Energy Digest

Daily Summaries & Key Takeaways of Power & Energy Updates
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Last Updated: December 22, 2025 at 06:01 PM
25
News & Articles
5
Research Papers
1

Alphabet Buying Clean Energy Developer to Support Data Centers

Summary

Alphabet, the parent company of Google, has agreed to acquire Intersect, a clean energy developer that provides data center and energy infrastructure solutions, for $4.75 billion in cash and debt assumption.
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Key Takeaways

  • Alphabet is acquiring Intersect to support its growing data center operations and expand its clean energy capabilities.
  • The acquisition marks a significant investment in the clean energy sector by Alphabet, further emphasizing its commitment to sustainability.
  • As part of the deal, Google already owns a minority stake in Intersect, indicating that the company has been involved with the developer for some time.
2

Interior Dept cuts 400k homes’ electricity just before Christmas, raising prices

Summary

The Interior Department has illegally paused five wind power projects in the Atlantic, including one that was providing electricity to 400,000 homes in Massachusetts. This pause occurred just before Christmas and during a time when electricity prices have already increased compared to previous years. The move is expected to raise energy prices for households.
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Key Takeaways

  • The Interior Department's actions have resulted in the pause of five wind power projects, including one that was providing cheap electricity to 400,000 homes in Massachusetts.
  • The timing of the pause, just before Christmas and during a holiday season with already increased electricity prices, is likely to exacerbate energy price increases for households.
  • The illegality of the Interior Department's actions raises concerns about the department's role in undermining renewable energy projects and increasing reliance on fossil fuels.
3

The Hydrogen Stream: CMB.Tech secures China green ammonia offtake

Summary

CMB.Tech has secured an offtake agreement for renewable ammonia from CEEC Hydrogen Energy's 800 MW wind-and-solar-powered project in China, marking the world's largest green hydrogen, ammonia, and methanol project. Meanwhile, Gascade Gastransport has converted approximately 400 km of gas pipelines in Germany to form a new hydrogen transport corridor. These developments demonstrate growing efforts to establish large-scale renewable energy projects and hydrogen infrastructure.
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Key Takeaways

  • CMB.Tech has secured an offtake agreement for green ammonia from CEEC Hydrogen Energy's project in China, which will own a minority share in the privately owned Jiangsu Andefu company.
  • The CEEC Songyuan project is the world's largest green hydrogen, ammonia, and methanol project, with an annual production capacity of approximately 158,000 tonnes of renewable ammonia.
  • Gascade Gastransport has converted about 400 km of gas pipelines in Germany to form a new hydrogen transport corridor, establishing a key part of the German hydrogen core network.
4

Zambia Wants To Add 2.3MW Of Solar Coupled With A 4.16MWh Battery To Each One Of The Country’s 156 Constituencies

Summary

Zambia aims to increase renewable energy integration by adding solar power and a battery storage system to each of its 156 constituencies, building on the country's existing high reliance on renewables. The proposed expansion seeks to further reduce the grid's dependence on hydroelectric power. This initiative could contribute to increased energy efficiency and reduced greenhouse gas emissions.
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Key Takeaways

  • Zambia plans to add 2.3MW of solar power coupled with a 4.16MWh battery storage system to each constituency, covering 156 locations across the country.
  • The proposal aims to further diversify the country's renewable energy mix, reducing its reliance on hydroelectric power and increasing overall reliance on renewables.
  • This initiative could lead to improved energy efficiency and reduced greenhouse gas emissions in Zambia by promoting distributed solar and energy storage solutions.
5

Irish solar rises in 2025 as government plans €18.9 billion of grid upgrades

Summary

**SUMMARY** Ireland's renewable energy sector is experiencing significant growth, with solar power being a key contributor. The country has set an ambitious plan to increase the supply of onshore wind and solar electricity by 2030, backed by a €18.9 billion investment package. This growth is reflected in provisional data showing a notable increase in monthly utility-scale solar generation in the first nine months of 2025. **KEY TAKEAWAYS** * Ireland's monthly utility-scale solar generation increased from an average of 0.73 TWh in 2024 to 0.99 TWh in the first nine months of 2025, indicating a notable growth in the country's renewable energy sector. * The government has invested €18.9 billion ($22.2 billion) in a grid upgrade plan, which includes increasing the supply of onshore wind and solar electricity by 2030. * Ireland has made significant progress in its renewable energy transition, with rooftop solar capacity reaching 1 GW and total solar PV generation in 2024 standing at 1.09 TWh.
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6

