Articles tagged with Power Systems
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A new wireless laser charging system uses infrared light to transfer high levels of power over distances of up to 30 meters, sufficient for charging sensors. The system automatically shifts to a safe low power delivery mode if an object or person blocks the line of sight, achieving hazard-free power delivery in free space.
Researchers at Gwangju Institute of Science and Technology improve triboelectric nanogenerators by using mesoporous carbon spheres to enhance charge transport and surface charge densities. The device achieves a 1300-fold higher output current, enabling potential sustainable energy harvesting.
Researchers developed a novel computational method to control large complex networks using local information, addressing the challenge of controlling complex systems. The method considers computational time and information communication costs to produce optimal choices.
A study by Cornell University engineers reveals that smart thermostats inadvertently cause peak demand on the grid during off-peak hours, offsetting greenhouse gas emissions benefits. The researchers propose educating consumers to use smart thermostats and staggering morning ramp-up times to mitigate this issue.
A team of scientists from Tokyo Institute of Technology has developed a wirelessly powered transmitter-receiver for 5G networks that can transmit power and signals simultaneously. The device overcomes the limitations of previous devices by generating power over large angles and distances.
Researchers at FSU's CAPS have developed a new superconducting cable system that uses helium gas for cooling, overcoming previous limitations. This breakthrough enables the creation of highly compact and efficient power cables suitable for electric ships and aircraft.
The article discusses the advantages of using SiC MOSFETs in power converters, including high efficiency, power density, and fast switching speeds. Researchers have developed novel control technologies, such as SCC and ICBT methodologies, to improve the performance of SiC MOSFETs in medium-voltage applications, enabling their adoption ...
Researchers at Chalmers University of Technology have successfully converted solar energy into electricity using a thermoelectric generator. The new technology can store solar energy for up to 18 years and release it when needed, making it a promising solution for renewable energy production.
A new framework by Stanford University could help policymakers spend billions on federal infrastructure funding more wisely. The study optimizes hourly demand and supply of power and water with integrated neighborhood-based power and water plants, significantly reducing costs and pollution.
The Texas cold snap highlighted the critical role of electricity in society and the need for improved power system planning to withstand extreme weather events. The event showed that traditional planning based on historical weather patterns is not sufficient, and new information from climate projection models is needed.
A WVU postdoctoral researcher has made a groundbreaking discovery in the field of magnetic reconnection, which can be used to predict space weather events that affect satellite and power grid systems. The study uses advanced laser diagnostics to measure electron speeds, providing new insights into plasma physics processes.
Researchers propose a disaggregation strategy to estimate power consumption of individual electrical facilities, improving accuracy over traditional methods. The new approach uses linear regression residuals and clustered daily routines to provide more accurate estimations for workdays and holidays.
Researchers developed a machine-learning technique that can pinpoint anomalies in large datasets, such as power grid failures and traffic bottlenecks. The model uses advanced probability distributions to identify low-density values, allowing for faster and more accurate anomaly detection.
A new study reveals that Viking raids in ancient Scandinavia had a profound effect on the economic and political landscape of modern-day Russia. The plunder economy, which existed until the early Middle Ages, continued to shape local economies and societies in Eastern Russia, particularly in the Volga, Caspian, and Caucasus regions.
A Penn State study integrates multiple models to capture climate-related interactions between water, power, and economic systems. Higher water temperatures can lead to a causal chain of events, including generator outages, higher costs, and productivity reductions.
Researchers at Idaho National Laboratory have created a nationwide-scale electric power grid test bed to develop and demonstrate cutting-edge technologies for grid modernization. The enhanced test bed offers a collaborative environment for labs, industry, academia, and government to leverage shared resources.
Researchers propose a new model for electricity trade that balances economic interests and considers the stability of economic ties. The model suggests ways to improve cooperation between nations and prioritize transit country interests.
A team of scientists from GIST developed an AI-based approach to analyze and extract user behavior data, estimating the optimal demand response management for each household. The study showcases how AI can improve electricity consumption, leading to lower prices and a smaller carbon footprint.
Researchers found that bigger connections between the two grids can increase transmission capacity and provide significant value through sharing generation resources and flexibility across regions. The study suggests that a macrogrid could pay for itself in three primary ways: by helping different parts of the country meet their peak d...
The AI optimization improves the motor's power factor, reducing disruptions to the power grid. The optimized motor shows excellent performance, with improved efficiency and increased torque while drawing less current.
