Results 51 to 60 of about 247 (145)
Journal of Mass Spectrometry, Volume 60, Issue 5, May 2025.ABSTRACT Oral fluid sampling offers advantages over other biological matrices, mainly due to its noninvasive procedure avoiding privacy intrusion. The fully automated sample preparation procedure is based on salting‐out assisted liquid–liquid extraction (SALLE) combined with high‐efficiency LC‐MS/MS methods for both screening and confirmation of 37 ...
Joakim Tan +3 more
wiley +1 more source
IEEE Access, 2021 Renewable energy (RE) generation levels are increasing in modern power systems at a fast rate due to their advantages of clean and non-exhaustible nature of energy.
Nagendra Kumar Swarnkar +3 more
doaj +1 more source
Tectonics, Volume 44, Issue 1, January 2025.Abstract Fold and thrust belts on the outer fringes of contractional mountain belts are classically interpreted as forming in sedimentary rocks that have detached from the underlying continental crust that acts as a rigid, undeformed basement. This is “thin‐skinned tectonics” and the Jura fold and thrust belt of northern Switzerland is an archetype. We
Robert W. H. Butler +2 more
wiley +1 more source
, 2020 This article proposes a fast and reliable two-level islanding detection method (IDM) for grid-connected photovoltaic system (GCPVS)-based microgrid. In the first level of the proposed IDM, the magnitude of the rate of change of output voltage (ROCOV) is ...
Popov, M. +7 more
core +1 more source
Multivariable passive method for detection of islanding events in renewable energy based power grids
IET Renewable Power Generation, 2022 Penetration of distributed generation resources (DGR) in power grid is rapidly increasing to meet future energy demand efficiently. It helps in mitigating the problems of high carbon emission, green house effect, and increased cost of oil and natural ...
Nagendra Kumar Swarnkar +3 more
doaj +1 more source
International Transactions on Electrical Energy Systems, Volume 2025, Issue 1, 2025.This study proposed a modified passive islanding technique that combines over/under frequency (OUF), rate of change of frequency (ROCOF), rate of change of phase angle difference (ROCPAD), and rate of change of voltage (ROCOV) for sensing of islanding and nonislanding conditions.
Bemdoo Saka +4 more
wiley +1 more source
Development Of Dynamic Estimators For Islanding Detection Of Inverter-Based Dg
, 2015 In this paper, a new islanding detection method (IDM) is proposed to dynamically estimate islanding occurrence. The proposed dynamic estimators estimate amplitudes and phase angles of the current injected by the grid at the point of common coupling with ...
Al Hosani, Mohamed +2 more
core +2 more sources
Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems
Applied System Innovation, 2019 The issue of unintentional islanding in grid interconnection still remains a challenge in grid-connected, Distributed Generation System (DGS). This study discusses the general overview of popular islanding detection methods.
Ashish Shrestha +9 more
doaj +1 more source
IET Renewable Power Generation, Volume 18, Issue S1, Page 4453-4464, 18 December 2024.A novel method for islanding detection which combined both phasor measurement units (PMU) and artificial neural network (ANN) is proposed. Using PMU measurements, the technique extracts features including phasor voltage, voltage frequency, and voltage rate of change of frequency (ROCOF), which later are fed into an ANN classifier. Abstract An essential
Mohammad Abu Sarhan +2 more
wiley +1 more source
IET Smart Grid, Volume 7, Issue 6, Page 1019-1035, December 2024.This paper proposes and demonstrates an efficient and accurate approach to islanding detection based on the Variance Autocorrelation Function of a Modal Current Envelope (VAMCE) technique. The VAMCE methodology is better suited for islanding detection because of its response to current sensitivity under islanding scenarios but not under normal ...
Shanzah Naseem +6 more
wiley +1 more source