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China Compressed-Air Energy Storage enables grid flexibility using salt caverns in Jiangsu, delivering long-duration storage for wind and solar, 60 MW capacity, dispatchable power, and low-cost, safe, round-the-clock clean energy integration.

Key Points

Stores off-peak power by compressing air in salt caverns, then drives turbines on demand to balance renewables.

✅ 60 MW Jintan plant connects to grid; commercial CAES milestone

✅ Uses salt caverns; low-cost long-duration storage; high safety

✅ Balances wind and solar; improves grid flexibility and reliability

China is set to connect its first commercial compressed-air energy storage plant to the grid as it seeks more ways to harness fast-growing clean power resources, including new hydropower alongside other long-duration options such as gravity power technologies for around-the-clock use.

China Huaneng Group Co. said its Jiangsu Jintan Salt Cave project recently underwent four days of successful trials and is now ready for commercial operations. The 60-megawatt plant will be the largest compressed air energy storage plant built anywhere in the world since 1991, and the first in China outside of small-scale technology demonstration projects, as China's electricity demand patterns remain in flux, according to BloombergNEF.

The plant will use electricity at night when demand is low to pump air into an underground salt cavern. Then, when demand is high during the day, it can release the compressed air at high enough pressure to spin a turbine and produce electricity, aligning with projections that 60% electricity by 2060 could be reached according to industry outlooks.

Underground compressed air is considered one of the least costly forms of long-term energy storage and has low safety concerns, according to BloombergNEF. But its reliance on certain topographical features such as underground caverns may limit wider deployment, a challenge shared by other regions weighing large-scale storage options for reliability. It’s gained a foothold in China, with nearly four gigawatts of projects in the pipeline, while there are less than two gigawatts combined planned in the rest of the world. Shandong province said just this week in this year's work plan that it would build three projects using the technology.

The Jintan salt caves in Jiangsu, China’s second-biggest provincial economy just north of Shanghai, can store about 10 million cubic meters of gas, enough to power four gigawatts of compressed air plants, according to a Science and Technology Daily report from last year. 

Energy storage is a key part of China’s plan to build a larger and more flexible grid as it tries to peak carbon emissions before 2030 and zero them out before 2060, alongside continued nuclear energy development to stabilize baseload supply. The country is adding a world-leading amount of wind and solar power every year, but their intermittency strains grids that need to be able to deliver electricity all the time, spurring interest in green hydrogen as a flexible complement. China has set targets of 30 gigawatts of new-energy storage by 2025 and 120 gigawatts of pumped hydro storage by 2030. 

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Ontario EV Clean Electricity Plan aligns EV adoption with clean power, natural gas phaseout, and grid decarbonization, cutting greenhouse gas emissions. Parties propose net-zero by 2030 as IESO warns rising gas use undermines climate gains.

Key Points

A plan to link EV growth to a cleaner grid by phasing out gas, boosting renewables, and targeting net-zero power.

✅ Parties back EVs; most pledge gas phaseout by 2030

✅ IESO projects quadrupled grid emissions under more gas

✅ Clean power needed to maximize EV climate benefits

Ontario’s political leaders are unanimously promoting electric vehicles (EVs) in their election platforms, even as Ontario's EV charging network remains only partially complete by a recent deadline. But if the electricity that powers those vehicles continues to come from burning fossil fuels, the province won’t reap the full environmental benefit of EVs, the Ontario Clean Air Alliance says.

“If we’re going to get the maximum benefit of electric vehicles, we’ve got to have a clean electricity supply,” said Jack Gibbons, chair of the alliance.

The environmental advocacy group surveyed the province’s Progressive Conservative, Liberal, NDP and Green parties about where they stand on generating electricity from natural gas, a fossil fuel. Only three committed to phasing out Ontario’s gas plants, a step seen as essential for supporting Canada's EV goals over time.

The NDP promised an electricity grid with net-zero emissions by 2030, while federal targets like the 2035 EV sales mandate shape transport electrification as well. The Liberals pledged to bring electricity emissions "as close to zero as possible by 2030.” The Green Party plans to make Ontario’s electricity “emission-free as quickly as possible,” aiming for a gas phaseout by 2030. The Progressive Conservatives did not answer the survey and did not respond to requests for comment from Canada’s National Observer.

