Results 51 to 60 of about 200,271 (291)

Short-Circuit Analysis of DER-Based Microgrids in Connected and Islanded Modes of Operation

Energies, 2021
Since microgrids should be able to smoothly operate in two distinct modes—grid-connected and islanded, their fault currents can widely fluctuate depending on the operational mode. When the microgrid is connected to the grid, the highest fault current, by
Nikola Simic, Luka Strezoski, Boris Dumnic   +2 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Inverse time overcurrent protection for low-frequency wind farm transmission lines based on transient current components

International Journal of Electrical Power & Energy Systems
Low-Frequency Transmission Systems (LFTS) integrate the benefits of both high-voltage alternating current (HVAC) and high-voltage direct current (HVDC) transmission technologies. This combination makes LFTS a significant innovation for transmitting large
Yue Dai, Wei Zhao, Hongchun Shu
doaj   +1 more source

Flexiable Fault Ride Through Capability Improvement of Semi-Direct Drive Wind Power System Based on Improved Grid-Side Control Strategy

南方能源建设, 2023
[Introduction] In order to improve the flexible fault ride through (FFRT) capability of semi-direct drive wind power system, this paper proposes an improved grid-side control strategy with reactive power priority.
Jiangtao GUO, Shuo CHEN, Liling HUANG
doaj   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

Service restoration strategy for active distribution networks considering source-load uncertainty

International Journal of Electrical Power & Energy Systems
Active distribution networks (ADNs) incorporate numerous distributed generations (DGs) and energy storage systems. When sudden faults occur in the system, service restoration can be enhanced through microgrid formation and network reconfiguration ...
Hongchun Shu, Hongfang Zhao, Xuezhuan Zhao   +2 more
doaj   +1 more source

Dynamic effects of fault modeling on stair-step and corner-point grids

Journal of Petroleum Exploration and Production Technology, 2021
Fault modeling has become an integral element of reservoir simulation for structurally complex reservoirs. Modeling of faults in general has major implications for the simulation grid.
Faruk O. Alpak, Tianhong Chen
doaj   +1 more source

Laser Metal Deposition of Aluminum Alloys 7075 and 5083 with the Addition of Volatile Alloying Elements through Powder Blending

Advanced Engineering Materials, EarlyView.
This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen, Anastasiya Toenjes, Annika Bohlen, Thomas Seefeld   +3 more
wiley   +1 more source

Multi-terminal flexible DC grid circuit breaker withstands multi-lightning strike analysis

Scientific Reports
Lightning represents the primary threat to power grids, with approximately 80% of natural occurrences being multi-lightning strikes, which have been extensively studied and confirmed to pose even more severe hazards.
Yutao Tang, Hongchun Shu, Kai He, Yue Dai, Yu Kuang, Yiming Han, Weijie Lou   +6 more
doaj   +1 more source

Research on the improved hybrid DC circuit breaker with voltage-limiting and current-limiting capability

International Journal of Electrical Power & Energy Systems
The DC circuit breaker (DCCB) is a critical device that ensures the safe and reliable operation of the DC transmission system. As the level of DC voltage and transmission power increases, the flexible DC grid will need more and more opening capacity of ...
Hongchun Shu, Zongxue Shao, Yue Dai
doaj   +1 more source