BYD surpasses 1.5 million residential storage systems worldwide

Summary

BYD has reached a milestone of installing over 1.5 million residential energy storage systems worldwide, driven by its BatteryBox brand. This achievement marks 10 years of effort in the residential and small commercial energy storage market for BYD. The company claims to be one of the most widely adopted distributed energy storage solutions globally.
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Key Takeaways

  • BYD has surpassed 1.5 million global installations of its BatteryBox residential energy storage systems, indicating significant growth since June 2024.
  • This milestone reflects 10 years of effort by BYD in the residential and small commercial energy storage market, solidifying its position as a leading distributed energy storage solution.
  • The company's success with BatteryBox suggests widespread adoption of its technology globally, without specifying which regions have been most prominent.
7

US battery market faces make-or-break year in 2026

Summary

The US battery market is facing intense pressure heading into 2026, driven by rising demand for energy storage due to AI and data center-driven electricity demand, record-high electricity prices, shifting battery costs, and new policies. These factors are pushing the sector towards a "make-or-break" year, where companies must adapt to changing market conditions to remain competitive. The industry is expected to undergo significant changes in 2026.
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Key Takeaways

  • Rising AI and data center-driven energy demand is significantly increasing electricity demand, creating pressure on the battery market.
  • Shifting battery costs are unevenly impacting the sector, with project economics under strain due to these cost fluctuations.
  • New policies set to come into effect in 2026 will likely cause further shake-ups in the industry, adding to the existing pressures.
8

What the Western REC registry shake-up means for corporate clean energy

Summary

The Western Renewable Energy Generation Information System is undergoing a shake-up, which may create near-term uncertainties and risks for corporate clean energy. This change could impact the industry's ability to accurately track renewable energy production and sales. The consequences of this shake-up are still unclear.
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Key Takeaways

  • The Western REC registry shake-up poses significant challenges for tracking renewable energy production and sales in the region.
  • Near-term uncertainties may arise from the rebuilding process, potentially affecting corporate clean energy strategies and investments.
  • The impact of this change on the industry's ability to accurately report and manage renewable energy credits (RECs) is still unknown.
9

FERC Rejects Complaint over SPP’s Accreditation Practices

Summary

The Federal Energy Regulatory Commission (FERC) has dismissed a complaint filed by public interest organizations against SPP's accreditation practices for thermal and renewable resources. The complaint, which was filed in April 2024, alleged that SPP's methods were unjust, unreasonable, unduly discriminatory, or preferential. However, FERC ruled that its approval of SPP's new resource accreditation framework in July made the complaint's target "no longer effective".
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Key Takeaways

  • FERC dismissed a complaint against SPP's accreditation practices for thermal and renewable resources due to changes made to the company's methodologies.
  • The original methods were criticized for being unjust, unreasonable, unduly discriminatory, or preferential, but FERC cited its recent approval of new methodologies as rendering the complaint moot.
  • The complaint was filed under sections 206 and 306 of the Federal Power Act by organizations such as the Sierra Club, Natural Resources Defense Council, and Sustainable FERC Project.
10

Japan Prepares to Restart Unit at World’s Largest Nuclear Power Plant

Summary

The Kashiwazaki-Kariwa nuclear power plant in Japan has been given approval to restart a reactor unit, marking a significant step towards the country's nuclear energy revival. The facility, which is currently idle due to the Fukushima nuclear disaster, has sat dormant since 2012 and holds nearly 8,000 MW of total generation capacity. This move may signal a shift away from Japan's reliance on nuclear power.
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Key Takeaways

  • Local government officials in Japan have approved the restart of a reactor unit at the Kashiwazaki-Kariwa facility, which is currently one of the largest nuclear power plants in the world.
  • The restart comes nearly 12 years after the Fukushima nuclear disaster in 2011, which led to Japan's nuclear power industry being largely shut down.
  • The decision marks a significant step towards reviving Japan's nuclear energy sector and demonstrates the country's willingness to reconsider its reliance on nuclear power.
11

