Results 71 to 80 of about 25,394,445 (190)

Review of Insulation Ageing and Lifecycle Management for Oil‐Immersed Power Equipment: From Conventional Testing Analysis to Artificial Intelligence Method

High Voltage, Volume 11, Issue 5, Page 1303-1326, October 2026.
ABSTRACT Oil‐immersed power equipment is a critical component for energy transmission and secure operation of modern power grids. The ageing of oil–paper insulation under combined electrical, thermal and mechanical stresses directly affects equipment lifetime and system reliability. This paper presents a comprehensive review of the ageing behaviour and
Ruijin Liao, Jian Hao, Jing Xu, George Chen, Huanchao Cheng, Jiacong Li, Xize Dai   +6 more
wiley   +1 more source

Electrochemical gas sensors can make DGA a portable screening procedure [PDF]

, 2008
Dissolved Gas Analysis (DGA) in its classical chromatography-based laboratory approach has become a routine procedure for testing and assessment of power transformer condition.
Zylka, P
core  

Research Progress on Electrical Insulation Under Superimposed Voltage With High‐Frequency Harmonics in New‐Type Power Systems

High Voltage, Volume 11, Issue 5, Page 1265-1302, October 2026.
ABSTRACT A new‐type power system serves as a critical technical support for the integration of new energy, and its secure and stable operation is of great importance. However, the extensive utilisation of power electronic devices leads to power equipment insulation being subjected to electrical stresses of high‐frequency harmonics, which can easily ...
Shengtao Li, Chuang Zhang, Weiwang Wang, Yuanwei Zhu, Liuqing Yang   +4 more
wiley   +1 more source

A Review of the Functional Properties of Ester Liquids for Power Transformers

High Voltage, Volume 11, Issue 5, Page 1376-1398, October 2026.
ABSTRACT Ester liquids have become viable alternatives to conventional mineral oils for power transformer applications, mainly driven by increasing demands for enhanced fire safety and environmental sustainability. This paper reviews the historical development and functional properties of synthetic and natural ester liquids, with particular emphasis on
Qiang Liu, Shanika Matharage, Stefan Tenbohlen, Xiaojing Zhang, Yang Xu, Hui Ma, Tapan Saha, Issouf Fofana, Shuhang Shen, Norhafiz Azis, Zhongdong Wang   +10 more
wiley   +1 more source

Analyzing the Impact of TiO₂ Nanoparticles in Transformer Oil-Based Nanofluids Through Dissolved Gas Analysis

IEEE Access
Nanofluids based on transformer oil have emerged as promising candidates for improving insulation performance in high-voltage equipment. This study investigates the influence of TiO2 nanoparticles on the dielectric strength and dissolved gas behavior of ...
Abhijeet Lal, Anup Mishra, Anupam Agrawal, Raunak Kumar Tamrakar, Nagendra Tripathi, Sunil Kumar Chouhan, Narendra Khatri   +6 more
doaj   +1 more source

Analysis of Transformer Oil Condition of Dissolved Gas Analysis (DGA) Testing Results with Modified Conventional Methods

International Journal of Electrical, Computer, and Biomedical Engineering
Power transformers are one of the most widely used important components in the electric power system. Dissolved Gas Analysis (DGA) testing is used to diagnose transformer failures before more severe damage occurs by analyzing gas indicators dissolved in transformer oil through several methods, one of which uses conventional methods.
Randy Purnawan Budhihadi, Budi Sudiarto
openaire   +1 more source

Phosphorus addition shifts elevated CO2 effects on soil respiration from rhizosphere to root pathways in a mature eucalypt woodland

New Phytologist, Volume 252, Issue 1, Page 100-113, October 2026.
Summary diagram of the utilization of additional carbohydrates fixed under elevated CO2 belowground in natural low‐phosphorus (P) (a) and P‐fertilized (b) conditions. Soil respiration consists of heterotrophic respiration from microbial activity in bulk soil, autotrophic respiration from fine‐root activity and rhizomicrobial respiration driven by ...
Min Zhao, Qi Jiang, Catriona A. Macdonald, David T. Tissue, Wen Wen, Juan Piñeiro, Nam Jin Noh, Elise Pendall, Benjamin Smith, David S. Ellsworth, Mingkai Jiang, Belinda E. Medlyn   +11 more
wiley   +1 more source

Intelligent Fault Detection of MV/HV Transformers Using Fuzzy Logic Based on DGA

Eng
Dissolved Gas Analysis (DGA) of power system transformers has emerged as one of the most effective transformer health diagnosing tools by analyzing the gases dissolved in the insulating oil.
Lone Larona Mogotsi, Akhtar Rasool, Edwin Matlotse, Sadaqat Ali, Ahmed Ali   +4 more
doaj   +1 more source

Reaction Environment Engineering for Selective C3+ Formation in CO2 Electroreduction: Progress and Perspectives

Angewandte Chemie, Volume 138, Issue 37, 7 September 2026.
This work focuses on how to improve the selectivity and activity of electrocatalytic CO2 reduction to C3+ products, by the integration of electrocatalyst and electrolyte co‐design. We summarize key C3+ formation mechanisms and provide a comprehensive reaction network through thermodynamic analysis.
Ling Chen, Damien Voiry, Yan Jiao
wiley   +1 more source

DEVELOPMENT OF FUZZY NEURAL NETWORK FOR THE INTERPRETATION OF THE RESULTS OF DISSOLVED IN OIL GASES ANALYSIS

Electrical engineering & Electromechanics, 2017
Purpose. The purpose of this paper is a diagnosis of power transformers on the basis of the results of the analysis of gases dissolved in oil. Methodology. To solve this problem a fuzzy neural network has been developed, tested and trained. Results.
V.Е. Bondarenko, O.V. Shutenko
doaj   +1 more source