Results 81 to 90 of about 27,637 (228)

Improving Power Quality of a Hybrid Grid-Connected Photovoltaic–Wind Microgrid Using Shunt Active Power Filter and Distribution Static Synchronous Compensator

International Transactions on Electrical Energy Systems
Unbalanced voltage and harmonics are major challenges in a microgrid. Single- and two-phase loads and short circuit can make unbalanced voltage. Besides, nonlinear loads create harmonic components in the grid.
Ehsan Akbari, Abbas Zare Ghaleh Seyyedi
doaj   +1 more source

Mitigation of Asymmetrical Grid Faults in Induction Generator-Based Wind Turbines Using Constant Power Load

Energies, 2013
Constant power loads (CPLs), interfaced through active rectifiers can be used for improving the stability of induction generator (IG)-based wind turbines under balanced grid voltage dips by providing the reactive power.
Marta Molinas, Nadeem Jelani
doaj   +1 more source

Variable-Angle Phase-Shifted PWM for Multilevel Three-Cell Cascaded H-bridge Converters [PDF]

, 2017
Multilevel cascaded H-bridge converters have become a mature technology for applications where high-power medium ac voltages are required. Normal operation of multilevel cascaded H-bridge converters assumes that all power cells have the same dc voltage ...
Freire Macías, Emilio, García Franquelo, Leopoldo, Kouro, Samir, León Galván, José Ignacio, Márquez Alcaide, Abraham, Portillo Guisado, Ramón Carlos, Vázquez Pérez, Sergio   +6 more
core   +1 more source

MGM as a Large‐Scale Pretrained Foundation Model for Microbiome Analyses in Diverse Contexts

Advanced Science, EarlyView.
We present the Microbial General Model (MGM), a transformer‐based foundation model pretrained on over 260,000 microbiome samples. MGM learns contextualized microbial representations via self‐supervised language modeling, enabling robust transfer learning, cross‐regional generalization, keystone taxa discovery, and prompt‐guided generation of realistic,
Haohong Zhang, Yuli Zhang, Zixin Kang, Jiayun Xiong, Ronghua Yang, Kang Ning   +5 more
wiley   +1 more source

A Control Method for Unbalanced Current in Grid Type Energy Storage Based on Negative Sequence Virtual Impedance

IEEE Open Journal of Circuits and Systems
Grid type energy storage has inertia support capability, and unbalanced grid voltage will cause grid type energy storage current fluctuation and active power fluctuation.
Li You, Liangli Xiong, Gang Han, Sheng Zhang, Zhijian Fang   +4 more
doaj   +1 more source

ExaGridPF: A Parallel Power Flow Solver for Transmission and Unbalanced Distribution Systems

, 2017
This paper investigates parallelization strategies for solving power flow problems in both transmission and unbalanced, three-phase distribution systems by developing a scalable power flow solver, ExaGridPF, which is compatible with existing high ...
Bachan, John, Chan, Cy, Wang, Bin
core   +1 more source

Voltage dip generator for testing wind turbines connected to electrical networks [PDF]

, 2011
This paper describes a new voltage dip generator that allows the shape of the time profile of the voltage generated to be configured. The use of this device as a tool to test the fault ride-through capability of wind turbines connected to the electricity
Abbesa, Atienza, C. Veganzones, C.A. Platero, D. Ramirez, F. Blazquez, F. Gordillo, Flannery, Garnacho, J. Merino, J.A. Sanchez, J.R. Arribas, Ledesma, N. Herrero, Rahimi, Rodriguez, S. Martinez, Sanchez, Santos-Martin, Slemon, Tsili, Veganzones   +21 more
core   +2 more sources

APOE‐stratified Proteomic and Metabolomic Analysis Reveals Mitochondrial Dysfunction Inflammation and Lipid Dysregulation in Alzheimer's Disease

Advanced Science, EarlyView.
A large‐scale multiomic dataset (proteomic and metabolomic) comprising 3,060 plasma samples were analyzed to identify proteins, metabolites, pathways, and protein‐associated drugs linked to Alzheimer’s Disease (AD) independently of apolipoprotein E (APOE). AD was associated with a distinct molecular signature that captures.
Fuhai Li, Yike Chen, Daniel Western, Muhammad Ali, Menghan Liu, Katherine Gong, Ying Xu, Joseph Lowery, David M. Holtzman, Chloe Robins, John D. Eicher, Yen‐Ning Huang, ShiWei Liu, Tamina Park, Andrew J. Saykin, Kwangsik Nho, Mahdi Moqri, Richard C. Mohs, Amelia Farinas, Patricia Moran‐Losada, Hamilton Se‐Hwee Oh, Tony Wyss‐Coray, Carlos Cruchaga   +22 more
wiley   +1 more source

Optimal Current Balance Control of Three-Level Inverter under Grid Voltage Unbalance: An Adaptive Dynamic Programming Approach

Energies, 2019
When the grid voltage is unbalanced, the positive and negative sequence components in the grid voltage cause grid current to be disordered. Under current balance control, proportional integral (PI) closed-loop control will increase the grid currents ...
Yunjun Yu, Zhongyang Wang, Xiaofeng Wan
doaj   +1 more source

Engineered GM1 Intersects Between Mitochondrial and Synaptic Pathways to Ameliorate ALS Pathology

Advanced Science, EarlyView.
Amyotrophic Lateral Sclerosis (ALS) is a fatal neurodegenerative disease driven by genetic and molecular disruptions affecting energy balance, protein homeostasis, and stress responses in nerve cells. Studies using human and rodent models identified convergent defects in mitochondria and synaptic function.
Federica Pilotto, Tristan Dellazizzo Toth, Silvano Bond, Alexander Schmitz, Rim Diab, Sara Y. Ngo Tenlep, Brian Mooney, Silvia Erni, Martina Schobesberger, Olivier Scheidegger, Camille Peitsch, Smita Saxena   +11 more
wiley   +1 more source