Home energy upgrades you’ll regret not doing while installing rooftop solar

Summary

The article highlights the benefits of upgrading home energy systems while installing rooftop solar arrays to save costs in the long run. These upgrades can range from upgrading panels to adding energy-efficient features like insulation and smart home technology. By doing so, homeowners can reap significant financial and environmental rewards.
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Key Takeaways

  • Upgrading to high-efficiency solar panels during installation can be significantly cheaper than replacing them later.
  • Adding insulation and weatherstripping while installing a rooftop solar system can help reduce heat loss and energy bills.
  • Integrating smart home technology, such as smart thermostats or energy monitoring systems, into the installation process can enhance the overall efficiency and comfort of the home.
12

Bulgarian Group Has Deal to Build Up to Six BWRX-300 SMRs

Summary

A Bulgarian energy company, Blue Bird Energy AD, has partnered with a European project developer to form a joint venture that aims to deploy up to six Small Modular Reactors (SMRs) in the country. The SMRs will be built using the BWRX-300 design from GE Vernova Hitachi Nuclear Energy. This development could potentially increase Bulgaria's nuclear energy capacity.
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Key Takeaways

  • A Bulgarian company, Blue Bird Energy AD, has partnered with SGE S.A. to form a joint venture for building up to six Small Modular Reactors (SMRs) in the country.
  • The SMRs will be designed by GE Vernova Hitachi Nuclear Energy using their BWRX-300 technology.
  • This partnership could potentially increase Bulgaria's nuclear energy capacity, as it plans to deploy up to six reactors.
13

Dutch regulator finds grid fees for rooftop solar are reasonable

Summary

**SUMMARY** The Dutch competition regulator, Authority for Consumers and Markets (ACM), has determined that grid fees for rooftop solar installations in the Netherlands are reasonable. The regulator has found that energy suppliers charge feed-in costs uniformly, making it easier for consumers to compare contracts. This decision is consistent with previous investigations by ACM, which also ruled that fees were reasonable. **KEY TAKEAWAYS** * The Dutch regulator has concluded that grid fees for rooftop solar installations in the Netherlands are not unreasonably high. * Energy suppliers in the Netherlands charge feed-in costs uniformly, making it easier for consumers to compare contracts and choose a plan that suits their needs. * This decision is consistent with previous investigations by ACM, which also ruled that fees were reasonable due to the costs incurred by energy suppliers when feeding solar power back into the grid.
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14

Trump admin ‘pauses’ leases for five offshore wind projects already under construction

Summary

The US Department of the Interior has paused leases for five large-scale offshore wind projects under construction due to "national security risks" identified by the Department of War. The Trump administration claims that the movement of blade tips and reflective towers create radar interference, posing a threat to national security. These paused projects include several high-profile offshore wind farms.
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Key Takeaways

  • The US government has paused leases for five large-scale offshore wind projects under construction due to perceived national security risks.
  • The Department of War identified potential vulnerabilities in these projects, citing radar interference as a concern caused by the movement of blade tips and reflective towers.
  • The paused projects include several high-profile offshore wind farms, including the Coastal Virginia Offshore Wind project, which was criticized for threatening grid reliability and leading to energy inflation.
15

AI tool can simulate complex fusion plasma in seconds

Summary

A team of scientists has developed an AI tool called GyroSwin that can simulate complex fusion plasma at speeds up to 1,000 times faster than traditional computational methods, making it a significant breakthrough in the field of nuclear energy.
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Key Takeaways

  • The AI tool GyroSwin allows for simulations of complex fusion plasma, which is crucial for advancing nuclear energy technologies.
  • The new method is significantly faster than traditional computational approaches, potentially accelerating research and development in the field.
  • The collaboration between UK Atomic Energy Authority, Johannes Kepler University Linz, and Emmi AI demonstrates the potential for interdisciplinary partnerships to drive innovation.
16

Can US trade policy deliver a domestic battery supply chain?

