Results 141 to 150 of about 25,281,968 (246)

Plasmonic Field-Enhanced Raman Sensing Enables Rapid Trace Methanol Detection in Transformer Oil. [PDF]

Sensors (Basel)
Zhang X, Zhu H, Liu H, Cao J, Shi H, Niu S.   +5 more
europepmc   +1 more source

Diffusion of Characteristic Gases in Oil‐Immersed Transformer by Computational Fluid Dynamics Simulation and Experimental Verification

High Voltage, EarlyView.
ABSTRACT The complex diffusion of characteristic gases within oil‐immersed transformers significantly influences the timeliness between the fault occurrence and gas detection. So far, the gas transport processes and spatio‐temporal distributions remain inadequately understood.
Chunpeng Li, Yuan Li, Jianyi Wang, Zhengqin Zhou, Zhihao Liu, Zhiqiu Chen, Dongyang Zheng, Guanjun Zhang   +7 more
wiley   +1 more source

SERS-Enabled Direct Detection of Furfural in a Complex Oil Mixture. [PDF]

Sensors (Basel)
Zhang X, Zhu H, Liu H, Cao J, Shi H, Niu S.   +5 more
europepmc   +1 more source

Endurance of Epoxy Resin Cast Insulation With Interfacial Micro‐Crack Defect Under 50 Hz Sine and Kilohertz Square Voltages

High Voltage, EarlyView.
ABSTRACT Crack‐type defects are commonly found in epoxy composite cast insulation due to residual, thermal and external stresses. When combined with inverter‐type voltage stress, as in epoxy cast high‐frequency transformers (HFTs), the likelihood of insulation failure increases significantly. In this study, a method setting microcracks perpendicular to
Xingyu Shang, Lei Pang, Ziyan Yu, Wanlin Tang, Xiang Cai   +4 more
wiley   +1 more source

A Review of Physics-Informed and Data-Driven Surrogate Models for Power Transformer Fault Diagnosis. [PDF]

Sensors (Basel)
Wan G, Yang K, Xiong F, Chen J.
europepmc   +1 more source

Insulation–Vibration Dynamics Model and Experimental Investigation of Cable Gas‐Insulated Switchgear Terminations

High Voltage, EarlyView.
ABSTRACT Numerous breakdowns in cable gas‐insulated switchgear (GIS) terminations stem from inadequate insulation and interfacial stresses. However, existing diagnostic techniques, such as partial discharge detection and microwave detection, are highly susceptible to electromagnetic interference, or their diagnostic signals are often attenuated by the ...
Zeyan Zhang, Binlong Cao, Zhidong Jia
wiley   +1 more source

Partial Discharge Characteristics and Aging Identification Model of Polymer Insulation Materials in Environmentally Friendly Insulating Liquids Under Electro-Thermal Aging Conditions. [PDF]

Polymers (Basel)
Ye W, He Y, Kong X, Ding T, Qiao X, Dai X, Yan J.   +6 more
europepmc   +1 more source

An Improved Method for Calculating the Radiative Cooling Heat Dissipation Power of an Oil‐Natural‐Air‐Natural Transformer

High Voltage, EarlyView.
ABSTRACT Radiative cooling holds potential for outdoor transformers in operation due to its zero‐energy consumption and high adaptability and has demonstrated effective heat dissipation in simulations of small distribution transformers. Accurate calculation of the transformer temperature rise and the radiative cooling effect is crucial for practical ...
Guoqiang Gao, Chuan Zhang, Yujun Guo, Yijie Liu, Xianzhi Zhou, Xiangyu Liu, Xingyi Huang, Guangning Wu   +7 more
wiley   +1 more source

Insulation failure mapping on power transformer bushing using FRA and electrostatic simulation. [PDF]

PLoS One
Al-Ameri SM, Hamanah WM, Salem AA, Yousof MF, Ahmed Al-Gailani S, Abu-Siada A.   +5 more
europepmc   +1 more source

Influence of Dissolved Oxygen on the Gassing Tendency of Biodegradable Insulating Liquids Under Thermal and Electrical Faults

High Voltage, EarlyView.
ABSTRACT Dissolved gas analysis (DGA), widely used for fault diagnosis, can be significantly influenced by the presence of oxygen. Oxygen not only accelerates fluid degradation but also alters the type and concentration of fault gases generated, potentially leading to misinterpretation of transformer conditions if conventional DGA models are applied ...
Moïse Agouassi, U. Mohan Rao, Issouf Fofana, Yazid Hadjadj, Fethi Maghnefi   +4 more
wiley   +1 more source