Results 31 to 40 of about 359,372 (263)

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

Methodology for Tuning MTDC Supervisory and Frequency-Response Control Systems at Terminal Level under Over-Frequency Events

open access: yesEnergies, 2020
This paper proposes a methodology for tuning a supervisory and frequency-response outer loop control system of a multi-terminal direct current (MTDC) grid designed to transmit offshore wind energy to an onshore AC grid, and to provide frequency support ...
Marta Haro-Larrode   +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   +3 more sources

Secondary Voltage Control Application in a Smart Grid with 100% Renewables

open access: yesInventions, 2020
This paper presents secondary voltage control by extracting reactive power from renewable power technologies to control load buses voltage in a power system at different operating conditions.
Omar H. Abdalla   +2 more
doaj   +1 more source

Cooperative LVRT control for protecting PMSG-based WTGs using battery energy storage system

open access: yesEnergy Reports, 2023
Low-voltage ride-through (LVRT) capability is crucial for wind power plants that are grid-connected. A grid code requires wind farms to remain on-grid and inject a specific reactive current when a grid fault occurs.
Tien Nguyen Huy   +3 more
doaj   +1 more source

The GridCAT: A Toolbox for Automated Analysis of Human Grid Cell Codes in fMRI

open access: yesFrontiers in Neuroinformatics, 2017
Human functional magnetic resonance imaging (fMRI) studies examining the putative firing of grid cells (i.e., the grid code) suggest that this cellular mechanism supports not only spatial navigation, but also more abstract cognitive processes.
Matthias Stangl   +3 more
doaj   +1 more source

Improvement of Low Voltage Ride-Through (LVRT) of Doubly Fed Induction Generator (DFIG)-Based Wind Energy Conversion Systems (WECSs) by STATCOMs: A Systematic Literature Review

open access: yesEnergies
To maintain power system stability and supply quality when integrating doubly fed induction generator (DFIG)-based wind energy conversion systems (DFIG-WECSs), regulators regularly update grid codes specifying low voltage ride-through (LVRT) requirements.
Nhlanhla Mbuli
doaj   +1 more source

Spatial biology in cancer epigenetics

open access: yesMolecular Oncology, EarlyView.
Spatial epigenomics combines molecular profiling with tissue architecture to reveal how gene regulation is organized within intact tissues. In cancer, these technologies uncover the mechanisms driving tumor heterogeneity and microenvironmental interactions, opening new opportunities for biomarker discovery and precision medicine.
Eva Crespo‐García, Manel Esteller
wiley   +1 more source

Development and Assessment of Spacer Grid Model in COSINE Multiphase Subchannel Code

open access: yesYuanzineng kexue jishu
The spacer grid models are important models for simulating the thermal-hydraulics phenomena during reflooding process. The spacer grid pressure drop model, wall heat transfer enhancement model, interfacial heat transfer enhancement model, droplet ...
CHEN Lin, ZHANG Hao, DUAN Bingqi, MA Qichao, ZHOU Fanfan, YANG Yanhua, ZHAO Meng
doaj   +1 more source

Hippocampal remapping is constrained by sparseness rather than capacity. [PDF]

open access: yesPLoS Computational Biology, 2014
Grid cells in the medial entorhinal cortex encode space with firing fields that are arranged on the nodes of spatial hexagonal lattices. Potential candidates to read out the space information of this grid code and to combine it with other sensory cues ...
Axel Kammerer, Christian Leibold
doaj   +1 more source

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