Affordability and reliability were the top concerns for all three parties that responded, including the cost of expanding EV charging stations across the province.

Ontario used to get 25 per cent of its electricity from coal-fired power plants, even as 2019 fossil-fuel electricity share remained significant nationwide. However, in 1997, Gibbons formed the alliance to campaign against coal, and the province’s last coal-fired plant closed in 2014, leaving Ontario with one of North America’s cleanest electricity systems. At the time, Gibbons said, transitioning to gas-fired electricity made sense.

Now, Doug Ford’s Progressive Conservatives plan to double-down on gas-fired electricity generation to meet future demand, despite a looming energy storage supply crunch that is reshaping planning. As a result, planet-warming greenhouse gas emissions from electricity generation will more than quadruple by 2030, according to Ontario’s Independent Electricity System Operator (IESO).

If that happens, Ontario will lose 30 per cent of the progress it made by phasing out coal.

“If you have an increasing percentage of your electricity generated with fossil fuels, that undermines the activities of a variety of sectors in the society,” said Peter Tabuns, NDP candidate for Toronto-Danforth and former NDP energy and climate critic. “Ford's position of not committing to greening the system undermines the goals.”

In 2020, the alliance spearheaded a campaign calling on the Ford government to phase out the province’s gas plants. Thirty-two municipalities supported the campaign, and in Northern Ontario, Sudbury eco groups say sustainability is key to the grid's future. Many cities have said they will not be able to meet their own goals to fight climate change unless Ontario stops using fossil fuels for electricity.

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Vineyard Wind Offshore Wind Farm delivers clean power to Massachusetts near Martha's Vineyard, with 62 turbines and 800 MW capacity, advancing renewable energy, cutting carbon, lowering costs, and driving net-zero emissions and green jobs.

Key Points

An 800 MW Massachusetts offshore project of 62 turbines supplying clean power to 400,000+ homes and cutting emissions.

✅ 800 MW powering 400,000+ MA homes and businesses

✅ 62 turbines, 13 MW each, 15 miles from Martha's Vineyard

✅ Cuts 1.6M tons CO2 annually; boosts jobs and port infrastructure

The crisp Atlantic air off the coast of Martha's Vineyard carried a new melody on February 2nd, 2024. Five colossal turbines, each taller than the Statue of Liberty, began their graceful rotations, marking the historic moment power began flowing from Vineyard Wind, the first large-scale offshore wind farm in the United States, enabled by Interior Department approval earlier in the project timeline. This momentous occasion signifies a seismic shift in Massachusetts' energy landscape, one that promises cleaner air, lower energy costs, and a more sustainable future for generations to come.

Nestled 15 miles southeast of Martha's Vineyard and Nantucket, Vineyard Wind is a colossal undertaking. The project, a joint venture between Avangrid Renewables and Copenhagen Infrastructure Partners, will ultimately encompass 62 turbines, each capable of generating a staggering 13 megawatts. Upon full completion later this year, Vineyard Wind will power over 400,000 homes and businesses across Massachusetts, contributing a remarkable 800 megawatts to the state's energy grid.

But the impact of Vineyard Wind extends far beyond mere numbers. This trailblazing project holds immense environmental significance. By harnessing the clean and inexhaustible power of the wind, Vineyard Wind is projected to annually reduce carbon emissions by a staggering 1.6 million metric tons – equivalent to taking 325,000 cars off the road. This translates to cleaner air, improved public health, and a crucial step towards mitigating the climate crisis.

Governor Maura Healey hailed the project as a "turning point" in Massachusetts' clean energy journey. "Across the Commonwealth, homes and businesses will now be powered by clean, affordable energy, contributing to cleaner air, lower energy costs, and pushing us closer to achieving net-zero emissions," she declared.

Vineyard Wind's impact isn't limited to the environment; it's also creating a wave of economic opportunity. Since its inception in 2017, the project has generated nearly 2,000 jobs, with close to 1,000 positions filled by union workers thanks to a dedicated Project Labor Agreement. Construction has also breathed new life into the New Bedford Marine Commerce Terminal, with South Coast construction activity accelerating around the port, transforming it into the nation's first port facility specifically designed for offshore wind, showcasing the project's commitment to local infrastructure development.

