Results 81 to 90 of about 37,230 (297)

A DFIG low- and High-Voltage cascading failure through strategy based on GSC and RSC joint control

International Journal of Electrical Power & Energy Systems
In wind power DC transmission systems, commutation failures cause significant reactive power fluctuations at the direct current (DC) transmission end, leading to sequential changes in voltage from low to high and often causing wind turbines to disconnect
Xu Zhang, Xin Xu, Yi Wang, Juan Wei
doaj   +1 more source

Fault ride-through of renewable energy conversion systems during voltage recovery

Journal of Modern Power Systems and Clean Energy, 2016
Asymmetrical voltage swells during recovery of a short-circuit fault lead to fluctuations in the dc-link voltage of a renewable energy conversion system (RECS), and may induce reversed power flow and even trip the RECS. This paper studies characteristics
Ruiqi Li, Hua Geng, Geng Yang
doaj   +1 more source

A Dynamic Localized Adjustable Force Field Method for Real-time Assistive Non-holonomic Mobile Robotics [PDF]

, 2015
Providing an assistive navigation system that augments rather than usurps user control of a powered wheelchair represents a significant technical challenge.
Gillham, Michael, Howells, Gareth
core   +2 more sources

Neighborhood social environments and mental health among youth and adults in public housing

American Journal of Community Psychology, EarlyView.
Abstract Neighborhoods influence health in part through social processes. However, little is known about how multiple neighborhood social processes co‐occur, or about within (vs. between) neighborhood variation in social processes and health. This study asked how residents of a large public housing development describe their neighborhood and used ...
Jane Leer, Lindsay Lanteri, Rebekah Levine Coley, Samantha Teixeira   +3 more
wiley   +1 more source

International White Book on DER Protection : Review and Testing Procedures [PDF]

, 2011
This white book provides an insight into the issues surrounding the impact of increasing levels of DER on the generator and network protection and the resulting necessary improvements in protection testing practices.
Abdulhadi, Ibrahim Faiek, Booth, Campbell, Burt, Graeme, Coffele, Federico, Crolla, Paul, Dysko, Adam, Li, Xinyao, Schafer, Nils   +7 more
core  

Definitions of community‐level approaches to address substance‐related harms and lessons learned: A systematic overview of reviews

American Journal of Community Psychology, EarlyView.
Abstract Community action focused on sociocultural and environmental influences to prevent alcohol and other drug (AOD) use and related harms is a global priority. Despite this recognition, understanding of effective community‐level approaches is limited.
Peter Gates, Andrea Zocco, Sara Farnbach
wiley   +1 more source

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters [PDF]

Energies, 2017
This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control ...
Md Shafiul Alam, Mohammad Abido
openaire   +2 more sources

Investigation on influential factors on chloride concentration index of cement-based materials by pore solution expression method [PDF]

, 2020
In this study, the effects of different factors on chloride concentration index (N-c) of cement paste were studied. The factors including chloride concentration in soaking solution, slag replacement, external applied voltage and cation ions of soaking ...
De Schutter, Geert, Hu, Xiang, Shi, Caijun, Zhu, Deju   +3 more
core   +1 more source

Equine models in translational medicine: A comparative approach to human health

Animal Models and Experimental Medicine, EarlyView.
This diagram summarizes and contrasts rodent and equine models, outlining their strengths, limitations, and applications. Horses offer naturally occurring diseases, genetic and physiological similarities to humans, and suitability for longitudinal and clinical‐scale studies.
Shayan Boozarjomehri Amnieh, Katarzyna Ropka‐Molik   +1 more
wiley   +1 more source

Hierarchical control-based fault ride-through of VSC-HVDC considering impacts of renewable energy

International Journal of Electrical Power & Energy Systems
When a short-circuit fault occurs at the receiving-end grid, the unbalanced power in voltage source converter based high voltage direct current (VSC-HVDC) should be consumed to prevent excessive DC voltage rise, thereby enabling fault ride-through ...
Jinxin Ouyang, Fan Mo, Jiyu Chen
doaj   +1 more source