Results 111 to 120 of about 18,465 (303)

Dynamic interaction analysis of grid-following and grid-forming hybrid system based on phase angle response

International Journal of Electrical Power & Energy Systems
Grid-following (GFL) converters potentially reduce the inertia and damping of the power system, thereby weakening the grid. Deploying grid-forming (GFM) converters can effectively enhance grid strength and improve system dynamic performance. However, due
Yong Yan, Bin Wang, Liangli Zhang, Ruohan Gong, Wanwan Xu   +4 more
doaj   +1 more source

Passivity-based harmonic control through series/parallel damping of an H-bridge rectifier [PDF]

, 2007
Nowadays the H-bridge is one of the preferred solutions to connect DC loads or distributed sources to the single-phase grid. The control aims are: sinusoidal grid current with unity power factor and optimal DC voltage regulation capability.
Liserre, M., Vito G. Monopoli, Martijn M.J. de Vries, Kransse, M. J., Monopoli, V. G., Liserre, M.,, Marco J. Kransse, De Vries, M. M. J., Scherpen, J. M. A., LISERRE, Marco, Scherpen, J. M. A.,, Monopoli, V. G.,, Marco Liserre, Kransse, M. J.,, MONOPOLI, Vito Giuseppe, Jacquelien M.A. Scherpen, De Vries, M. M. J.,   +16 more
core   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Megawatt-level converter grid-forming control technology by adopting MPC for medium voltage distribution network

Frontiers in Energy Research
The grid-forming control (GFM) is treated as controlled voltage sources, which can enhance synchronize stability in weak grid case. However, the dynamic response of existing GFM method is limited, and the transient overcurrent in fault is still not ...
Shangke Liu, Xiangnan Du, Yanli Xiao, Yuanyuan Liu, Rui Zhao   +4 more
doaj   +1 more source

Interactions and stability analysis of grid-forming and grid-following converters in close proximity : an impedance-based approach [PDF]

This paper addresses the stability challenges of integrating multiple converters into AC networks, focusing on potential instabilities from interactions between converter control loops and network components.
Xu, Lie, Chen, Dong, Chen, Yin, Gebremedhin, Tesfu   +3 more
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Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Revisiting the Effect of Grid-Following Converter on Frequency Dynamics - Part I: Center of Inertia

IEEE Transactions on Power Systems
Understanding the impact of grid-following (GFL) converters on system frequency dynamics is crucial, from both the center of inertia (COI) and frequency spatial variation perspectives. Part I of this series clarifies the mechanisms by which GFLs influence COI frequency dynamics.
Jiahao Liu, Cheng Wang, Tianshu Bi
openaire   +2 more sources

Design of a robust digital current controller for a grid connected interleaved inverter

This paper is concerned with the design and practical implementation of a robust digital current controller for a threephase voltage source grid-connected interleaved inverter.
Sharkh, S. M., Abu-sara, M. A.
core