Results 21 to 30 of about 24,723,956 (329)

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

Comparative Performance Study of Dissolved Gas Analysis (DGA) Methods for Identification of Faults in Power Transformer

International Journal of Energy Research, 2023
The power transformer is an essential component of the electrical network that can be used to step up and step down voltage. Dissolved gas analysis (DGA) is the most reliable method for the identification of incipient faults in power transformers ...
A. Wajid, A. Rehman, Sheeraz Iqbal, Mukesh Pushkarna, S. M. Hussain, Hossam Kotb, Mohammed Alharbi, Ievgen O. Zaitsev   +7 more
semanticscholar   +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

Spectrometric methodology for dissolved gas analysis [PDF]

Transformers Magazine
In previous columns, gas chromatography and electrochemical approaches for dissolved gas measurement were described. In this column, the oldest and emerging method, spectrometry, is described. It is an applicable method for most online and portable devices, and it may reappear in laboratories as reliable and standardized.
Grisaru, Marius
core   +3 more sources

Analysis of interference methods on transformers based on the results of dissolved gas analysis tests

International Journal of Electrical and Computer Engineering (IJECE), 2023
In the operation of the power transformer, several maintenance efforts must be made to ensure the condition of the transformer is in good condition. The problems that usually arise are a thermal failure and electrical failure. The use of insulating media
Yulianta Siregar, Timothy Juan Hartanto Lumbanraja   +1 more
semanticscholar   +1 more source

Analysis and interpretation of dissolved gases in transformer oil: A case study [PDF]

, 2012
Condition monitoring plays a vital role in any asset management plan. Dissolved gas analysis is a routine test carried out on power transformers to monitor their condition.
H. A. Fonseka, S. N. Hettiwatte, Fonseka, H.A., HA Fonseka (17984935), Hettiwatte, S.N., SN Hettiwatte (17961161)   +5 more
core   +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