Results 31 to 40 of about 203,934 (147)

Fault diagnosis of transformer using artificial intelligence: A review

Frontiers in Energy Research, 2022
Transformer is one of the important components of the power system, capable of transmitting and distributing the electricity generated by renewable energy sources.
Yan Zhang, Yufeng Tang, Yongqiang Liu, Zhaowen Liang   +3 more
doaj   +1 more source

Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study

Energies, 2020
The article describes a case study when the voltage collapse during lightning impulse tests of new power transformers was noticed and when the repeated tests finished with a positive result.
Tomasz Piotrowski, Pawel Rozga, Ryszard Kozak, Zbigniew Szymanski   +3 more
doaj   +1 more source

Analysis Oil Condition of Transformer PT-8801-A by Using the Method TDCG, Rogers Ratio, Key Gas, and Duval Triangle: A Case Study at PT. Perta Arun Gas

Journal of Renewable Energy, Electrical, and Computer Engineering, 2022
The power transformer would have happened disturbanced that can cause a failure at a transformer. For this condition needed to maintenance power transformer, one of which is by analyzing transformer oil by using the TDCG method. This analysis is carried out to determine the diagnosis of faults in the transformer.
Rastra Furqaranda, Andik Bintoro, Asri Asri, Waleed Khalid Ahmed Al-Ani, Ashish Shrestha   +4 more
openaire   +1 more source

Detection of Incipient Faults in Power Transformers using Fuzzy Logic and Decision Tree Models Based on Dissolved Gas Analysis

ABUAD Journal of Engineering Research and Development
This paper proposes an integrated approach utilizing Fuzzy Logic and Decision Tree algorithms to diagnose early-stage faults in power transformers based on Dissolved Gas Analysis (DGA) test results of transformer insulation oil.
Felix Olowolafe, Kehinde Olukunmi Alawode   +1 more
doaj   +1 more source

Enhancing Diagnostic Accuracy of Transformer Faults Using Teaching-Learning-Based Optimization

IEEE Access, 2021
The early detection of the transformer faults with high accuracy rates guarantees the continuous operation of the power system networks. Dissolved gas analysis (DGA) is a technique that is used to detect or diagnose the transformer faults based on the ...
Sherif S. M. Ghoneim, Karar Mahmoud, Matti Lehtonen, Mohamed M. F. Darwish   +3 more
doaj   +1 more source

Influence of ageing on oil degradation and gassing tendency under high-energy electrical discharge faults for mineral oil and synthetic ester

High Voltage, 2020
In this work, mineral oil and synthetic esters were selected at different ageing factors (based on acidity values). Fresh and aged oils have been subjected to high-energy discharges (repeated 100 breakdowns) to simulate electric faults of highly ...
L. Loiselle, U. Mohan Rao, I. Fofana, I. Fofana   +3 more
doaj   +1 more source

Guidelines for Meta‐Analytic Structural Equation Modeling: Steps, Resources, and Illustrations

Psychology &Marketing, EarlyView.
ABSTRACT The goal of science is to build incremental, structured, and reliable knowledge over time. Yet, many strands of marketing and related disciplines exhibit symptoms of cumulative stagnation, including lack of replicability and weak theoretical integration. Existing remedies such as replication studies, multistudy investigations, and open science
Hassam Waheed, Weng Marc Lim
wiley   +1 more source

Comparison of Dissolved Gases in Mineral and Vegetable Insulating Oils under Typical Electrical and Thermal Faults

Energies, 2016
Dissolved gas analysis (DGA) is attracting greater and greater interest from researchers as a fault diagnostic tool for power transformers filled with vegetable insulating oils.
Chenmeng Xiang, Quan Zhou, Jian Li, Qingdan Huang, Haoyong Song, Zhaotao Zhang   +5 more
doaj   +1 more source

Reliable Estimation for Health Index of Transformer Oil Based on Novel Combined Predictive Maintenance Techniques

IEEE Access, 2022
Transformer oil insulation condition may be deteriorated due to electrical and thermal faults, which may lead to transformer failure and system outage. In this regard, the first part of this paper presents comprehensive maintenance for power transformers
Mohamed Badawi, Shimaa A. Ibrahim, Diaa-Eldin A. Mansour, Adel A. El-Faraskoury, Sayed A. Ward, Karar Mahmoud, Matti Lehtonen, Mohamed M. F. Darwish   +7 more
doaj   +1 more source

Forensic Hydraulic Analysis of Floodplain Connectivity Driven by Historical Beaver Dams in Colorado Headwater Streams

River Research and Applications, EarlyView.
ABSTRACT As ecosystem engineers, beavers (Castor canadensis) modify river corridor form through dam building. When beavers are removed from a river corridor, their unmaintained dams wash out, altering the stream's hydrologic regime. The assumption that beaver dams increase floodplain connectivity is frequently presumed but has not been directly ...
Kayla Schultz, Ryan R. Morrison, Sara Rathburn, Connor Mertz, Nicholas Christensen   +4 more
wiley   +1 more source