Results 91 to 100 of about 142,131 (309)

Comparison between two VSC-HVDC transmission systems technologies : modular and neutral point clamped multilevel converter [PDF]

, 2009
The paper presents a detail comparison between two voltage source converter high voltage dc transmission systems, the first is based on neutral point-clamped (also known as HVDC-Light) and the second is based on innovative modular multilevel converter ...
Adam, G.P., Anaya-Lara, O., Burt, G.M., Finney, S.J., McDonald, J.R., Williams, B.W.   +5 more
core  

Fault Tolerant Ancillary Function of Power Converters in Distributed Generation Power System within a Microgrid Structure [PDF]

, 2013
Distributed generation (DG) is deeply changing the existing distribution networks which become very sophisticated and complex incorporating both active and passive equipment.
DI TOMMASO, Antonino Oscar, GENDUSO, Fabio, MICELI, Rosario, RICCO GALLUZZO, Giuseppe   +3 more
core   +3 more sources

Confessions of a Poverty Researcher: My Journey Through the Foothills of Scholarship

Australian Journal of Social Issues, EarlyView.
ABSTRACT This paper describes the key events, experiences and ideas that influenced the author's career as a poverty researcher. He describes how his early disillusion with economics was replaced by a spark of interest in social issues and how his migration from the UK to Australia in the mid‐1970s provided the impetus to begin what became a lifetime ...
Peter Saunders
wiley   +1 more source

FAULT RIDE-THROUGH CAPABILITY AND DAMPING IMPROVEMENT IN DFIG [PDF]

, 2016
Doubly-fed induction generator wind turbine is susceptible to faults and requires crowbar protection. When the crowbar is triggered, the rotor is short circuited over the crowbar impedance.
Dolara, Alberto, G., Sava, Grimaccia, Francesco, Leva, Sonia, M. Q., Duong, Mussetta, Marco   +5 more
core  

Sensorless control of a power converter for a cluster of small wind turbines [PDF]

, 2016
This study presents a new sensorless control for small wind turbine clusters with a single power converter with a direct torque control algorithm. The proposed system consists of a wind farm connected to a back-to-back power converter that interfaces the
Araguees Penalba, Monica, Egea Álvarez, Agustí, Gomis Bellmunt, Oriol, Rull Duran, Joan, Sudrià Andreu, Antoni   +4 more
core   +2 more sources

T. rex cognition was T. rex‐like—A critical outlook on diverging views of the neurocognitive evolution in dinosaurs

The Anatomical Record, EarlyView.
Abstract A recent debate has emerged between Caspar et al. (2024) and Herculano‐Houzel (2023) on inferring extinct dinosaur cognition by estimating brain neuron counts. While thought‐provoking, the discussion largely overlooks the function of cognition, as well as partly neglects the difficulties involved in estimating neuron numbers, which according ...
Thomas Rejsenhus Jensen, Ivo Jacobs, Kristina Kverková, Lona Lalić, Alexandra Polonyiová, Patrik Stehlík, Stephan A. Reber, Mathias Osvath   +7 more
wiley   +1 more source

Comprehensive fault ride‐through scheme for doubly‐fed induction generators

The Journal of Engineering, 2018
With the growth of wind energy penetration in electricity transmission grids, fault ride‐through (FRT) ability is required in order to maintain the uninterrupted operation of wind farm in voltage disturbance scenarios. For widespread used doubly‐fed induction generator FRT issues, an auxiliary hardware circuit is adopted in large‐grid‐voltage drop ...
Fan Cheng, Liangzhong Yao, Yan Li, Lijun Xie, Chunxia Wei   +4 more
openaire   +2 more sources

Current-limiting droop controller with fault-ride-through capability for grid-tied inverters [PDF]

, 2017
In this paper, the recently proposed current-limiting droop (CLD) controller for grid-connected inverters is enhanced in order to comply with the Fault-Ride-Through (FRT) requirements set by the Grid Code under grid voltage sags.
Konstantopoulos, G.C., Mayfield, M., Nikolaidis, V.C., Paspatis, A.G.   +3 more
core   +1 more source

Parental involvement and engagement during COVID‐19 lockdowns: School staff and parents' reflections about children's learning at home

British Educational Research Journal, EarlyView.
Abstract Valuing parental engagement, as part of home–school collaboration, can benefit children's learning. This article focuses on parents and school‐based staff's (N = 120) experiences of children's learning occurring at home during the COVID‐19 lockdowns (2020–2021), both school‐mandated and other learning activities.
Ashley Brett, Bonny L. Hartley, Deborah Wallace, Adewale Magaji, Lorraine Smith, Rachel Wolfendale   +5 more
wiley   +1 more source

A Black Box Doubly Fed Wind Turbine Electromechanical Transient Structured Model Fault Ride-Through Control Identification Method Based on Measured Data

Applied Sciences
With the increasing proportion of grid-connected capacity of new energy units, such as wind power and photovoltaics, accurately constructing simulation models of these units is of great significance to the study of new power systems.
Xu Zhang, Shenbing Ma, Jun Ye, Lintao Gao, Hui Huang, Qiman Xie, Liming Bo, Qun Wang   +7 more
doaj   +1 more source