Researchers at Washington University in St. Louis have developed a bifunctional catalyst for the oxygen electrode, enabling high round-trip energy efficiency in unitized regenerative fuel cells. The catalyst, Pt-Pyrochlore, has a bifunctionality index of 0.56 volts and achieved a RTE of 75%.
A new warning system has been proposed to address increasing heat waves due to climate change, taking into account evolving heat thresholds and longer hot seasons. The system aims to prevent heat-related mortality outside typical heat wave periods through health alerts.
A Dartmouth Engineering study finds that incorporating renewable energy into the American Electric Power System would boost the grid's ability to withstand attacks and maintain its resilience. The researchers used a novel method called hetero-functional graph theory to analyze over 175,000 energy resources in the US.
A new decision support system (DSS) simulates electric power system emergencies in real-time, allowing dispatchers to test actions and evaluate consequences quickly. The system outperforms traditional simulations by five folds, enabling more accurate decision-making.
A SUTD study found that big droughts in the Greater Mekong region reduce hydropower production, leading to increased fossil fuel use and higher carbon emissions. The researchers suggest using mathematical models to coordinate water-energy operations and prepare contingency plans for droughts.
Navatek and UofSC will develop advanced power control systems to intelligently manage ship resources and create a first-of-a-kind digital twin for the US Navy. The partnership aims to drive technological innovation and create jobs in South Carolina.
The $2.5 million project aims to create compact electronic power systems for military installations, utilizing gallium nitride devices for efficient energy storage and discharging. Machine learning will be used to predict the lifespan of GaN devices and circuits.
RepuCoin introduces a reputation-based system that makes it difficult for attackers to control the network. The longer the system runs, the more resilient it becomes to attacks, with an attacker needing thousands of times more computational power to breach security.
PhasorSec, developed at Dartmouth's Trust Lab, uses Language-theoretic Security principles to filter out inputs that compromise the power system. The tool provides a validation filter for network data packets, addressing concerns over potential vulnerabilities in IEEE C37.118 protocol.
A recent study suggests that Concentrated Solar Power (CSP) can be the key to China meeting its climate commitments. CSP can store energy relatively inexpensively and dispatch it day or night, making it a more cost-effective option than traditional renewable energy sources like wind power and PV. The study found that substituting CSP f...
A breakthrough in modular power electronics systems aims to revolutionize the way we distribute energy. By developing 'LEGO-like' power electronic systems with high-performance modular power converters, researchers can create flexible and efficient microgrids that can work in both grid-connected and autonomous modes.
Researchers developed a hydrogenated diamond circuit operational at 300 degrees Celsius, outperforming silicon-based devices in terms of efficiency and temperature resistance. The discovery has potential to improve energy savings and enable the construction of smaller, lighter electronic devices.
A new design proposes a top-level intelligent dispatch system that incorporates artificial systems and real-world input to find the best way to dispatch power quickly and efficiently. By leveraging historical operation actions and records, the dispatch system can convert human experience into intelligent technical models.
A new study found that a small set of vulnerable patches in power grid networks disproportionately cause costly cascading failures. The study analyzed data from the U.S.-Canadian power grid system and developed a model of network connectedness, revealing that only 10.8% of links ever underwent primary failure.
A new framework developed by MIT researchers guarantees stability in microgrids supplying local power to communities, reducing the reliance on main power grids. The design allows for modular power systems that can be easily reconfigured for changing needs, providing a lower-cost solution with guaranteed reliability and security.
A North Carolina State University team has developed a system that simultaneously delivers watts of power and transmits high-speed data, achieving true single-wire connections. The researchers found that their system is comparable in power transfer efficiency to similar wireless power transfer devices.
Scientists have developed a new algorithm that can mirror a microgrid's inertia by adjusting the photovoltaic system's direct current. The solution aims to make microgrids work like large power grids with high inertia, improving stability and reliability.
Scientists assessed the state of space weather research, including geomagnetically induced currents (GICs) that can disrupt power systems, railroads, and pipelines. GICs can cause temporary blackouts and mis-operation of railway signaling systems.
Engineers at Duke University and the University of Washington propose a flat-screen wireless charging system using metamaterials. The technology can charge devices within a room, eliminating cord hassles and power shortages.
