Results 101 to 110 of about 13,996 (295)

Hybrid excitation synchronous generators for island operation

IET Electric Power Applications, 2012
Hybrid excitation synchronous machines (HESMs), which combine the best features of traditional electrically excited synchronous machines (SMs) and permanent magnet synchronous machines (PMSMs), are investigated. Such machines provide energy efficiency benefits over traditional field-winding-excited machines, especially in the lower power region upto a ...
K. Kamiev, J. Nerg, J. Pyrhönen, V. Zaboin, V. Hrabovcová, P. Rafajdus   +5 more
openaire   +1 more source

2D Nanomaterials Toward Function‐Ready Superlubricity in Advanced Microsystems

Advanced Materials, EarlyView.
A unified framework links structural and transformation superlubricity with microsystem functions and deployment requirements. Mechanisms, device architectures, integration strategies, AI‐guided discovery, and benchmarking protocols are connected to define function‐ready superlubricity in advanced microsystems.
Yushan Geng, Jun Yang, Yong Yang
wiley   +1 more source

Control Of Utility Interfaces In Low-voltage Microgrids

Eletrônica de Potência, 2015
This paper presents a general control technique for utility interactive inverters in low-voltage microgrids. The Utility Interface (UI) is a three-phase power conversion unit, equipped with energy storage, which governs the interaction between the ...
Paolo Tenti, Tommaso Caldognetto, Simone Buso, Danilo I. Brandao   +3 more
doaj   +1 more source

Increased Endurance of Nonvolatile Photonics Enabled by Nanostructured Phase‐Change Materials

Advanced Materials, EarlyView.
Tapered and segmented islands of the phase‐change material (PCM) antimony selenide (Sb2Se3) integrated on silicon microring resonators enable ultra‐low‐loss, high‐endurance, non‐volatile photonic tuning. The nanostructured PCM design suppresses interfacial scattering and thermal stress, achieving record endurance over 100 million electrical switching ...
Jayita Dutta, Andrew Tang, Brian Mills, Rui Chen, Arnab Manna, Gokul Nath SJ, Virat Tara, Dennis Callahan, Cosmin Constantin Popescu, Juejun Hu, Arka Majumdar   +10 more
wiley   +1 more source

Stochastic risk‐managed reserve dispatch for seamless microgrid islanding during unplanned events

The Journal of Engineering
Microgrids (MGs) can operate independently in islanded mode during utility grid outages, relying on local distributed energy resources (DERs). However, ensuring a seamless transition from grid‐connected to islanded mode requires sufficient DER capacity ...
Emmanuel Nwaulu, Tarek Medalel Masaud, Ehab El‐Saadany   +2 more
doaj   +1 more source

Elephant‐Skin‐Inspired Porous Cementitious Tiles with Programmable Crack Networks for Passive Cooling

Advanced Materials, EarlyView.
Elephant‐skin‐inspired crack networks are programmed in porous diatomaceous earth (DE)‐cement composites using substrate‐guided, stress‐concentration induced fracture. The resulting crack lattices act as capillary conduits that redistribute water, while the porous matrix stores moisture.
Qingya Huang, Kun‐Hao Yu, Ji Yoon Bae, Yunchan Lee, Dorit Aviv, Shu Yang   +5 more
wiley   +1 more source

Decentralized Unified Control for Inverter-Based AC Microgrids Subject to Voltage Constraints

IEEE Access, 2019
The control law of electronically-interfaced distributed energy resources (DERs) must be able to maintain the stability and voltage regulation of the host microgrid in the two modes of operation.
Ricardo Perez-Ibacache, Amirnaser Yazdani, Cesar Silva, Juan C. Aguero   +3 more
doaj   +1 more source

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Review of Energy Management Systems for Islanded Microgrids

发电技术
ObjectivesAgainst the backdrop of energy resource scarcity and increasing environmental demands, distributed energy supply technologies, particularly renewable energy technologies, have attracted significant attention due to their high energy efficiency,
LEI Jilin, YU Linxing, BIE Yu, XU Zhibo, XIAO Yuhan   +4 more
doaj   +1 more source

Molecular‐Level Insights into Interfacial Adsorption Mechanisms of PFOA on Functional Dolomite Surfaces via AIMD and Spectroscopy

Advanced Materials Interfaces, EarlyView.
Perfluorooctanoic acid (PFOA), ab initio molecular dynamics (AIMD), density functional theory (DFT), Dolomite (DL), metal‐organic frameworks (MOFs), calcined modified dolomite (CDL), zero‐point of charge (PZC), metal‐organic frameworks (MOFs), Fourier transform infrared (FTIR), X‐ray diffraction (XRD), scanning electron microscopy (SEM ...
Yating Yang, Yuhan Li, Zhaohui Li, Hang Wei, Yaqi Wen, Po‐Hsiang Chang, Christopher Rensing, Ahmed I. Osman, Baoyu Kong   +8 more
wiley   +1 more source