"Every milestone on Vineyard Wind 1 is special, but powering up these first turbines stands apart," emphasized Pedro Azagra, CEO of Avangrid Renewables. "This accomplishment reflects the years of dedication and collaboration that have defined this pioneering project. Each blade rotation and megawatt flowing to Massachusetts homes is a testament to the collective effort that brought offshore wind power to the United States."

Vineyard Wind isn't just a project; it's a catalyst for change. It perfectly aligns with Massachusetts' ambitious clean energy goals, which include achieving net-zero emissions by 2050 and procuring 3,200 megawatts of offshore wind by 2028, while BOEM lease requests in the Northeast continue to expand the development pipeline across the region. As Energy and Environmental Affairs Secretary Rebecca Tepper stated, "Standing up a new industry is no easy feat, but we're committed to forging ahead and growing this sector to lower energy costs, create good jobs, and build a cleaner, healthier Commonwealth."

The launch of Vineyard Wind transcends Massachusetts, serving as a beacon for the entire U.S. offshore wind industry, as New York's biggest offshore wind farm moves forward to amplify regional momentum. This demonstration of large-scale development paves the way for further investment and growth in this critical clean energy source. However, the journey isn't without its challenges, and questions persist about reaching 1 GW on the grid nationwide as stakeholders navigate timelines. Concerns regarding potential impacts on marine life and visual aesthetics remain, requiring careful consideration and ongoing community engagement.

Despite these challenges, Vineyard Wind stands as a powerful symbol of hope and progress. It represents a significant step towards a cleaner, more sustainable future, powered by renewable energy sources at a time when U.S. offshore wind is about to soar according to industry outlooks. It's a testament to the collaborative effort of policymakers, businesses, and communities working together to tackle the climate crisis. As the turbines continue their majestic rotations, they carry a message of hope, reminding us that a brighter, more sustainable future is within reach, powered by the wind of change.

Additional Considerations:

• The project boasts a dedicated Fisheries Innovation Fund, fostering collaboration between the fishing and offshore wind industries to ensure sustainable coexistence.
• Vineyard Wind has invested in education and training programs, preparing local residents for careers in the burgeoning wind energy sector.
• The project's success opens doors for further offshore wind development in the U.S., such as Long Island proposals gaining attention, paving the way for a clean energy revolution.

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Harbour Air Electric Seaplanes pioneer zero-emission aviation with battery-powered de Havilland Beaver flights, pursuing Transport Canada certification for safe, fossil fuel-free service across Vancouver Island routes connecting Vancouver, Victoria, Nanaimo, and beyond.

Key Points

Battery-powered, zero-emission floatplanes by Harbour Air pursuing Transport Canada certification to carry passengers.

✅ 29-minute test flight on battery power alone

✅ New lighter, longer-lasting battery supplier partnership

✅ Aiming to electrify entire 42-aircraft Beaver/Otter fleet

Float plane operator Harbour Air is getting closer to achieving its goal of flying to and from Vancouver Island without fossil fuels, following its first point-to-point electric flight milestone.

A recent flight of the company’s electric de Havilland Beaver test plane saw the aircraft remain aloft for 29 minutes on battery power alone, a sign of an emerging aviation revolution underway.

Harbour Air president Randy Wright says the company has joined with a new battery supplier to provide a lighter and longer-lasting power source, a high-flying example of research investment in the sector.

The company hopes to get Transport Canada certification to start carrying passengers on electric seaplanes by 2023, as projects like the electric-ready Kootenay Lake ferry come online.

"This is all new to Transport, so they've got to make sure it's safe just like our aircraft that are running today,” Wright said Wednesday. “They're working very hard at this to get this certified because it's a first in the world."

Parallel advances in marine electrification, such as electric ships on the B.C. coast, are informing clean-transport goals across the province.

Before the pandemic, Harbour Air flew approximately 30,000 commercial flights annually, along corridors also served by BC Ferries hybrid ships today, between Vancouver, Victoria, Nanaimo, Whistler, Seattle, Tofino, Salt Spring Island, the Sunshine Coast and Comox.

