Results 31 to 40 of about 1,317,065 (284)

Fault Ride-Through Techniques for Permanent Magnet Synchronous Generator Wind Turbines (PMSG-WTGs): A Systematic Literature Review

open access: yesEnergies, 2022
Global warming and rising energy demands have increased renewable energy (RE) usage globally. Wind energy has become the most technologically advanced renewable energy source. Wind turbines (WTs) must ride through faults to ensure power system stability.
Ernest F. Morgan   +4 more
doaj   +1 more source

SMART GRIDS – GENERAL REVIEW OF SYNCHRONIZATION TECHNIQUES

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2013
This paper deals with crucial aspect of synchronization in modern power grids. It presents the concept of intelligent networks (“smart grids”), as the future of today’s grid infrastructure.
Piotr Lipnicki
doaj   +1 more source

Mapping of grid faults and grid codes [PDF]

open access: yes, 2007
The present report is a part of the research project “Grid fault and designbasis for wind turbine” supported by Energinet.dk through the grant PSO F&U 6319. The objective of this project is to investigate into the consequences of the new grid connection requirements for the fatigue and extreme loads of wind turbines. The goal is also to clarify and
Iov, F.   +3 more
openaire   +2 more sources

Leveraging legacy codes to distributed problem solving environments: A web service approach [PDF]

open access: yes, 2003
This paper describes techniques used to leverage high performance legacy codes as CORBA components to a distributed problem solving environment. It first briefly introduces the software architecture adopted by the environment.
Li, M   +5 more
core   +6 more sources

Stability Assessment and Enhanced Control of DFIG-Based WTs During Weak AC Grid

open access: yesIEEE Access, 2022
According to the latest grid codes, wind turbines (WTs) are required to inject certain amount of reactive and active current into the faulty grid during voltage sags.
Zhi Li   +3 more
doaj   +1 more source

Minimum-Density Identifying Codes in Square Grids [PDF]

open access: yes, 2016
An identifying code in a graph $G$ is a subset of vertices with the property that for each vertex $v \in V(G)$, the collection of elements of $C$ at distance at most $1$ from $v$ is non-empty and distinct from the collection of any other vertex. We consider the minimum density $d^*({\cal S}_k)$ of an identifying code in the square grid ${\cal S}_k$ of ...
Bouznif, Marwane   +2 more
openaire   +4 more sources

A classification of emerging and traditional grid systems [PDF]

open access: yes, 2008
The grid has evolved in numerous distinct phases. It started in the early ’90s as a model of metacomputing in which supercomputers share resources; subsequently, researchers added the ability to share data.
Li, M, Kurdi, H, Al-Raweshidy, H
core   +5 more sources

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

A Case Study on Distributed Energy Resources and Energy-Storage Systems in a Virtual Power Plant Concept: Technical Aspects

open access: yesEnergies, 2020
The article presents calculations and power flow of a real virtual power plant (VPP), containing a fragment of low and medium voltage distribution network.
Tomasz Sikorski   +14 more
doaj   +1 more source

Finding Codes on Infinite Grids Automatically

open access: yesFundamenta Informaticae
We apply automata theory and Karp’s minimum mean weight cycle algorithm to minimum density problems in coding theory. Using this method, we find the new upper bound 53/126 ≈ 0.4206 for the minimum density of an identifying code on the infinite hexagonal grid, down from the previous record of 3/7 ≈ 0.4286.
Törmä Ilkka, Salo Ville
openaire   +3 more sources

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