Summary

The article discusses the importance of building a domestic battery supply chain in the US, citing that limiting foreign participation is not enough to achieve this goal. A strong and diverse domestic energy storage manufacturing capacity is necessary to support US trade policy objectives. Aaron Marks argues that more needs to be done beyond just restricting foreign involvement.
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Key Takeaways

  • The article emphasizes that a domestic battery supply chain in the US requires a comprehensive approach, involving not only limiting foreign participation but also investments in domestic manufacturing infrastructure and research.
  • A lack of transparency and standardization in energy storage regulations hinders the development of a robust domestic industry, making it difficult to attract investment and talent.
  • Aaron Marks suggests that the US government needs to create incentives for domestic companies to invest in battery production, such as tax breaks or subsidies, to support the growth of this critical sector.
17

Using horizontally connected salt caverns for compressed air storage

Summary

Researchers in China have investigated the long-term stability of using horizontally connected salt caverns for compressed air energy storage. They found that approximately 85% of existing salt caverns in their country are suitable for this configuration, particularly those with low-grade inclined salt layers. The study aims to identify the optimal conditions for such caverns, which are becoming increasingly scarce due to expanding reservoirs.
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Key Takeaways

  • Approximately 85% of existing salt caverns in China are suitable for horizontally connected storage, primarily those with low-grade inclined salt layers.
  • Researchers investigated the effects of burial depth and dip angle on the stability of these caverns, aiming to identify optimal conditions for compressed air energy storage.
  • The study highlights the importance of exploring alternative storage configurations, as high-quality caverns with favorable geological conditions are becoming increasingly scarce.
18

Australian utility Flow Power closes financing on its first BESS project, in Victoria’s Latrobe Valley

Summary

Flow Power has successfully closed financing on its first battery storage project (BESS) in Victoria's Latrobe Valley, Australia, which will provide 100MW of power and 223MWh of energy storage capacity.
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Key Takeaways

  • The project is the first BESS initiative from renewable energy generator and retailer Flow Power, indicating a significant investment in the company's growth strategy.
  • A 100MW/223MWh battery storage facility in Latrobe Valley suggests that Flow Power aims to stabilize the grid during periods of high renewable energy production and ensure reliability in the region.
  • The location in Victoria, Australia, highlights the importance of regional grid stability and the need for advanced energy storage solutions to support the integration of renewable energy sources.
19

Scaling Hydrogen Production to Power California’s Data Centers

Summary

A partnership between Vema Hydrogen and Verne has been formed to deliver clean, reliable hydrogen to power California's data centers. The agreement aims to address the growing energy demands of AI-driven projects by leveraging a new method of producing hydrogen called Engineered Mineral Hydrogen (EMH). This approach bypasses traditional hydrogen production methods and utilizes geoscience wizardry to produce hydrogen on a massive scale.
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Key Takeaways

  • Verne plans to fuel its on-site power and cooling systems with over 36,000 metric tons of clean hydrogen per year, starting as early as 2028.
  • The partnership uses Engineered Mineral Hydrogen (EMH), which relies on geoscience wizardry to produce hydrogen from the rocks in gigawatt-scale quantities.
  • EMH tackles two major challenges in traditional hydrogen production methods: massive scale and unpredictability, making it an attractive solution for securing massive volumes of clean energy.
20

Mexico approves 2.4 GW of solar projects

Summary

Mexico's energy ministry has approved 20 new renewable energy projects, with 15 being solar, adding up to 3,320 MW of installed capacity. This follows an October decree that regulated private sector investments in the country's energy sector. The announcement signals a shift towards reactivating the energy sector after a six-year period of paralysis.
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Key Takeaways

  • Mexico has approved 20 new renewable energy projects, with 15 being solar, totaling 2,471 MW of installed capacity.
  • The remaining five projects are wind farms that will add an additional 894 MW to the national electricity system.
  • According to a preliminary schedule, 19% of the newly-announced projects are planned for operational completion in 2027, with the majority (78%) set to become operational by 2028.
21

Green Hydrogen-Based E-Fuels to Power Hapag-Lloyd and NCL’s Container Ships from 2027

Summary

The Zero Emission Maritime Buyers Alliance (ZEMBA) has announced that Hapag-Lloyd and North Sea Container Line (NCL) will power their container ships with green hydrogen-based e-fuels starting in 2027. The two companies have committed to using e-methanol and e-ammonia, which are produced from hydrogen via electrolysis powered by renewables. This marks a significant step towards industrial decarbonization and scaling up zero-emission technology.
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Key Takeaways