Wright says the company plans to eventually electrify its entire fleet of 42 de Havilland Beaver and Otter aircraft, reflecting a broader shift that includes CIB-backed electric ferries in B.C.

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Canada Renewable Power sees Prairie Provinces surge as Canada Energy Regulator projects rising wind, solar, and hydro capacity in Alberta, Saskatchewan, and Manitoba, replacing coal, expanding the grid, and lowering emissions through 2023.

Key Points

A CER outlook on Canada's grid: Prairie wind, solar, and hydro growth replacing coal and cutting emissions by 2023.

✅ Prairie wind, solar capacity surge by 2023

✅ Alberta, Saskatchewan shift from coal to renewables, gas

✅ Manitoba strengthens hydro leadership, low-carbon grid

Canada's Prairie Provinces will lead the country's growth in renewable energy capacity over the next three years, says a new report by the Canada Energy Regulator (CER).

The online report, titled Canada's Renewable Power, says decreased reliance on coal and substantial increases in wind and solar capacity will increase the amount of renewable energy added to the grid in Alberta and Saskatchewan. Meanwhile, Manitoba will strengthen its position as a prominent hydro producer in Canada. The pace of overall renewable energy growth is expected to slow at the national level between 2021 and 2023, in part due to lagging solar demand in some markets, but with strong growth in provinces with a large reliance on fossil fuel generation.

The report explores electricity generation in Canada and provides a short-term outlook for renewable electricity capacity in each province and territory to 2023. It also features a series of interactive visuals that allow for comparison between regions and highlights the diversity of electricity sources across Canada.

Electricity generation from renewable sources is expected to continue increasing as demand for electricity grows and the country continues its transition to a lower-carbon economy. Canada will see gradual declines in overall carbon emissions from electricity generation largely due to Saskatchewan, Alberta, Nova Scotia and New Brunswick replacing coal with renewables and natural gas. The pace of growth beyond 2023 in renewable power will depend on technological developments; consumer preferences; and government policies and programs.

Canada is a world leader in renewable power, generating almost two-thirds of its electricity from renewables with hydro as the dominant source, and the country ranks in the top 10 for hydropower jobs worldwide. Canada also has one of the world's lowest carbon intensities for electricity.

The CER produces neutral and fact-based energy analysis to inform the energy conversation in Canada. This report is part of a portfolio of publications on energy supply, demand and infrastructure that the CER publishes regularly as part of its ongoing market monitoring.

Report highlights

• Wind capacity in Saskatchewan is projected to triple and nearly double in Alberta between 2020 and 2023 as wind power becomes more competitive in the market. Significant solar capacity growth is also projected, with Alberta adding 1,200 MW by 2023, as Canada approaches a 5 GW solar milestone by that time.
• In Alberta, the share of renewables in the capacity mix is expected to increase from 16% in 2017 to 26% by 2023, with a renewable energy surge supporting thousands of jobs. Similarly, Saskatchewan's renewable share of capacity is expected to increase from 25% in 2018 to 33% in 2023.
• Renewable capacity growth slows most notably in Ontario, where policy changes have scaled back growth projections. Between 2010 and 2017, renewable capacity grew 6.8% per year. Between 2018 and 2023, growth in Ontario slows to 0.4% per year as capacity grows by 466 MW over this period.
• New large-scale hydro, wind, and solar projects will push the share of renewables in Canada's electricity mix from 67% of installed capacity in 2017 to 71% in 2023.
• Hydro is the dominant source of electricity in Canada accounting for 55% of total installed capacity and 59% of generation, though Alberta's limited hydro stands as a notable exception, with B.C., Manitoba, Quebec, Newfoundland and Labrador, and Yukon deriving more than 90% of their power from hydro.
• The jurisdictions with the highest percentage of non-hydro renewable electricity generation are PEI (100%), Nova Scotia (15.8%), and Ontario (10.5%).
• In 2010, 62.8% of Canada's total electricity generation (364 681 GW‧h) was from renewable sources. By 2018, 66.2% (425 722 GW‧h) was from renewable sources and projected to be 71.0% by 2023.

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The Netherlands grid crisis exposes how rapid renewable energy growth is straining transmission capacity. Solar, wind, and electric vehicle demand are overloading networks, forcing officials to urge reduced peak-time power use and accelerate national grid modernization plans.