Researchers at Northeastern University have proposed a way to optimize power exchange between the main grid and multiple microgrids using consensus-based algorithms. These algorithms allow decentralized generators to communicate with each other and with the main grid, ensuring reliable and cost-effective energy distribution.
Researchers at Binghamton University have developed an algorithm using Singular Spectrum Analysis (SSA) to quickly detect and locate power grid faults, providing a promising solution for authorities to remotely identify issues before they cause prolonged outages or equipment damage.
Sandia researchers have developed a way to make magnetic material for high-frequency transformers, which could lead to more flexible energy storage systems. The new method, called field-assisted sintering, enables the creation of transformer cores from raw materials in minutes without decomposing the required iron nitrides.
Scientists from ITMO University developed a novel WPT system that maintains up to 80% transfer efficiency across 20 centimeters, making it suitable for commercial applications. The system uses spherical dielectric resonators and a higher-order resonant frequency mode to reduce power losses.
Eftekharnejad's research will investigate the impacts of data intrusion on phasor measurement units (PMU) devices and propose mitigation strategies for power grid security. The study aims to identify critical components targeted by cyberattacks and develop methods to mitigate cascading blackouts.
Researchers at North Carolina State University developed a new technique for creating low-cost, high-efficiency power converters for embedded systems. The prototypes achieved 95% efficiency and 50-cent component costs, outperforming existing market options.
A Johns Hopkins University analysis finds that climate change will make cities like New York and Philadelphia more susceptible to blackouts caused by future hurricanes. The team predicts a 50% increase in power outages in these cities, with Miami and New Orleans expected to see a 30% increase.
Researchers from the University of Surrey and Ben-Gurion University in Israel have developed a new method to detect the elusive Majorana particle, potentially leading to the creation of topological Q-Bits. This breakthrough could significantly enhance the power of quantum computers, breaking the barriers on scaling up computation.
Wind farms can worsen oscillations in power grids if sited incorrectly. Researchers developed algorithms that match control efforts between wind farms and energy storage facilities to mitigate these effects, restoring stable grid behavior. This approach is crucial for the increasing integration of wind energy into the US power grid.
The Journal of Modern Power Systems and Clean Energy presents top-level academic achievements by international researchers and engineers. The partnership aims to improve communication among power systems researchers and bring their important topics to an international audience.
NASA has awarded a $100,000 grant to Penn State researcher Michael V. Paul for developing non-radioisotope power systems. The project aims to explore sunless solar system missions using metal-combustion engines, which could enable low-cost planetary exploration without relying on radioisotope power sources.
The National Institute of Standards and Technology (NIST) has developed test methods to evaluate the reliability of wireless alarm beacons for firefighters and emergency responders. The tests found that even weak signals can cause delays or failures, making it essential to ensure these devices operate reliably in realistic conditions.
Researchers have developed a wireless power system that can power ventricular assist devices without a cord, reducing the risk of infection and improving patient quality of life. The system uses inductive power and has been shown to be efficient over medium distances, allowing patients to be free from cords for short periods.
PSERC is investigating innovations in network architectures and planning approaches to achieve sustainable energy systems with high penetrations of renewable resources. The future grid will be more complex, heterogeneous, and dynamic due to the variability of renewable energy production.
Researchers from North Carolina State University have developed an approach to create reliable models of large power systems using Synchrophasor technology, enabling real-time monitoring and prediction of blackouts. The approach uses high-resolution power-system measurements to capture the dynamics of clusters and their connections, he...
A study published in Chaos found that traditional topological models, which rely on abstract network connections, are less accurate than physics-based models when assessing the vulnerability of the US electric grid. The researchers conclude that the grid's unpredictability makes it difficult to identify potential attack points.
A study published in Physical Review E found that a loss of just 2% of US power grid substations can cause catastrophic failure. Researchers identified high-load transmission substations as critical points, emphasizing the need for increased redundancy and distributed generation.
The Eastern Interconnection Phasor Project provides real-time system-wide data to utilities and transmission operators, potentially preventing cascading loss of power. The project uses satellite-based time clocks and sophisticated signal processing to enable more accurate monitoring and analysis.
Researchers at Virginia Tech have developed a high-power semiconductor switch called the Emitter Turn-off (ETO) Thyristor, suitable for fast and dynamic voltage support in the nation's congested power grid. The ETO switch offers fast switching speed, rugged turn-off capacity, and voltage control, reducing energy storage elements and size.