  • Hapag-Lloyd and NCL will power their container ships with green hydrogen-based e-fuels starting in 2027, marking the first multi-year commitment of its kind.
  • The companies will use approximately 70,000 metric tons of e-methanol and 25,000 tons of e-ammonia per year, which is expected to cut nearly 95,000 metric tons of CO2 equivalent emissions.
  • E-methanol and e-ammonia are produced from hydrogen via electrolysis powered by renewables, with minimal tweaks required for existing dual-fuel engines.
22

Too much to choose from, too little to decide

Summary

The article discusses the challenges of finding the perfect balance between price, quality, and reliability in power and energy systems, particularly in the solar and storage sectors. Despite advancements in technology, low-cost solutions often dominate the market, leading to concerns about long-term success and durability. As a result, manufacturers must carefully consider their product designs to ensure they meet the needs of operators.
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Key Takeaways

  • The market pressure in the solar and storage sectors favors low-cost solutions, which can lead to compromises on quality and reliability.
  • To achieve long-term success, manufacturers should prioritize higher-quality materials and more durable electronic components, especially for inverters and batteries.
  • The sustained decline in market prices has created intense pressure to cut costs and optimize products, which can result in units being packed into a single container to reduce shipping costs.
23

Hydrogen Production Trends Rise as Doosan Enerbility Secures US Data Center Gas Turbine Contracts

Summary

Doosan Enerbility has secured contracts to supply three 380 MW-class natural gas turbines to power a US data center, marking its first export of large machines designed for self-generation. This deal follows another award in October, bringing Doosan's US backlog to five turbines. The move is seen as part of the growing trend towards on-site self-generation at data centers to address grid limitations and rising kilowatt-hour prices.
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Key Takeaways

  • Data center power needs are increasing, with most new capacity in the US leaning on natural gas rather than renewable energy sources, due to the limitations of pure green energy.
  • The use of natural gas turbines for on-site self-generation at data centers allows companies to sidestep transmission snarls and lock in more predictable costs.
  • Doosan Enerbility is positioning itself as a partner for modular and scalable power solutions, backed by its nuclear pedigree and extensive testing hours.
24

Coal India starts accepting bids for 20 MW floating solar plant

Summary

Coal India Ltd. is inviting bids to develop a 20 MW floating solar facility at Chilwa Taal in Gorakhpur district, Uttar Pradesh, India. The project aims to optimize water-body use and reduce land requirements while expanding the company's renewable energy portfolio. The selected contractor will operate and maintain the plant for five years after commissioning.
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Key Takeaways

  • Coal India is developing a 20 MW floating solar photovoltaic project in Gorakhpur, Uttar Pradesh, which will utilize floating solar technology to optimize water-body use and reduce land requirements.
  • The project scope includes design, engineering, procurement, construction, installation, testing, commissioning, and ongoing operation and maintenance for five years after commissioning.
  • Bidding for the project is currently open, with a deadline of January 14, 2026, and the selected contractor will operate and maintain the plant to expand Coal India's renewable energy portfolio.
25

Hungary to host 450 MW solar plant using back-contact modules

Summary

The article reports on a 450 MW solar power plant project in northern Hungary, which will be the country's largest PV facility. The project is expected to generate approximately 470 GWh of electricity per year and reduce carbon dioxide emissions by around 415,000 metric tons annually. Solarpro, a Europe-based engineering company, is deploying nearly 700,000 Longi solar modules for the project.
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Key Takeaways

  • The 450 MW solar power plant in Hungary will be the country's largest PV facility and one of the largest in Europe.
  • The project will generate approximately 470 GWh of electricity per year, enough to supply around 106,000 households, and reduce carbon dioxide emissions by about 415,000 metric tons annually.
  • The solar panels used in the project are Longi modules with back-contact technology, which aims to improve efficiency, reduce microcracking, and support stable long-term performance under various environmental conditions.