Main Points

The Netherlands grid crisis refers to national electricity congestion caused by surging renewable energy generation and rising consumer demand.

✅ Grid congestion from rapid solar and wind expansion

✅ Strained transmission and distribution capacity

✅ National investment in smart grid upgrades

The Dutch government is urging households to reduce electricity consumption between 16:00 and 21:00 — a signal that the country’s once-stable power grid is under serious stress. The call comes amid an accelerating shift to wind and solar power that is overwhelming transmission infrastructure and creating “grid congestion” across regions, as seen in Nordic grid constraints this year.

In a government television campaign, a narrator warns: “When everyone uses electricity at the same time, our power grid can become overloaded. That could lead to failures — so please try to use less electricity between 4 pm and 9 pm.” The plea reflects a system where supply occasionally outpaces the grid’s ability to distribute it, with some regions abroad issuing summer blackout warnings already.

According to Dutch energy firm Eneco’s CEO, Kys-Jan Lamo, the root of the problem lies in the mismatch between modern renewable generation and a grid built for centralized fossil fuel plants. He notes that 70% of Eneco’s output already comes from solar and wind, and this “grid congestion is like traffic on the power lines.” Lamo explains:

“The grid congestion is caused by too much demand in some areas of the network, or by too much supply being pushed into the grid beyond what the network can carry.”

He adds that many of the transmission lines in residential areas are narrow — a legacy of when fewer and larger power plants fed electricity through major feeder lines, underscoring grid vulnerabilities seen elsewhere today. Under the new model, renewable generation occurs everywhere: “This means that electricity is now fed into the grid even in peripheral areas with relatively fine lines — and those lines cannot always cope.”

Experts warn that resolving these issues will demand years of planning and immense investment in smarter grid infrastructure over the coming years. Damien Ernst, an electrical engineering professor at Liège University and respected voice on European grids, states that the Netherlands is experiencing a “grid crisis” brought on by “insufficient investment in distribution and transmission networks.” He emphasizes that the speed of renewable deployment has outpaced the grid’s capacity to absorb it.

Eneco operates a “virtual power plant” control system — described by Lamo as “the brain we run” — that dynamically balances supply and demand. During periods of oversupply, the system can curtail wind turbines or shut down solar panels. Conversely, during peak demand, the system can throttle back electricity provision to participating customers in exchange for lower tariffs. However, these techniques only mitigate strain — they cannot replace the need for physical upgrades or bolster resilience to extreme weather outages alone.

The bottleneck has begun limiting new connections: “Consumers often want to install heat pumps or charge electric vehicles, but they increasingly find it difficult to get the necessary network capacity,” Lamo warns. Businesses too are struggling. “Companies often want to expand operations, but cannot get additional capacity from grid operators. Even new housing developments are affected, since there’s insufficient infrastructure to connect whole communities.”

Currently, thousands of businesses are queuing for network access. TenneT, the national grid operator, estimates that 8,000 firms await initial connection approval, and another 12,000 seek to increase their capacity allocations. Stakeholders warn that unresolved congestion risks choking economic growth.

According to Kys-Jan Lamo: “Looking back, almost all of this could have been prevented.” He acknowledges that post-2015 climate commitments placed heavy emphasis on adding generation and on grid modernization costs more broadly, but “we somewhat underestimated the impact on grid capacity.”

In response, the government has introduced a national “Grid Congestion Action Plan,” aiming to accelerate approvals for infrastructure expansions and to refine regulations to promote smarter grid use. At the same time, feed-in incentives for solar power are being scaled back in some regions, and certain areas may even impose charges to integrate new solar systems into the grid.

The scale of what’s needed is vast. TenneT has proposed adding roughly 100,000 km of new power lines by 2050 and investing in doubling or tripling existing capacity in many areas. However, permit processes can take eight years before construction begins, and many projects require an additional two years to complete. As Lamo points out, “the pace of energy transition far exceeds the grid’s existing capacity — and every new connection request simply extends waiting lists.”

Unless grid expansion keeps up, and as climate pressures intensify, the very clean energy future the Netherlands is striving for may remain constrained by the physics of distribution.

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