Results 11 to 20 of about 646,559 (302)

New Experimental Tools to Use Noble Gases as Artificial Tracers for Groundwater Flow

Frontiers in Water, 2022
Labeling groundwater by injecting an artificial tracer is a standard and widely used method to study groundwater flow systems. Noble gases dissolved in groundwater are potentially ideal artificial tracers, as they are not subject to biogeochemical ...
Matthias S. Brennwald, Morgan Peel, Théo Blanc, Théo Blanc, Yama Tomonaga, Rolf Kipfer, Rolf Kipfer, Philip Brunner, Daniel Hunkeler   +8 more
doaj   +1 more source

Transformer Health Monitoring Using Dissolved Gas Analysis: A Technical Brief

International Journal of Prognostics and Health Management, 2022
As integral components of any power plant, transformers sup-ply the generated electricity to the grid. However, the trans-former’s cellulose-based paper insulation and the mineral oilin which it is immersed break down over time under stan-dard operating ...
Cody Walker, Ahmad Al Rashdan, Vivek Agarwal   +2 more
doaj   +1 more source

An Automatic System for Continuous Monitoring and Sampling of Groundwater Geochemistry in Earthquake-Prone Regions of SW Taiwan

Frontiers in Earth Science, 2021
Previous studies have revealed that gas compositions of fluid samples collected from southwestern Taiwan, where many hot springs and mud volcanoes are distributed along with tectonic structures, show significant variation before and after some disaster ...
Ching-Chou Fu, Chun-Wei Lai, Tsanyao Frank Yang, David R. Hilton, Cheng-Hong Chen, Vivek Walia, Arvind Kumar, Lou-Chuang Lee   +7 more
doaj   +1 more source

An Interval Forecasting Model Based on Phase Space Reconstruction and Weighted Least Squares Support Vector Machine for Time Series of Dissolved Gas Content in Transformer Oil

Energies, 2020
Transformer state forecasting and fault forecasting are important for the stable operation of power equipment and the normal operation of power systems.
Fang Yuan, Jiang Guo, Zhihuai Xiao, Bing Zeng, Wenqiang Zhu, Sixu Huang   +5 more
doaj   +1 more source

Diagnosis Kondisi Transformator Berbasis Analisis Gas Terlarut Menggunakan Metode Sistem Pakar Fuzzy

Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems), 2014
Dissolved gas analysis of transformer oil is one of the most effective ways to determine the transformer condition. Currently, there are many interpretation techniques that have been used in data processing of dissolved gas analysis results. However, all
Gatut Yulisusianto, Hadi Suyono, Rini Nurhasanah   +2 more
doaj   +1 more source

Condition Assessment of Power Transformers through DGA Measurements Evaluation Using Adaptive Algorithms and Deep Learning

Energies, 2022
Condition assessment for critical infrastructure is a key factor for the wellbeing of the modern human. Especially for the electricity network, specific components such as oil-immersed power transformers need to be monitored for their operating condition.
Dimitris A. Barkas, Stavros D. Kaminaris, Konstantinos K. Kalkanis, George Ch. Ioannidis, Constantinos S. Psomopoulos   +4 more
doaj   +1 more source

A Deep Parallel Diagnostic Method for Transformer Dissolved Gas Analysis

Applied Sciences, 2020
With the development of Industry 4.0, as a pivotal part of the power system, large-capacity power transformers are requiring fault diagnostic methods with higher intelligence, accuracy and anti-interference ability.
Xiaoxin Wu, Yigang He, Jiajun Duan
doaj   +1 more source

Assessing connectivity between an overlying aquifer and a coal seam gas resource using methane isotopes, dissolved organic carbon and tritium [PDF]

, 2015
Coal seam gas (CSG) production can have an impact on groundwater quality and quantity in adjacent or overlying aquifers. To assess this impact we need to determine the background groundwater chemistry and to map geological pathways of hydraulic ...
A Green-Saxena, A Vengosh, BE Fontenot, BFJ Kelly, C Duvert, CD Keeling, CD Keeling, DDR Owen, DE Pataki, DL Valentine, DT Maher, E Dafny, ECP Kinnon, EG Nisbet, EJ Dlugokencky, G Antler, JA Hakala, JF Barker, JW Roy, K Knittel, MJ Whiticar, NG Phillips, P Quay, RB Jackson, RE Fisher, S Cuna, S Qin, SG Osborn, SK Hamilton, SK Hamilton, SL Papendick, TA Moore   +31 more
core   +1 more source

Analysis of the Content of Gases in Oil-Filled Equipment with Electrical Defects [PDF]

Problems of the Regional Energetics, 2018
Operational reliability assurance of oil-filled equipment is an urgent real-world problem, which is especially essential for the facilities that have exceeded their lifetime.
Shutenko O.V.
doaj   +1 more source

Power Transformer Diagnosis Based on Dissolved Gases Analysis and Copula Function

Energies, 2022
The traditional DGA (Dissolved Gas Analysis) diagnosis method does not consider the dependence between fault characteristic gases and uses the relationship between gas ratio coding and fault type to make the decision.
Xiaoqin Zhang, Hongbin Zhu, Bo Li, Ruihan Wu, Jun Jiang   +4 more
doaj   +1 more source