Technical papers from ArXiv - for readers interested in academic research

1

Techno-Economic Case Study of a Rural Local Electricity Community in Switzerland

Summary

The article examines the techno-economic implications of Local Electricity Communities (CELs) in rural Switzerland, exploring how CELs can enhance renewable energy use and offer financial gains. The study found that larger and more heterogeneous communities achieve better internal matching of supply and demand, but the overall incentive remains limited due to tariff design. CELs also reduce grid imports for Distribution System Operators (DSOs), leading to a reduction in distribution tariff revenues.
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Key Takeaways

  • CELs can enhance local renewable energy use, particularly photovoltaics, and offer modest financial gains, with outcomes influenced by community size, composition, and tariff design.
  • Larger and more heterogeneous communities tend to achieve better internal matching of supply and demand through CELs, but the overall incentive is limited due to tariff structure.
  • CELs reduce grid imports for DSOs, resulting in a substantial reduction in distribution tariff revenues, requiring regulatory adaptation.
2

Linear Attention for Joint Power Optimization and User-Centric Clustering in Cell-Free Networks

Summary

This article proposes a novel transformer model that jointly optimizes AP clustering and power allocation in cell-free networks, leveraging spatial coordinates of user devices and APs. The model is designed to be lightweight, flexible, and scalable, overcoming limitations of existing deep learning approaches in handling dynamic network configurations and pilot contamination.
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Key Takeaways

  • The proposed model addresses the limitations of existing deep learning models by jointly predicting AP clusters and powers from spatial coordinates, without requiring channel estimation overhead.
  • The model incorporates a customized linear attention mechanism to capture user-AP interactions efficiently, enabling linear scalability with respect to the number of users.
  • The numerical results confirm the model's effectiveness in maximizing minimum spectral efficiency and providing near-optimal performance while ensuring adaptability and scalability in dynamic scenarios.
3

Cooperative Energy Scheduling of Multi-Microgrids Based on Risk-Sensitive Reinforcement Learning

Summary

The article proposes a risk-sensitive reinforcement learning framework with shared memory (RRL-SM) for multi-microgrid scheduling, addressing the challenges of obscured credit assignment and inefficient communication in current methods. The proposed approach leverages distributional modeling and attention-based representations to quantify the relationship between individual and joint risk values, enabling aligned local decisions with global risk objectives. Simulation results demonstrate a favorable balance between reliability and economic performance.
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Key Takeaways

  • The article proposes a novel reinforcement learning framework (RRL-SM) for multi-microgrid scheduling that addresses challenges of current methods, including obscured credit assignment and inefficient communication.
  • The proposed approach uses distributional modeling and attention-based representations to quantify the relationship between individual and joint risk values, enabling aligned local decisions with global risk objectives.
  • Simulation results show that RRL-SM reduces load-shedding risk by 84.5%, demonstrating a favorable balance between reliability and economic performance in multi-microgrid scheduling.
4

Dispatch-Aware Learning for Optimal Transmission Switching

Summary

The article proposes a dispatch-aware deep neural network (DA-DNN) to accelerate optimal transmission switching (OTS), which improves optimal power flow (OPF) by selectively opening transmission lines. The proposed method uses a DC-OPF layer and achieves stable learning through customized weight-bias initialization, enabling it to produce feasible topologies and dispatch pairs in the same time as solving the DCOPF. This approach captures the economic advantages of OTS while maintaining scalability and generalization ability.
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Key Takeaways

  • The proposed DA-DNN accelerates DC-OTS without relying on pre-solved labels, addressing the computational complexity issue associated with optimal power flow.
  • The embedded differentiable DC-OPF layer ensures that all physical network constraints are enforced throughout training and inference, maintaining the integrity of the optimization process.
  • The customized weight-bias initialization enables stable learning from the first iteration, allowing the DA-DNN to produce feasible topologies and dispatch pairs in a comparable time frame to solving the DCOPF.
5

Layer-to-layer Closed-loop Switched Heating and Cooling Control of the Laser Powder Bed Fusion Process

Summary

The article discusses a novel controller for the laser powder bed fusion process, which stabilizes interlayer temperature through closed-loop feedback control. The controller measures interlayer temperature using a thermal camera and adjusts laser power to maintain a preset reference temperature. The study evaluates the performance of the controller in supported and unsupported overhanging parts, highlighting its effectiveness in controlling interlayer temperature.
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Key Takeaways

  • The proposed controller is effective in stabilizing interlayer temperature across varying cross-sectional areas while remaining within the material's stable processing zone.
  • The controller's performance depends on the support structure used during build, with supported parts exhibiting reduced overheating but higher energy and material consumption, while unsupported parts have faster build times due to increased dwell time assignments.
  • The introduction of interlayer dwell time offers a practical solution for maintaining thermal stability in complex geometries prone to excessive thermal stresses.