 as well.

Avista and Hydro One will look for sources of 50 megawatts of renewable electricity, including independent power projects where feasible, in the next four years and another 90 megawatts to supplement Avista’s supply once the Colstrip plant eventually closes, they promise in Washington. They’ll put $3 million into a “community transition fund” for Colstrip.

The money will come from the companies’ profits and cash, the agreement says. “Hydro One will not seek cost recovery for such funds from ratepayers in Ontario,” it says specifically.

“Ontario has always been a global leader in the transition away from dirty coal power and towards clean energy,” said Doug Howell, an anti-coal campaigner with the Sierra Club, which is a party to the agreement. “This settlement continues that tradition, paving the way for the closure of the largest single source of climate pollution in the American West by 2027, if not earlier.”

Montanans aren’t as thrilled. That state has its own public services commission, doing its own examination of the corporate merger, which has asked Hydro One and Avista to explain in detail why they want to write off the value of the Colstrip burners early. The City of Colstrip has filed a petition saying it wants in on Montana hearings because “the potential closure of (Avista’s units) would be devastating to our community.”

Don’t get too worked up, an Avista vice-president urged the Montana commission just before Easter.

“Just because an asset is depreciated does not mean that one would otherwise remove that asset from service if the asset is still performing as intended,” Jason Thackston testified in a session that dealt only with what the deal with Washington state would mean to Colstrip. We’re talking strictly about an accounting manoeuvre, not an operational commitment.

Six joint owners will have to agree to close the Colstrip generators and there’s “no other tacit understanding or unstated agreement” to do that, he said.

Besides Washington and Montana, state regulators in Idaho, including those overseeing the Idaho Power settlement process, Alaska and Oregon and multiple federal authorities have to sign off on the deal before it can happen. Hydro One hopes it’ll be done in the second half of this year.

 

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UK must start construction of large-scale storage or fail to meet net zero targets.

UK Hydrogen Storage Caverns enable long-duration, low-carbon electricity balancing, storing surplus wind and solar power as green hydrogen in salt formations to enhance grid reliability, energy security, and net zero resilience by 2035 and 2050.

 

Key Points

They are salt caverns storing green hydrogen to balance wind and solar, stabilizing a low-carbon UK grid.

✅ Stores surplus wind and solar as green hydrogen in salt caverns

✅ Enables long-duration, low-carbon grid balancing and security

✅ Complements wind and solar; reduces dependence on flexible CCS

 

The U.K. government must kick-start the construction of large-scale hydrogen storage facilities if it is to meet its pledge that all electricity will come from low-carbon electricity sources by 2035 and reach legally binding net zero targets by 2050, according to a report by the Royal Society.

The report, "Large-scale electricity storage," published Sep. 8, examines a wide variety of ways to store surplus wind and solar generated electricity—including green hydrogen, advanced compressed air energy storage (ACAES), ammonia, and heat—which will be needed when Great Britain's electricity generation is dominated by volatile wind and solar power.

It concludes that large scale electricity storage is essential to mitigate variations in wind and sunshine, particularly long-term variations in the wind, and to keep the nation's lights on. Storing most of the surplus as hydrogen, in salt caverns, would be the cheapest way of doing this.

The report, based on 37 years of weather data, finds that in 2050 up to 100 Terawatt-hours (TWh) of storage will be needed, which would have to be capable of meeting around a quarter of the U.K.'s current annual electricity demand. This would be equivalent to more than 5,000 Dinorwig pumped hydroelectric dams. Storage on this scale, which would require up to 90 clusters of 10 caverns, is not possible with batteries or pumped hydro.

Storage requirements on this scale are not currently foreseen by the government, and the U.K.'s energy transition faces supply delays. Work on constructing these caverns should begin immediately if the government is to have any chance of meeting its net zero targets, the report states.

Sir Chris Llewellyn Smith FRS, lead author of the report, said, "The need for long-term storage has been seriously underestimated. Demand for electricity is expected to double by 2050 with the electrification of heat, transport, and industrial processing, as well as increases in the use of air conditioning, economic growth, and changes in population.

"It will mainly be met by wind and solar generation. They are the cheapest forms of low-carbon electricity generation, but are volatile—wind varies on a decadal timescale, so will have to be complemented by large scale supply from energy storage or other sources."

The only other large-scale low-carbon sources are nuclear power, gas with carbon capture and storage (CCS), and bioenergy without or with CCS (BECCS). While nuclear and gas with CCS are expected to play a role, they are expensive, especially if operated flexibly.

Sir Peter Bruce, vice president of the Royal Society, said, "Ensuring our future electricity supply remains reliable and resilient will be crucial for our future prosperity and well-being. An electricity system with significant wind and solar generation is likely to offer the lowest cost electricity but it is essential to have large-scale energy stores that can be accessed quickly to ensure Great Britain's energy security and sovereignty."

Combining hydrogen with ACAES, or other forms of storage that are more efficient than hydrogen, could lower the average cost of electricity overall, and would lower the required level of wind power and solar supply.

There are currently three hydrogen storage caverns in the U.K., which have been in use since 1972, and the British Geological Survey has identified the geology for ample storage capacity in Cheshire, Wessex and East Yorkshire. Appropriate, novel business models and market structures will be needed to encourage construction of the large number of additional caverns that will be needed, the report says.

Sir Chris observes that, although nuclear, hydro and other sources are likely to play a role, Britain could in principle be powered solely by wind power and solar, supported by hydrogen, and some small-scale storage provided, for example, by batteries, that can respond rapidly and to stabilize the grid. While the cost of electricity would be higher than in the last decade, we anticipate it would be much lower than in 2022, he adds.

 

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