Results 51 to 60 of about 21,643 (304)

Overcurrent Limitation and Enhanced Fault Current Utilization by Grid-Forming Inverter Using Hybrid Methods During Short Circuit Faults

IEEE Access
The next-generation grid-forming (GFM) inverters face significant over-current and over-voltage challenges during grid faults due to their inherent voltage source behaviour behind impedance. These challenges are mitigated by simultaneously reconstructing
Jack Benjamin, Animesh Kumar Sahoo, Pratyasa Bhui   +2 more
doaj   +1 more source

Unified Power Control of Permanent Magnet Synchronous Generator Based Wind Power System with Ancillary Support during Grid Faults

Energies, 2022
A unified active power control scheme is devised for the grid-integrated permanent magnet synchronous generator-based wind power system (WPS) to follow the Indian electricity grid code requirements.
Vijayapriya Ramachandran, Angalaeswari Sendraya Perumal, Natrayan Lakshmaiya, Prabhu Paramasivam, Seshathiri Dhanasekaran   +4 more
doaj   +1 more source

A Novel Method for the Fault Diagnosis of a Planetary Gearbox based on Residual Sidebands from Modulation Signal Bispectrum Analysis [PDF]

, 2014
This paper presents a novel method for the fault diagnosis of planetary gearboxes based on an accurate estimation of residual sidebands using a modulation signal bispectrum (MSB).
Abdalla, Gaballa M., Ball, Andrew, Gu, Fengshou, Xun, Haijun, Zhang, Riliang   +4 more
core  

Preferences for post‐traumatic osteoarthritis prevention strategies in individuals with anterior cruciate ligament injury

Arthritis Care &Research, Accepted Article.
Objectives There is growing interest in evaluating new strategies to delay or prevent post‐traumatic osteoarthritis (PTOA) in individuals who have sustained anterior cruciate ligament (ACL) injury. This study sought to determine characteristics of potential treatments that are acceptable to patients with ACL injury.
Kevin Kennedy, Lily Waddell, Adam Easterbrook, Jeffrey N. Katz, Cale Jacobs, Morgan Jones, Faith Selzer, Elena Losina, Liana Fraenkel, Nick Bansback   +9 more
wiley   +1 more source

Control Strategy for a Grid-Connected Inverter under Unbalanced Network Conditions—A Disturbance Observer-Based Decoupled Current Approach

Energies, 2017
This paper proposes a new approach on the novel current control strategy for grid-tied voltage-source inverters (VSIs) with circumstances of asymmetrical voltage conditions.
Emre Ozsoy, Sanjeevikumar Padmanaban, Lucian Mihet-Popa, Viliam Fedák, Fiaz Ahmad, Rasool Akhtar, Asif Sabanovic   +6 more
doaj   +1 more source

Influence Mechanism and Suppression Control of the MMC on Short-Circuit Current Under AC Faults

IEEE Access, 2020
Modular multilevel converter based high voltage direct current (MMC-HVDC) transmission systems may increase the short-circuit current and affect the AC fault clearing of circuit breakers.
Jian Yang, Shurui Mao, Xiaodong Li, Zheng Xu   +3 more
doaj   +1 more source

Sea Beam Survey of an Active Strike-Slip Fault: The San Clemente Fault in the California Continental Borderland [PDF]

, 1989
The San Clemente fault, located in the California Continental Borderland, is an active, northwest trending, right-lateral, wrench fault. Sea Beam data are used to map the major tectonic landforms associated with active submarine faulting in detail ...
de Moustier, Christian, Legg, Mark R, Luyendyk, Bruce P, Mammerickx, Jacqueline, Tyce, Robert C.   +4 more
core   +2 more sources

Risk of Retinopathy Associated with Long‐Term Use of Hydroxychloroquine in Patients with Rheumatic Diseases: A Systematic Review and Meta‐Analysis

Arthritis Care &Research, EarlyView.
Objective We aimed to estimate the prevalence and cumulative incidence of hydroxychloroquine retinopathy (HCQ‐R) and its risk factors among patients receiving long‐term HCQ with rheumatic diseases through a systematic review and meta‐analysis of observational studies that used spectral‐domain optical coherence tomography (SD‐OCT) for screening ...
Narsis Daftarian, Chloe Yue, Steve D Levasseur, Hui Xie, J. Antonio Avina‐Zubieta   +4 more
wiley   +1 more source

Performance Improvement of Grid-Integrated Doubly Fed Induction Generator under Asymmetrical and Symmetrical Faults

Energies, 2023
The doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) suffers from voltage and frequency fluctuations due to the stochastic nature of wind speed as well as nonlinear loads. Moreover, the high penetration of wind energy into
Mansoor Soomro, Zubair Ahmed Memon, Mazhar Hussain Baloch, Nayyar Hussain Mirjat, Laveet Kumar, Quynh T. Tran, Gaetano Zizzo   +6 more
doaj   +1 more source

Minerals in Afghanistan : The Aynak Copper Deposit [PDF]

, 2006
The area around Aynak, 30 km south-south-east of Kabul in south-east Afghanistan, has been the focus of copper working since ancient times. Numerous old excavations and pits, as well as remains of smelting furnaces, have been discovered at Aynak and ...
Benham, Antony John, Coats, Stan
core