Results 61 to 70 of about 25,088,946 (286)

Identification of Abnormal data in online dissolved gas monitoring in oil based on PCA and Fast-MCD

Zhejiang dianli
To detect the operational status of transformers by online monitoring of dissolved gases in oil is critical for ensuring its stable operation. However， faults in monitoring devices can result in abnormal data， severely impacting the effect of online ...
WANG Ziling, WANG Ke, CHAI Weijian, LI Yexin, ZOU Guoping, AN Siguang   +5 more
doaj   +1 more source

Fuzzy Logic Approach to Dissolved Gas Analysis for Power Transformer Failure Index and Fault Identification

Energies, 2020
This research focuses on problem identification due to faults in power transformers during operation by using dissolved gas analysis such as key gas, IEC ratio, Duval triangle techniques, and fuzzy logic approaches.
Nitchamon Poonnoy, Cattareeya Suwanasri, Thanapong Suwanasri   +2 more
doaj   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

The Role of Ultra‐Thin Passive Films and Organic Adsorbates on Aluminum Chips for a Friction‐Induced Solid‐State Recycling Process

Advanced Engineering Materials, EarlyView.
Despite benefits to storage stability and handleability of aluminum scrap, octadecyl phosphonic acid (ODPA) SAMs reduce the tensile strength of wires produced using friction‐induced recycling. Etching and methyl diphosphonic acid (MDPA) coatings, however, have little effect.
Timothy D. Goller, Steffen Gabsa, Werner Homberg, Guido Grundmeier   +3 more
wiley   +1 more source

Impact of the Process Atmosphere During Hot Isostatic Pressing on the Near‐Surface Composition of an Additively Manufactured Austenitic High‐Interstitial Steel

Advanced Engineering Materials, EarlyView.
A high interstital austenitic steel is additively manufactured and postdensified by HIP to eliminate gas porosity. Thereby, the loss of N and Mn in Ar HIP atmosphere is investigated. Further, HIP using N2 atmosphere is investigated which led to excessive nitride formation.
F. Großwendt, J. Hahn, J. Kimm, S. Weber, J. Lentz   +4 more
wiley   +1 more source

A review of optical gas sensing technology for dissolved gas analysis in transformer oil

Frontiers in Physics
Dissolved gas analysis (DGA) of transformer oil can deeply understand the operation status of oil-immersed transformers, and detect early transformer failures as early as possible, thus achieving the purpose of preventing further damage to the ...
Jialiang Dai, Jialiang Dai, Bing Luo, Xiaowen Shen, Xiaowen Shen, Wenfei Han, Wenfei Han, Ruyue Cui, Ruyue Cui, Jintao Wu, Jintao Wu, Haofeng Zhang, Wei Xiao, Zheng Zhong, Lei Dong, Lei Dong, Hongpeng Wu, Hongpeng Wu   +17 more
doaj   +1 more source

Mitigating Creep Anisotropy and Enhancing Performance in Additively Manufactured Ni‐Based Superalloys: A Review

Advanced Engineering Materials, EarlyView.
Additive manufacturing introduces pronounced microstructural and crystallographic anisotropy in Ni‐based superalloys, resulting in orientation‐dependent creep deformation and damage. This review identifies the key microstructural origins of creep anisotropy, examines their influence on dominant deformation mechanisms, and highlights processing ...
Chandan Kumar, Shobhit Pratap Singh, Gaurav Mohanty, Praveen Kumar   +3 more
wiley   +1 more source

DETERMINATION OF THE VALUES OF THE BOUNDARY CONCENTRATIONS OF GASES TAKING INTO ACCOUNT THE TYPE OF PROTECTION OF OIL OF HIGH VOLTAGE TRANSFORMERS

Elektrotehnìka ta Elektroenergetika, 2018
Purpose. Development of a method for determining the boundary values of gas concentrations, taking into account the characteristics of the gas content of equipment with different types of oil protection. Methodology.
O. V. Shutenko
doaj   +1 more source

Electrodeposition in Structural Lattices of Variable Architectures

Advanced Engineering Materials, EarlyView.
Electrodeposition enables geometry‐sensitive, autonomous void filling while simultaneously tuning chemical and mechanical properties. The development of approaches that can autonomously fill and heal material voids and yield composites with tailorable properties is increasingly relevant in engineering.
Yeong‐Man Kwon, Jingwen Zhang, Guido Musso, Alessandro F. Rotta Loria   +3 more
wiley   +1 more source

ANALISIS INDIKASI KEGAGALAN TRANSFORMATOR DENGAN METODE DISSOLVED GAS ANALYSIS [PDF]

, 2011
Permasalahan yang umum pada operasional transformator daya adalah timbulnya kegagalan, baik kegagalan termal maupun kegagalan elektris. Kegagalan termal dan kegagalan elektris umumnya menghasilkan gas-gas berbahaya yang biasa dikenal sebagai fault gas ...
Karnoto , Karnoto, Sukmadi, Tedjo, Faishal A.R, Muhammad   +2 more
core   +1 more source